WO2014168007A1 - 発電装置 - Google Patents
発電装置 Download PDFInfo
- Publication number
- WO2014168007A1 WO2014168007A1 PCT/JP2014/058591 JP2014058591W WO2014168007A1 WO 2014168007 A1 WO2014168007 A1 WO 2014168007A1 JP 2014058591 W JP2014058591 W JP 2014058591W WO 2014168007 A1 WO2014168007 A1 WO 2014168007A1
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- WIPO (PCT)
- Prior art keywords
- magnetostrictive
- magnetostrictive rod
- power generation
- rod
- beam member
- Prior art date
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Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N35/00—Magnetostrictive devices
- H10N35/101—Magnetostrictive devices with mechanical input and electrical output, e.g. generators, sensors
Definitions
- the present invention relates to a power generation device.
- this power generator includes a pair of magnetostrictive rods provided together, a connecting yoke that connects these magnetostrictive rods, a coil that is provided so as to surround each magnetostrictive rod, and a permanent magnet that applies a bias magnetic field to the magnetostrictive rod. And a back yoke.
- a pair of magnetostrictive rods function as opposing beams.
- an external force is applied to the connecting yoke in a direction perpendicular to the axial direction of the pair of magnetostrictive rods, one of the magnetostrictive rods deforms to extend, and the other The magnetostrictive rod deforms so as to contract.
- the density of magnetic lines passing through each magnetostrictive rod (magnetic flux density), that is, the density of magnetic lines passing through each coil changes, thereby generating a voltage in each coil.
- a method of increasing the number of turns of the wire by reducing the wire diameter without changing the interval between the magnetostrictive rods can be considered, but if the wire is made thin, the resistance value of the coil becomes high and sufficient. It is difficult to pass an amount of current through the coil.
- the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to make the stress generated in the magnetostrictive rod uniform while increasing the volume of the coil wound around the magnetostrictive rod,
- An object of the present invention is to provide a power generation device capable of generating power efficiently.
- Such an object is achieved by the present invention of the following (1) to (17).
- a connecting portion comprising at least one beam member to be connected,
- Each of the magnetostrictive elements is made of a magnetostrictive material, and includes a magnetostrictive rod that passes a magnetic line of force in the axial direction and a coil wound around the outer periphery of the magnetostrictive rod, and the other end is connected to one end of the magnetostrictive rod.
- It is configured to generate a voltage in the coil by changing the density of the lines of magnetic force by expanding and contracting the magnetostrictive rod by relatively displacing in a direction substantially perpendicular to the axial direction,
- the power generation device wherein the magnetostrictive rod of each magnetostrictive element and the beam member are arranged so as not to overlap each other in a plan view.
- the coil includes a bobbin disposed on the outer peripheral side of the magnetostrictive rod so as to surround the magnetostrictive rod, and a wire wound around the bobbin.
- the power generation device according to any one of (1) to (5), wherein a gap is formed at least on the other end side of the magnetostrictive rod between the magnetostrictive rod and the bobbin.
- the spring constant of the beam member is A [N / m]
- the number of the beam members is X [lines]
- the spring constant of the magnetostrictive rod is B [N / m]
- the number of the magnetostrictive rods is Y.
- Each of the magnetostrictive elements further includes a first block body having a housing portion that houses one end portion of the magnetostrictive rod, and a second housing portion that houses the other end portion of the magnetostrictive rod.
- the magnetostrictive rod has a flat plate shape
- the magnetostrictive rod has a flat plate shape
- a power generation device having at least one permanent magnet arranged such that the magnetization direction is a side direction in which the magnetostrictive element is provided;
- the permanent magnet is disposed between at least one of the first block bodies of the magnetostrictive element and at least one of the second block bodies of the magnetostrictive element.
- the power generation device including at least one permanent magnet arranged so that a magnetization direction is a side direction in which the magnetostrictive element is provided.
- the interval between the magnetostrictive rods can be arbitrarily set. For this reason, by enlarging the space
- FIG. 1 is a perspective view showing a first embodiment of a power generator of the present invention.
- FIG. 2 is an exploded perspective view of the power generator shown in FIG. Fig.3 (a) is a side view of the electric power generating apparatus shown in FIG.
- FIG. 3B is a diagram showing a state in which the coil is removed from each magnetostrictive element shown in FIG.
- FIG. 4 is a plan view of the power generator shown in FIG.
- FIG. 5 is a front view of the power generator shown in FIG.
- FIG. 6 is a side view for explaining a state in which the power generator shown in FIG. 1 is attached to the vibrating body.
- FIG. 1 is a perspective view showing a first embodiment of a power generator of the present invention.
- FIG. 2 is an exploded perspective view of the power generator shown in FIG. Fig.3 (a) is a side view of the electric power generating apparatus shown in FIG.
- FIG. 3B is a diagram showing a state in which the coil is removed from each
- FIG. 7 is a side view schematically showing a state in which an external force is applied downward with respect to the distal end of one bar (one beam) whose base end is fixed to the housing.
- FIG. 8 is a side view schematically showing a state in which an external force is applied downward to the distal ends of a pair of opposed parallel beams (parallel beams) whose base ends are fixed to the casing.
- FIG. 9 is a diagram schematically showing stress (elongation stress, contraction stress) applied to a pair of parallel beams to which an external force is applied to the tip.
- stress elongation stress, contraction stress
- FIG. 10 is a graph showing the relationship between the applied magnetic field (H) and the magnetic flux density (B) according to the generated stress in a magnetostrictive rod composed of a magnetostrictive material mainly composed of an iron-gallium alloy. It is.
- FIG. 11 is a plan view illustrating another configuration example of the power generation device according to the first embodiment of the present invention.
- FIG. 12 is a perspective view showing a second embodiment of the power generator of the present invention.
- Fig.13 (a) is a side view of the electric power generating apparatus shown in FIG.
- FIG.13 (b) is a figure which shows the state which removed the coil from each magnetostriction element shown to Fig.13 (a).
- FIG. 13 (a) is a side view of the electric power generating apparatus shown in FIG.
- FIG.13 (b) is a figure which shows the state which removed the coil from each magnetostriction element shown to Fig.13 (a).
- FIG.13 (a) is a side view of
- FIG. 14A is an analysis diagram in which the stress generated in the magnetostrictive rod and the beam member of the power generation apparatus according to the first embodiment shown in FIG. 1 is analyzed.
- FIG. 14B is an analysis diagram in which stress generated in the magnetostrictive rod and the beam member of the power generation apparatus of the present embodiment shown in FIG. 12 is analyzed.
- FIG. 15 is a perspective view showing a third embodiment of the power generator of the present invention. 16 is an exploded perspective view of the power generation device shown in FIG.
- FIG. 17A is a right side view of the power generation device shown in FIG.
- FIG. 17B is a diagram showing a state where the coil is removed from each magnetostrictive element shown in FIG. 18 is a front view of the power generation device shown in FIG.
- FIG.19 (a) is a right view which shows the state which attached the electric power generating apparatus (a coil is abbreviate
- FIG.19 (b) is a figure which shows the state which provided the external force to the downward direction with respect to the front-end
- FIG. 20 is an analysis diagram in which the stress generated in the magnetostrictive rod and the beam member of the power generator according to the third embodiment shown in FIG. 15 is analyzed.
- FIG. 21 is a perspective view showing a fourth embodiment of the power generator of the present invention. 22 (a) and 22 (b) are perspective views showing a bobbin of a coil provided in the power generator shown in FIG. FIG.
- FIG. 23A and FIG. 23B are perspective views showing a magnetostrictive rod and a coil included in the power generator shown in FIG.
- FIG. 23 (c) is a perspective view showing a cross section of the magnetostrictive rod and coil of FIG. 23 (a) cut along line BB.
- Fig.24 (a) is a side view for demonstrating the state which attached the electric power generating apparatus shown in FIG. 21 to the vibrating body.
- FIG. 24B is a longitudinal sectional view (a sectional view taken along line AA in FIG. 21) of the power generation device shown in FIG. 21 attached to the vibrating body.
- FIG. 25 is a side view showing another configuration example of the power generating device according to the third embodiment of the present invention.
- FIG. 23 (c) is a perspective view showing a cross section of the magnetostrictive rod and coil of FIG. 23 (a) cut along line BB.
- Fig.24 (a) is a side view for demonstrating the state which attached the electric power generating apparatus shown
- FIG. 26A shows the longitudinal direction of each region in the thickness direction of the magnetostrictive rod 2 when an external force is applied downward to the second block body 5 of the power generator 1 of the first embodiment. It is a graph which shows stress.
- FIG.26 (b) is a graph which shows the result of having performed the measurement similar to FIG.26 (a) about the electric power generating apparatus 1 of Example 2.
- FIG. FIG. 26C is a graph showing the results of the same measurement as in FIG. 26A for the power generator 1 of Example 3.
- FIG.26 (d) is a graph which shows the result of having performed the measurement similar to FIG.26 (a) about the electric power generating apparatus 1 of Example 4.
- FIG.26 (b) is a graph which shows the result of having performed the measurement similar to FIG.26 (a) about the electric power generating apparatus 1 of Example 2.
- FIG.26 (d) is a graph which shows the result of having performed the measurement similar to FIG.26 (a) about the electric power generating apparatus 1 of Example 4.
- FIG. 1 is a perspective view showing a first embodiment of a power generator according to the present invention.
- FIG. 2 is an exploded perspective view of the power generator shown in FIG. Fig.3 (a) is a side view of the electric power generating apparatus shown in FIG.
- FIG. 3B is a diagram showing a state in which the coil is removed from each magnetostrictive element shown in FIG.
- FIG. 4 is a plan view of the power generator shown in FIG.
- FIG. 5 is a front view of the power generator shown in FIG.
- FIG. 6 is a side view for explaining a state in which the power generator shown in FIG. 1 is attached to the vibrating body.
- FIGS. 1, 2, 3 (a), 3 (b), 5 and 6 and the front side in FIG. 4 are referred to as “up” or “upward”, 1, 2, 3 (a), 3 (b), the lower side in FIGS. 5 and 6, and the back side in FIG. 4 are referred to as “lower” or “lower”.
- 1 and 2 and the right side in FIGS. 3A, 3B, 4 and 6 are referred to as “tip”, and the left front side of FIG. 1 and FIG.
- the left side in FIGS. 3A, 3B, 4 and 6 is referred to as a “base end”.
- the power generation device 1 shown in FIGS. 1 and 2 includes two magnetostrictive elements 10 and 10 provided side by side, a connecting portion 7 that is provided on the upper side and connects the magnetostrictive elements 10 and 10, and the magnetostrictive elements 10 and 10. It has the permanent magnets 6 and 6 provided between them.
- the magnetostrictive element 10 is made of a magnetostrictive material, and includes a magnetostrictive rod 2 that passes magnetic lines of force in the axial direction, a coil 3 wound around the outer periphery of the magnetostrictive rod 2, and a first end provided on the proximal end side of the magnetostrictive rod 2.
- the block body 4 and the second block body 5 provided on the other end side of the magnetostrictive rod 2 are provided.
- the magnetostrictive element 10 has a first block body 4 side (one end) as a fixed end and a second block body 5 side (the other end) as a movable end, and a direction substantially perpendicular to the axial direction (in FIG.
- the magnetostrictive rod 2 expands and contracts due to this displacement.
- the magnetic permeability of the magnetostrictive rod 2 changes due to the inverse magnetostrictive effect, and the density of the magnetic lines passing through the magnetostrictive rod 2 (the density of the magnetic lines passing through the coil 3) changes, whereby a voltage is generated in the coil 3.
- the magnetostrictive rod 2 is made of a magnetostrictive material, and is arranged with the direction in which magnetization is likely to occur (direction of easy magnetization) as the axial direction.
- the magnetostrictive rod 2 has a long flat plate shape, and passes lines of magnetic force in the axial direction thereof.
- the first block body 4 is fixed to the proximal end portion 21, and the second block body 5 is fixed to the distal end portion 22.
- Such a magnetostrictive rod 2 has a substantially constant thickness (cross-sectional area) along the axial direction.
- the average thickness of the magnetostrictive rod 2 is not particularly limited, but is preferably about 0.3 to 10 mm, and more preferably about 0.5 to 5 mm.
- the average cross-sectional area of the magnetostrictive rod 2 is preferably about 0.2 to 200 mm 2 , more preferably about 0.5 to 50 mm 2 . With this configuration, it is possible to reliably pass magnetic lines of force in the axial direction of the magnetostrictive rod 2.
- the Young's modulus of the magnetostrictive material is preferably about 40 to 100 GPa, more preferably about 50 to 90 GPa, and further preferably about 60 to 80 GPa.
- the magnetostrictive rod 2 can be expanded and contracted more greatly. For this reason, since the magnetic permeability of the magnetostrictive rod 2 can be changed more greatly, the electric power generation efficiency of the electric power generating apparatus 1 (coil 3) can be improved more.
- Such a magnetostrictive material is not particularly limited, and examples thereof include an iron-gallium alloy, an iron-cobalt alloy, an iron-nickel alloy, and the like, and one or more of these can be used in combination. .
- a magnetostrictive material mainly composed of an iron-gallium alloy (Young's modulus: about 70 GPa) is preferably used.
- a magnetostrictive material whose main component is an iron-gallium alloy is easy to set in the Young's modulus range as described above.
- the magnetostrictive material as described above preferably contains at least one of rare earth metals such as Y, Pr, Sm, Tb, Dy, Ho, Er, and Tm. Thereby, the change of the magnetic permeability of the magnetostriction stick
- rod 2 can be enlarged more.
- the coil 3 is wound (arranged) on the outer periphery of the magnetostrictive rod 2 so as to surround the portions excluding both end portions 21 and 22 thereof.
- the coil 3 is configured by winding a wire 31 around the magnetostrictive rod 2. Thereby, the coil 3 is arrange
- a voltage is generated in the coil 3 based on a change in magnetic permeability of the magnetostrictive rod 2, that is, a change in the density of magnetic lines of force (magnetic flux density) passing through the magnetostrictive rod 2.
- the magnetostrictive elements 10 and 10 are provided not in the thickness direction but in the width direction, it is possible to design a large distance between them (the distance between the magnetostrictive rods 2 and 2). Therefore, a sufficient space for the coil 3 wound around the magnetostrictive rod 2 can be secured, and the number of turns can be increased even when the wire 31 having a relatively large cross-sectional area (wire diameter) is used.
- a wire rod having a large wire diameter has a small resistance value (load impedance) and can efficiently flow a current, so that the voltage generated in the coil 3 can be used efficiently.
- the voltage ⁇ generated in the coil 3 based on the change in the magnetic flux density of the magnetostrictive rod 2 is expressed by the following equation (1).
- ⁇ N ⁇ ⁇ B / ⁇ T (1) (Where N is the number of turns of the wire 31, ⁇ B is the amount of change in magnetic flux passing through the lumen of the coil 3, and ⁇ T is the amount of change in time.)
- the voltage generated in the coil 3 is proportional to the number of turns of the wire 31 and the amount of change in the magnetic flux density of the magnetostrictive rod 2 ( ⁇ B / ⁇ T).
- the power generation efficiency of 1 can be improved.
- fusion function to the copper base line the wire which coat
- the number of windings of the wire 31 is not particularly limited, but is preferably about 1000 to 10,000, and more preferably about 2000 to 9000. Thereby, the voltage generated in the coil 3 can be further increased.
- the cross-sectional area of the wire 31 is not particularly limited, but is preferably about 5 ⁇ 10 ⁇ 4 to 0.15 mm 2 , and more preferably about 2 ⁇ 10 ⁇ 3 to 0.08 mm 2 . Since the resistance value of such a wire 31 is sufficiently low, the current flowing through the coil 3 can be efficiently flowed to the outside by the generated voltage, and the power generation efficiency of the power generator 1 can be further improved.
- the cross-sectional shape of the wire 31 may be any shape such as a polygon such as a triangle, a square, a rectangle, and a hexagon, a circle, and an ellipse.
- a first block body 4 is provided on the proximal end side of the magnetostrictive rod 2.
- the 1st block body 4 functions as a fixing
- the magnetostrictive rod 2 is cantilevered with the base end as a fixed end and the tip as a movable end.
- various vibrating bodies such as a duct for an air conditioning, are mentioned, for example. A specific example of the vibrating body will be described later.
- the first block body 4 has a high-back portion 41 on the tip side and a low-back portion 42 having a height (thickness) smaller than that of the high-back portion 41.
- the outer shape is stepped (stepped).
- a slit 411 formed along the width direction is provided at the approximate center in the thickness direction of the high-profile portion 41, and the base end portion 21 of the magnetostrictive rod 2 is inserted into the slit 411.
- a pair of female screw portions 412 that penetrates in the thickness direction are provided at both ends in the width direction of the high-profile portion 41.
- a male screw 43 is screwed into each female screw portion 412.
- a pair of female screw portions 421 penetrating in the thickness direction are provided at both ends in the width direction of the low profile portion 42, and male screws 44 are screwed into the respective female screw portions 421.
- the first block body 4 can be fixed to the housing by screwing the male screw 44 into the housing or the like via the female screw portion 421.
- a groove 422 extending in the width direction is formed on the lower surface of the low profile portion 42. Therefore, the first block body 4 is fixed to the vibrating body at two portions, that is, the base end side (the low back portion 42) and the tip end side (mainly the high back portion 41) sandwiching the groove 422. It becomes the structure which is easy to bend. Therefore, the vibration of the vibrating body can be efficiently transmitted to the distal end side (second block body 5) of the magnetostrictive rod 2 via the first block body 4. As a result, it is possible to efficiently apply an extension stress or a contraction stress to the magnetostrictive rod 2.
- a second block body 5 is provided on the distal end side of the magnetostrictive rod 2.
- the second block body 5 is a part that functions as a weight that applies external force or vibration to the magnetostrictive rod 2. Due to the vibration of the vibrating body, an external force or vibration in the vertical direction is applied to the second block body 5. As a result, the magnetostrictive rod 2 has its base end as a fixed end, and the tip reciprocates vertically (the tip is displaced relative to the base end).
- the second block body 5 has a substantially rectangular parallelepiped shape, and a slit formed along the width direction at a substantially central portion in the thickness direction on the base end side thereof. 501 is provided.
- the tip 22 of the magnetostrictive rod 2 is inserted into the slit 501.
- the length from the upper surface of the second block body 5 to the slit 501 is configured to be substantially equal to the length from the upper surface of the high-profile portion 41 of the first block body 4 to the slit 411. ing.
- a pair of female screw portions 502 penetrating in the thickness direction are provided at both end portions in the width direction of the second block body 5, and male screws 53 are screwed into the respective female screw portions 502. To do.
- the end portions 21 and 22 of the magnetostrictive rod 2 can be reliably fixed, respectively, and uniform stress is applied to the magnetostrictive rod 2.
- the material is not particularly limited as long as it is a material having sufficient rigidity capable of imparting a magnetic field and having ferromagnetism capable of imparting a bias magnetic field from the permanent magnet 6 to the magnetostrictive rod 2.
- Examples of the material having the above characteristics include pure iron (for example, JIS SUY), soft iron, carbon steel, electromagnetic steel (silicon steel), high-speed tool steel, structural steel (for example, JIS SS400), stainless steel, permalloy, and the like. These can be used, and one or more of these can be used in combination.
- the widths of the first block body 4 and the second block body 5 are designed to be larger than the width of the magnetostrictive rod 2. Specifically, such a width that the magnetostrictive rod 2 can be disposed between the pair of female screw portions 412 and 502 when the magnetostrictive rod 2 is inserted into the slits 411 and 501 of the block bodies 4 and 5.
- the width of each of the block bodies 4 and 5 is preferably about 3 to 15 mm, and more preferably about 5 to 10 mm.
- two permanent magnets 6 for applying a bias magnetic field to the magnetostrictive rod 2 are provided.
- Each permanent magnet 6 has a cylindrical shape.
- the permanent magnets 6 provided between the first block bodies 4 are arranged with the south pole on the lower side in FIG. 4 and the north pole on the upper side in FIG. Further, the permanent magnet 6 provided between the second block bodies 5 is arranged with the S pole on the upper side in FIG. 4 and the N pole on the lower side in FIG. 4. That is, each permanent magnet 6 is disposed such that the magnetization direction thereof coincides with the direction in which the magnetostrictive element 10 is provided (see FIG. 5 and the like). Thereby, a clockwise magnetic field loop is formed in the power generator 1.
- the permanent magnet 6 for example, an alnico magnet, a ferrite magnet, a neodymium magnet, a samarium cobalt magnet, or a magnet (bond magnet) formed by molding a composite material obtained by pulverizing them and kneading them into a resin material or a rubber material is used. be able to.
- a permanent magnet 6 is preferably fixed to each of the block bodies 4 and 5 by adhesion using, for example, an adhesive.
- the permanent magnet 6 is configured to be displaced together with the second block body 5. Therefore, no friction is generated between the second block body 5 and the permanent magnet 6. For this reason, since the energy for displacing the 2nd block body 5 by friction is not consumed, the electric power generating apparatus 1 can generate electric power efficiently.
- Such magnetostrictive elements 10 and 10 are connected by a connecting portion 7.
- the connecting portion 7 includes a first connecting member 71 that connects the first block bodies 4 of the magnetostrictive elements 10 and 10, a second connecting member 72 that connects the second block bodies 5, and a first connecting member 7.
- One beam member 73 that connects the connecting member 71 and the second connecting member 72 is provided.
- each of the first connecting member 71, the second connecting member 72, and the beam member 73 has a strip shape (a long flat plate shape). It is H-shaped.
- connection part 7 may be the structure which connected each member by welding etc., it is preferable that each member is integrally formed.
- the first connecting member 71 includes four through holes 711 formed at positions corresponding to the four female screw portions 412 provided in the two first block bodies 4.
- the base end portion 21 of the magnetostrictive rod 2 is inserted into the slit 411, and the male screw 43 is inserted into the through hole 711 of the first connecting member 71 and screwed into the female screw portion 412.
- the first connecting member 71 is screwed to the high-back portion 41 (first block body 4) of each magnetostrictive element 10, and the interval between the slits 411 is narrowed, whereby the base end portion 21 (magnetostrictive rod 2). ) Is fixed to the first block body 4.
- the second connecting member 72 includes four through holes 721 formed at positions corresponding to the four female screw portions 502 provided in the two second block bodies 5.
- the distal end portion 22 of the magnetostrictive rod 2 is inserted into the slit 501, and the male screw 53 is inserted into the through hole 721 of the second connecting member 72 and screwed into the female screw portion 502.
- the second connecting member 72 is screwed to the second block body 5 of each magnetostrictive element 10 and the interval between the slits 501 is narrowed, so that the distal end portion 22 (magnetostrictive rod 2) becomes the second block. Fixed to the body 5.
- the magnetostrictive rod 2 and the first connecting member 71 are connected to the first block body 4 by the male screw 43, and the magnetostrictive rod 2 and the second connecting member 72 are connected to the second block body 5 by the male screw 53. Therefore, the number of parts and the number of assembly steps for fixing and connecting the members can be reduced.
- the joining method is not limited to screwing as described above, but may be adhesive bonding, brazing, laser welding, electric welding, or the like.
- the interval between the magnetostrictive rods 2 and 2 can be changed.
- a sufficient space for winding the coil 3 around each magnetostrictive rod 2 can be secured.
- the volume of the coil 3 can be made sufficiently large, and as a result, the power generation efficiency of the power generation device 1 can be improved.
- the beam member 73 connects the central portions of the first connecting member 71 and the second connecting member 72 to each other. And in the electric power generating apparatus 1, it arrange
- the width of the beam member 73 is designed to be smaller than the interval between the coils 3 of the magnetostrictive element 10, and the lower surface of the beam member 73 and the upper surface of the coil 3 substantially coincide with each other in a side view.
- each magnetostrictive rod 2 and the beam member 73 of each magnetostrictive element 10 function as a beam facing each other, and each magnetostrictive rod 2 and the beam member 73 are in the same direction as the second block body 5 is displaced. Displacement (upward or downward in FIG. 1).
- the beam member 73 is disposed between the two magnetostrictive elements 10 and 10, the beam member 73 does not come into contact with each other when each magnetostrictive element 10 is displaced.
- such a power generator 1 has the first block body 4 fixed to the casing 100 of the vibrating body by a male screw 44.
- the second block body 5 is displaced (rotated) downward with respect to the first block body 4 due to the vibration of the vibration body, that is, the distal end with respect to the proximal end of the magnetostrictive rod 2.
- the beam member 73 is deformed to extend in the axial direction, and the magnetostrictive rod 2 is deformed to contract in the axial direction.
- the beam member 73 is contracted in the axial direction.
- the magnetostrictive rod 2 is deformed so as to extend in the axial direction.
- the magnetic permeability of the magnetostrictive rod 2 changes due to the inverse magnetostrictive effect, and the density of magnetic lines of force passing through the magnetostrictive bar 2 (the density of magnetic lines of force penetrating the lumen of the coil 3 in the axial direction) changes.
- a voltage is generated in the coil 3.
- the distance between the magnetostrictive rods 2 and 2 and the beam member 73 (hereinafter also referred to as “beam distance”) in a side view can be freely designed. Specifically, the length (height) from the slits 411 and 501 provided in the respective block bodies 4 and 5 to the upper surface (the upper surface of the high-back portion 41 in the first block body 4) is adjusted. Therefore, these beam intervals can be designed freely.
- the volume of the coil 3 can be sufficiently increased, and the beam spacing between each magnetostrictive rod 2 and the beam member 73 can be freely designed.
- the relationship between the beam interval and the power generation efficiency of the power generation apparatus 1 will be described.
- FIG. 7 is a side view schematically showing a state in which an external force is applied downward to the tip of one bar (one beam) whose base end is fixed to the casing.
- FIG. 8 is a side view schematically showing a state in which an external force is applied downward to the distal ends of a pair of opposed parallel beams (parallel beams) whose base ends are fixed to the casing.
- FIG. 9 is a diagram schematically showing stress (elongation stress, contraction stress) applied to a pair of parallel beams to which an external force is applied to the tip.
- FIGS. 7 to 9 The upper side in FIGS. 7 to 9 is referred to as “upper” or “upper side”, and the lower side in FIGS. 7 to 9 is referred to as “lower” or “lower side”. Further, the left side in FIGS. 7 to 9 is referred to as a “base end”, and the right side in FIGS. 7 to 9 is referred to as a “tip”.
- each beam is deformed into a substantially S shape as shown in FIG. 9 due to a mixture of bending deformation and deformation due to parallel link operation.
- a uniform extension stress is generated in the upper beam.
- the extension stress A is generated in the center as shown in FIG.
- a large shrinkage stress B is generated in the lower part on the side and the upper part on the tip side.
- a uniform shrinkage stress is generated in the lower beam.
- a contraction stress B is generated in the central portion
- a large elongation stress A is generated in the upper portion on the proximal end side and the lower portion on the distal end side. .
- the magnitude of the generated stress (elongation stress or contraction stress) and the amount of change in magnetic flux density have the following relationship.
- FIG. 10 shows an applied magnetic field (H) and magnetic flux density (B) according to the stress generated in a magnetostrictive rod composed of a magnetostrictive material whose main component is an iron-gallium alloy (Young's modulus: about 70 GPa). ).
- FIG. 10A is a state in which no stress is generated in the magnetostrictive rod
- FIG. 10B is a state in which a contraction stress of 90 MPa is generated in the magnetostrictive rod
- FIG. 10C is an extension of 90 MPa in the magnetostrictive rod.
- a state in which stress is generated (d) shows a state in which a 50 MPa contraction stress is generated in the magnetostrictive rod
- the magnetic permeability of the magnetostrictive rod in which elongational stress is generated is higher than that of the magnetostrictive rod in the state where no stress is generated. (Magnetic flux density) increases ((c) and (e)).
- Magnetic flux density increases ((c) and (e)).
- a magnetostrictive rod in which a contraction stress is generated has a lower magnetic permeability, resulting in a lower magnetic flux density passing therethrough ((b) and ( d)).
- the other end is vibrated (displaced) with respect to one end of the magnetostrictive rod, thereby causing the magnetostrictive rod to have an extension stress of 90 MPa and a contraction stress of 90 MPa.
- the amount of change in the magnetic flux density passing through this is about 1 T, and the amount of change is maximized (see (b) and (c)).
- the elongation stress and the contraction stress generated in the magnetostrictive rod are reduced to 50 MPa, the amount of change in the magnetic flux density passing through this is reduced (see (d) and (e)).
- the amount of change in magnetic flux density passing through the magnetostrictive rod is sufficiently increased by alternately generating an extension stress of 70 MPa or more and a contraction stress of 70 MPa or more. be able to.
- the beam spacing between each magnetostrictive rod 2 and the beam member 73 is reduced to suppress the parallel link operation of the beam. It is desirable to approximate the bending deformation behavior of one beam as shown in FIG.
- the volume of the coil 3 is not limited by the beam spacing between each magnetostrictive rod 2 and the beam member 73, so that while the volume of the coil 3 is sufficiently large, The beam spacing can be designed to be sufficiently small. Thereby, it is possible to make the stress generated in the magnetostrictive rod 2 uniform while increasing the volume of the coil 3, and to improve the power generation efficiency of the power generation apparatus 1.
- the connecting portion 7 As a constituent material of the connecting portion 7, a material that prevents a magnetic field loop formed by the magnetostrictive elements 10 and 10 and the permanent magnets 6 and 6 from being short-circuited by the connecting portion 7 (beam member 73) is preferable.
- the connecting portion 7 is preferably made of a weak magnetic material or a nonmagnetic material, but it is more preferably made of a nonmagnetic material from the viewpoint of more reliably preventing a short circuit of the magnetic field loop.
- the spring constant of such a beam member 73 may be different from the spring constant of each magnetostrictive rod 2, but preferably the total of the spring constants of all the magnetostrictive rods 2, that is, the spring constant of the two magnetostrictive rods 2. It is preferable to have a combined value.
- the two magnetostrictive rods 2 and the one beam member 73 function as a pair of opposed beams. Therefore, by using the beam member 73 (the connecting portion 7) that satisfies such conditions, it is possible to make the vertical rigidity uniform between the beam member 73 and the two magnetostrictive rods 2. As a result, the second block body 5 can be smoothly and reliably displaced in the vertical direction with respect to the first block body 4.
- each magnetostrictive rod 2 and the beam member 73 have substantially the same cross-sectional area and cross-sectional shape, their secondary moments are substantially equal. Further, the lengths of the magnetostrictive rods 2 and the beam members 73 are substantially equal. Therefore, according to the above equation (2), in the power generator 1 in which the number of components of the beam member 73 is one and the number of components of the magnetostrictive rod 2 is two, the Young's modulus of the beam member 73 is set to be equal to that of the magnetostrictive rod 2. The Young's modulus is preferably about twice. Thereby, each beam (the beam member 73, the two magnetostrictive rods 2) is similarly deformed (bent) by an external force, in other words, the vertical rigidity of each beam can be balanced.
- the Young's modulus of such a beam member 73 is preferably about 80 to 200 GPa, more preferably about 100 to 190 GPa, and further preferably about 120 to 180 GPa.
- Such a non-magnetic material is not particularly limited, and examples thereof include metal materials, semiconductor materials, ceramic materials, resin materials, and the like, and these can be used alone or in combination.
- a resin material it is preferable to add a filler in a resin material.
- a nonmagnetic material whose main component is a metal material and a nonmagnetic material whose main component is at least one of stainless steel, beryllium copper, aluminum, magnesium, zinc, copper, and alloys containing them. More preferably, a magnetic material is used.
- Such a beam member 73 has a substantially constant thickness (cross-sectional area).
- the average thickness of the beam member 73 is not particularly limited, but is preferably about 0.3 to 10 mm, and more preferably about 0.5 to 5 mm. Further, the average cross-sectional area of the beam member 73 is preferably about 0.2 to 200 mm 2 , and more preferably about 0.5 to 50 mm 2 .
- the air conditioning duct to which the power generator 1 is attached for example, steam, water, fuel oil, gas (air, fuel gas, etc.) is moved (exhaust, ventilation, intake, waste liquid, circulation) through pipes and ducts.
- It is a device and includes air conditioning ducts for large facilities, buildings, stations, and the like.
- the vibrating body to which the power generation device 1 is attached is not limited to such an air conditioning duct, and includes, for example, a transport machine (freight train, automobile, truck bed), rails (sleepers) constituting a track, highways and tunnels. Wall panel, bridge, equipment such as pump and turbine.
- the vibration generated in these vibrators is unnecessary for the movement of the target medium (in the case of an air conditioning duct, the gas passing through the duct), which may cause noise and unpleasant vibration. It has become.
- the unnecessary vibration kinetic energy
- the unnecessary vibration can be converted (regenerated) as electric energy.
- the obtained electrical energy is used as a power source for sensors, wireless devices, etc., and the illuminance, temperature, humidity, pressure, and noise of the facility living space are measured, and the detection data is transmitted by the wireless device for various control signals and monitoring. It can be used as a signal. It can also be used as a system for monitoring the state of each part of the vehicle (for example, a tire air pressure sensor, a seat belt wearing detection sensor). Further, by converting unnecessary vibration into electric power in this way, an effect of reducing noise from the vibrating body and unpleasant vibration can be obtained.
- a structure that directly applies external force to the tip (second block body 5) of the power generation apparatus 1 is added and combined with a radio apparatus.
- Such a switch functions without wiring the power supply and signal lines.
- it is used for a home lighting wireless switch, a home security system (especially a system that wirelessly detects the operation of windows and doors), etc. Can do.
- the power generation device 1 by applying the power generation device 1 to each switch of the vehicle, there is no need for wiring of the power supply and signal line, not only reducing the number of assembly steps, but also reducing the weight required for wiring provided in the vehicle and reducing the weight of the vehicle, etc. Therefore, it is possible to suppress the load on the tire, the vehicle body, and the engine and contribute to safety.
- the magnetostrictive element 10 (coil 3) and the beam member 73 are arranged so as not to overlap with each other in plan view, but a part of the magnetostrictive element 10 overlaps with the beam member 73.
- It may be a configuration. Specifically, the magnetostrictive rod 2 and the beam member 73 do not overlap in plan view, but the end of the coil 3 wound around the magnetostrictive rod 2 and the end of the beam member 73 may overlap. Good. Even in such a configuration, the space between the magnetostrictive rod 2 and the beam member 73 is made sufficiently small within a range where the coil 3 and the beam member 73 are not in contact with each other while ensuring a sufficient winding space for the coil 3.
- the power generation amount of the power generator 1 is not particularly limited, but is preferably about 20 to 2000 ⁇ J. If the power generation amount (power generation capacity) of the power generation device 1 is within the above range, for example, by combining with a wireless device, it can be effectively used for the above-described home illumination wireless switch, home security system, and the like.
- the two magnetostrictive elements 10 and 10 and the one beam member 73 are provided as a beam which opposes, it is not limited to this, It is set as the following structures. You can also.
- FIG. 11 is a plan view illustrating another configuration example of the power generation device according to the first embodiment of the present invention.
- the connecting portion 7 includes two beam members 73 that connect both ends in the longitudinal direction of the first connecting member 71 and the second connecting member 72.
- each beam member 73 is disposed outside the magnetostrictive element 10, the distance between the magnetostrictive elements 10, 10 is reduced while increasing the volume of the coil 3, and the width of the power generator 1.
- the size of the direction (vertical direction in FIG. 11) can be reduced. Even with such a configuration, the same effects as those of the above-described embodiment can be obtained.
- the power generation device 1 can take a configuration including two or more magnetostrictive elements 10 and one or more beam members 73.
- the total number of the magnetostrictive element 10 and the beam member 73 it is preferable that the total number becomes an odd number.
- the number of magnetostrictive elements 10: the number of beam members 73 is 2: 3, 3: 2, 3: 4, 4: 3, 4: 5, and the like.
- the magnetostrictive rod 2 functioning as a beam and the beam member 73 are arranged symmetrically in the width direction of the power generator, the stress applied to the magnetostrictive rod 2, the block bodies 4, 5, and the connecting portion 7 is reduced. Balance becomes good.
- the sum of Young's moduli of materials (weak magnetic material or nonmagnetic material) constituting all beam members 73 is the sum of Young's moduli of magnetostrictive materials constituting all magnetostrictive rods 2. It is preferable that they are approximately equal. As a result, the second block body 5 can be smoothly and reliably displaced in the vertical direction with respect to the first block body 4.
- the spring constant of the beam member 73 is A [N / m]
- the number of the beam members 73 is X [lines]
- the spring constant of the magnetostrictive rod 2 is B [N / m].
- the value of A ⁇ X and the value of B ⁇ Y are preferably substantially equal.
- each member is not limited to the above method.
- each member may be fixed and connected by a method such as press fitting of a pin, welding, or adhesion using an adhesive.
- FIG. 12 is a perspective view showing a second embodiment of the power generator of the present invention.
- Fig.13 (a) is a side view of the electric power generating apparatus shown in FIG.
- FIG.13 (b) is a figure which shows the state which removed the coil from each magnetostriction element shown to Fig.13 (a).
- FIG. 14A is an analysis diagram in which the stress generated in the magnetostrictive rod and the beam member of the power generation apparatus according to the first embodiment shown in FIG. 1 is analyzed.
- FIG. 14B is an analysis diagram in which stress generated in the magnetostrictive rod and the beam member of the power generation apparatus of the present embodiment shown in FIG. 12 is analyzed.
- FIGS. 12, 13A and 14B and FIGS. 14A and 14B are referred to as “upper” or “upper”, and FIGS. ), (B) and the lower side in FIGS. 14A and 14B are referred to as “lower” or “lower”.
- the right rear side in FIG. 12 and the right side in FIGS. 13A, 13B and 14A, 14B are referred to as “tip”, and the left front side in FIG. 12 and FIG.
- the left side in FIGS. 14A and 14B and FIGS. 14A and 14B is referred to as “base end”.
- the power generation device of the second embodiment will be described with a focus on differences from the power generation device of the first embodiment, and description of similar matters will be omitted.
- the shapes of the first block body 4 and the second block body 5 are different, and other than that is the same as the power generation device 1 of the first embodiment.
- the first block body 4 has a substantially rectangular parallelepiped shape, and has a stepped shape so that the distal end side is two steps lower than the proximal end side ( A stepped portion 45 formed in a stepped shape is formed.
- the stepped portion 45 has a first stepped surface 451 on which the proximal end portion 21 of the magnetostrictive rod 2 is placed on the distal end side and one step on the proximal end side from the first stepped surface 451 than the first stepped surface 451. And a second step surface 452 on which a part of the first connecting member 71 is placed.
- the step portion 45 is formed with a pair of female screw portions 453 penetrating in the thickness direction in the vicinity of both ends in the width direction of the first step surface 451, and is screwed into the two male screws 43. It is configured as follows.
- the first block body 4 is formed with a female screw portion 421 and a groove 422 on the base end side in the same manner as the first block body 4 included in the power generation device 1 of the first embodiment.
- the female screw portion 421 is inserted and the male screw 44 is screwed into the housing or the like to fix the first block body 4 to the housing.
- the second block body 5 has a substantially rectangular parallelepiped shape like the first block body 4, and has a stepped shape (stepped shape) so that the base end side is two steps lower than the distal end side.
- the formed step portion 55 is formed.
- the stepped portion 55 has a first stepped surface 551 on which the distal end portion 22 of the magnetostrictive rod 2 is placed on the proximal end side and a step higher than the first stepped surface 551 on the distal end side from the first stepped surface 551. And a second step surface 552 on which a part of the second connecting member 72 is placed.
- the stepped portion 55 is formed with a pair of female screw portions 553 penetrating in the thickness direction near both ends in the width direction of the first stepped surface 551, and is screwed into the two male screws 53. It is configured as follows.
- the base end portion 21 of the magnetostrictive rod 2 is placed on the first step surface 451 of the first block body 4, and the base end portion of the first connecting member 71 is the second end.
- the male screw 43 is inserted into the through-hole 711 in a state of being in contact with the stepped surface 452 and is screwed into the female screw portion 453.
- the first connecting member 71 is screwed to the first block body 4 of each magnetostrictive element 10, and the base end is between the bottom surface of the first connecting member 71 and the first step surface 451.
- the magnetostrictive rod 2 is fixed to the first block body 4 by holding the portion 21. Thereby, fixation with the magnetostriction stick
- the distal end portion 22 of the magnetostrictive rod 2 is placed on the first step surface 551 of the second block body 5 and the proximal end of the second connecting member 72 in the same manner as the proximal end side. Is in contact with the second step surface 552, and the male screw 53 is inserted into the through hole 711 and screwed into the female screw portion 553.
- the second connecting member 72 is screwed to the second block body 5 of each magnetostrictive element 10, and the tip portion is provided between the bottom surface of the second connecting member 72 and the first step surface 551.
- the magnetostrictive rod 2 is fixed to the second block body 5. Thereby, the fixation of the magnetostrictive rod 2 and the second block body 5 and the connection between the second connecting member 72 and the two second block bodies 5 can be performed.
- the magnetostrictive rod 2, the first block body 4, the second block body 5 and the connecting portion 7 of each magnetostrictive element 10 are fixed and connected as described above.
- the upper surface of the magnetostrictive rod 2 and the lower surface of the beam member 73 substantially coincide.
- the magnetostrictive rod 2 and the beam member 73 are arranged.
- 73 is a deformation close to the bending deformation of one beam as shown in FIG.
- the magnetostrictive rod 2 as described above can generate a uniform stress on the entire surface and can be largely deformed only by applying a relatively small external force.
- the magnetostrictive rod 2 is wound around the magnetostrictive rod 2 by increasing the gap between the magnetostrictive rods 2 and 2.
- the volume of the rotating coil can be increased.
- FIGS. 14A and 14B show the stress generated in the magnetostrictive rod 2 when an external force is applied to the power generation device 1 of the first embodiment and each tip of the power generation device 1 of the present embodiment.
- the description will be given with reference.
- the black-painted portion indicates elongation stress
- the white-painted portion indicates contraction stress.
- the power generation device 1 according to the second embodiment produces the same operations and effects as those of the power generation device 1 according to the first embodiment.
- FIG. 15 is a perspective view showing a third embodiment of the power generator of the present invention.
- 16 is an exploded perspective view of the power generation device shown in FIG.
- FIG. 17A is a right side view of the power generation device shown in FIG.
- FIG. 17B is a diagram showing a state where the coil is removed from each magnetostrictive element shown in FIG. 18 is a front view of the power generation device shown in FIG. Fig.19 (a) is a right view which shows the state which attached the electric power generating apparatus (a coil is abbreviate
- FIG.19 (b) is a figure which shows the state which provided the external force to the downward direction with respect to the front-end
- FIG. 20 is an analysis diagram in which the stress generated in the magnetostrictive rod and the beam member of the power generator according to the third embodiment shown in FIG. 15 is analyzed.
- FIG. 15 and 16 and the right side in FIGS. 17A, 17B, 19A, 19B, and 20 are referred to as "tip”, and FIG. 15 and FIG. 16 and the left side in FIGS. 17 (a), 17 (b), 19 (a), 19 (b), and 20 are referred to as “base ends”.
- the power generation device of the third embodiment will be described focusing on the differences from the power generation devices of the first and second embodiments, and description of similar matters will be omitted.
- the second block body 5 included in the power generation device 1 of the second embodiment is used as the second block body 5, so that the beam member 73 of the connecting portion 7 is distal to the distal end.
- the other configurations are the same as those of the power generation apparatus 1 of the first embodiment.
- the second block body 5 included in the power generation device 1 of the second embodiment is used as the second block body 5. Therefore, as shown in FIGS. 17A and 17B, the position of the first connecting member 71 connected to the first block body 4 is the second position connected to the second block body 5. It becomes higher than the arrangement position of the connecting member 72.
- the same connecting portion 7 as that in the first embodiment is prepared, and the first connecting member 71 and the first connecting member 71 are connected to the beam member 73 by, for example, pressing, bending, or forging. It can be formed by bending the two connecting members 72 in opposite directions. By using such a method, the angle formed between the first connecting member 71 and the beam member 73 and the angle formed between the second connecting member 72 and the beam member 73 can be easily adjusted.
- the beam interval between the magnetostrictive rod 2 and the beam member 73 is configured to decrease from the proximal end side toward the distal end side.
- the magnetostrictive rod 2 and the beam member 73 have a beam structure (taper beam structure) in which a taper is applied from the proximal end side to the distal end side (see FIG. 17B).
- the pair of beams composed of the magnetostrictive rod 2 and the beam member 73 has a lower rigidity in the displacement direction (vertical direction) from the proximal end side toward the distal end side.
- the magnetostrictive rod 2 and the beam member 73 can be displaced smoothly in the vertical direction (FIGS. 19A and 19B). As a result, the variation in the thickness direction of the stress generated in the magnetostrictive rod 2 can be further reduced.
- the height of the high back portion 41 of the first block body 4 is designed to be low, and the length from the upper surface of the high back portion 41 to the slit 411 is shortened, so that the magnetostriction in the side view is obtained.
- the distance on the base end side between the rod 2 and the beam member 73 (the beam distance on the base end side) can be reduced.
- the beam distance between the magnetostrictive rod 2 and the beam member 73 is small, when an external force is applied to the tip (second block body 5), the entire magnetostrictive rod 2 is applied. Uniform stress can be generated.
- the power generation device 1 of the present embodiment uniform stress is applied in both the longitudinal direction and the thickness direction of the magnetostrictive rod 2 by designing the gap between the proximal ends of the tapered beam structure to be small. Can be reliably generated (see FIG. 20).
- the pair of beams including the magnetostrictive rod 2 and the beam member 73 has a lower rigidity in the displacement direction from the proximal end side toward the distal end side, the power generator according to the second embodiment. Similar to 1, the magnetostrictive rod 2 can be greatly deformed in the vertical direction with a relatively small external force.
- the power generation efficiency of the power generator 1 can be further improved.
- the angle (taper angle) formed by the magnetostrictive rod 2 and the beam member 73 in side view is not particularly limited, but is preferably about 0.5 to 10 °, and preferably about 1 to 7 °. More preferred. If the angle formed by the magnetostrictive rod 2 and the beam member 73 is within the above range, the magnetostrictive rod 2 and the beam member 73 on the proximal end side constitute the tapered beam structure with the magnetostrictive rod 2 and the beam member 73. Can be made sufficiently small. Thereby, a more uniform stress can be generated in both the longitudinal direction and the thickness direction of the magnetostrictive rod 2.
- an initial load (bias stress) may be applied to the magnetostrictive rod 2 by the beam member 73.
- the magnetostrictive rod 2 is given an extensional stress in a natural state.
- the magnetostrictive rod 2 is displaced upwardly more than when no bias stress is applied.
- the elongation stress generated in the magnetostrictive rod 2 can be further increased, and the power generation efficiency of the power generation apparatus 1 can be further improved.
- the magnetostrictive rod 2 is given a contraction stress in a natural state.
- the magnetostrictive rod 2 is displaced more downward than when no bias stress is applied.
- rod 2 can be enlarged more, and the electric power generation efficiency of the electric power generating apparatus 1 can further be improved.
- the power generator 1 according to the third embodiment also produces the same operations and effects as those of the power generator 1 according to the first and second embodiments.
- FIG. 21 is a perspective view showing a fourth embodiment of the power generator of the present invention.
- 22 (a) and 22 (b) are perspective views showing a bobbin of a coil provided in the power generator shown in FIG.
- FIG. 23A and FIG. 23B are perspective views showing a magnetostrictive rod and a coil included in the power generator shown in FIG.
- FIG. 23 (c) is a perspective view showing a cross section of the magnetostrictive rod and coil of FIG. 23 (a) cut along line BB.
- Fig.24 (a) is a side view for demonstrating the state which attached the electric power generating apparatus shown in FIG. 21 to the vibrating body.
- FIG. 24B is a longitudinal sectional view (a sectional view taken along line AA in FIG. 21) of the power generation device shown in FIG. 21 attached to the vibrating body.
- FIG. 21 the upper side in FIG. 21, FIG. 22 (a), (b), FIG. 23 (a), (b), (c) and FIG.
- it is referred to as “upper”
- the lower side in FIGS. 21, 22 (a), (b), 23 (a), (b), (c) and FIGS. 24 (a), (b) is referred to as “lower”.
- “downward”. 21 and the right side in FIGS. 24A and 24B are referred to as “tips”.
- 21 and the left side in FIGS. 24A and 24B are referred to as “base ends”.
- FIG. 22A the bobbin tip side is shown to be the right front side of the drawing.
- FIG. 22A the bobbin tip side is shown to be the right front side of the drawing.
- the base end side of the bobbin is shown to be the front right side of the drawing.
- the magnetostrictive rod and the front end side of the coil are shown to be the front right side of the drawing.
- the base end side of the magnetostrictive rod and the coil is shown to be the right front side of the paper.
- the power generation device of the fourth embodiment will be described focusing on the differences from the power generation devices of the first, second, and third embodiments, and description of similar matters will be omitted.
- the configuration of the coil 3 is different, and the other configuration is the same as that of the power generation device 1 of the first embodiment. That is, in the power generator 1 of the present embodiment, the coil 3 is configured by the bobbin 32 disposed so as to surround the magnetostrictive rod 2 on the outer peripheral side of the magnetostrictive rod 2 and the wire 31 wound around the bobbin 32. Has been.
- the bobbin 32 includes a long main body 33 around which the wire 31 is wound, and a first flange 34 connected to the base end of the main body 33. And a second flange 35 that is connected to the tip of the main body 33.
- the bobbin 32 may have a configuration in which the members are connected by welding or the like, but it is preferable that the members are integrally formed.
- the main body 33 includes a pair of long side plate portions 331 and 332, and a base plate side, a top plate portion 333 that connects upper end portions of the pair of side plate portions 331 and 332, and a bottom plate portion that connects lower end portions. 334.
- each of the side plate portions 331 and 332, the upper plate portion 333, and the bottom plate portion 334 constituting the main body portion 33 has a flat plate shape.
- the main body portion 33 has a square cylindrical portion defined by a pair of side plate portions 331, 332, an upper plate portion 333, and a bottom plate portion 334 on the base end side thereof.
- the magnetostrictive rod 2 is inserted inside.
- the distance between the pair of side plate portions 331 and 332 is designed to be larger than the width of the magnetostrictive rod 2, and the magnetostrictive rod 2 is disposed between the pair of side plate portions 331 and 332 while being spaced apart from each other. . Further, the interval between the upper plate portion 333 and the bottom plate portion 334 is configured to be substantially equal to the thickness of the magnetostrictive rod 2.
- the magnetostrictive rod 2 is inserted between the upper plate portion 333 and the bottom plate portion 334, whereby a part of the base end side of the magnetostrictive rod 2 is held between the upper plate portion 333 and the bottom plate portion 334 ( (Refer FIG.23 (c)).
- the wire 31 is wound around the outer periphery of the main body 33 from the proximal end to the distal end.
- a flat plate-like first flange portion 34 that is connected to the main body portion 33 (the side plate portions 331 and 332, the upper plate portion 333 and the bottom plate portion 334) is provided (FIG. 22 ( b)).
- the 1st collar part 34 has comprised the substantially elliptical shape.
- the first flange 34 is formed with a slit 341 through which the magnetostrictive rod 2 is inserted at a position where it is connected to the main body 33.
- the shape of the slit 341 is formed to be substantially equal to the cross-sectional shape of the magnetostrictive rod 2.
- the lower end portion 342 of the first flange portion 34 is configured to contact the vibrating body 100 when the power generation device 1 is attached to the vibrating body 100.
- the first flange 34 is provided with a protrusion 36 that protrudes in the proximal direction from the first flange 34 at a position below the slit 341.
- the portion above the protrusion 36 of the first flange 34 is in contact with the surface on the tip side of the first block body 4 (high profile portion 41), and the protrusion 36 is the first.
- the bobbin 32 is attached to the magnetostrictive element 10 so as to be in contact with the bottom surface of the block body 4. Two grooves 361 formed along the width direction of the protrusion 36 are formed on the lower surface of the protrusion 36.
- each groove 361 of the power generation apparatus 1 is fitted to the corresponding protrusion of the vibration body 100. Therefore, the power generation apparatus 1 can be easily installed at a predetermined position of the vibrating body 100. That is, positioning of the power generator 1 is facilitated.
- a flat plate-like second collar portion 35 that is connected to the main body portion 33 (side plate portions 331 and 332) is provided on the distal end side of the main body portion 33 (see FIG. 22A).
- the 2nd collar part 35 has comprised the substantially elliptical shape.
- the second flange 35 is formed with a substantially rectangular opening 351 through which the magnetostrictive rod 2 is inserted at a position where the main body 33 (side plate portions 331 and 332) is connected.
- the width of the opening 351 is substantially equal to the distance between the pair of side plate portions 331 and 332, and the distance from the upper end to the lower end of the opening 351 is substantially equal to the length of each side plate portion 331 in the short direction.
- the lower end portion 352 of the second flange portion 35 is configured to contact the vibrating body 100 when the power generation device 1 is attached to the vibrating body 100. Further, the lower end portion 352 is formed with two projecting portions 353 projecting in the distal direction from both end portions in the width direction. The lower end portion 352 and the projection portion 353 support the bobbin 32 with respect to the vibrating body 100 together with the lower end portion 342 of the first flange portion 34. The second flange 35 is separated from the second block body 5 in a state where the bobbin 32 is attached to the magnetostrictive element 10.
- the magnetostrictive rod 2 and the bobbin 32 or the wire 31 in the displacement (vibration) direction of the magnetostrictive rod 2 (vertical direction in FIG. 24B).
- a gap is formed between the center of the bobbin 32 and the tip.
- This gap is designed to have a size that does not cause interference between the magnetostrictive rod 2 and the bobbin 32 or the wire 31 when the magnetostrictive rod 2 is displaced by the vibration of the vibrating body 100, that is, a size larger than the amplitude of the magnetostrictive rod 2. ing. Therefore, the magnetostrictive rod 2 can vibrate without contacting the coil 3 (the wire 31 and the bobbin 32). With this configuration, it is possible to prevent energy loss due to friction between the magnetostrictive rod 2 and the coil 3.
- the coil 3 (the wire 31 and the bobbin 32) is not deformed along with the deformation.
- a wire rod or bobbin constituting a coil is a member having a large amount of energy loss due to its deformation, that is, a large loss factor. Therefore, in the power generation device 1 of the present embodiment, energy loss (structural attenuation) due to deformation of the wire 31 and the bobbin 32 of the coil 3 having a large loss coefficient is prevented. Further, in the power generation apparatus 1, the coil 3 having a large mass is not displaced accompanying the vibration of the magnetostrictive rod 2.
- the mass of the coil 3 is not included as the mass of the vibration system that vibrates the magnetostrictive rod 2. Therefore, in the power generation device 1, it is possible to prevent a decrease in the vibration frequency of the magnetostrictive rod 2 (vibration system) as compared with a power generation device in which the coil is displaced together with the magnetostrictive rod. Thereby, it can prevent that the variation
- the power generation device 1 it is possible to prevent energy loss due to friction between the magnetostrictive rod 2 and the coil 3 and energy loss due to deformation of the coil 3 having a large loss coefficient. Furthermore, it is possible to prevent a decrease in vibration frequency due to the displacement of the coil 3 having a large mass. Thereby, the vibration of the vibrating body 100 can be efficiently used for the deformation of the magnetostrictive rod 2 (magnetostrictive element 10), and as a result, the power generation efficiency of the power generation apparatus 1 can be improved.
- the size of the gap formed in the bobbin 32 changes the length in the short direction of the pair of side plate portions 331 and 332, and changes the distance from the upper end to the lower end of the opening 351 in accordance with this change. Therefore, it can be set freely.
- the material similar to the constituent material of the connection part 7 can be used, for example.
- the power generation device 1 according to the fourth embodiment also produces the same operations and effects as the power generation devices 1 according to the first, second, and third embodiments.
- the arbitrary configurations of the first to fourth embodiments can be combined.
- One of the two permanent magnets can be omitted, and one or both of the permanent magnets can be replaced with an electromagnet.
- the power generation device of the present invention may be configured to generate power using an external magnetic field (external magnetic field), omitting both permanent magnets.
- the magnetostrictive rod and the beam member both have a rectangular cross-sectional shape, such as a circular shape, an elliptical shape, a triangular shape, a square shape, or a hexagonal shape. It may be a polygonal shape.
- the permanent magnets of the above embodiments are all cylindrical, but may be prismatic, flat, or triangular.
- the power generator 1 of each example shown below has a length of 21.65 mm, a width of 3 mm, and a thickness of 0.5 mm, excluding both end portions 21 and 22 of the magnetostrictive rod 2, and a beam member. 73 had a width of 3 mm and a thickness of 0.5 mm.
- Example 1 A power generator 1 (see FIG. 1) having the configuration shown in FIG. 1 was prepared.
- the distance between the magnetostrictive rod 2 and the beam member 73 (the distance between the upper surface of the magnetostrictive rod 2 and the lower surface of the beam member 73 in a side view) was 2.0 mm.
- Example 2 A power generator 1 (see FIG. 12) having the configuration shown in FIG. 12 was prepared.
- the beam interval between the magnetostrictive rod 2 and the beam member 73 was 0 mm.
- Example 3 A power generator 1 (see FIG. 15) having the configuration shown in FIG. 15 was prepared.
- the beam spacing between the magnetostrictive rod 2 and the beam member 73 at the proximal end and the distal end is set to 2.0 mm and 0 mm, respectively, and the angle (taper angle) formed by the magnetostrictive rod 2 and the beam member 73 is set. ) was designed to be about 2.7 °.
- Example 4 A power generator 1 (see FIG. 25) having the configuration shown in FIG. 25 was prepared.
- this power generator 1 the beam spacing between the magnetostrictive rod 2 and the beam member 73 at the proximal end and the distal end is set to 1.0 mm and 0 mm, respectively, and the angle (taper angle) formed by the magnetostrictive rod 2 and the beam member 73 is set. ) was designed to be about 1 °.
- Stress distribution evaluation For each of the above examples, the stress generated in the thickness direction and the longitudinal direction of the magnetostrictive rod 2 when an external force was applied to the tip (second block body 5) was measured. The magnitude of the external force applied to the second block body 5 was 20N.
- 26 (a) to (d) are graphs showing the stress along the longitudinal direction in each region in the thickness direction of the magnetostrictive rod 2 for the power generators 1 of Examples 1 to 4, respectively.
- a positive value stress indicates an elongation stress
- a negative value stress indicates a contraction stress.
- Example 2 From a comparison between Example 1 and Example 2, it can be seen that the stress (average stress) generated in the magnetostrictive rod 2 becomes larger when the beam spacing between the magnetostrictive rod 2 and the beam member 73 is smaller.
- Example 3 From comparison between Example 1 and Example 3, it can be seen that when the magnetostrictive rod 2 and the beam member 73 have a tapered beam structure, the stress variation in the thickness direction of the magnetostrictive rod 2 is reduced.
- each of the power generation devices 1 of the third and fourth embodiments having a tapered beam structure is higher than each of the power generation devices 1 of the first and second embodiments having a parallel beam structure, and in particular, the power generation device 1 of the fourth embodiment.
- the power generation efficiency tends to be high.
- the interval between the magnetostrictive rods can be arbitrarily set. For this reason, by enlarging the space
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Abstract
Description
(1) 併設された少なくとも2つの磁歪素子と、
前記磁歪素子の一端側同士を連結する第1の連結部材と、前記磁歪素子の他端側同士を連結する第2の連結部材と、前記第1の連結部材と前記第2の連結部材とを連結する少なくとも1つの梁部材とを備える連結部とを有し、
各前記磁歪素子は、磁歪材料で構成され、軸方向に磁力線を通過させる磁歪棒と、該磁歪棒の外周に巻回されたコイルとを備え、一端に対して他端を、前記磁歪棒の軸方向とほぼ垂直な方向に相対的に変位させて前記磁歪棒を伸縮させることにより、前記磁力線の密度を変化させて前記コイルに電圧を発生するように構成され、
平面視において、各前記磁歪素子の前記磁歪棒と前記梁部材とが重ならないよう配置されていることを特徴とする発電装置。
前記磁歪棒と前記ボビンとの間には、少なくとも前記磁歪棒の前記他端側において空隙が形成されている上記(1)ないし(5)のいずれかに記載の発電装置。
前記第1の連結部材が前記第1のブロック体にネジ止めされ、前記第2の連結部材が前記第2のブロック体にネジ止めされる上記(1)ないし(12)のいずれかに記載の発電装置。
前記収容部は、前記磁歪棒の前記端部を挿入するスリットで構成されている上記(13)に記載の発電装置。
前記収容部は、前記磁歪棒の前記端部を載置する段差部で構成されている上記(13)または(14)に記載の発電装置。
該永久磁石は、前記磁歪素子の前記第1のブロック体同士の間および前記磁歪素子の前記第2のブロック体同士の間の少なくとも一方に配置されている上記(13)ないし(15)のいずれかに記載の発電装置。
<第1実施形態>
まず、本発明の発電装置の第1実施形態について説明する。
<<磁歪素子10>>
磁歪素子10は、磁歪材料で構成され、軸方向に磁力線を通過させる磁歪棒2と、磁歪棒2の外周に巻回されたコイル3と、磁歪棒2の基端側に設けられた第1のブロック体4と、磁歪棒2の他端側に設けられた第2のブロック体5とを備えている。
(磁歪棒2)
磁歪棒2は、磁歪材料で構成され、磁化が生じ易い方向(磁化容易方向)を軸方向として配置されている。本実施形態では、この磁歪棒2は、長尺の平板状をなしており、その軸方向に磁力線を通過させる。
コイル3は、線材31を磁歪棒2の外周に巻回することにより構成されている。これにより、コイル3は、磁歪棒2を通過している磁力線が、その軸方向に通過する(内腔部を貫く)ように配設されている。このコイル3には、磁歪棒2の透磁率の変化、すなわち、磁歪棒2を通過する磁力線の密度(磁束密度)の変化に基づいて、電圧が発生する。
ε=N×ΔB/ΔT (1)
(ただし、Nは線材31の巻き数、ΔBはコイル3の内腔部を通過する磁束の変化量、ΔTは時間の変化量を表す。)
磁歪棒2の基端側には、第1のブロック体4が設けられている。
第1のブロック体4は、発電装置1を、振動を発生する振動体に固定するための固定部として機能する。第1のブロック体4を介して発電装置1を固定することにより、磁歪棒2は、その基端を固定端、先端を可動端として片持ち支持されている。なお、第1のブロック体4を取り付ける振動体としては、例えば、空調用ダクト等の各種振動体が挙げられる。振動体の具体例については、後述する。
一方、磁歪棒2の先端側には、第2のブロック体5が設けられている。
第2のブロック体5は、磁歪棒2に対して外力や振動を付与する錘として機能する部位である。振動体の振動により、第2のブロック体5に対して、上下方向への外力または振動が付与される。これにより、磁歪棒2は、その基端を固定端とし、先端が上下方向に往復動(先端が基端に対して相対的に変位)する。
各永久磁石6は、円柱状をなしている。
このような磁歪素子10、10は、連結部7により連結されている。
連結部7は、磁歪素子10、10の第1のブロック体4同士を連結する第1の連結部材71と、第2のブロック体5同士を連結する第2の連結部材72と、第1の連結部材71と第2の連結部材72とを連結する1つの梁部材73とを備えている。
d=FL3/3EI (2)
(ただし、Lは梁の長さ、Eは梁の構成材料のヤング率、Iは梁の断面2次モーメントを表す。)
なお、発電装置1の発電量は、特に限定されないが、20~2000μJ程度であるのが好ましい。発電装置1の発電量(発電能力)が上記範囲内であれば、例えば、無線装置と組み合わせることで、上述した住宅照明用無線スイッチや住宅セキュリティー用システム等に有効に利用することができる。
図11に示す発電装置1では、連結部7が、第1の連結部材71および第2の連結部材72の長手方向の両端部同士を連結する2つの梁部材73を備えている。かかる構成では、各梁部材73が、磁歪素子10の外側に配置されているため、コイル3の体積を増大させつつも、磁歪素子10、10同士の間隔を小さくして、発電装置1の幅方向(図11中、上下方向)のサイズを小さくすることができる。なお、かかる構成でも、上述した本実施形態と同様の効果を得ることができる。
次に、本発明の発電装置の第2実施形態について説明する。
(第1のブロック体4、第2のブロック体5)
図12および図13(a),(b)に示すように、第1のブロック体4は、略直方体状をなしており、先端側に基端側よりも2段低くなるように階段状(段差状)に形成された段差部45が形成されている。段差部45は、先端側に磁歪棒2の基端部21が載置される第1の段差面451と、第1の段差面451より基端側に第1の段差面451よりも1段高く設けられ、第1の連結部材71の一部が載置される第2の段差面452とを有している。
以上のような理由から、発電装置1の発電効率をさらに優れたものとすることができる。
次に、本発明の発電装置の第3実施形態について説明する。
図15は、本発明の発電装置の第3実施形態を示す斜視図である。図16は、図15に示す発電装置の分解斜視図である。図17(a)は、図15に示す発電装置の右側面図である。図17(b)は、図17(a)に示す各磁歪素子からコイルを取り除いた状態を示す図である。図18は、図15に示す発電装置の正面図である。図19(a)は、図15に示す発電装置(コイルは省略)を振動体に取り付けた状態を示す右側面図である。図19(b)は、図19(a)に示す発電装置の先端に対して、下方向に外力を付与した状態を示す図である。図20は、図15に示す第3実施形態の発電装置の磁歪棒と梁部材とに発生する応力を解析した解析図である。
以上のような理由から、発電装置1の発電効率をさらに優れたものとすることができる。
次に、本発明の発電装置の第4実施形態について説明する。
図21は、本発明の発電装置の第4実施形態を示す斜視図である。図22(a)および図22(b)は、図21に示す発電装置が備えるコイルのボビンを示す斜視図である。図23(a)および図23(b)は、図21に示す発電装置が備える磁歪棒およびコイルを示す斜視図である。図23(c)は、図23(a)の磁歪棒およびコイルをB-B線で切断した断面を示す斜視図である。図24(a)は、図21に示す発電装置を振動体に取り付けた状態を説明するための側面図である。図24(b)は、振動体に取り付けた図21に示す発電装置の縦断面図(図21中のA-A線断面図)である。
また、図22(a)では、ボビンの先端側が紙面右手前側となるように示されている。また、図22(b)では、ボビンの基端側が紙面右手前側となるように示されている。また、図23(a),(c)では、磁歪棒およびコイルの先端側が紙面右手前側となるように示されている。また、図23(b)では、磁歪棒およびコイルの基端側が紙面右手前側となるように示されている。
この本体部33は、その基端側に、一対の側板部331、332、上板部333および底板部334で規定される四角筒状の部分を有しており、この四角筒状の部分の内側に磁歪棒2が挿通される。
この本体部33の外周に、その基端から先端にわたって線材31が巻回される。
第1の鍔部34は、略楕円形状をなしている。この第1の鍔部34には、本体部33と連結する位置に、磁歪棒2が挿通されるスリット341が形成されている。このスリット341の形状は、磁歪棒2の横断面形状と略等しくなるように形成されている。
また、第1の鍔部34の下端部342は、発電装置1を振動体100に取り付ける際に、振動体100に当接するように構成されている。
第2の鍔部35は、略楕円形状をなしている。この第2の鍔部35には、本体部33(側板部331、332)が連結する位置に、磁歪棒2が挿通される略四角形状の開口部351が形成されている。この開口部351の幅は、一対の側板部331、332同士の間隔と略等しく、また、開口部351の上端から下端までの距離は、各側板部331の短手方向の長さと略等しくなるように設計されている。
この第2の鍔部35は、ボビン32が磁歪素子10に取り付けられた状態において、第2のブロック体5と離間している。
このように、発電装置1では、磁歪棒2とコイル3との間の摩擦によるエネルギーロス、および損失係数が大きいコイル3が変形することによるエネルギーロスの発生を防止することができる。さらに、質量が大きいコイル3が変位することによる振動周波数の低下を防止することができる。これにより、振動体100の振動を効率良く磁歪棒2(磁歪素子10)の変形に用いることができ、その結果、発電装置1の発電効率を向上させることができる。
なお、ボビン32の構成材料としては、例えば、連結部7の構成材料と同様の材料を用いることができる。
かかる第4実施形態の発電装置1によっても、前記第1、第2および第3実施形態の発電装置1と同様の作用・効果を生じる。
また、2つの永久磁石のうち一方を省略することもでき、永久磁石の一方または双方を電磁石に置き換えることもできる。さらに、本発明の発電装置は、双方の永久磁石を省略し、外部磁場(外部磁界)を用いて発電する構成とすることもできる。
図1に示す構成の発電装置1(図1参照)を用意した。なお、磁歪棒2と梁部材73との梁間隔(側面視における磁歪棒2の上面と梁部材73の下面との距離)は2.0mmであった。
図12に示す構成の発電装置1(図12参照)を用意した。なお、磁歪棒2と梁部材73との梁間隔は、0mmであった。
図15に示す構成の発電装置1(図15参照)を用意した。この発電装置1では、基端および先端における磁歪棒2と梁部材73との梁間隔を、それぞれ、2.0mm、0mmに設定して、磁歪棒2と梁部材73とのなす角度(テーパー角度)が約2.7°となるように設計した。
図25に示す構成の発電装置1(図25参照)を用意した。この発電装置1では、基端および先端における磁歪棒2と梁部材73との梁間隔を、それぞれ、1.0mm、0mmに設定して、磁歪棒2と梁部材73とのなす角度(テーパー角度)が約1°となるように設計した。
以上の各実施例について、その先端(第2のブロック体5)に対して外力を付与した際に磁歪棒2の厚さ方向および長手方向に発生する応力を測定した。なお、第2のブロック体5に対して付与する外力の大きさは20Nとした。
Claims (17)
- 併設された少なくとも2つの磁歪素子と、
前記磁歪素子の一端側同士を連結する第1の連結部材と、前記磁歪素子の他端側同士を連結する第2の連結部材と、前記第1の連結部材と前記第2の連結部材とを連結する少なくとも1つの梁部材とを備える連結部とを有し、
各前記磁歪素子は、磁歪材料で構成され、軸方向に磁力線を通過させる磁歪棒と、該磁歪棒の外周に巻回されたコイルとを備え、一端に対して他端を、前記磁歪棒の軸方向とほぼ垂直な方向に相対的に変位させて前記磁歪棒を伸縮させることにより、前記磁力線の密度を変化させて前記コイルに電圧を発生するように構成され、
平面視において、各前記磁歪素子の前記磁歪棒と前記梁部材とが重ならないよう配置されていることを特徴とする発電装置。 - 平面視において、各前記磁歪素子の前記コイルと前記梁部材とが重ならないよう配置されている請求項1に記載の発電装置。
- 平面視において、前記梁部材は、前記磁歪棒同士の間に配置されている請求項1または2に記載の発電装置。
- 前記磁歪素子と前記梁部材との総数が奇数となるように構成されている請求項1ないし3のいずれかに記載の発電装置。
- 側面視において、各前記磁歪素子の前記磁歪棒と前記梁部材とが重ならないよう配置されている請求項1ないし4のいずれかに記載の発電装置。
- 前記コイルは、前記磁歪棒の外周側に、前記磁歪棒を囲むように配置されたボビンと、該ボビンに巻回された線材とを備え、
前記磁歪棒と前記ボビンとの間には、少なくとも前記磁歪棒の前記他端側において空隙が形成されている請求項1ないし5のいずれかに記載の発電装置。 - 各前記磁歪素子の前記他端の変位は、前記磁歪棒に振動を付与することによりなされ、前記空隙は、前記ボビンと振動する前記磁歪棒とが干渉しないようなサイズを有する請求項6に記載の発電装置。
- 前記梁部材は、非磁性材料で構成されている請求項1ないし7のいずれかに記載の発電装置。
- 前記梁部材のバネ定数をA[N/m]、前記梁部材の数をX[本]とし、前記磁歪棒のバネ定数をB[N/m]、前記磁歪棒の数をY[本]としたとき、A×Xの値とB×Yの値とがほぼ等しい請求項1ないし8のいずれかに記載の発電装置。
- 前記梁部材を構成する材料のヤング率を80~200GPaとし、前記磁歪棒を構成する磁歪材料のヤング率を30~100GPaとする請求項1ないし9のいずれかに記載の発電装置。
- 前記梁部材は、前記第1の連結部材および前記第2の連結部材と一体的に形成されている請求項1ないし10のいずれかに記載の発電装置。
- 各前記磁歪素子の前記磁歪棒には、自然状態で前記梁部材により伸長応力または収縮応力が付与されている請求項1ないし11のいずれかに記載の発電装置。
- 各前記磁歪素子は、さらに、前記磁歪棒の一方の端部を収容する収容部を備える第1のブロック体と、前記磁歪棒の他方の端部を収容する収容部を備える第2のブロック体とを備え、
前記第1の連結部材が前記第1のブロック体にネジ止めされ、前記第2の連結部材が前記第2のブロック体にネジ止めされる請求項1ないし12のいずれかに記載の発電装置。 - 前記磁歪棒は、平板状をなし、
前記収容部は、前記磁歪棒の前記端部を挿入するスリットで構成されている請求項13に記載の発電装置。 - 前記磁歪棒は、平板状をなし、
前記収容部は、前記磁歪棒の前記端部を載置する段差部で構成されている請求項13または14に記載の発電装置。 - 着磁方向が、前記磁歪素子が併設された併設方向となるようにして配置された少なくとも1つの永久磁石を有し、
該永久磁石は、前記磁歪素子の前記第1のブロック体同士の間および前記磁歪素子の前記第2のブロック体同士の間の少なくとも一方に配置されている請求項13ないし15のいずれかに記載の発電装置。 - 着磁方向が、前記磁歪素子が併設された併設方向となるようにして配置された少なくとも1つの永久磁石を有する請求項1ないし16のいずれかに記載の発電装置。
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WO2021132482A3 (ja) * | 2019-12-25 | 2021-08-19 | 日鉄ケミカル&マテリアル株式会社 | 発電用磁歪素子および磁歪発電デバイス |
JP7557357B2 (ja) | 2019-12-25 | 2024-09-27 | 日鉄ケミカル&マテリアル株式会社 | 磁歪発電デバイス |
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US20160072410A1 (en) | 2016-03-10 |
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