CN105337436B - Permanent magnet synchronous motor and manufacturing method thereof and rotor punching sheet - Google Patents
Permanent magnet synchronous motor and manufacturing method thereof and rotor punching sheet Download PDFInfo
- Publication number
- CN105337436B CN105337436B CN201510926236.2A CN201510926236A CN105337436B CN 105337436 B CN105337436 B CN 105337436B CN 201510926236 A CN201510926236 A CN 201510926236A CN 105337436 B CN105337436 B CN 105337436B
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- rotor
- rotor punching
- punching
- keyway
- center
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- 238000004080 punching Methods 0.000 title claims abstract description 146
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 230000007704 transition Effects 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- 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
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a permanent magnet synchronous motor, a manufacturing method thereof and a rotor punching sheet. The rotor punching sheet is provided with a plurality of magnet installation parts, the circumferential spacing angles A of the centers of any two adjacent magnet installation parts are the same, the inner ring of the rotor punching sheet is provided with a plurality of key grooves, the circumferential spacing angles B of the centers of two adjacent key grooves are various, the spacing angles B are not equal to N A, and N is a natural number. By applying the technical scheme of the invention, the interval angles of the centers of any two adjacent magnet mounting parts in the circumferential direction of the rotor sheet are all constant values A, the inner ring of the rotor sheet is provided with a plurality of key slots, the interval angles B of the centers of two adjacent key slots in the circumferential direction of the rotor sheet are various, and the interval angles B are not equal to N x A, so that the key slots at different angles in the circumferential direction of the rotor sheet are aligned, the magnet mounting parts cannot be aligned, and the deflection of the magnet mounted in the magnet mounting parts is realized.
Description
Technical field
The present invention relates to motor fields, in particular to a kind of permasyn morot and preparation method thereof and rotor
Punching.
Background technology
The common method for weakening magneto torque ripple includes skewed stator slot and skewed-rotor.
The method that existing skewed-rotor method uses different punchings, i.e. using punching, there are many samples on a motor
Formula needs the punching of five kinds of specifications if rotor will be divided into five sections, needs five sets of diels, such method cost very high.
Another method is that the position of keyway is made to deviate certain angle with pole center line, is inverted and placed by positive and negative
The method of punching, highest can make the segments of rotor reach 3 sections, and such method cannot achieve the segmentation of more multistage, and easily cause not
Balance.
Invention content
The main purpose of the present invention is to provide a kind of permasyn morot that multi-section skewed pole may be implemented and its making
Method and rotor punching.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of rotor punching of magneto, turns
Multiple magnet mounting portions are formed in sub- punching, the center of two magnet mounting portions of arbitrary neighborhood is in the circumferential direction of rotor punching
Interval angles A is identical, is provided with multiple keyways on the inner ring of rotor punching, the week of the center of two neighboring keyway in rotor punching
Upward interval angles B is a variety of, and interval angles B ≠ N*A, N are natural number.
Further, interval angles B is sequentially increased along the circumferential direction of rotor punching.
Further, the value of the multiple interval angles B set gradually along the circumferential direction of rotor punching is in arithmetic progression.
Further, magnet mounting portion includes the through-hole being formed on rotor punching.
Further, magnet mounting portion includes two through-holes, and magnet mounting portion has radially extending along rotor punching
Center line, two through-holes are located at the both sides of center line, and two V-shaped arrangements of through-hole, the tip of " V " font, which is directed toward, to be turned
The center of sub- punching.
Further, magnet mounting portion is identical as the number of keyway, and magnet mounting portion is arranged correspondingly with keyway,
The center of multiple keyways is in same direction in the center for being circumferentially offset corresponding magnet mounting portion of rotor punching, keyway
The heart is being upwardly formed interval angles C the weeks of rotor punching with the center of corresponding magnet mounting portion, and interval angles C is along rotor punching
Circumferential direction be sequentially increased.
Further, the value of the multiple interval angles C set gradually along the circumferential direction of rotor punching is in arithmetic progression.
Further, it is provided with barycenter balance portion on rotor punching, the matter of rotor will be assembled by multiple rotor punchings
The heart is transferred to the center of rotor, wherein barycenter balance portion is the groove being opened on the inner ring of rotor punching, is opened in rotor punching
The lightening hole of on piece or the counterweight being connected on rotor punching.
According to another aspect of the present invention, a kind of permanent magnet synchronous motor, including rotor are provided, rotor includes that multiple edges turn
The rotor punching of the axially stacked setting of son, rotor punching are above-mentioned rotor punching.
It is characterized in that, rotor includes multiple punching sheet units, multiple punching sheet units are along the axial arranged of rotor, each punching
Unit includes multiple rotor punchings, belongs to whole keyways of the rotor punching of same punching sheet unit to just, two neighboring punching list
The rotor punching of member is circumferentially offset angle D along rotor, and at least one keyway of the rotor punching of whole punching sheet units is to just.
According to another aspect of the present invention, a kind of production method of above-mentioned permanent magnet synchronous motor, permanent-magnet synchronous are provided
The production method of motor includes stacked rotor punching, and stacked rotor punching includes：Rotor punching whole keyways to positive situation
Under, it is stacked multiple rotor punchings；It, will be with M, interval of benchmark keyway key using a keyway in whole keyways as benchmark keyway
The keyway and benchmark keyway of slot are to being just stacked multiple rotor punchings, wherein 0≤M.
It applies the technical scheme of the present invention, the center of two magnet mounting portions of arbitrary neighborhood is in the circumferential direction of rotor punching
Interval angles are definite value A, multiple keyways are provided on the inner ring of rotor punching, the center of two neighboring keyway is in rotor punching
Circumferential direction on interval angles B be a variety of, and interval angles B ≠ N*A, therefore by different angles in the circumferential direction of rotor punching
Keyway to timing, magnet mounting portion will not be to just, namely realizes the deflection of the magnet in magnet mounting portion.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the embodiment of the rotor punching of magneto according to the present invention.
Reference numeral：
1, magnet mounting portion；2, keyway；3, groove.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In conjunction with shown in Fig. 1, multiple magnet mounting portions 1 are formed on the rotor punching of the magneto of the present embodiment, arbitrarily
Interval angles A of the center of two neighboring magnet mounting portion 1 in the circumferential direction of rotor punching is identical, is set on the inner ring of rotor punching
It is equipped with multiple keyways 2, the interval angles B of the center of two neighboring keyway 2 in the circumferential direction of rotor punching is a variety of, and angular interval
B ≠ N*A is spent, N is natural number.
Because of interval angles B ≠ N*A, thus by by the keyway of angle different in the circumferential direction of two rotor punchings to just
When, magnet mounting portion will not be to just, namely realizes the deflection of the magnetic pole in magnet mounting portion.And interval angles B is
It is a variety of, therefore when rotor punching is laminated into rotor, by keyway 2 different in the circumferential direction of rotor punching to after just, may be implemented
More than the 1 kinds of deflection of magnet mounting portion.
The rotor for having used magnetic pole to deflect, the commonly referred to as oblique pole permanent magnet motor of rotor segment, such motor have and can cut
When weak cogging torque, smooth induced potential waveform, decrease load running the effects that torque ripple, correspondingly also reduces and use this
Generated vibrations and noise, can meet the needs of certain specific occasions when kind of motor, expand magneto its use scope.
In the motor for implementing magnetic pole deflection, the harmonic content in output torque can be reduced so that output torque is more
Add smooth-going, while vibrations and noise can be reduced, extends the service life of the other drive apparatus connect with associated electric motor.
Include in the method that the rotor punching using the present embodiment laminates into rotor：First, in whole keys of rotor punching
Slot 2 is in the case of just, being stacked multiple rotor punchings；Then, using a keyway 2 in above-mentioned whole keyways 2 as benchmark keyway,
By with the keyway 2 of M, interval of benchmark keyway keyway 2 and benchmark keyway to being just stacked multiple rotor punchings, wherein 0≤M.
Optionally, interval angles B is sequentially increased along the circumferential direction of rotor punching.By the multiple keys set gradually in circumferential direction
Slot 2 is successively with benchmark keyway 2 to after just, the magnet mounting portion 1 on rotor punching generates a variety of deflection angles.
It is possible to further be the value of the multiple interval angles B set gradually along the circumferential direction of rotor punching be in arithmetic progression.
The magnet mounting portion 1 of the present embodiment includes the through-hole being formed on rotor punching, and magnet is installed in through-holes.
In the present embodiment, magnet mounting portion 1 includes two through-holes, and there is magnet mounting portion 1 radial direction along rotor punching to prolong
The center line stretched, two through-holes are located at the both sides of center line, and two V-shaped arrangements of through-hole, the tip of " V " font refers to
To the center of rotor punching 1.
Certainly, magnet mounting portion 1 or the multiple through-holes arranged in " U " font or " W " font, to install multiple magnetic
Body.
As shown in Figure 1, multiple magnet mounting portions 1 are arranged correspondingly with multiple keyways 2, the center edge of multiple keyways 2
Identical direction is in the center for being circumferentially offset corresponding magnet mounting portion 1 of rotor punching, the center of keyway 2 and corresponding magnet
The center of mounting portion 1 increases along the circumferential direction of rotor punching successively being upwardly formed interval angles C, interval angles C the week of rotor punching
Greatly.
In the present embodiment, the value of the multiple interval angles C set gradually along the circumferential direction of rotor punching is in arithmetic progression.
It is provided with barycenter balance portion on rotor punching, the centroid transition that rotor is assembled by multiple rotor punchings is extremely turned
Son center, barycenter balance portion be the groove 3 being opened on the inner ring of rotor punching, the lightening hole being opened on rotor punching or
The counterweight being connected on rotor punching.
Due to multiple keyways on the rotor punching of the present embodiment along rotor punching circumferential asymmetry be arranged, by upper
The center of gravity of rotor and the axis direction of rotor that the rotor punching stated is constituted deviate, therefore are provided with barycenter on the rotor punching
Balance portion.The form in barycenter balance portion can be calculated according to the specific arrangement mode for the rotor punching for constituting rotor.
According to the another aspect of the present embodiment, the present embodiment also discloses a kind of permanent magnet synchronous motor, the permanent magnet synchronous electric
Machine includes rotor, and rotor includes the rotor punching of multiple axially stacked settings along rotor, and rotor punching is above-mentioned rotor punching.
The rotor of the permanent magnet synchronous motor of the present embodiment is formed by multiple rotor punchings are stacked, and multiple rotor punchings are divided into more
A punching sheet unit, multiple punching sheet units include multiple rotor punchings along the axial arranged of rotor, each punching sheet unit, belong to same
Whole keyways 2 of the rotor punching of punching sheet unit are to just, rotor punching being circumferentially offset along rotor of two neighboring punching sheet unit
Angle D, at least one keyway 2 of the rotor punching of whole punching sheet units is to just.
In the present embodiment：
By taking rotor punching shown in FIG. 1 as an example：As can be seen from Figure, between on the inner ring direction of rotor punching not wait
Away from being provided with multiple keyways 2.Multiple keyways are provided with 8 magnet mounting portions 1 respectively marked as S1 to S8 on rotor punching, respectively
Marked as P1 to P8.
Multiple rotor punchings of rotor are divided into 7 sections, oblique polar angle degree is 7.5 degree (360 °/48) altogether, if angle [alpha]=
7.5 °/7=1.0714 °.The center of the number key groove center positions S1 and P1 magnet mounting portions is to just, S2 number key groove centers
The advanced P2 magnetic poles α degree of line need, the advanced 2 α degree of P3 pole centers line of S3 number key groove center lines, and so on, in S7 number key slots
The advanced 6 α degree of P7 pole centers line of heart line.No. S1 size and shape to S7 number key slots is identical, S8 number keys
Slot is balance keyway, is arranged between S1 number keys slot and S7 number key slots, size and shape can be different from preceding S7 number keys slot, mesh
Be to be used to balance, size and position are all in accordance with needing to set.
When rotor punching is laminated into rotor, 7 units are divided on axial length, each unit individually laminates solid
It is fixed, and it is filled with magnet steel, need to ensure that the magnet steel axial overall length in each unit is equal to the axial length of the unit herein.By 7
Individually processing carries out general assembly to unit after the completion.On the basis of the S1 number key slots of Unit the 1st, by the S2 number key slots of Unit the 2nd, the 3rd
The S3 number key slots of unit, the S4 number key slots of Unit the 4th, the S5 number key slots of Unit the 5th, the S6 number key slots of Unit the 6th, Unit the 7th
S7 number key slots etc. totally 7 keyways complete assembly to just, being coordinated by flat key with the keyway on rotor shaft.Processing turns
Routinely permanent magnet machine rotor processing method is processed the required other process means of son.
It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of rotor punching of magneto, which is characterized in that be formed with multiple magnet mounting portions on the rotor punching
(1), interval angles A of the center of the magnet mounting portion (1) of arbitrary neighborhood two in the circumferential direction of the rotor punching is identical,
Multiple keyways (2) are provided on the inner ring of the rotor punching, the center of the two neighboring keyway (2) is in the rotor punching
Circumferential direction on interval angles B be a variety of, and the interval angles B ≠ N*A, N are natural number, the magnet mounting portion (1) with
The number of the keyway (2) is identical, and the magnet mounting portion (1) is arranged correspondingly with the keyway (2), multiple described
The center of keyway (2) being circumferentially offset in the corresponding magnet mounting portion (1) in the rotor punching in same direction
The heart, the center of the keyway (2) are upwardly formed with the center of the corresponding magnet mounting portion (1) in the week of the rotor punching
Interval angles C, the interval angles C are sequentially increased along the circumferential direction of the rotor punching, and along the side that the interval angles C reduces
To the adjacent keyway (2) of the keyway (2) corresponding with the minimum interval angles C is described flat as balance keyway
The angular interval that the center of weighing apparatus keyway is upwardly formed with the center of the corresponding magnet mounting portion (1) in the week of the rotor punching
Degree is determined according to actual conditions.
2. rotor punching according to claim 1, which is characterized in that weeks of the interval angles B along the rotor punching
To being sequentially increased.
3. rotor punching according to claim 1, which is characterized in that set gradually along the circumferential direction of the rotor punching more
The value of a interval angles B is in arithmetic progression.
4. rotor punching according to claim 1, which is characterized in that the magnet mounting portion (1) is described including being formed in
Through-hole on rotor punching.
5. rotor punching according to claim 4, which is characterized in that the magnet mounting portion (1) includes two described logical
There is the center line radially extended along the rotor punching, two through-holes to be located at for hole, the magnet mounting portion (1)
It is directed toward the rotor punching in the tip of the both sides of the center line, described two V-shaped arrangements of through-hole, " V " font
(1) center.
6. rotor punching according to claim 1, which is characterized in that set gradually along the circumferential direction of the rotor punching more
The value of a interval angles C is in arithmetic progression.
7. rotor punching according to any one of claim 1 to 6, which is characterized in that be provided on the rotor punching
Barycenter balance portion will be assembled into the centroid transition of rotor to the center of the rotor, wherein institute by multiple rotor punchings
State barycenter balance portion be the groove being opened on the inner ring of the rotor punching, the lightening hole that is opened on the rotor punching or
The counterweight being connected on the rotor punching.
8. a kind of permanent magnet synchronous motor, including rotor, which is characterized in that the rotor includes multiple axial layers along the rotor
The rotor punching of folded setting, the rotor punching are any one of claim 1 to 6 rotor punching.
9. permanent magnet synchronous motor according to claim 8, which is characterized in that the rotor includes multiple punching sheet units, more
For a punching sheet unit along the axial arranged of the rotor, each punching sheet unit includes multiple rotor punchings, belongs to same
The whole keyway (2) of the rotor punching of the punching sheet unit is to just, the rotor of two neighboring punching sheet unit rushes
Piece is circumferentially offset angle D along the rotor, all at least one keyway of the rotor punching of the punching sheet unit
(2) to just.
10. the production method of the permanent magnet synchronous motor described in a kind of claim 8 or 9, which is characterized in that described turn including stacked
Sub- punching, the stacked rotor punching include：
In the case that the rotor punching the whole keyway (2) to just, be stacked multiple rotor punchings；
It, will be with benchmark keyway interval using a keyway (2) in the whole keyway (2) as benchmark keyway
The keyway (2) and the benchmark keyway of a keyways (2) of M are to being just stacked multiple rotor punchings, wherein 0≤M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510926236.2A CN105337436B (en) | 2015-12-14 | 2015-12-14 | Permanent magnet synchronous motor and manufacturing method thereof and rotor punching sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510926236.2A CN105337436B (en) | 2015-12-14 | 2015-12-14 | Permanent magnet synchronous motor and manufacturing method thereof and rotor punching sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105337436A CN105337436A (en) | 2016-02-17 |
| CN105337436B true CN105337436B (en) | 2018-09-18 |
Family
ID=55287798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510926236.2A Active CN105337436B (en) | 2015-12-14 | 2015-12-14 | Permanent magnet synchronous motor and manufacturing method thereof and rotor punching sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105337436B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936236B (en) * | 2016-12-04 | 2017-11-10 | 浙江达可尔汽车电子科技有限公司 | Automobile using permanent-magnetic synchronous motor rotor |
| CN106533104A (en) * | 2016-12-28 | 2017-03-22 | 卧龙电气集团股份有限公司 | Straight and oblique pole integrated rotor punching plate of permanent magnet synchronous motor and permanent magnet synchronous motor |
| CN109038889A (en) * | 2018-07-13 | 2018-12-18 | 珠海格力电器股份有限公司 | Motor rotor and motor |
| DE102018219244A1 (en) * | 2018-11-12 | 2020-05-14 | Mahle Lnternational Gmbh | Rotor unit for an electrical machine |
| CN110535269A (en) * | 2019-10-10 | 2019-12-03 | 安徽安凯汽车股份有限公司 | A kind of permanent-magnetic synchronous motor rotor step skewed pole structure |
| CA3180910A1 (en) * | 2020-05-08 | 2021-11-11 | David M. TANNER | Systems and methods for constructing efficient permanent magnet motors |
| US11223262B1 (en) * | 2020-10-20 | 2022-01-11 | Tempel Steel Company | Rotating punch with a relief feature for forming IPM motor rotor |
| CN114362399B (en) * | 2020-11-18 | 2024-03-01 | 华为数字能源技术有限公司 | Motor rotor, motor, power assembly and electric vehicle |
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|---|---|---|---|---|
| CN201355777Y (en) * | 2008-12-30 | 2009-12-02 | 上海大郡自动化系统工程有限公司 | Skewed slot rotor for motor |
| CN202068291U (en) * | 2010-12-30 | 2011-12-07 | 上海大郡动力控制技术有限公司 | Skewed pole rotor used for synchronous motor |
| CN203850942U (en) * | 2014-05-28 | 2014-09-24 | 华域汽车电动系统有限公司 | Four-segmented inclined-pole permanent magnet motor rotor formed by single punching sheets |
| CN104617696A (en) * | 2015-02-11 | 2015-05-13 | 苏州和鑫电气股份有限公司 | Permanent magnet motor double-key-groove rotor punching sheet capable of being used at multiple angles |
| CN205429910U (en) * | 2015-12-14 | 2016-08-03 | 北京新能源汽车股份有限公司 | Permanent magnet synchronous motor and rotor punching sheet thereof |
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2015
- 2015-12-14 CN CN201510926236.2A patent/CN105337436B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201355777Y (en) * | 2008-12-30 | 2009-12-02 | 上海大郡自动化系统工程有限公司 | Skewed slot rotor for motor |
| CN202068291U (en) * | 2010-12-30 | 2011-12-07 | 上海大郡动力控制技术有限公司 | Skewed pole rotor used for synchronous motor |
| CN203850942U (en) * | 2014-05-28 | 2014-09-24 | 华域汽车电动系统有限公司 | Four-segmented inclined-pole permanent magnet motor rotor formed by single punching sheets |
| CN104617696A (en) * | 2015-02-11 | 2015-05-13 | 苏州和鑫电气股份有限公司 | Permanent magnet motor double-key-groove rotor punching sheet capable of being used at multiple angles |
| CN205429910U (en) * | 2015-12-14 | 2016-08-03 | 北京新能源汽车股份有限公司 | Permanent magnet synchronous motor and rotor punching sheet thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105337436A (en) | 2016-02-17 |
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