CN203691091U - Rotor sheet of internal rotor permanent magnetic motor - Google Patents
Rotor sheet of internal rotor permanent magnetic motor Download PDFInfo
- Publication number
- CN203691091U CN203691091U CN201320827281.9U CN201320827281U CN203691091U CN 203691091 U CN203691091 U CN 203691091U CN 201320827281 U CN201320827281 U CN 201320827281U CN 203691091 U CN203691091 U CN 203691091U
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- lamellar body
- rotor
- circle
- magnetic
- dovetail groove
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Abstract
The utility model belongs to the field of motor manufacture and overcomes the technical problems of the rotor sheet of a conventional internal rotor permanent magnetic motor. The utility model provides an improved rotor sheet of an internal rotor permanent magnetic motor. The rotor sheet comprises an annular sheet body, and a shaft hole is formed in the center of the annular sheet body. The rotor sheet is characterized in that dovetail grooves in identical member with the motor pole are uniformly arranged in the outer rim of the sheet body, the bottom edges of the dovetail grooves are positioned on the external rim of the sheet body, a magnetic steel insertion hole is arranged in the sheet body between each two dovetail grooves, and the magnetic steel insertion holes are close to the edge of the sheet body. Compared with a conventional rotor sheet, the rotor sheet is better in magnetic leakage prevention effect and improves motor performance.
Description
Technical field
The invention belongs to field of motor manufacturing, relate to a kind of rotor punching of internal rotor permanent-magnetic motor.
Background technology
The rotor punching structure of internal rotor permanent-magnetic motor as shown in Figure 1 at present, shown in accompanying drawing 1 is a kind of rotor punching 1 of 4 utmost point internal rotor permanent-magnetic motors, it comprises a circular punching body, is evenly being provided with the magnet steel patchhole 2 corresponding with motor pole number near on the punching body of cylindrical.By reference to the accompanying drawings shown in 2, the width of magnet steel patchhole 2 is greater than the width of magnet steel 3, the magnet steel patchhole space of magnet steel 3 both sides forms magnetic trapping gap 4, and the space between rotor punching 1 and stator punching 5 forms air gap 6, and the punching body between magnet steel patchhole two ends and rotor punching forms every magnetic magnetic bridge 7.This kind of rotor punching mainly utilizes the low magnetic permeability of air, when manufacture, and the size every magnetic air gap 4 dimensional requirements much larger than motor gas-gap 6.And be to utilize the saturated rear magnetic resistance increase of this part magnetic circuit to carry out every magnetic every magnetic magnetic bridge 7, be subject to limit every magnetic magnetic bridge width every magnetic effect, every magnetic magnetic bridge 7 width, more septulum magnetic effect is better, as shown in accompanying drawing 1 and accompanying drawing 2, the two ends of magnet steel patchhole 2 are designed to along rotor punching cylindrical trend, and object is exactly to make to diminish every the width of magnetic magnetic bridge 7.But the less difficulty of processing of width is larger, rotor mechanical intensity also decreases, and can not do very narrowly from manufacturability and mechanical strength angle every magnetic magnetic bridge, therefore still can have leakage field every magnetic magnetic bridge position.Conventionally air gap 6 forms after by rotor outer circle machine work, and machining can reduce lamination insulation ability, can make the eddy current loss being caused at rotor surface by stator winding harmonic field increase to some extent.
Summary of the invention
For overcoming the existing above-mentioned technical problem of rotor punching of internal rotor permanent-magnetic motor of current use, the utility model provides a kind of rotor punching of improved internal rotor permanent-magnetic motor.
The technical solution adopted in the utility model is: a kind of rotor punching of internal rotor permanent-magnetic motor, comprise a ring-type lamellar body, the interstitial hole of ring-type lamellar body forms axis hole, it is characterized in that: in described lamellar body outer rim, evenly have the dovetail groove corresponding with motor pole number, dovetail groove base is positioned at lamellar body outer rim, on lamellar body between dovetail groove, be provided with magnet steel patchhole between two, magnet steel patchhole is near lamellar body edge.
The two ends of described dovetail groove trough rim are respectively equipped with rounded corner.
Described magnet steel patchhole is ridge-roof type, and its top angle is 100-135 °.
Described each lamellar body outer margin contour line between dovetail groove is between two positioned on same round mark, and the circle at this circle mark place is concentric with the axis hole of ring-type lamellar body.
Described each lamellar body outer margin contour line between dovetail groove is between two positioned on different round marks, and each round mark place diameter of a circle is consistent, and with the axis hole bias of ring load body, the center of circle that justify at each round mark place be positioned on same round trace and this circle concentric with described axis hole.
The rotor outline that adopts this rotor punching to fold to form is made up of curved section, and motor gas-gap directly adopts rotor punching punch die stamping-out out, can not destroy and rush lamination insulation, is conducive to reduce rotor surface eddy current loss.Between magnet steel, need in punching, not leave every magnetic air gap, the trapezoidal groove on rotor punching plays separated magnetic effect, does not need to arrange every magnetic magnetic bridge structure.The rotor punching of this internal rotor permanent-magnetic motor preventing there is remarkable lifting in leakage field effect, has obvious facilitation to the further lifting of motor performance with respect to conventional rotors punching.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of prior art rotor punching.
Accompanying drawing 3 is the structural representation of the utility model the first embodiment rotor punching.
Accompanying drawing 4 folds the structural representation after the rotor forming is combined with stator for accompanying drawing 3 rotor punchings.
Accompanying drawing 5 is the structural representation of the utility model the second embodiment rotor punching.
Accompanying drawing 6 folds the structural representation after the rotor forming is combined with stator for accompanying drawing 5 rotor punchings.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
As shown in Figure 3, a kind of rotor punching of 4 utmost point internal rotor permanent-magnetic motors, rotor punching 1 is a ring-type lamellar body, the interstitial hole of ring-type lamellar body forms axis hole 9, in lamellar body outer rim, evenly have 4 dovetail grooves 8, dovetail groove base is positioned at lamellar body outer rim, is being provided with magnet steel patchhole 2 between two on the lamellar body between dovetail groove, and magnet steel patchhole 2 is near lamellar body edge.
As shown in Figure 3, in this embodiment, each lamellar body outer margin contour line between dovetail groove is between two positioned on same round mark 11, and the circle at this circle mark place is concentric with the axis hole center of circle 12 of ring-type lamellar body.
Known by foregoing description, this rotor punching directly adopts circular lamellar body evenly to go out 4 dovetail grooves at its edge during fabrication, and its processing is very easy.When this circular rotor punching is folded into after rotor, as shown in Figure 4, the dovetail groove 8 on rotor punching 1 forms magnetic trapping gap to the bonding state of itself and stator, and the space between rotor punching 1 and stator punching 5 forms air gap 6.Compared with prior art in accompanying drawing 2, size every magnetic air gap is further amplified with respect to the size of motor gas-gap 6, and its effect that prevents interelectrode magnetic leakage is more outstanding, has omitted every magnetic magnetic bridge 7 simultaneously, reduced difficulty of processing, rotor mechanical intensity is obviously promoted.
As shown in Figure 3, for guaranteeing the level and smooth of dovetail groove 8 notches, the two ends of dovetail groove trough rim are respectively equipped with rounded corner 13.
As shown in Figure 4, each magnetic pole has two blocks of same polarity magnet steel 3 to be combined into, and for ease of the manufacture of magnet steel pressing mold, monolithic magnet steel cross section is at right angles trapezoidal, after two same polarity magnet steel docking, forms ridge shape.As shown in Figure 3, magnet steel patchhole 2 correspondences on rotor punching 1 are set to ridge, and its top angle general control is convenient to the insertion of two blocks of magnet steel between 100-135 °.If magnet steel 3 is other cross sectional shapes certainly, the magnet steel patchhole correspondence on rotor punching is set to the cross sectional shape identical with magnet steel.In the present embodiment, magnet steel patchhole 2 is set to ridge, and the one, coordinate magnet steel cross sectional shape, facilitate the compacting of magnet steel; The 2nd, can effectively improve the mechanical strength of rotor.
In the present embodiment, be as an example of 4 utmost point motors example, rotor punching and use thereof to be described, in the time that motor is other number of poles, dovetail groove quantity on rotor punching changes thereupon, and its quantity is consistent with motor pole number, and this rotor punching is not subject to the restriction of stator slot shape structure, number of stator slots simultaneously.
Its rotor that folds rear formation of the rotor punching of the internal rotor permanent-magnetic motor providing in embodiment 1 is significantly increased with respect to rotor punching performance of the prior art aspect interelectrode magnetic leakage preventing, but because it adopts the direct stamping-out of circular lamellar body, each lamellar body outer margin contour line between dovetail groove is between two positioned on same round mark, cause motor gas-gap consistency of thickness, the air gap 6 shown in the visible accompanying drawing 5 of this structure.In practical application test, find, gap structure is unfavorable for slackening cogging torque uniformly, can make the eddy current loss being caused at rotor surface by stator winding harmonic field increase simultaneously, and the overall performance of motor is caused to larger impact.
For addressing this problem, on the rotor punching basis that the present embodiment provides at embodiment 1, carry out further and improve.
In the present embodiment, be described as an example of rotor sheet of four-pole motor example equally.
As shown in Figure 5, the rotor punching 1 that the present embodiment provides is also a ring-type lamellar body, the interstitial hole of ring-type lamellar body forms axis hole 9, in lamellar body outer rim, evenly have 4 dovetail grooves 8, dovetail groove base is positioned at lamellar body outer rim, on lamellar body between dovetail groove, be provided with magnet steel patchhole 2 between two, magnet steel patchhole 2 is near lamellar body edge.
As shown in Figure 5, take the round mark 11 at the wherein lamellar body outer margin contour line place between two dovetail grooves on rotor punching 1 as example, lamellar body outer margin contour line between other 3 two dovetail grooves does not overlap with this circle mark 11, the center of circle 14 of the circle at these circle mark 11 places and the axis hole center of circle 12 bias of ring-type lamellar body.As can be seen here, the each lamellar body outer margin contour line between dovetail groove between two of this rotor punching is to be positioned on different round marks.Consistent for guaranteeing the lamellar body outer margin contour line at each magnet steel patchhole place on rotor punching, as shown in Figure 5, aforesaid different circle marks place diameter of a circle is consistent, the center of circle of each round mark place circle be positioned on same round trace 15 and this circle concentric (for clarity with the described axis hole center of circle 12, there is shown the round mark 11 of one of them lamellar body outer margin contour line place circle and the round mark 15 of this round heart place circle, omit the round mark of other lamellar body outer margin contour line place circles.
As shown in Figure 6, adopt after this rotor punching, changing appears in air gap 6 width between rotor punching 1 and stator punching 5, and the width of air gap 6 is strengthened gradually and extends to dovetail groove to both sides by rotor punching outer rim polar arc place.The inconsistency of these air gap 6 width can effectively slacken cogging torque, can make the eddy current loss being caused at rotor surface by stator winding harmonic field effectively reduce simultaneously, has further promoted the overall performance of motor.
Claims (5)
1. the rotor punching of an internal rotor permanent-magnetic motor, comprise a ring-type lamellar body, the interstitial hole of ring-type lamellar body forms axis hole, it is characterized in that: in described lamellar body outer rim, evenly have the dovetail groove corresponding with motor pole number, dovetail groove base is positioned at lamellar body outer rim, on lamellar body between dovetail groove, be provided with magnet steel patchhole between two, magnet steel patchhole is near lamellar body edge.
2. the rotor punching of a kind of internal rotor permanent-magnetic motor according to claim 1, is characterized in that: the two ends of described dovetail groove trough rim are respectively equipped with rounded corner.
3. the rotor punching of a kind of internal rotor permanent-magnetic motor according to claim 1, is characterized in that: described magnet steel patchhole is ridge-roof type, and its top angle is 100-135 °.
4. the rotor punching of a kind of internal rotor permanent-magnetic motor according to claim 1, is characterized in that: described each lamellar body outer margin contour line between dovetail groove is between two positioned on same round mark, and the circle at this circle mark place is concentric with the axis hole of ring-type lamellar body.
5. the rotor punching of a kind of internal rotor permanent-magnetic motor according to claim 1, it is characterized in that: described each lamellar body outer margin contour line between dovetail groove is between two positioned on different round marks, each round mark place diameter of a circle is consistent, and with the axis hole bias of ring load body, the center of circle of each round mark place circle be positioned on same round trace and this circle concentric with described axis hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320827281.9U CN203691091U (en) | 2013-12-17 | 2013-12-17 | Rotor sheet of internal rotor permanent magnetic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320827281.9U CN203691091U (en) | 2013-12-17 | 2013-12-17 | Rotor sheet of internal rotor permanent magnetic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203691091U true CN203691091U (en) | 2014-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320827281.9U Expired - Fee Related CN203691091U (en) | 2013-12-17 | 2013-12-17 | Rotor sheet of internal rotor permanent magnetic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203691091U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701237A (en) * | 2013-12-17 | 2014-04-02 | 山东华力电机集团股份有限公司 | Rotor punching sheet for inner rotor permanent magnet motor |
| CN111919360A (en) * | 2018-03-23 | 2020-11-10 | 爱信艾达株式会社 | Rotor for rotating electrical machine |
-
2013
- 2013-12-17 CN CN201320827281.9U patent/CN203691091U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701237A (en) * | 2013-12-17 | 2014-04-02 | 山东华力电机集团股份有限公司 | Rotor punching sheet for inner rotor permanent magnet motor |
| CN111919360A (en) * | 2018-03-23 | 2020-11-10 | 爱信艾达株式会社 | Rotor for rotating electrical machine |
| CN111919360B (en) * | 2018-03-23 | 2023-09-12 | 株式会社爱信 | Rotor for rotating electrical machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20151217 |
|
| EXPY | Termination of patent right or utility model |