CN109686539A - A kind of inductor - Google Patents
A kind of inductor Download PDFInfo
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- CN109686539A CN109686539A CN201910116606.4A CN201910116606A CN109686539A CN 109686539 A CN109686539 A CN 109686539A CN 201910116606 A CN201910116606 A CN 201910116606A CN 109686539 A CN109686539 A CN 109686539A
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- inductor
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- core column
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- 238000004804 winding Methods 0.000 claims abstract description 28
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims description 3
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 229910017706 MgZn Inorganic materials 0.000 claims description 2
- RFIJBZKUGCJPOE-UHFFFAOYSA-N [Fe].[Ni].[Zn] Chemical compound [Fe].[Ni].[Zn] RFIJBZKUGCJPOE-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011162 core material Substances 0.000 description 217
- 238000010586 diagram Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 11
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 8
- 230000004907 flux Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- -1 it have pot Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The application discloses a kind of inductor, including identical first magnetic core column and the second magnetic core column, identical first magnetic core valve and the second magnetic core valve.Since the core structure to inductor optimizes, specifically the first magnetic core valve of inductor and the second magnetic core valve are crescent structure, and outside is arc surface.So that compared to toroidal inductor, the conducting wire thickness of conductive coil is identical, umber of turn is identical and inductor outside dimensions under the same conditions, the effective cross-section of conductive coil winding magnetic core significantly increases, and then improves the inductance of inductor.Separately because the magnetic core of inductor disclosed in the present application is separate structure, convenient for the mass production of inductor, and then production cost is reduced.
Description
Technical field
The present invention relates to electronic components, and in particular to a kind of inductor.
Background technique
Inductor is commonly called as coil, and simplest inductor is exactly to use conducting wire hollow around several circles, has the inductor of magnetic core to exist
With conducting wire around several circles on magnetic core.No matter which kind of inductor, if fruit structure is identical, fundamental characteristics is identical, but the number of turns of coiling is not
With or when without magnetic core difference, the inductance of inductor it is of different sizes.Number of turns is more, and inductance is bigger, in same the number of turns
In the case where, after coil incrementss magnetic core, inductance be will increase.Air core coil does not have magnetic core, and usual coil turn is fewer, inductance
It is smaller, it is mainly used in high-frequency circuit, for example, medium with fm radio circuit in shortwave radio reception circuit.The area of iron core and magnetic core
Be not the difference of working frequency, working frequency it is low be known as iron core, working frequency it is high be known as magnetic core, such as exchanged for 50Hz
It is iron core in mains frequency circuit, the bar magnet in radio reception circuit bar magnet coil is magnetic core, and working frequency is up to thousands of Hz.Magnetic core
Different according to the height of working frequency, there are also points of low frequency core and high frequency magnetic core.
Inductance is common element in Switching Power Supply, due to its electric current and voltage-phase difference, so being theoretically lost
It is zero.Inductance is often energy-storage travelling wave tube, also often smooth electric with being used on input filter and output filter circuit together with capacitor
Stream.Inductance is also referred to as choke coil, and feature is to flow through electric current thereon to have " very big inertia ", i.e., due to magnetic flux continuation property,
Electric current on inductance must continuously, otherwise will generate very big due to voltage spikes.Inductance is as magnetic element, so there is magnetic
The problem of saturation.Some applications allow inductance to be saturated, and some applications allow inductance to initially enter saturation from certain current value, also have
Application do not allow inductance to be saturated.Ordinary circumstance, inductance work is at " linear zone ", and inductance value is a constant at this time, not with
End voltage change with electric current.But Switching Power Supply there is a problem of one it is very important, i.e. the coiling of inductance will lead to two
A distribution parameter (or parasitic parameter), one is inevitable wire resistor, the other is related with technique for coiling, material
Distributed stray capacitance.Stray capacitance influences less in low frequency, but fades in out with the raising of frequency, when frequency height to certain
It is a value it is above when, perhaps inductance becomes capacitance characteristic.Inductor is generally by skeleton, winding, shielding case, encapsulating material, magnetic core
Or iron core etc. composition, wherein magnetic core generally uses the materials such as nickel-zinc ferrite or manganese-zinc ferrite, it have pot, RM type, E type,
EC type, ETD type, EER type, PQ type, EP type and toroidal core etc..
As shown in Figure 1, toroidal core is most to be a kind of using the flat wire vertical inductor structure schematic diagram around toroidal core
It is economical, in other comparable various magnetic cores, its cost be it is minimum, output electric current is big, and small, proof voltage, electricity is lost
Sense is high, and price is low.Due to its good EMC electromagnetic property, stand around performances such as the good heat dissipations of structure, as photovoltaic DC-to-AC converter
Boost inductance, high-frequency inversion filter inductance, convertible frequency air-conditioner PFC inductance, UPS commutation inversion inductance, charging pile PFC inductance, new
The high-power high-frequencies inductance such as PFC inductance of the charger of energy automobile is widely adopted.Especially in the circuit design of power supply, need
The high power density of high frequency power inductance element is optimized.Specifically, annular core inductor is promoted as far as possible
Inductance.Because of the promotion of inductance, be very advantageous in power supply device stability control, reduce power supply device PFC ripple,
Improve the higher harmonic content of PFC electric current, improve the efficiency of power supply.And in actual circuit design, inductor needs higher
Magnetic conductivity, lower loss, higher saturation and magnetic flux density, higher frequency of use, higher use warm area, smaller
Volume and weight, short mounting height.It not only needs to limit the bulk of inductor, also to limit the winding wire of inductor
The thickness sectional area of winding wire (limit).It in the prior art, is the inductance for promoting annular core inductor, toroidal core
Using the magnetic material of iron-nickel alloy soft magnetic-powder core.Although the inductor of the toroidal core of such magnetic material, in the big electricity of high frequency
Under the conditions of stream, it is easy to obtain big inductance quantity, and have the characteristics that high-efficient, small in size, but the production cost pole of such inductor
It is expensive.In addition, the coiling cost of the inductor of toroidal core is high, it is difficult to produce in enormous quantities.
Summary of the invention
The present invention solves the technical problem of the thick of the winding wire in the bulk and inductor for limiting inductor
The inductance of inductor is improved under conditions of thin.
According in a first aspect, provide a kind of inductor in a kind of embodiment, including identical first magnetic core column and the second magnetic
Stem, identical first magnetic core valve and the second magnetic core valve；
The first magnetic core valve and the second magnetic core valve are respectively provided with two opposite sides, and the bottom surface to connect and
Arc surface；
The first magnetic core column and the second magnetic core column are all wound with conductive coil；Wherein the first magnetic core column is twined
Around conductive coil a terminal of the one end as inductor, the other end for the conductive coil that the first magnetic core column is wound
One end of the conductive coil wound with the second magnetic core column is connect, the conductive coil that the first magnetic core column is wound it is another
Another terminal of one end as inductor；
The first magnetic core valve and the second magnetic core valve are arranged in the opposite mode in bottom surface, the first magnetic core column and institute
It states the second magnetic core column to be arranged side by side among the first magnetic core valve and the second magnetic core valve, so that the first magnetic core column
It is in contact respectively with the bottom surface of the first magnetic core column, the second magnetic core column with the end face of the second magnetic core column.
A kind of inductor according to above-described embodiment makes inductance since the core structure to inductor optimizes
The the first magnetic core valve and the second magnetic core valve of device are crescent structure, and outside is arc surface, so that vertical around inductance relative to annular
Device, the conducting wire thickness of conductive coil is identical, umber of turn is identical and inductor outside dimensions under the same conditions, make conductor wire
The effective sectional area of circle winding magnetic core significantly increases, to improve the inductance of inductor.Because the magnetic core of inductor is separate structure,
Convenient for the mass production of inductor, and then reduce production cost.
Detailed description of the invention
Fig. 1 is a kind of using the vertical inductor structure schematic diagram around toroidal core of flat wire；
Fig. 2 is a kind of core structure schematic diagram of inductor in embodiment；
Fig. 3 is that schematic diagram is arranged in the air gap of inductor core valve in an embodiment；
Fig. 4 is that schematic diagram is arranged in the air gap of inductor core column in an embodiment；
Fig. 5 is the comparison schematic diagram of inductor disclosed in the present application and toroidal inductor；
Fig. 6 is the schematic perspective view of inductor in an embodiment；
Fig. 7 is the separate structure schematic diagram of inductor in an embodiment；
Fig. 8 is the terminal connection schematic diagram of inductor in an embodiment；
Fig. 9 is oval inductor and toroidal inductor space arrangement schematic diagram in an embodiment.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is formed respectively in addition, feature described in this description, operation or feature can combine in any suitable way
Kind embodiment.Meanwhile each step in method description or movement can also can be aobvious and easy according to those skilled in the art institute
The mode carry out sequence exchange or adjustment seen.Therefore, the various sequences in the description and the appended drawings are intended merely to clearly describe a certain
A embodiment is not meant to be necessary sequence, and wherein some sequentially must comply with unless otherwise indicated.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
In embodiments of the present invention, the core structure of inductor is optimized, it specifically will be outside inductor coil
Magnetic Core Design at crescent structure, to increase the effective sectional area of the conductive coil winding magnetic core of inductor, and then improve electricity
The inductance of sensor.Because the magnetic core of inductor is separate structure, convenient for the mass production of inductor, and then reduces and be produced into
This.
Embodiment one:
Referring to FIG. 2, inductor includes identical first magnetic for a kind of core structure schematic diagram of inductor in embodiment
Stem 30 and the second magnetic core column 40, identical first magnetic core valve 10 and the second magnetic core valve 20.First magnetic core valve 10 and the second magnetic core
Valve 20 all has two opposite sides, and the bottom surface to connect and arc surface.First magnetic core column 30 and the second magnetic core column 40 are all
It is wound with conductive coil.Wind the conductor wire of the second magnetic core column 40 of winding direction and winding of the conductive coil of the first magnetic core column 30
The winding direction of circle is identical, or, the second magnetic core column 40 of the winding direction of the conductive coil of the first magnetic core column 30 of winding and winding
The winding direction of conductive coil is not identical.Wherein, the one end for the conductive coil that the first magnetic core column 30 is wound is as inductor
The conductive coil that one terminal, the other end for the conductive coil that the first magnetic core column 30 is wound and the second magnetic core column 40 are wound
One end connection, another terminal of the other end for the conductive coil that the first magnetic core column 30 is wound as inductor.First magnetic core
Valve 10 and the second magnetic core valve 20 are arranged in the opposite mode in bottom surface, and the first magnetic core column 30 and the second magnetic core column 40 are arranged side by side in
Among one magnetic core valve 10 and the second magnetic core valve 20, so that the end face of the first magnetic core column 30 and the second magnetic core column 40 is respectively with first
The bottom surface of magnetic core valve 10 and the second magnetic core valve 20 is in contact.In one embodiment, the first magnetic core column 30 and the second magnetic core column 40 are long
Cube or cylindrical body.In one embodiment, the edge between the first magnetic core valve 10 and the bottom surface and arc surface of the second magnetic core valve 20 is fallen
Fillet.In one embodiment, the edge rounded corner of the first magnetic core column 30 and the second magnetic core column 40.Wherein, the radius of rounded corners is
/ to five/10th of the exradius of first magnetic core column 30 and the second magnetic core column 40.In one embodiment, the first magnetic core
The end face of column 30 and the second magnetic core column 40 is slightly less than the half of the bottom surface of the first magnetic core valve 10 and the second magnetic core valve 20.
As shown in figure 3, the air gap for inductor core valve in an embodiment is arranged schematic diagram, the first magnetic core valve 10 and/or
Settable magnetic core valve air gap 11 in second magnetic core valve 20.In one embodiment, the setting of magnetic core valve air gap 11 the first magnetic core valve 10 and/
Or second magnetic core valve 20 middle axial plane on.In one embodiment, magnetic core valve air gap 11 is arranged in the first magnetic core valve 10 and/or the second magnetic
On the third partial cross-section of core valve 20.In one embodiment, magnetic core valve air gap 11 is arranged in the first magnetic core valve 10 and/or the second magnetic core valve
On 20 quartering section.In addition, the setting of the magnetic core valve air gap 11 of the first magnetic core valve 10 and the second magnetic core valve 20 can be identical
It can not also be identical.Wherein, not identical to can be the first magnetic core valve 10 setting magnetic core valve air gap 11, the second magnetic core valve 20 is not provided with
Magnetic core valve air gap 11；Or, that position is arranged is different and for the first magnetic core valve 10 and the respective magnetic core valve air gap 11 of the second magnetic core valve 20
It is different that number is arranged in one magnetic core valve 10 and the respective magnetic core valve air gap 11 of the second magnetic core valve 20.In one embodiment, the first magnetic core valve
10 and/or the second 11 place plane of magnetic core valve air gap in magnetic core valve 20 and the first magnetic core valve 10 and/or the second magnetic core valve 20
Plane perpendicular.
As shown in figure 4, the air gap for inductor core column in an embodiment is arranged schematic diagram, the first magnetic core column 30 and/or
Settable magnetic core column air gap 31 in second magnetic core, 40 column.In one embodiment, the setting of magnetic core column air gap 31 the first magnetic core column 30 and/
Or second magnetic core column 40 middle axial plane on.In one embodiment, magnetic core column air gap 31 is arranged in the first magnetic core column 30 and/or the second magnetic
On the third partial cross-section of stem 40.In one embodiment, magnetic core column air gap 31 is arranged in the first magnetic core column 30 and/or the second magnetic core column
On 40 quartering section.In addition, the setting of the magnetic core column air gap 31 of the first magnetic core column 30 and/or the second magnetic core column 40 can phase
With can not also be identical.Wherein, not identical to can be the first magnetic core column 30 setting magnetic core column air gap 31, the second magnetic core column 40 is not set
Set magnetic core column air gap 31；Or, position is arranged not in the first magnetic core column 30 and/or the respective magnetic core column air gap 31 of the second magnetic core column 40
Together and the first magnetic core column 30 and/or the respective magnetic core column air gap 31 of the second magnetic core column 40 that number is arranged is different.
Further, it is put into non-magnetic substance at magnetic core column air gap and magnetic core valve air gap, to adjust electricity disclosed in the present application
Magnetic circuit reluctance needed for sensor, to obtain the requirement of the coefficient of coup between the inductance and two coils of needs.In addition, by air gap
The different magnetic core blocks of cutting can use same material, different materials can also be used, to adjust electricity disclosed in the present application
Magnetic circuit reluctance needed for sensor.
As shown in figure 5, being the comparison schematic diagram of inductor disclosed in the present application and toroidal inductor, electricity disclosed in the present application
The magnetic core of sensor includes identical first magnetic core column 30 and the second magnetic core column 40, identical first magnetic core valve 10 and the second magnetic core valve
20.The arc surface axial symmetry of first magnetic core valve 10 and the second magnetic core valve 20.On first magnetic core column 30 and the second magnetic core column 40 respectively
Wind conductive coil 70.The the first magnetic core column 30 and 40 cross section of the second magnetic core column for winding conductive coil 70 are greater than toroidal core 80
Section.The total volume of the magnetic core of inductor disclosed in the present application is greater than the volume of the magnetic core of toroidal inductor.The application discloses
Inductor outer dimension, it is identical as loop sensor 90 on 20 direction of the first magnetic core valve 10 and the second magnetic core valve, and
Size on the direction of first magnetic core column 30 and the second magnetic core column 40 is less than loop sensor 90, that is, in the middle axial plane of inductor
On, the maximum distance of conductive coil outer is no more than the most long distance between the first magnetic core valve 10 and the arc surface of the second magnetic core valve 20
From.In one embodiment, conductive coil 70 is that flat wire founds coiling.In one embodiment, the first magnetic core column 30, the second magnetic core column
40, the material of the first magnetic core valve 10 and the second magnetic core valve 20 is the iron oxygen such as nickel-zinc ferrite or manganese-zinc ferrite, MgZn ferrite
Body.
It as shown in Figure 6 and Figure 7, is the schematic perspective view and separate structure schematic diagram of inductor in an embodiment, packet
Include the first magnetic core valve 10, the second magnetic core valve 20 and conductive coil 70.Conductive coil 70 includes first coil 71 and the second coil 72.
First coil 71 winds the first magnetic core column 30.Second coil 72 winds the second magnetic core column 40.First coil 71 includes first terminal
711 and Second terminal 712.Second coil 72 includes third terminal 721 and forth terminal 722.
In one embodiment, first coil 71 and the second coil 72 are that rectangle flat type copper wire stands coiling, 71 He of first coil
It is identical with the direction of the second magnetic core column 40 that second coil 72 winds the first magnetic core column 30 respectively.
As shown in figure 8, for the terminal connection schematic diagram of inductor in an embodiment, the Second terminal 712 of first coil 71
As a terminal 1 of inductor, the third terminal 721 of the first terminal 712 of First Line 71 and the second coil 72 is connected, and second
Another terminal of the forth terminal 722 of coil 72 as inductor.For single coil 71, inductance are as follows:
Wherein, V is the voltage at the both ends of first coil 71, and Ls is the self-induction of first coil 71, and M is first coil 71 and the
The mutual inductance that magnetic coupling between two coil 72 is formed, ∮ are to be passed through electric current generated magnetic flux, I in magnetic circuit in two inductance coils1
And I2It is then respectively the electric current for flowing through the two coil insides.
When the connection of the third terminal 721 of the first terminal 712 of first coil 71 and the second coil 72, the two current values
Identical, then the voltage at the both ends of single coil can be expressed as follows:
Wherein, V is the voltage at the both ends of first coil 71, and Ls is the self-induction of first coil 71, and M is first coil 71 and the
The mutual inductance that magnetic coupling between two coil 72 is formed, ∮ are to be passed through electric current generated magnetic flux, I in magnetic circuit in two inductance coils1
And I2It is then respectively the electric current for flowing through the two coil insides.
It can be obtained from above, the inductance of single coil first coil 71 are as follows:
L=Ls+M,
Wherein, L is inductance, and Ls is the self-induction of first coil 71, magnetic coupling of the M between first coil 71 and the second coil 72
Close the mutual inductance formed.
Then, first coil 71 and the concatenated total inductance of the second coil 72 are as follows:
L=2 (Ls+M),
Wherein, L is the total inductance amount of inductor, and Ls is the self-induction of first coil 71 or the second coil, and M is first coil 71
And the mutual inductance that the second magnetic coupling between coil 72 is formed.
The inductance of the toroidal inductor of toroidal core are as follows:
L=(K*O*s*N2S)/l,
Wherein, L is the inductance of toroidal inductor, and K is coefficient, and depending on the radius of coil and the ratio of length, l is coil
Length, the sectional area of S coil, N2For square of wire circle, S is the relative permeability of coil inside magnetic core, and O is Vacuum Magnetic
Conductance.The lead material thickness of conductive coil is identical, umber of turn is identical and inductor outside dimensions under the same conditions, ring
The inductance of shape inductor are as follows:
L=2Ls,
Wherein, Ls is the self-induction of first coil 71 or the second coil 72, because the coil length of toroidal inductor is First Line
The sum of circle 71 and the second coil 72.
From the foregoing, it will be observed that lead material thickness in conductive coil is identical, umber of turn is identical and inductor outside dimensions phase
With under conditions of, the inductance of inductor disclosed in the present application is greater than the inductance of toroidal inductor.
In one embodiment, the first coil 71 of inductor disclosed in the present application and the second coil 72 are connected without short circuit,
The coupling inductance of two coils is formed, such inductance is more applicable in the field of such as inverter one-phase exchange output inductor
It closes, each coil is used as the filter inductance in a phase line.
In one embodiment, 2 are needed for the Boost circuit of the pfc circuit of crisscross parallel, crisscross parallel etc. is various
Inductance interlocks operating circuit, and the coupling inductance of inductor disclosed in the present application can be used as the coupling shape of two inductance crisscross parallels
State carry out using, use in the side of inductance carry out short circuit as the public input pole of crisscross parallel and (such as extremely short connect conduct for 1,4
Public input), two outer 2 poles of two coils be respectively connected to 2 electric loops of crisscross parallel, form the double coupling electricity of crisscross parallel
The implementation form of sense.
Two inductance coil direction of windings of inductor disclosed in the present application are identical, constitute electrically identical magnetic flux
Flow direction, two inductance coils can also use opposite direction coiling, and diagonal short circuit manner equally constitutes the magnetic of the same direction
Logical, effect is identical.
Further, inductor disclosed in the present application will be set in flat vertical coiling proper alignment, the circle of the magnetic core valve of two sides
Cambered surface is located on the excircle configuration of the toroidal inductor of equivalent size, therefore the effective of the magnetic core of inductor disclosed in the present application cuts
Area significantly becomes larger, and the space occupancy of coil is substantially improved, so that the sky of the coil of inductor disclosed in the present application and magnetic core
Between utilization rate be substantially increased, considerably beyond the vertical space utilization rate around inductor core material and winding coil of annular.Specifically,
The lead material thickness of conductive coil is identical, umber of turn is identical and inductor outside dimensions under the same conditions, the application
The first coil 71 of disclosed inductor and the core volume of the second coil 72 winding are also greater than the magnetic core of toroidal inductor
Volume, therefore, the inductance of the inductance of inductor disclosed in the present application also greater than toroidal inductor.
Inductor disclosed in the present application is different from the round magnetic circuit that toroidal core is constituted.In one embodiment, magnetic circuit was by 2 pieces months
The uncoiled magnetic core in thread form two sides is combined into square shape magnetic structure, and the magnetic core of crescent with 2 pieces of rectangle coiling magnetic cores
Arc surface shape outer boundaries, constitute the maximum boundary size of inductor disclosed in the present application.It is vertical around inductor ruler with annular
It is very little to compare, the outer diameter around inductor vertical for the annular of same size, in order to guarantee the line of inductor disclosed in the present application
Core cross section product inside circle is greater than the vertical annulus magnetic core effective sectional area inside inductor of annular, upper and lower two square cores
Flat type copper wire made of coiling founds coiling, after being assembled into inductor of the invention, the catercorner length of two coils outside column
L, no more than 1.2 times of the diameter length D for being formed by arc profile by two pieces of crescent magnetic cores.In one embodiment, for leading
The same cross-sectional area of the copper wire of electric coil winding, constituting to connect on two coil electrics up and down of inductor disclosed in the present application makes
With to obtain, annular vertical inductance around inductor vertical under sectional area of wire much larger than identical.Meanwhile in above-mentioned condition
Under, such as use identical core material, inductor disclosed in the present application under current DC bias state, inductance also greater than
The vertical direct current biasing inductance around inductor of annular, and the core material as used is different, due to inductance disclosed in the present application
The increase of the magnetic core effective area of device, the magnetic material in Novel inductor, easily saturation poor even with direct current biasing characteristic
Magnetic material, it is vertical around inductor to substitute the annular constituted using the good material of direct current biasing characteristic, can keep it
Electric parameter remains unchanged substantially.
Inductor disclosed in the present application substitutes the vertical physical space around inductor of the annular of same size, is obtained with reaching
For the purpose of more big inductance quantity, same principle, the present invention can be by keeping founding electricity identical around inductance with the annular of same size
Sensibility reciprocal ability reduces coil total number of turns, carries out winding with the conducting wire of thicker sectional area, it is more high-power can to obtain identical inductances amount
The implementation form of the inductor of density.
Further, though inductor disclosed in the present application is to replace for the annular vertical physical space around inductance of same size
Generation, so that the size of inductor disclosed in the present application circle close as far as possible, in order to further enhance inductor disclosed in the present application
Inductance, coil can be enable to obtain more winding spaces with the length of further elongation coil inside magnetic core column, thus
More coil turns are obtained, bigger inductance is obtained, novel inductor approximate circle at this time becomes presentation approximate ellipsoidal
New implementation form, under the implementation form, when being mounted in parallel arrangement especially for multiple inductance, as shown in figure 9, real for one
Apply oval inductor and toroidal inductor space arrangement schematic diagram in example, the inductance of ellipse implementation form disclosed in the present application
Device can further promote the space utilization rate of inductance installation.
The application discloses a kind of inductor, including identical first magnetic core column and the second magnetic core column, identical first magnetic core
Valve and the second magnetic core valve.Since the core structure to inductor optimizes, especially by core material shape, coiling
The optimization design of structure, in identical winding wire thickness, identical umber of turn, for founding circular electric identical around inductance with annular
Under the conditions of feeling outside dimension, significantly increase the effective sectional area of core material.Due to constituting the effective sectional area of flux circuit
It dramatically increases, for the inductance of same core material, inductance realizes the equal ratios in company with its core material effective sectional area
Example increases, that is to say, that is being equal in the vertical identical volume profiles around inductor of original annular, even with same original
The vertical flat copper wire around the same size of inductor of annular sectional area, pass through profiling path, the inductor magnetic circuit of optimization magnetic circuit
The core shapes and size of different parts obviously increase the inductance ability of inductor disclosed in the present application.Because of the application public affairs
The magnetic core for the inductor opened is separate structure, convenient for the mass production of inductor, and then reduces production cost.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (10)
1. a kind of inductor, which is characterized in that including identical first magnetic core column and the second magnetic core column, identical first magnetic core valve
With the second magnetic core valve；
The first magnetic core valve and the second magnetic core valve are respectively provided with two opposite sides, and the bottom surface to connect and circular arc
Face；
The first magnetic core column and the second magnetic core column are all wound with conductive coil；Wherein the first magnetic core column is wound
A terminal of the one end of conductive coil as inductor, the other end for the conductive coil that the first magnetic core column is wound and institute
State one end connection for the conductive coil that the second magnetic core column is wound, the other end for the conductive coil that the first magnetic core column is wound
Another terminal as inductor；
The first magnetic core valve and the second magnetic core valve are arranged in the opposite mode in bottom surface, the first magnetic core column and described
Two magnetic core columns are arranged side by side among the first magnetic core valve and the second magnetic core valve, so that the first magnetic core column and institute
The end face for stating the second magnetic core column is in contact with the bottom surface of the first magnetic core valve and the second magnetic core valve respectively.
2. inductor as described in claim 1, which is characterized in that the first magnetic core column and the second magnetic core column are rectangular
Body or cylindrical body.
3. inductor as described in claim 1, which is characterized in that the outside of the first magnetic core column and the second magnetic core column
Edge rounded corner.
4. inductor as described in claim 1, which is characterized in that the bottom surface of the first magnetic core valve and the second magnetic core valve
Edge rounded corner between arc surface.
5. inductor as described in claim 1, which is characterized in that the end face of the first magnetic core column and the second magnetic core column
It is slightly less than the half of the bottom surface of the first magnetic core valve and the second magnetic core valve.
6. inductor as described in claim 1, which is characterized in that in the first magnetic core valve and the second magnetic core valve at least
One air gap is set；And/or an air gap is at least set in the first magnetic core column and the second magnetic core column.
7. inductor as described in claim 1, which is characterized in that the winding side of the conductive coil of winding the first magnetic core column
To identical as the winding direction of conductive coil for winding the second magnetic core column；
Or,
Wind the winding direction of the conductive coil of the first magnetic core column and twining for the conductive coil for winding the second magnetic core column
It is not identical around direction.
8. inductor as described in claim 1, which is characterized in that the conductive coil is that flat wire founds coiling.
9. inductor as described in claim 1, which is characterized in that on the middle axial plane of the inductor, the conductive coil
The maximum distance of outer is no more than the maximum distance between the first magnetic core valve and the arc surface of the second magnetic core valve.
10. inductor as described in claim 1, which is characterized in that the magnetic core of the inductor is ferrite, including nickel zinc iron
At least one of oxysome or manganese-zinc ferrite, MgZn ferrite.
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|---|---|---|---|
| CN201910116606.4A CN109686539A (en) | 2019-02-15 | 2019-02-15 | A kind of inductor |
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| CN201910116606.4A CN109686539A (en) | 2019-02-15 | 2019-02-15 | A kind of inductor |
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Family
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11264164B2 (en) | 2019-11-18 | 2022-03-01 | Ford Global Technologies, Llc | Cooling system for an inductor in a power supply device of a hybrid/electric vehicle |
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| AT310868B (en) * | 1971-09-16 | 1973-10-25 | Esslinger Spezielektra | Low-noise high-voltage plunger coil, especially for earth fault quenching |
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| US11264164B2 (en) | 2019-11-18 | 2022-03-01 | Ford Global Technologies, Llc | Cooling system for an inductor in a power supply device of a hybrid/electric vehicle |
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Application publication date: 20190426 |