CN108448853B - High-speed generator adopting magnetic powder and binding material rotor - Google Patents
High-speed generator adopting magnetic powder and binding material rotor Download PDFInfo
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- CN108448853B CN108448853B CN201810196615.4A CN201810196615A CN108448853B CN 108448853 B CN108448853 B CN 108448853B CN 201810196615 A CN201810196615 A CN 201810196615A CN 108448853 B CN108448853 B CN 108448853B
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- 239000000463 material Substances 0.000 title claims abstract description 78
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 46
- 238000004804 winding Methods 0.000 claims description 57
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 39
- 239000004917 carbon fiber Substances 0.000 claims description 39
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 28
- 239000011347 resin Substances 0.000 claims description 17
- 229920005989 resin Polymers 0.000 claims description 17
- 239000003365 glass fiber Substances 0.000 claims description 15
- 239000000696 magnetic material Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 239000000112 cooling gas Substances 0.000 claims description 5
- 238000013021 overheating Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 103
- 230000005284 excitation Effects 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002500 effect on skin Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
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- 238000003754 machining Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
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- 239000002356 single layer Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model provides a high-speed generator of adoption magnetic powder and ligature material rotor which characterized in that: the motor comprises a shell (1), a stator and a layered binding mixed permanent magnet rotor, wherein the stator and the rotor are arranged in the shell (1), and the structure can effectively reduce a heat source in the motor rotor and radically solve the problem of overheating of the high-speed motor rotor. Meanwhile, the structure ensures the uniformity, the integrity and the consistency of the motor rotor, and can mechanically solve the problem that the permanent magnet is broken due to larger tensile stress under the condition of high-speed rotation.
Description
Technical Field
The invention relates to a high-speed generator adopting magnetic powder and binding material rotors. Belongs to the field of motors.
Background
The high-speed permanent magnet synchronous generator has high power density and high rotating speed, and the motor volume is far smaller than that of a medium-low rotating speed motor with the same output power, so that the material can be effectively saved; the high-speed motor has small size, so that the motor has small moment of inertia and quick dynamic response capability; the high-speed motor can be directly connected with the prime motor, so that the traditional mechanical speed change device is omitted, the efficiency of a traditional system can be improved, and the noise is reduced. Especially, the permanent magnet generator has the advantages of high power energy density, simple structure, no excitation loss, high efficiency and the like, and is particularly suitable for being used as a medium-sized and small-sized high-speed motor. Along with the industrial electrification process, the high-speed motor is used for replacing the original diesel engine as a power source, so that the high-speed permanent magnet generator has a great number of remarkable advantages, such as improving the use efficiency of energy sources, reducing environmental noise and the like, and the research and application of the high-speed permanent magnet generator meet the economic development needs of energy conservation and emission reduction, and is one of research hotspots in the international electrotechnical field at present, and has a wide development prospect in aviation, ships, hybrid electric vehicles, high-speed grinding machines, energy storage flywheels and distributed power generation systems.
Compared with a common motor, the high-speed permanent magnet generator has the advantages that the design difficulty is high, the rotating speed of the high-speed motor is as high as tens of thousands of revolutions per minute or even hundreds of thousands of revolutions per minute, the circumferential speed can be more than 200m/s, the stator core loss is very high under the condition that the motor rotates at a high speed, the friction between the air and the surface of the rotor can bring great loss to the motor, meanwhile, for the high-speed permanent magnet motor, the eddy current loss of the rotor permanent magnet is very high, the heat dissipation of the rotor of the motor is difficult, the temperature rise of the rotor of the motor is too high, the permanent magnet can be irreversibly demagnetized under the condition that the temperature is too high, and serious harm is caused to the motor, so that the loss of the rotor of the motor is one of core problems of the design of the high-speed permanent magnet motor. For high-speed permanent magnet motors, the problem of rotor strength is more pronounced, because the permanent magnets cannot withstand the tensile stresses generated by high-speed rotation and must be protected.
Disclosure of Invention
The invention aims to: the invention provides a high-speed generator adopting a magnetic powder and binding material rotor, and aims to solve the problems that the permanent magnet is irreversibly demagnetized due to high eddy current loss and difficult heat dissipation of the rotor of the traditional high-speed permanent magnet motor and the permanent magnet is damaged due to insufficient strength under the condition of high-speed rotation.
The technical scheme is as follows: the invention adopts the following technical scheme:
the utility model provides a high-speed generator of adoption magnetic powder and ligature material rotor which characterized in that: the motor comprises a shell, a stator and a layered binding mixed permanent magnet rotor, wherein the stator and the rotor are both arranged in the shell, the stator comprises a stator core and a stator winding, the stator winding is arranged in the stator core, the rotor axially passes through the stator, an axial inner air channel for cooling gas to pass through is reserved between the rotor and the stator, an air channel inlet and an air channel outlet are respectively arranged on shells at two ends of the stator, and the air channel inlet is communicated with the air channel outlet through the axial inner air channel; so that the rotor cooling gas passes through the axial inner air duct from the air duct inlet and finally exits from the outlet air duct, and the cooling of the rotor is completed.
The layered binding mixed permanent magnet rotor comprises a rotor core, a rotor outer unit layer, a rotor middle unit layer and a rotor inner unit layer; the inner unit layer of the rotor is arranged outside the rotor core, the middle unit layer of the rotor is arranged outside the inner unit layer of the rotor, the outer unit layer of the rotor is arranged outside the middle unit layer of the rotor, a layer of carbon fiber is bound outside the outer unit layer of the rotor, and each unit layer is composed of the carbon fiber or glass fiber layer of the inner layer and the outer mixed permanent magnet material layer. The novel mixed permanent magnet structure is formed by alternately binding novel mixed permanent magnet materials and carbon fibers, wherein no matter how many layers are, the novel mixed permanent magnet materials are arranged, and then a layer of carbon fibers is added on the outermost layer
The stator core (4) is provided with a hole which penetrates through the rotor car and penetrates through the hole in the axial direction, and the stator winding (5) is arranged in the hole wall of the stator core (4).
Winding pressing plates (3) are further arranged at two ends of the stator. (the winding pressing plate adopts insulating heat-conducting material, and has the main functions of fixing the end parts of the two ends of the winding, and simultaneously, the pressing plate can effectively exchange heat between the winding end parts and the stator, thereby being beneficial to reducing the temperature rise of the winding end parts.)
The mixed permanent magnet material layer (15) is formed by mixing permanent magnet material magnetic powder and resin. ( The mixing method of the materials is that the excitation required by the operation of the motor is calculated by accurate finite elements, and then the magnetic powder of the permanent magnet material is mixed with the resin 1:1, because if the proportion is too large, the integrity of the novel permanent magnet material after mixing is greatly affected, the strength problem is difficult to ensure, if the proportion is too small, excitation is difficult to achieve, the overall thickness is increased, and the strength problem is also revealed. )
The mixed permanent magnetic material layers (15) are sequentially increased in the content of the permanent magnetic material magnetic powder of each layer of unit along with the increase of the number of the unit layers from inside to outside along the radial direction, the thicknesses of the bound carbon fibers or glass filaments are sequentially increased, and a plurality of poles are formed by overall magnetizing. (according to the power grade of the motor, the maximum outer diameter of the rotor of the motor is determined, the required excitation of the motor is determined, the number of rotor layering and the content of magnetic powder are primarily estimated, the number of layering and the content of magnetic powder of each layer are finally determined through magnetic circuit calculation and iteration for a plurality of times, the thickness increase of carbon fiber or glass fiber is calculated according to accurate finite element calculation, the thickness of the carbon fiber or glass fiber of an outer unit layer is calculated to be enough to ensure the reliability of the mixed permanent magnet material of an inner unit layer), and in general, the thickness is in direct proportion to the square of the radius of the rotor after bundling.
End covers (12) are arranged at two ends of the casing (1).
A stator groove for fixing the winding is formed in the inner wall of the stator iron core (4), the stator groove is a pear-shaped groove, and an opening of the pear-shaped groove faces the rotor; the upper layer and the lower layer of the winding component are connected by adopting short-distance lap windings, and the windings are wound in parallel by adopting a plurality of thin wires. ( The windings are generally divided into a single-layer winding and a double-layer winding, wherein the double-layer winding is adopted, so that the windings are divided into an upper layer and a lower layer, and the short-pitch winding comprises a short-pitch lap winding and a short-pitch wave winding; the multiple parallel windings replace the original thick wires with multiple thin wires, thereby reducing the skin effect. )
The plurality of parallel windings of the thin wires are in a form of short-distance Y connection. (connection mode of short-pitch star connection adopting a plurality of parallel windings).
The rotor with the mixed permanent magnet material layered binding structure is mainly characterized by adopting a layered binding structure of mixed permanent magnet materials, wherein the mixed permanent magnet materials are formed by mixing permanent magnet powder with resin, and each unit layer is formed by carbon fibers (or glass fibers) of an inner layer and the mixed permanent magnet materials of an outer layer. The carbon fibers (or glass filaments) of the inner layer are used for fixation and the hybrid permanent magnet material of the outer layer is used for excitation. The mixed permanent magnet material and the carbon fiber (or glass fiber) are alternately arranged, after a plurality of unit layers are bound, a layer of thinner carbon fiber is bound on the outermost layer of the mixed permanent magnet material to ensure the integral strength of the motor rotor, and then the rotor of the high-speed permanent magnet generator adopting the magnetic powder and the binding material rotor is formed. The mixed permanent magnet material and the carbon fiber (or glass fiber) are alternately arranged, after a plurality of unit layers are bound, a layer of thinner carbon fiber is bound on the outermost layer of the mixed permanent magnet material, the rotor of the mixed permanent magnet material layered binding structure is radially from inside to outside, the content of the magnetic powder of the permanent magnet material is sequentially increased along with the increase of the number of the unit layers, and the thickness of the carbon fiber (or glass fiber) is sequentially thickened. The outermost layer of the rotor has the greatest requirement on strength, so the thickness of the carbon fiber bound by the outermost layer is larger.
The carbon fiber and the resin in the radial layered rotor structure of the mixed permanent magnet material are all electric insulation materials, and the permanent magnet material magnetic powder with larger conductivity is mixed with the resin and layered and bound with the carbon fiber to form a layered binding structure of the mixed permanent magnet material, so that the eddy current loss generated by the permanent magnet material in the rotor can be greatly reduced, and the heating of the rotor is effectively reduced; meanwhile, as the carbon fiber material has the characteristics of small density, high tensile strength and small influence by temperature, the mixed material containing the permanent magnet powder can be safely and effectively protected under the condition that the rotor rotates at a high speed, the uniformity and the integrity of the mixed permanent magnet material and the magnetic powder can be greatly improved by the resin, the problem of overlarge local stress caused by the high-speed operation of the motor rotor is avoided, and the reliability of the strength of the motor rotor can be effectively ensured when the motor rotor rotates at a high speed by adopting the magnetic powder and the binding material rotor.
The stator slots on the stator for arranging the windings are pear-shaped slots, the windings are formed by upper and lower layers, short-distance lap winding connection is adopted, and the windings are wound in parallel by adopting a plurality of thin wires, so that the additional loss caused by skin effect can be effectively reduced; the stator core is formed by laminating ultrathin low-loss cold-rolled non-oriented electrical steel sheets, and can effectively reduce the core loss under high frequency.
An axial inner air channel is arranged between the stator winding and the periphery of the rotor; an air inlet and an air outlet of the air duct are arranged on the shell.
The advantages and effects:
the invention provides a high-speed generator adopting a rotor with magnetic powder and binding materials, wherein the rotor adopts mixed permanent magnetic materials which are formed by mixing permanent magnetic powder and resin and magnetizing the mixture to form a plurality of poles, each unit layer is formed by inner-layer carbon fibers (or glass fibers) and outer-layer mixed permanent magnetic materials, the inner-layer carbon fibers or glass fibers are used for fixing the inner structure of the rotor and improving the strength, and the outer-layer mixed permanent magnetic materials are used for providing excitation. The mixed material and the carbon fiber (or glass fiber) are alternately arranged, after a plurality of units are bound, a layer of carbon fiber is bound on the outermost layer of the mixed material to ensure the integral strength of the motor rotor, and then the high-speed permanent magnet generator rotor adopting the magnetic powder and the bound material rotor is formed. The rotor of the rotor generator adopting the magnetic powder and binding materials is sequentially increased along with the increase of the number of unit layers from inside to outside, and the outermost layer of the rotor has the greatest requirement on strength, so that the thickness of the carbon fiber bound by the outermost layer is larger. In the radial layered rotor structure of the mixed permanent magnet material, the magnetic powder is mixed with the resin, so that the eddy current loss in the rotor can be effectively reduced, the heat source of the motor is further reduced, and the temperature rise of the motor is reduced. The permanent magnet magnetic powder and the resin are uniformly distributed on the circumferential surface of the rotor, so that the integrity and consistency of the rotor can be ensured, and the phenomenon of uneven edge stress distribution caused by adopting a permanent magnet block structure can be avoided. Meanwhile, due to the winding of the carbon fiber, the carbon fiber has the characteristics of small density, high tensile strength and small influence of temperature, and can ensure the reliable operation of the permanent magnet rotor at high temperature and high speed.
The beneficial effects of the invention are as follows:
1. the mixed permanent magnet adopts a circular ring-shaped structure formed by permanent magnet material magnetic powder and resin, replaces a block structure of a magnetic steel block and a filling block in a conventional motor, ensures the integrity, uniformity and consistency of a rotor of the high-speed permanent magnet motor, eliminates the problem of permanent magnet damage caused by overlarge local stress caused by edge effect between the magnetic steel blocks of the conventional structure and between the magnetic steel and the filling block, further improves the tensile strength of the rotor of the high-speed permanent magnet motor, improves the rotation speed limit of the rotor, and increases the output power of the motor on the premise of unchanged volume, which cannot be realized by adopting the magnetic steel and the filling block structure of the conventional motor.
2. The rotor is made of magnetic powder and binding materials, and consists of 1,2,3, n unit layers from inside to outside, wherein each unit layer contains a mixed permanent magnet material for providing excitation and carbon fiber or glass fiber for increasing the strength of the rotor, and the outermost layer is bound with a layer of carbon fiber to ensure the integral strength of the rotor. The carbon fiber material has the characteristics of small density, high tensile strength and less influence by temperature, and the layered binding structure of the rotor can greatly ensure the running reliability of the hybrid permanent magnet rotor under the condition of high speed and high temperature.
3. The mixed permanent magnetic material is formed by mixing permanent magnetic material magnetic powder and resin in proportion, the resin is an electric bad conductor, the eddy current in the mixed permanent magnetic material can be effectively reduced after the resin is mixed, the loss of the part is reduced, and the problem of serious local heating of the part is solved.
4. In the rotor with the magnetic powder and binding materials, the conductive permanent magnet material magnetic powder added in the outer layer can shield high-frequency electromagnetic waves, so that the high-frequency eddy current loss of the permanent magnet material magnetic powder in the inner layer mixed material is reduced. The structure can effectively reduce the heat source in the motor rotor, and radically solves the problem of overheating of the high-speed motor rotor.
5. The magnetic powder and binding material rotor has high elastic modulus, high specific strength and low density, and can improve the inherent frequency of the rotor and the stable operation range of the motor rotor.
Drawings
The invention is described in detail below with reference to the drawings and the detailed description.
Fig. 1 is a schematic circuit connection diagram of a motor according to the present invention.
FIG. 2 is a block diagram of a motor according to the present invention;
FIG. 3 is a schematic view of a layer structure of a motor rotor unit according to the present invention
FIG. 4 is an axial cross-sectional view of the present invention;
in the figure: 1. the motor comprises a motor shell, an air duct inlet, a stator pressing plate, a stator iron core, a stator winding, an axial inner air duct, a rotor outer unit layer, a rotor middle unit layer, a rotor inner unit layer, a winding end part, an air duct outlet, a motor end cover, a sliding bearing, a rotor iron core, a mixed permanent magnet material and carbon fiber (or glass fiber) and is characterized in that the motor shell is arranged in the motor shell, the air duct inlet is arranged in the motor shell, the stator pressing plate is arranged in the motor shell, the stator iron core is arranged in the motor shell, the stator winding is arranged in the motor shell, the axial inner air duct is arranged in the motor shell, the axial inner unit layer is arranged in the motor shell, the rotor inner unit layer is arranged in the rotor, the winding end part is arranged in the motor shell, the air duct outlet is arranged in the motor shell, the motor shell is arranged in the motor shell.
The specific embodiment is as follows: the invention is described in detail below with reference to the attached drawing figures:
the utility model provides a high-speed generator of adoption magnetic powder and ligature material rotor which characterized in that: the motor comprises a shell 1, a stator and a layered binding mixed permanent magnet rotor, wherein the stator and the rotor are both arranged in the shell 1, the stator comprises a stator iron core 4 and a stator winding 5, the stator winding 5 is arranged in the stator iron core 4, the rotor axially passes through the stator, an axial inner air duct 6 for cooling gas to pass through is reserved between the rotor and the stator, an air duct inlet 2 and an air duct outlet 11 are respectively arranged on shells at two ends of the stator, and the air duct inlet 2 is communicated with the air duct outlet 9 through the axial inner air duct 6; so that the rotor cooling gas passes through the axial inner air duct from the air duct inlet and finally exits from the outlet air duct, and the cooling of the rotor is completed.
The layered binding mixed permanent magnet rotor comprises a rotor core 14, a rotor outer unit layer 7, a rotor middle unit layer 8 and a rotor inner unit layer 9; the inner unit layer 9 of the rotor is arranged outside the rotor core 14, the middle unit layer 8 of the rotor is arranged outside the inner unit layer 9 of the rotor, the outer unit layer 7 of the rotor is arranged outside the middle unit layer 8 of the rotor, a layer of carbon fiber is bound outside the outer unit layer 7 of the rotor, and each unit layer is composed of an inner layer of carbon fiber or glass fiber layer 16 and an outer mixed permanent magnet material layer 15.
The stator core 4 is provided with a hole through which a hole rotor vehicle passes in the through axial direction, and the stator winding 5 is provided in the hole wall of the stator core 4.
Winding pressing plates 3 are further arranged at two ends of the stator.
The mixed permanent magnet material layer 15 is a material formed by mixing permanent magnet material magnetic powder and resin.
The mixed permanent magnetic material layers 15 are sequentially increased along with the increase of the number of the unit layers from inside to outside along the radial direction, the thicknesses of the bound carbon fibers or glass filaments are sequentially increased, and the whole magnetization is carried out to form a plurality of poles.
End caps 12 are provided at both ends of the casing 1.
The stator core 4 is provided with a stator slot for fixing windings, the stator slot is a pear-shaped slot, the winding components are in upper and lower layers, short-distance lap winding connection is adopted, and the windings are wound in parallel by adopting a plurality of thin wires.
The plurality of parallel windings of the thin wires are in a form of short-distance Y connection.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the generator rotor is connected with a prime motor, the prime motor rotates to drive the high-speed permanent magnet generator rotor to rotate, and the stator winding of the high-speed permanent magnet generator is connected with a load to provide electric energy for the load.
As shown in fig. 2, winding pressing plates 3 are installed at both ends of the stator core, and stator windings 5 are embedded in stator slots of the stator core 4. The stator slot adopts a pear-shaped slot, and the winding 5 adopts a form of a plurality of thin wires which are connected in parallel around a short distance Y, so that the additional loss under high-frequency driving can be reduced, larger cogging torque generated by larger slot opening size can be avoided, the torque fluctuation when the generator operates is reduced, and the motor operates more reliably. The motor rotor is radially and integrally magnetized after machining. When the motor operates, cold air enters the motor from the air inlet 2 of the shell, flows to the axial inner air channel 6 through the winding end part, flows out from the air channel outlet 11 of the motor through the winding end part at the other end, and completes cooling of the motor. The motor rotor with the mixed permanent magnet material layered binding structure consists of a rotor outer layer 7, a rotor middle layer 8, a rotor inner layer 9 and a rotor core 14. Both ends of the rigid shaft are supported by slide bearings 13.
As shown in fig. 3, each unit layer is bound with a layer of very thin carbon fiber (or glass fiber) to fix, then a mixed permanent magnet material is added to the outer layer to provide excitation for the motor, the mixed permanent magnet material is formed by uniformly mixing permanent magnet powder and resin, and a plurality of unit layers are overlapped to form the layered rotor structure, wherein the resin is an electrical poor conductor, after mixing, the eddy current in the mixed permanent magnet material can be effectively reduced, the loss of the part is reduced, and the problem of serious local heating of the part is solved. Meanwhile, the radial layered structure distributes concentrated stress of the rotor in each unit layer during high-speed operation, so that the strength of the rotor is greatly increased, and the rotation speed limit of the rotor is improved.
As shown in fig. 4, the motor rotor is divided into a plurality of unit layers according to the content of magnetic powder from inside to outside along the radial direction, carbon fibers (or glass filaments) of the inner layer in each unit layer are used for fixing, and the mixed permanent magnet materials in the outer layer are used for providing excitation. When the motor runs, the rotor magnetic field and the stator magnetic field are hinged, and the rotor provides excitation, so that the reliability of strength in the outer unit layers is ensured for better improving the utilization rate of materials, and the magnetic powder content and the thickness of carbon fibers (or glass filaments) in each unit layer are sequentially increased from inside to outside in the layered rotor processing process. Meanwhile, the conductive permanent magnet material magnetic powder added in the outer unit layer can shield high-frequency electromagnetic waves, so that high-frequency eddy current loss in the permanent magnet material magnetic powder of the inner unit layer is reduced. The structure ensures uniformity, integrity and consistency of the rotor in the circumferential direction, and meanwhile, the rotor structure has high elastic modulus, high specific strength and low density, and can improve the inherent frequency of the rotor and the stable operation range of the motor rotor. The carbon fiber material has the characteristics of small density, high tensile strength and less influence by temperature, can protect the permanent magnet more safely and effectively when running at high temperature and high speed, and avoids the problem of overlarge local stress in the high-speed running process of the motor.
The motor has the characteristics of higher reliability, simple structure, high rotor strength and the like.
The conductive permanent magnet material magnetic powder added in the outer unit layer of the rotor with the radial layered structure can shield high-frequency electromagnetic waves, and reduces the high-frequency eddy current loss of the mixed permanent magnet material magnetic powder in the inner unit layer. The structure can effectively reduce the heat source in the motor rotor, and radically solves the problem of overheating of the high-speed motor rotor. Meanwhile, the structure ensures the uniformity, the integrity and the consistency of the motor rotor, and can mechanically solve the problem that the permanent magnet is broken due to larger tensile stress under the condition of high-speed rotation.
Claims (7)
1. The utility model provides a high-speed generator of adoption magnetic powder and ligature material rotor which characterized in that: the generator comprises a shell (1), a stator and a layered binding mixed permanent magnet rotor, wherein the stator and the rotor are both arranged in the shell (1), the stator comprises a stator iron core (4) and a stator winding (5), the stator winding (5) is arranged in the stator iron core (4), the rotor axially penetrates through the stator, an axial inner air channel (6) for cooling gas to pass through is reserved between the rotor and the stator, an air channel inlet (2) and an air channel outlet (11) are respectively arranged on shells at two ends of the stator, and the air channel inlet (2) is communicated with an air channel outlet (9) through the axial inner air channel (6);
the layered binding hybrid permanent magnet rotor comprises a rotor core (14), a rotor outer unit layer (7), a rotor middle unit layer (8) and a rotor inner unit layer (9); the rotor inner unit layer (9) is arranged outside the rotor iron core (14), the rotor middle unit layer (8) is arranged outside the rotor inner unit layer (9), the rotor outer unit layer (7) is arranged outside the rotor middle unit layer (8), a layer of carbon fiber is bound outside the rotor outer unit layer (7), and each unit layer is composed of an inner layer of carbon fiber or glass fiber layer (16) and an outer mixed permanent magnet material layer (15);
the mixed permanent magnetic material layers (15) are sequentially increased in the content of the permanent magnetic material magnetic powder of each layer of unit along with the increase of the number of the unit layers from inside to outside along the radial direction, the thicknesses of the bound carbon fibers or glass filaments are sequentially increased, and a plurality of poles are formed by overall magnetizing.
2. A high speed generator employing magnetic powder and lashing material rotors as claimed in claim 1, wherein: the stator core (4) is provided with a hole which penetrates through the rotor car and penetrates through the hole in the axial direction, and the stator winding (5) is arranged in the hole wall of the stator core (4).
3. A high speed generator employing magnetic powder and lashing material rotors as claimed in claim 1, wherein: winding pressing plates (3) are also arranged at the two ends of the stator.
4. A high speed generator employing magnetic powder and lashing material rotors as claimed in claim 1, wherein: the mixed permanent magnet material layer (15) is formed by mixing permanent magnet material magnetic powder and resin.
5. A high speed generator employing magnetic powder and lashing material rotors as claimed in claim 1, wherein: end covers (12) are arranged at two ends of the casing (1).
6. A high-speed generator employing magnetic powder and lashing material rotor as claimed in claim 2, wherein: a stator groove for fixing the winding is formed in the inner wall of the stator iron core (4), the stator groove is a pear-shaped groove, and an opening of the pear-shaped groove faces the rotor; the upper layer and the lower layer of the winding component are connected by adopting short-distance lap windings, and the windings are wound in parallel by adopting a plurality of thin wires.
7. A high speed generator employing magnetic powder and lashing material rotors as defined in claim 6, wherein: the plurality of parallel windings of the thin wires are in a form of short-distance Y connection.
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| CN201810196615.4A CN108448853B (en) | 2018-03-09 | 2018-03-09 | High-speed generator adopting magnetic powder and binding material rotor |
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| CN201810196615.4A CN108448853B (en) | 2018-03-09 | 2018-03-09 | High-speed generator adopting magnetic powder and binding material rotor |
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| CN108448853B true CN108448853B (en) | 2024-01-16 |
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Citations (5)
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|---|---|---|---|---|
| WO1982004505A1 (en) * | 1981-06-10 | 1982-12-23 | Corbach Rainer | Rotor for permanent magnet electric machine |
| JP2001238381A (en) * | 2000-02-21 | 2001-08-31 | Mitsubishi Heavy Ind Ltd | Electric rotating machine |
| CN102983680A (en) * | 2012-11-28 | 2013-03-20 | 沈阳工业大学 | Air and water hybrid cooling high-speed permanent-magnet motor |
| CN103580383A (en) * | 2013-11-18 | 2014-02-12 | 沈阳工业大学 | Air-water-hybrid cooled high-speed permanent magnet motor with rotor under hybrid protection |
| CN106751773A (en) * | 2016-12-07 | 2017-05-31 | 杭州千石科技有限公司 | A kind of magnetic material system for magnetic locking structure packing box |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK1223662T3 (en) * | 2001-01-15 | 2004-07-05 | Atlas Copco Airpower Nv | Process for manufacturing a permanently magnetized rotor for an electric high speed motor |
| JP2012213310A (en) * | 2011-03-18 | 2012-11-01 | Toyota Industries Corp | Electric compressor |
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2018
- 2018-03-09 CN CN201810196615.4A patent/CN108448853B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982004505A1 (en) * | 1981-06-10 | 1982-12-23 | Corbach Rainer | Rotor for permanent magnet electric machine |
| JP2001238381A (en) * | 2000-02-21 | 2001-08-31 | Mitsubishi Heavy Ind Ltd | Electric rotating machine |
| CN102983680A (en) * | 2012-11-28 | 2013-03-20 | 沈阳工业大学 | Air and water hybrid cooling high-speed permanent-magnet motor |
| CN103580383A (en) * | 2013-11-18 | 2014-02-12 | 沈阳工业大学 | Air-water-hybrid cooled high-speed permanent magnet motor with rotor under hybrid protection |
| CN106751773A (en) * | 2016-12-07 | 2017-05-31 | 杭州千石科技有限公司 | A kind of magnetic material system for magnetic locking structure packing box |
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