CN108880050A - A kind of brushless DC motor stator method for winding - Google Patents
A kind of brushless DC motor stator method for winding Download PDFInfo
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- CN108880050A CN108880050A CN201810982206.7A CN201810982206A CN108880050A CN 108880050 A CN108880050 A CN 108880050A CN 201810982206 A CN201810982206 A CN 201810982206A CN 108880050 A CN108880050 A CN 108880050A
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/08—Forming windings by laying conductors into or around core parts
- H02K15/085—Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
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- Windings For Motors And Generators (AREA)
Abstract
The present invention relates to electric machine winding fields, especially a kind of brushless DC motor stator method for winding, including end of incoming cables and leading-out terminal, end of incoming cables is in parallel two-by-two to form three-phase, and U phase is held, V phase is held and W phase is held, leading-out terminal uses delta connection, the stator winding includes two groups of coils, the main coil of one group of offer power, the auxiliary winding of one group of offer component, major-minor parallel connection of coil, and all use delta connection.Beneficial effect：The present invention uses double-layer concentric winding, two-way in parallel, delta connection, the design of major-minor two groups of coils, wherein main coil provides power, auxiliary winding provides component, effectively weakens the cogging torque generated by rotor permanent magnet and the interaction of stator tooth socket, reduces the vibration and noise of motor, the cogging torque for efficiently solving conventional motors crosses ambassador's motor and the fluctuation of speed occurs, the problem of being unable to even running, while making motor generate vibration and noise, influencing the normal use of generator.
Description
Technical field
The present invention relates to electric machine winding fields, and in particular to a kind of brushless DC motor stator method for winding.
Background technique
Brushless direct current motor armature core there will necessarily be tooth and slot to place stator winding, due to the presence of tooth socket,
Cause the uneven of air gap, the magnetic flux Relatively centralized in a tooth pitch is in teeth portion, so that air-gap permeance is not constant.When rotor revolves
When turning, the energy storage of air-gap field just changes, and generates cogging torque, it is the object by motor itself that this torque, which is constant,
It manages caused by structure, even if not having electric current in stator winding, this torque is still remained；It is related with rotor-position, thus
As rotor-position changes, just cause torque pulsation, cogging torque, which crosses conference, makes motor the fluctuation of speed occur, makes motor not
Energy even running, influences the performance of motor, while motor being made to generate vibration and noise, influences the normal use of generator.Becoming
Speed driving in, when torque pulsation frequency is consistent with the mechanical resonance frequency of stator or rotor, cogging torque generate vibration with
Noise will be amplified.The presence of cogging torque equally affects low-speed performance and position control of the motor in speed control system
High accuracy positioning in system, the method that tradition reduces cogging torque has very much, such as skewed-rotor, rotor eccentricity, closed slot
The modes such as method, but these modes there are difficulty or have higher cost in technique mostly, and this makes these methods can not
It is widely used.
Summary of the invention
The technical problem to be solved by the present invention is to：Conference, which is crossed, in order to solve cogging torque makes motor the fluctuation of speed occur, no
Energy even running, influences the performance of motor, while motor being made to generate vibration and noise, influences asking for the normal use of generator
Topic, the present invention provides a kind of brushless DC motor stator method for winding, including end of incoming cables and leading-out terminal, end of incoming cables is two-by-two simultaneously
Connection forms three-phase, and U phase is held, V phase is held and W phase is held, and leading-out terminal uses delta connection, which includes two groups of coils,
The main coil of one group of offer power, the auxiliary winding of one group of offer component, major-minor parallel connection of coil, and all use delta connection
Technical solution, since auxiliary winding provides a component, thus effectively weaken main coil intrinsic cogging torque, reduce electricity
The vibration and noise of machine.
The technical solution adopted by the present invention to solve the technical problems is：A kind of brushless DC motor stator method for winding,
Including end of incoming cables and leading-out terminal, the end of incoming cables is in parallel two-by-two to form three-phase, and U phase is held, V phase is held and W phase is held, the outlet
End uses delta connection, which includes two groups of coils, the main coil of one group of offer power, one group of offer component it is auxiliary
Coil, major-minor parallel connection of coil, and all use delta connection.Present design provides a kind of double-layer concentric winding,
Two-way in parallel, delta connection.The stator winding design of major-minor two groups of coils, wherein main coil provides power, and auxiliary winding provides
Cut down the component of cogging torque；Magnetic pole is formed to distinguish with stator winding, it belongs to multitudinous pole formula winding；With the shape of stator winding
Him, which is distinguished, with embedded wire laying mode belongs to distributed winding.It effectively weakens the intrinsic cogging torque of main coil, reduces motor
Vibration and noise, the cogging torque for efficiently solving conventional motors crosses ambassador's motor and the fluctuation of speed occurs, be unable to even running,
The problem of making motor generate vibration and noise simultaneously, influencing the normal use of generator.
Specifically, the U phase is held, V phase is held and W phase hold respectively include main coil U V W and auxiliary winding U V W
Xiang Duan, the U phase of main coil and the U of auxiliary winding are in parallel, and the V phase of main coil and the V of auxiliary winding are in parallel, the W phase of main coil and
Auxiliary winding is in parallel.
Specifically, main coil is multiturn coil, every group of the number of turns is determined that auxiliary winding is by stator slot width and copper wire specification
Single-turn circular coil, every phase winding of major-minor coil such as are at the number of turns winding.The quantity of secondary coil is directly proportional to component size, auxiliary winding
The number of turns is more, and the component of the reduction cogging torque provided is bigger.
Specifically, major-minor coil uses same size copper wire, the auxiliary winding is around between two main coils, and what is provided cuts
Subtract inclined 15 degree of active force that the component of cogging torque is provided with the main coil.
Specifically, stator is equipped with 12 wire casings, wherein 12 slots include 1 slot, 2 slots, 3 slots, 4 slots, 5 slots, 6 slots, 7 slots,
8 slots, 9 slots, 10 slots, 11 slots, 12 slots, wherein 6,3 tunnel of main coil the end of a thread, 6,3 tunnel of auxiliary winding the end of a thread.
Specifically, specific step is as follows for the mode of connection of the delta connection：
(1) main line enters from 1 slot, from 2 slots return, from 4 slots enter, from 5 slots return, from 7 slots enter, from 8 slots return, from 9 slots into
Enter, goes out from 10 slots；
(2) main line enters from 2 slots, from 3 slots return, from 5 slots enter, from 6 slots return, from 8 slots enter, from 9 slots return, from 10 slots into
Enter, goes out from 11 slots；
(3) main line enters from 3 slots, returns from 4 slots, enters from 6 slots, returns from 7 slots, enters from 9 slots, returns from 10 slots, from 11 slots
Into going out from 12 slots；
(4) subordinate line enters from 1 slot, from 3 slots return, from 4 slots enter, from 6 slots return, from 7 slots enter, from 9 slots return, from 10 slots into
Enter, goes out from 12 slots；
(5) subordinate line enters from 2 slots, returns from 4 slots, enters from 5 slots, returns from 7 slots, enters from 8 slots, returns from 10 slots, from 11 slots
Into going out from 1 slot；
(6) subordinate line enters from 3 slots, returns from 5 slots, enters from 6 slots, returns from 8 slots, enters from 9 slots, returns from 11 slots, from 12 slots
Into going out from 2 slots.
Specifically, main 1 slot end of incoming cables is U phase, 10 slot leading-out terminals are V phase, and main 2 slot ends of incoming cables are V phase, and 11 slot leading-out terminals are
W phase, main 3 slot ends of incoming cables are W phase, and 12 slot leading-out terminals are U phase.
Specifically, auxiliary 1 slot end of incoming cables is U phase, 11 slot leading-out terminals are V phase, and auxiliary 2 slot end of incoming cables is V phase, and 12 slot leading-out terminals are
W phase, auxiliary 3 slot end of incoming cables are W phase, and 1 slot leading-out terminal is U phase.Auxiliary winding method for winding is by U, V, W phase coil weight of conventional motors
It newly is divided into U-V, V-W, W-U phase sees U-V, V-W, W-U as a tooth, and auxiliary winding is around between two main coils, subordinate line
What circle provided cuts down inclined 15 degree of active force that cogging torque component and the main coil provide, and offsets part cogging torque, reduces
The vibration and noise of motor guarantees motor even running.
Specifically, main 1 slot is connected in parallel with auxiliary 1 slot end of incoming cables, main 10 slot leading-out terminals are connected in parallel with auxiliary 11 slot leading-out terminal；
Main 2 slots are connected in parallel with auxiliary 2 slot end of incoming cables, and main 11 slot leading-out terminals are connected in parallel with auxiliary 12 slot leading-out terminal；Main 3 slots and auxiliary 3 slot into
Line end is connected in parallel, and main 12 slot leading-out terminals are connected in parallel with auxiliary 1 slot leading-out terminal.
The beneficial effects of the invention are as follows：The present invention provides a kind of brushless DC motor stator method for winding, including inlet wire
End and leading-out terminal, the end of incoming cables is in parallel two-by-two to form three-phase, and U phase is held, V phase is held and W phase is held, and the leading-out terminal uses three
Angular connection, the stator winding include two groups of coils, the main coil of one group of offer power, the auxiliary winding of one group of offer component, master
Auxiliary winding is connected in parallel, and all uses the technical solution of delta connection, is solved because inherently cogging torque is excessive for motor
Cause motor the fluctuation of speed occur, be unable to even running, influence the performance of motor, while motor being made to generate vibration and noise, shadow
The problem of ringing the normal use of generator, since main coil provides major impetus, auxiliary winding provides one and inclined 15 degree of active force
Component to offset or reduce the cogging torque of conventional motors, therefore has reached the technology for reducing the vibration and noise of motor
Effect.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is main coil winding structure schematic diagram of the present invention；
Fig. 2 is auxiliary winding winding structure schematic diagram of the present invention；
Fig. 3 is the major-minor final winding structure schematic diagram of two groups of coils of the present invention；
Fig. 4 is that main coil of the present invention acts on lower magnetic shoe stress condition schematic diagram；
Fig. 5 is that auxiliary winding of the present invention acts on lower magnetic shoe stress condition schematic diagram；
Fig. 6 is that main coil of the present invention acts on lower torque ripple analogous diagram；
Fig. 7 is torque ripple analogous diagram under the major-minor coil collective effect of the present invention；
Remarks：Delta connection of the present invention is △ type connection；Arrow on Fig. 4, Fig. 5 coil indicates electric current side
To arrow indicates direction of motor rotation right above figure.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
Embodiment 1：
As shown in figure 3, a kind of brushless DC motor stator method for winding, including end of incoming cables and leading-out terminal, end of incoming cables two
Two formation three-phases in parallel, U phase is held, V phase is held and W phase is held, and leading-out terminal uses delta connection, which includes two groups of lines
Circle, the main coil of one group of offer power, the auxiliary winding of the component of one group of offer reduction cogging torque, major-minor parallel connection of coil,
And all use delta connection.U phase is held, V phase is held and W phase hold respectively include main coil U V W and auxiliary winding U V W
Xiang Duan, the U phase of main coil and the U of auxiliary winding are in parallel, and the V phase of main coil and the V of auxiliary winding are in parallel, the W phase of main coil and
Auxiliary winding is in parallel.Stator is equipped with 12 wire casings, wherein 12 slots include 1 slot, 2 slots, 3 slots, 4 slots, 5 slots, 6 slots, 7 slots, 8
Slot, 9 slots, 10 slots, 11 slots, 12 slots, wherein 6,3 tunnel of main coil the end of a thread, 6,3 tunnel of auxiliary winding the end of a thread.Main coil is multiturn coil,
Every group of the number of turns is determined that auxiliary winding is single-turn circular coil by stator slot width and copper wire specification, and every phase winding of major-minor coil is
Etc. the number of turns winding.Major-minor coil uses same size copper wire, and auxiliary winding is around between two main coils, and the reduction tooth socket provided turns
There is provided inclined 15 degree of active force of square component and the main coil.
Specific step is as follows for the mode of connection of delta connection：
(1) main line enters from 1 slot, from 2 slots return, from 4 slots enter, from 5 slots return, from 7 slots enter, from 8 slots return, from 9 slots into
Enter, goes out from 10 slots；(2) main line enters from 2 slots, returns from 3 slots, enters from 5 slots, returns from 6 slots, enters from 8 slots, returns from 9 slots, from 10
Slot enters, and goes out from 11 slots；(3) main line enters from 3 slots, returns from 4 slots, enters from 6 slots, returns from 7 slots, enters from 9 slots, from 10 slots
It returns, enters from 11 slots, go out from 12 slots；(4) subordinate line enters from 1, returns from 3 slots, enters from 4 slots, returns from 6 slots, enters from 7 slots, from 9
Slot returns, and enters from 10 slots, goes out from 12 slots；(5) subordinate line enters from 2, returns from 4 slots, enters from 5 slots, returns from 7 slots, enters from 8 slots,
It is returned from 10 slots, enters from 11 slots, go out from 1 slot；(6) subordinate line from 3 enter, from 5 slots return, from 6 slots enter, from 8 slots return, from 9 slots into
Enter, returned from 11 slots, enters from 12 slots, go out from 2 slots.
Main 1 slot end of incoming cables is U phase, and 10 slot leading-out terminals are V phase, and main 2 slot ends of incoming cables are V phase, and 11 slot leading-out terminals are W phase, master 3
Slot end of incoming cables is W phase, and 12 slot leading-out terminals are U phase.Auxiliary 1 slot end of incoming cables is U phase, and 11 slot leading-out terminals are V phase, and auxiliary 2 slot end of incoming cables is V
Phase, 12 slot leading-out terminals are W phase, and auxiliary 3 slot end of incoming cables is W phase, and 1 slot leading-out terminal is U phase.
Main 1 slot is connected in parallel with auxiliary 1 slot end of incoming cables, and main 10 slot leading-out terminals are connected in parallel with auxiliary 11 slot leading-out terminal；Main 2 slots with
Auxiliary 2 slot end of incoming cables is connected in parallel, and main 11 slot leading-out terminals are connected in parallel with auxiliary 12 slot leading-out terminal；Main 3 slots are in parallel with auxiliary 3 slot end of incoming cables
Connection, main 12 slot leading-out terminals are connected in parallel with auxiliary 1 slot leading-out terminal.
As shown in fig. 6, when only one group of main coil acts on, torque fluctuation amplitude 0.2N increases by one group of auxiliary winding, two groups of lines
When enclosing collective effect, as shown in fig. 7, torque fluctuation amplitude is reduced to 0.1N, illustrate increased this group of coil, motor rotate when
It waits, the component of a small power can be generated, this component reduces or weaken the intrinsic torque ripple of main coil, reduces fluctuation
Big small magnitude, reduce motor noise and vibration, make motor even running.
Design principle of the present invention：
1. Sine distribution magnetic field generates sine wave electromotive force in the conductor；
2. guaranteeing that the induced electromotive force of three-phase windings is symmetrical with the distribution of slot potential triangle figure；
3. main coil is driving coil, the active force of motor rotation is generated, auxiliary winding generates point with inclined 15 degree of active force
Power can be used to offset the cogging torque determined by rotor structure and stator tooth slot structure, to reduce the vibration of motor and make an uproar
Sound.As shown in figure 4, F is the magnetic force that main coil acts on magnetic shoe N, it is suction the sum of of the repulsion with main coil 2 of main coil 1,
As shown in figure 5, F ' is the magnetic force that auxiliary winding acts on magnetic shoe N, inclined 15 degree with F, F ', which can be balanced, offsets part cogging torque.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (9)
1. a kind of brushless DC motor stator method for winding, including end of incoming cables and leading-out terminal, end of incoming cables shape in parallel two-by-two
At three-phase, U phase is held, V phase is held and W phase is held, and the leading-out terminal uses delta connection, it is characterised in that：The stator winding packet
Two groups of coils, the main coil of one group of offer power, the auxiliary winding of one group of offer component, major-minor parallel connection of coil are provided, and all adopted
Use delta connection.
2. a kind of brushless DC motor stator method for winding as described in claim 1, it is characterised in that：The U phase is held, V phase is held,
And W phase hold the U for respectively including main coil V W and the U of auxiliary winding V W phase hold, the U phase of the U phase of main coil and auxiliary winding is simultaneously
Connection, the V phase of main coil and the V of auxiliary winding are in parallel, and the W phase and auxiliary winding of main coil are in parallel.
3. a kind of brushless DC motor stator method for winding as described in claim 1, it is characterised in that：The main coil is multiturn
Coil, every group of the number of turns are determined that the auxiliary winding is single-turn circular coil, every phase of major-minor coil by stator slot width and copper wire specification
Winding such as is at the number of turns winding.
4. a kind of brushless DC motor stator method for winding as described in claim 1, it is characterised in that：The major-minor coil uses
Same size copper wire, the auxiliary winding are around between two main coils, the component and the main line of the reduction cogging torque provided
Inclined 15 degree of active force of circle offer.
5. a kind of brushless DC motor stator method for winding as described in claim 1, it is characterised in that：Stator is equipped with 12 lines
Slot, wherein 12 slots include 1 slot, 2 slots, 3 slots, 4 slots, 5 slots, 6 slots, 7 slots, 8 slots, 9 slots, 10 slots, 11 slots, 12 slots, wherein main line
Enclose 6,3 tunnel the end of a thread, 6,3 tunnel of auxiliary winding the end of a thread.
6. a kind of brushless DC motor stator method for winding as claimed in claim 5, it is characterised in that：The delta connection
Specific step is as follows for mode of connection：
(1) main line enters from 1 slot, returns from 2 slots, enters from 4 slots, returns from 5 slots, enters from 7 slots, returns from 8 slots, enters from 9 slots, from
10 slots go out；
(2) main line enters from 2 slots, returns from 3 slots, enters from 5 slots, returns from 6 slots, enters from 8 slots, returns from 9 slots, enters from 10 slots,
Go out from 11 slots；
(3) main line enters from 3 slots, returns from 4 slots, enters from 6 slots, returns from 7 slots, enters from 9 slots, returns from 10 slots, enters from 11 slots,
Go out from 12 slots；
(4) subordinate line enters from 1, returns from 3 slots, enters from 4 slots, returns from 6 slots, enters from 7 slots, returns from 9 slots, enters from 10 slots, from
12 slots go out；
(5) subordinate line enters from 2, returns from 4 slots, enters from 5 slots, returns from 7 slots, enters from 8 slots, returns from 10 slots, enters from 11 slots, from
1 slot goes out；
(6) subordinate line enters from 3, returns from 5 slots, enters from 6 slots, returns from 8 slots, enters from 9 slots, returns from 11 slots, enters from 12 slots, from
2 slots go out.
7. a kind of brushless DC motor stator method for winding as claimed in claim 6, it is characterised in that：Main 1 slot end of incoming cables is U
Phase, 10 slot leading-out terminals are V phase, and main 2 slot ends of incoming cables are V phase, and 11 slot leading-out terminals are W phase, and main 3 slot ends of incoming cables are W phase, 12 slot outlets
End is U phase.
8. a kind of brushless DC motor stator method for winding as claimed in claim 6, it is characterised in that：Auxiliary 1 slot end of incoming cables is U
Phase, 11 slot leading-out terminals are V phase, and auxiliary 2 slot end of incoming cables is V phase, and 12 slot leading-out terminals are W phase, and auxiliary 3 slot end of incoming cables is W phase, 1 slot outlet
End is U phase.
9. a kind of brushless DC motor stator method for winding as claimed in claim 6, it is characterised in that：Main 1 slot and auxiliary 1 slot inlet wire
End is connected in parallel, and main 10 slot leading-out terminals are connected in parallel with auxiliary 11 slot leading-out terminal；Main 2 slots are connected in parallel with auxiliary 2 slot end of incoming cables, and main 11
Slot leading-out terminal is connected in parallel with auxiliary 12 slot leading-out terminal；Main 3 slots are connected in parallel with auxiliary 3 slot end of incoming cables, main 12 slot leading-out terminals and auxiliary 1 slot
Leading-out terminal is connected in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982206.7A CN108880050B (en) | 2018-08-27 | 2018-08-27 | Brushless direct current motor stator winding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810982206.7A CN108880050B (en) | 2018-08-27 | 2018-08-27 | Brushless direct current motor stator winding method |
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| CN108880050A true CN108880050A (en) | 2018-11-23 |
| CN108880050B CN108880050B (en) | 2020-04-24 |
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| CN201810982206.7A Active CN108880050B (en) | 2018-08-27 | 2018-08-27 | Brushless direct current motor stator winding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165849A (en) * | 2019-06-17 | 2019-08-23 | 杨璐 | A kind of novel electric machine winding method |
| CN111641301A (en) * | 2020-05-19 | 2020-09-08 | 台州市金宇机电有限公司 | Winding method of motor stator for electric vehicle |
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| US4307311A (en) * | 1979-05-25 | 1981-12-22 | Robert Bosch Gmbh | Winding method for an electrical generator and generator manufactured by the method |
| EP0350727A2 (en) * | 1988-07-15 | 1990-01-17 | Licentia Patent-Verwaltungs-GmbH | Two-wire winding of a synchronous three-phase linear motor |
| JPH0984310A (en) * | 1995-09-19 | 1997-03-28 | Oriental Motor Co Ltd | Winding method for polyphase motor and the polyphase motor wound by the same method |
| CN103368303A (en) * | 2013-06-22 | 2013-10-23 | 佛山市顺德区泛仕达机电有限公司 | Low-noise alternating current motor and winding method thereof |
| CN102545442B (en) * | 2010-12-29 | 2016-05-18 | 罗伯特·博世有限公司 | For the armature of motor, the manufacture method of this armature and motor |
| CN206341057U (en) * | 2016-12-29 | 2017-07-18 | 广东威灵电机制造有限公司 | The stator of wall-breaking machine motor and the wall-breaking machine motor with it |
| CN207475296U (en) * | 2017-12-07 | 2018-06-08 | 苏州瑞诺盟新能源电机有限公司 | A kind of 12 slot centralization winding brushless direct current permanent magnet motor of 8 pole |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4307311A (en) * | 1979-05-25 | 1981-12-22 | Robert Bosch Gmbh | Winding method for an electrical generator and generator manufactured by the method |
| EP0350727A2 (en) * | 1988-07-15 | 1990-01-17 | Licentia Patent-Verwaltungs-GmbH | Two-wire winding of a synchronous three-phase linear motor |
| JPH0984310A (en) * | 1995-09-19 | 1997-03-28 | Oriental Motor Co Ltd | Winding method for polyphase motor and the polyphase motor wound by the same method |
| CN102545442B (en) * | 2010-12-29 | 2016-05-18 | 罗伯特·博世有限公司 | For the armature of motor, the manufacture method of this armature and motor |
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| CN206341057U (en) * | 2016-12-29 | 2017-07-18 | 广东威灵电机制造有限公司 | The stator of wall-breaking machine motor and the wall-breaking machine motor with it |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165849A (en) * | 2019-06-17 | 2019-08-23 | 杨璐 | A kind of novel electric machine winding method |
| CN111641301A (en) * | 2020-05-19 | 2020-09-08 | 台州市金宇机电有限公司 | Winding method of motor stator for electric vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108880050B (en) | 2020-04-24 |
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