CN105610253A - Motor for compressor and compressor with motor - Google Patents
Motor for compressor and compressor with motor Download PDFInfo
- Publication number
- CN105610253A CN105610253A CN201610090112.XA CN201610090112A CN105610253A CN 105610253 A CN105610253 A CN 105610253A CN 201610090112 A CN201610090112 A CN 201610090112A CN 105610253 A CN105610253 A CN 105610253A
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- stator
- core
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- compressor
- motor
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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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a motor for a compressor and the compressor with the motor. The motor comprises a stator core, a stator winding and a rotor core, wherein the stator core is formed by superposing a plurality of stator iron plates; the thickness of each stator iron plate is theta; theta is smaller than or equal to 0.35mm; the rotor core is sleeved with the stator core and can rotate oppositely to the stator core; the rotor core comprises a plurality of magnet slots which are arranged at intervals along the circumferential direction; each magnet slot extends along the axial direction of the rotor core; a magnetic part is arranged in each magnet slot; the rotor core is formed by superposing a plurality of rotor iron plates; the thickness of each rotor iron plate is delta; delta is smaller than or equal to 0.35mm; the residual magnetism Br of each magnetic part at 20 DEG C meets the relational expression: Br is greater than or equal to 1.35T; the iron-loss values per unit weight of the stator iron plates and the rotor iron plates under the conditions that the frequency is 50HZ, the waveform is sine and a magnetic induction peak is 1.5T are smaller than 3.0W/kg. According to the motor for the compressor disclosed by the embodiment of the invention, the target of reducing the copper loss can be achieved; the motor efficiency is improved; and the cost performance of the motor is improved.
Description
Technical field
The present invention relates to Compressor Technology field, more specifically, relate to a kind of electric moto used in compressor and there is its compressor.
Background technology
The brushless motor of burying permanent magnet in rotor underground is widely used in the household electrical appliances necks such as compressor of air conditioner because of its higher efficiencyIn territory. But the efficiency of motor is difficult to get a promotion, its main cause is because the loss that copper loss and iron loss cause cannot obtainTo suppressing. Particularly, the efficiency of motor depends on the loss combining after copper loss and iron loss. If consider with loss,When the facewidth of stator tooth hour, the loss being caused by copper loss accounts for leading, in the time that the facewidth is larger, the loss being caused by iron lossAccount for leading. In current field of household appliances, electric efficiency has been accomplished higher level, in design, has reached copper loss and ironNo matter damage the stage of balance, now by changing stator punching shape, be to reduce copper loss or iron loss, all can cause another kindThe rising of loss, finally all cannot reach the lifting of electric efficiency.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique. For this reason, the present invention proposes oneKind of electric moto used in compressor, this electric moto used in compressor simple in structure, electric efficiency is high, and cost performance is high.
The present invention also proposes a kind of compressor with above-mentioned compressor motor.
According to the electric moto used in compressor of first aspect present invention embodiment, comprising: stator core, described stator core has manyIndividual along its circumferential stator tooth arranged spaced apart, between adjacent two described stator tooths, limit stator slot, described stator coreForm by multiple stator iron plates are stacked, the thickness of each described stator iron plate is θ, θ≤0.35mm; Stator winding, described inStator winding winding is on described stator tooth; Rotor core, described rotor core be set in described stator core and with respect toDescribed stator core is rotatable, and described rotor core has multiple along its circumferential magnet groove arranged spaced apart, each described magneticMetal trough along described rotor core extend axially and each described magnet groove in be respectively equipped with magnetic part, described rotor core is by manyStacked the forming of individual rotor iron plate, the thickness of each described rotor iron plate is δ, δ≤0.35mm, each described magnetic part is at 20 DEG CUnder remanent magnetism Br meet relational expression: Br >=1.35T, described stator iron plate and described rotor iron plate respectively frequency be 50HZ,Waveform is that sinusoidal magnetic strength peak value is that Unit Weight core loss value under 1.5T is less than 3.0W/kg.
According to the electric moto used in compressor of the embodiment of the present invention, by adopting rotor iron plate and the stator iron plate and surplus that thickness of slab is lessThe magnetic part that magnetic is higher, can realize the object that reduces copper loss, thereby improve electric efficiency, the significantly sexual valence of lifting motorRatio. This motor simple in structure, electric efficiency is high, and cost performance is high.
In addition, according to the electric moto used in compressor of the embodiment of the present invention, can also there is following additional technical characterictic:
According to one embodiment of present invention, the coil pitch of described stator winding is 1.
According to one embodiment of present invention, the thickness θ of each described stator iron plate is 0.35mm, each described rotor iron plateThickness δ be 0.35mm.
According to one embodiment of present invention, the each described magnetic part remanent magnetism Br at 20 DEG C is 1.38T.
According to one embodiment of present invention, the nominal torque of described motor is Tn, and rated speed is n, Tn≤4.5N.m, n≤150rpm。
According to one embodiment of present invention, the axial length of described stator core is L1, and the external diameter of described stator core is D1,L1≤45mm, and L1/D1≤0.55.
According to one embodiment of present invention, the axial length of described rotor core is L2, and the external diameter of described rotor core is D2,0.5≤L2/D2≤1。
According to one embodiment of present invention, described magnetic part is L3 along the axial length of described rotor core, L2/L3 >=1.
According to the compressor of second aspect present invention embodiment, comprise according to the electric moto used in compressor described in above-described embodiment.
Additional aspect of the present invention and advantage in the following description part provide, and part will become bright from the following descriptionAobvious, or recognize by practice of the present invention.
Brief description of the drawings
Fig. 1 is according to the structural representation of the electric moto used in compressor of the embodiment of the present invention;
Fig. 2 is with the axial length of stator core and stator core according to the efficiency of the electric moto used in compressor of the embodiment of the present inventionThe curve map that the ratio (L1/D1) of external diameter changes;
Fig. 3 is with the axial length of rotor core and rotor core according to the efficiency of the electric moto used in compressor of the embodiment of the present inventionThe curve map that the ratio (L2/D2) of external diameter changes.
Reference numeral:
100: motor;
11: stator core; 111: stator tooth; 112: stator slot; 113: through hole;
12: rotor core; 121: magnet groove; 122: magnetic part.
Detailed description of the invention
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings. Below by with reference to accompanying drawingThe embodiment describing is exemplary, is intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
Specifically describe according to the electric moto used in compressor 100 of first aspect present invention embodiment below in conjunction with accompanying drawing 1 to Fig. 3.
Comprise stator core 11, stator winding (not shown) and rotor according to the electric moto used in compressor 100 of the embodiment of the present inventionIron core 12. Particularly, stator core 11 has multiple along its circumferential stator tooth 111 arranged spaced apart, determines for adjacent twoBetween sub-tooth 111, limit stator slot 112, stator core 11 forms by multiple stator iron plates are stacked, each stator iron plateThickness is θ, θ≤0.35mm, and stator winding winding is on stator tooth 111, and rotor core 12 is set in stator core 11Interior and rotatable with respect to stator core 11, rotor core 12 has multiple along its circumferential magnet groove 121 arranged spaced apart,Each magnet groove 121 along rotor core 12 extend axially and each magnet groove 121 in be respectively equipped with magnetic part 122, rotorIron core 12 is by stacked the forming of multiple rotor iron plates, and the thickness of each rotor iron plate is δ, δ≤0.35mm.
Particularly, stator core 11 has multiple along its circumferential stator tooth 111 arranged spaced apart, adjacent two stator tooths 111Between limit stator slot 112, rotor core 12 is set on stator core 11 and is rotatable with respect to stator core 11,Rotor core 12 has multiple along its circumferential magnet groove 121 arranged spaced apart, and each magnet groove 121 is along rotor core 12Extend axially and each magnet groove 121 in be respectively equipped with magnetic part 122. Alternatively, rotor core 12 is by multiple rotor ironPlate is stacked to be formed, and stator core 11 forms by multiple stator iron plates are stacked, and, each rotor iron plate and each stator iron plateThickness be all less than or equal to 0.35mm.
As shown in Figure 1, in the present embodiment, the number of magnetic poles of having enumerated magnetic part 122 is the motor 100 of 6. Wherein,In stator core 11, be limited with along its axially extended through hole 113, each stator slot 112 is communicated with through hole 113, rotor ironCore 12 is located in the through hole 113 of stator core 11 rotationally, and the lateral wall of rotor core 12 and stator core 11Madial wall between limit gap. Preferably, six magnetic parts 122 are circumferentially uniformly distributed along rotor core 12, rotorSeparating equally spaced alternate configurations mode in a circumferential direction with the S utmost point and the N utmost point remains on the magnet iron piece of multiple number of magnetic poles to turnThe week of sub-iron core 12 upwards.
Further, the remanent magnetism Br of each magnetic part 122 at 20 DEG C meets relational expression: Br >=1.35T, stator iron plate andRotor iron plate is that 50HZ, waveform are that sinusoidal magnetic strength peak value is that Unit Weight core loss value under 1.5T is less than in frequency respectively3.0W/kg。
Thus, according to the electric moto used in compressor 100 of the embodiment of the present invention, by adopting less rotor iron plate and the stator iron of thickness of slabThe magnetic part 122 that plate and remanent magnetism are higher, can realize the object that reduces copper loss, thereby improve motor 100 efficiency, largeThe cost performance of width lifting motor 100. This motor 100 simple in structure, electric efficiency is high, and cost performance is high.
In detailed description of the invention more of the present invention, the quantity of having enumerated stator tooth 111 is 9, the coil of stator windingPitch is 1 motor 100. Particularly, stator core 11 comprises yoke and 111, nine stators of nine stator tooths of ring-typeTooth 111 from yoke inwardly side-prominent, equally spaced distribution of week in a circumferential direction, the stator winding of reeling on stator tooth 111,Preferably, stator winding adopts concentrates the winding of volume winding method on stator core 11, i.e. the pitch Y=1 of stator winding. ShouldMotor 100 simple in structure, the winding method processing ease of stator winding, the efficiency of motor 100 is high, cost performance is high.
Preferably, according to one embodiment of present invention, the thickness θ of each stator iron plate is 0.35mm, each rotor iron plateThickness δ be 0.35mm. With reference to figure 1, in the present embodiment, rotor iron plate and stator iron plate respectively by electromagnetic steel plate systemBecome, thickness t is 0.35mm, for the manufacture of the electromagnetic steel plate P1.5/50 of stator iron plate and rotor iron plate (frequency be 50Hz,Magnetic strength peak value is the core loss value under 1.5T) be 3.0W/kg, it is the magnet of 1.35T that magnetic part 122 adopts remanent magnetism, intrinsic rectifyingStupid power Hcj is 1900kA/m. The motor 100 of being made up of stator iron plate and the rotor iron plate of this thickness can be realized reduction copper lossObject, thereby improved motor 100 efficiency, the significantly cost performance of lifting motor 100.
Alternatively, according to one embodiment of present invention, the remanent magnetism Br of each magnetic part 122 at 20 DEG C is 1.38T. CauseFor the remanent magnetism of magnetic part 122 improves, be provided to magnetic induction intensity and all corresponding increases of total magnetic flux of 11 li of stator cores, fixedThe counter electromotive force of responding in sub-winding also can correspondingly promote, same, and the torque of stator current output increases, and is requiring output sameIn the situation of sample torque, the electric current that stator needs just can decline, and the copper loss being produced by stator current has also declined. Exist simultaneouslyIn the situation that total specified output torque does not increase, due to the decline of copper loss, and due to the increase of magnetic flux, iron loss also presents increasingThe trend adding, now can by reduce the axial length of stator core 11 of motor 100 ensure motor 100 performance andCost performance, the utilization rate of raising magnet and silicon steel material.
In detailed description of the invention more of the present invention, the nominal torque of motor 100 is Tn, and rated speed is n, Tn≤4.5N.m, n≤150rpm. Wherein, the axial length of stator core 11 is L1, and the external diameter of stator core 11 is D1, L1≤ 45mm, and L1/D1≤0.55. Motor 100 within the scope of this size relationship work limitation rate under rated condition is higher,Cost performance is high.
Particularly, because the iron loss in iron core mainly comprises magnetic hystersis loss and eddy-current loss, under certain output torque condition,The constraint of the long-pending thick and stator outer diameter ratio by the long-pending thick and stator core 11 to stator core 11, can effectively suppress whirlpoolStream loss, thus iron loss suppressed, thus improve the efficiency of motor 100. And along with the remanent magnetism Br of magnetic part 122 improves, fixedSon induction counter electromotive force can promote, and exporting the needed electric current of same torque can decline, and the copper loss that stator current produces alsoDecline.
But under same rotational speed f, iron loss Pfe changes with the variation of magnetic induction density B, when magnetic part 122Remanent magnetism Br improve, in stator core 11, the magnetic induction intensity of tooth, yoke portion can become greatly, causes iron loss Pfe increase. MagnetRemanent magnetism Br promotes the decline that not necessarily can bring overall losses, therefore under certain moment of torsion output condition, pass through stator coreThe constraint of the long-pending thick and stator outer diameter ratio of 11 long-pending thick and stator core 11 can make up this shortcoming. Thus, according to thisThe motor 100 of inventive embodiments, by the long-pending thick and stator outer diameter ratio of the long-pending thick and stator core 11 to stator core 11Being used in conjunction with of the magnetic part 122 that value and remanent magnetism are higher, has realized the balance of copper loss and iron loss, has significantly promoted motor 100Cost performance.
For example, the axial length L 1 of stator core 11 is that the external diameter of 45mm, stator core 11 is 90mm, L1/D1=0.5.Fig. 2 is motor 100 efficiency charts that represent the motor 100 of present embodiment, and L1/ (D1) is made as to transverse axis, will be to comparingMotor 100 efficiency when value are as the longitudinal axis, and this figure has illustrated that L1/ (D1) ratio is changed to the motor 100 of 1.0 o'clock from 0.3Efficiency. Known according to Fig. 2, when present embodiment L1/ (D1) ratio is 0.55 when above, the efficiency curve of motor 100Through maintaining an equal level or presenting downward trend, motor 100 cost performances decline. Therefore under specified service condition, the electricity of the embodiment of the present inventionAxial length L 1 and the L1/D1 ratio of the stator core 11 of machine 100 preferably meet relational expression: L1≤45mm and L1/D1≤0.55。
And according to one embodiment of present invention, the axial length of rotor core 12 is L2, the external diameter of rotor core 12 is D2,0.5≤L2/D2≤1. The efficiency of the motor 100 within the scope of this size relationship is high, and cost performance is high.
For example, the axial length L 2 of rotor core 12 is that 46mm, rotor core 12 external diameters are 47.4mm, L2/D2 ≈ 0.97.Fig. 3 is the figure that represents the efficiency of the motor 100 of present embodiment. By the axial length L of rotor core 12 2 and rotor coreThe ratio L2/D2 of 12 outer diameter D 2 is as transverse axis, motor 100 efficiency when changing the two ratio (L2/D2) asThe longitudinal axis, shows ratio and is changed to motor 100 efficiency of 1.3 o'clock from 0.3. Known according to Fig. 3, when present embodimentThe ratio (L2/D2) of motor 100 is for being greater than at 1.0 o'clock, and motor 100 efficiency of present embodiment maintain an equal level or be on a declining curve.In addition, when ratio is in the scope of 0.5≤L2/D2≤1.0 time, motor 100 efficiency of present embodiment are outside this scopeEfficiency have obvious lifting, cost performance optimum. Therefore under these circumstances, particularly preferably ratio meets relational expression: 0.5≤L2/D2≤1.0。
Thus, by adopting the higher magnetic part 122 of remanent magnetism, the physical dimension of motor 100 is carried out to Proper Match simultaneously, makeMust be when copper loss decline, iron loss does not significantly increase, and has realized the balance of copper loss and iron loss, thereby has improved motor 100Efficiency, the significantly cost performance of lifting motor 100.
Further, magnetic part 122 is L3 along the axial length of rotor core 12, L2/L3 >=1. That is to say magneticPart 122 is located in the magnet groove 121 of rotor core 12, and the axial length of magnetic part 122 is less than or equal to rotor core12 axial length. Thus, by rotor core 12 and the axial length of magnetic part 122 are carried out to Proper Match, canGreatly improve the brow leakage of motor 100, improved the profit of the silicon steel material of magnetic part 122 materials and rotor core 12By rate, thus efficiency and the cost performance of raising motor 100.
Alternatively, according to one embodiment of present invention, the cross sectional shape of each magnet groove 121 forms in-line, V-arrangement, UShape or W shape. With reference to figure 1, in the present embodiment, in rotor core 12, there are six magnet grooves 121, each magnet groove 121Cross sectional shape all form in-line. Wherein, the concrete shape of magnet groove 121 can specifically arrange according to actual requirement, thisConcrete restriction is not done in invention to this.
According to the compressor of second aspect present invention embodiment, comprise the electric moto used in compressor 100 according to above-described embodiment. Due toThere is above-mentioned technique effect according to the electric moto used in compressor 100 of the embodiment of the present invention, therefore, according to the pressure of the embodiment of the present applicationContracting machine also has above-mentioned technique effect, and this compressor is simple in structure, and stock utilization is high, and cost performance is high.
All for those of ordinary skills according to other formations of the compressor of the embodiment of the present invention and operationKnow, be not described in detail here.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width "," thickness ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior "," outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferentially " etc. instruction orientation or position relationship be based onOrientation shown in the drawings or position relationship, be only the present invention for convenience of description and simplified characterization, instead of instruction or hint instituteThe device referring to or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as thisBright restriction.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importanceOr the implicit quantity that indicates indicated technical characterictic. Thus, the feature that is limited with " first ", " second " can be expressedOr impliedly comprise at least one this feature. In description of the invention, the implication of " multiple " is at least two, for example twoIndividual, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixing "Should be interpreted broadly Deng term, for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can beMechanical connection can be also electrical connection or each other can communication; Can be to be directly connected, also can pass through the indirect phase of intermediaryConnecting, can be the connection of two element internals or the interaction relationship of two elements, unless separately there is clear and definite restriction. ForThose of ordinary skill in the art, can understand above-mentioned term concrete meaning in the present invention as the case may be.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score canBeing that the first and second features directly contact, or the first and second features are by intermediary mediate contact. And, theOne feature Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic orOblique upper, or only represent that First Characteristic level height is higher than Second Characteristic. First Characteristic Second Characteristic " under "," below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represents the first spyLevy level height and be less than Second Characteristic.
In the description of this description, reference term " embodiment ", " some embodiment ", " example ", " concrete example ",Or the description of " some examples " etc. means specific features, structure, material or the feature described in conjunction with this embodiment or exampleBe contained at least one embodiment of the present invention or example. In this manual, needn't to the schematic statement of above-mentioned termMust for be identical embodiment or example. And specific features, structure, material or the feature of description can be in officeIn one or more embodiment or example with suitable mode combination. In addition, not conflicting in the situation that, this areaTechnical staff can tie the feature of the different embodiment that describe in this description or example and different embodiment or exampleClose and combine.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary,Can not be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodimentChange, amendment, replacement and modification.
Claims (9)
1. an electric moto used in compressor, is characterized in that, comprising:
Stator core, described stator core has multiple along its circumferential stator tooth arranged spaced apart, adjacent two described statorsBetween tooth, limit stator slot, described stator core forms by multiple stator iron plates are stacked, the thickness of each described stator iron plateFor θ, θ≤0.35mm;
Stator winding, described stator winding winding is on described stator tooth;
Rotor core, it is interior and rotatable with respect to described stator core that described rotor core is set in described stator core, described inRotor core has multiple along its circumferential magnet groove arranged spaced apart, and each described magnet groove is axial along described rotor coreIn extension and each described magnet groove, be respectively equipped with magnetic part, described rotor core is by stacked the forming of multiple rotor iron plates, eachThe thickness of described rotor iron plate is δ, δ≤0.35mm, and the remanent magnetism Br of each described magnetic part at 20 DEG C meets relational expression:Br≥1.35T，
Described stator iron plate and described rotor iron plate are that 50HZ, waveform are that sinusoidal magnetic strength peak value is under 1.5T in frequency respectivelyUnit Weight core loss value is less than 3.0W/kg.
2. electric moto used in compressor according to claim 1, is characterized in that, the coil pitch of described stator winding is 1.
3. electric moto used in compressor according to claim 2, is characterized in that, the thickness θ of each described stator iron plate is0.35mm, the thickness δ of each described rotor iron plate is 0.35mm.
4. electric moto used in compressor according to claim 2, is characterized in that, each described magnetic part remaining at 20 DEG CMagnetic Br is 1.38T.
5. according to the electric moto used in compressor described in any one in claim 1-4, it is characterized in that, the specified of described motor turnsSquare is Tn, and rated speed is n, Tn≤4.5N.m, n≤150rpm.
6. electric moto used in compressor according to claim 5, is characterized in that, the axial length of described stator core is L1,The external diameter of described stator core is D1, L1≤45mm, and L1/D1≤0.55.
7. electric moto used in compressor according to claim 6, is characterized in that, the axial length of described rotor core is L2,The external diameter of described rotor core is D2,0.5≤L2/D2≤1.
8. electric moto used in compressor according to claim 7, is characterized in that, described magnetic part is along described rotor coreAxial length is L3, L2/L3 >=1.
9. a compressor, is characterized in that, comprises according to the electric moto used in compressor described in any one in claim 1-8.
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| CN201610090112.XA CN105610253B (en) | 2016-02-17 | 2016-02-17 | Electric moto used in compressor and compressor with it |
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| CN201610090112.XA CN105610253B (en) | 2016-02-17 | 2016-02-17 | Electric moto used in compressor and compressor with it |
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| CN105610253A true CN105610253A (en) | 2016-05-25 |
| CN105610253B CN105610253B (en) | 2018-11-23 |
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| CN106992648A (en) * | 2017-05-26 | 2017-07-28 | 广东美芝制冷设备有限公司 | Core structure, motor, compressor and refrigeration plant |
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| JP2021516949A (en) * | 2018-03-29 | 2021-07-08 | 広東美芝制冷設備有限公司 | Motors, compressors and cooling devices |
| CN110768408A (en) * | 2018-07-27 | 2020-02-07 | 广东美芝制冷设备有限公司 | Air conditioner, compressor and motor for rotary compressor |
| CN113738645A (en) * | 2020-05-29 | 2021-12-03 | 广东美芝精密制造有限公司 | Compressor and air conditioning system |
| CN113738645B (en) * | 2020-05-29 | 2023-03-14 | 广东美芝精密制造有限公司 | Compressor and air conditioning system |
| CN113328543A (en) * | 2021-06-19 | 2021-08-31 | 江苏聚磁电驱动科技有限公司 | High-grade permanent magnet motor with multilayer winding structure |
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| CN105610253B (en) | 2018-11-23 |
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