CN208316442U - Rotor and magneto - Google Patents
Rotor and magneto Download PDFInfo
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- CN208316442U CN208316442U CN201820980648.3U CN201820980648U CN208316442U CN 208316442 U CN208316442 U CN 208316442U CN 201820980648 U CN201820980648 U CN 201820980648U CN 208316442 U CN208316442 U CN 208316442U
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Abstract
It includes rotor core that the utility model, which provides a kind of rotor and magneto, the rotor, and the rotor core includes multiple circumferentially distributed magnetic poles；Each magnetic pole includes air groove, the first magnetic slot for installing the first magnet steel and two the second magnetic slots for being respectively used to install the second magnet steel, first magnetic slot is symmetrical about the d-axis of the magnetic pole, described two second magnetic slots are V-shaped symmetrical in the d-axis two sides of the magnetic pole, the air groove is between described two second magnetic slots, and the air groove is symmetrical about the d-axis of the magnetic pole；The two side walls of magnetic bridge between the lower end and the air groove of each second magnetic slot are respectively parallel to the d-axis of the magnetic pole.The utility model is wide by making the magnetic bridge between the second magnetic slot and air groove, and parallel with the d-axis of magnetic pole, can reduce the leakage field of the second magnet steel while promoting the intensity of magnetic bridge.
Description
Technical field
The utility model relates to motor fields, more specifically to a kind of rotor and magneto.
Background technique
Environmental pollution and energy crisis promote new-energy automobile industry, especially electric car industry to flourish, automobile-used
Crucial execution unit one of of the driving motor as electric car, performance are most important for the performance of vehicle.Due to having
The advantages that higher power density and higher efficiency, magneto has been widely used in automobile drive motor field.In order to
The power density for promoting drive system, the mode for generalling use magneto and retarder cooperation to provide driving to electric car
Power.
Due to the special operating condition of electric car, usually require that drive system has higher power density, therefore forever
The maximum speed of magneto is usually higher.And higher revolving speed, also cause the centrifugal force of permanent magnet machine rotor larger, therefore rotor
Mechanical strength it is most important to the stable operation of magneto.At the same time, the lightweight of drive system is also that its development is answered
Critical issue.
As shown in Figure 1, be conventional rotor configuration schematic diagram, have on the rotor core 1 of the rotor multiple magnetic slots 11,
12, and there is magnet steel 2 in each magnetic slot 11,12.Due to the magnet steel 2 and magnetic in motor high speed rotation, on rotor core 1
Centrifugal force suffered by bridge 13 increases, and relatively thin magnetic bridge will lead to magnetic bridge fracture, so that magnet steel 2 and magnetic bridge 13 be made to disperse.In order to
The mechanical strength for promoting rotor core, generallys use the higher silicon steel sheet of intensity to reduce deformation when rotor high-speed cruising, mentions
Rise the mechanical strength of rotor.In addition the mechanical strength that key position can also be promoted using wider magnetic bridge 13, is used simultaneously
Biggish chamfering reduces stress, especially apart from rotor surface compared with the close and end positions of the biggish magnetic slot 11 in turning at.
However, in above-mentioned rotor, although high-intensitive silicon steel sheet can promote the mechanical strength of rotor and reduce rotor
Deformation, but the price of high-intensitive silicon steel sheet is relatively high, will greatly increase the cost of magneto entirety.Also, it is wider
Magnetic bridge 13 also will increase the leakage field of magneto while increasing mechanical strength, reduces the capacity of magneto, passes through
Torque performance is sacrificed to promote the mechanical strength of rotor and be unfavorable for realizing the peak use rate of magnet steel.
Further, since going repeated hole 14 to generally use rectangle or using about d-axis under each magnetic pole of rotor core 1
Symmetrical double rectangles, area of section is relatively small, is unfavorable for the abundant loss of weight of rotor.And go the addition meeting of repeated hole 14 so that
The stress of rotor key position increases, even greater than the yield stress limit of silicon steel material, especially 1 surface of rotor core
11 stress at magnetic slot.
Utility model content
The technical problem to be solved by the present invention is to for above-mentioned rotor core higher cost, be unfavorable for realizing magnetic
The problem of steel peak use rate, provides a kind of rotor and magneto.
The technical solution that the utility model solves above-mentioned technical problem is to provide a kind of rotor, including rotor core, described
Rotor core includes multiple circumferentially distributed magnetic poles；Each magnetic pole includes air groove, first for installing the first magnet steel
Magnetic slot and two the second magnetic slots for being respectively used to install the second magnet steel, first magnetic slot is about the straight of the magnetic pole
Axial symmetry, described two second magnetic slots are V-shaped symmetrical in the d-axis two sides of the magnetic pole, and the air groove is located at described
Between two the second magnetic slots, and the air groove is symmetrical about the d-axis of the magnetic pole；Under each second magnetic slot
The two side walls of magnetic bridge between end and the air groove are respectively parallel to the d-axis of the magnetic pole.
In rotor described in the utility model, the air groove includes that lateral wall, inner sidewall and two are respectively used to
The connection side wall of inner sidewall and lateral wall is connected, and the lateral wall is convex to the periphery of the rotor core.
In rotor described in the utility model, each magnetic pole include be located at the air groove inside one
A first removes repeated hole and two second are removed repeated hole；Described first go repeated hole, two second go repeated hole to be distributed in isosceles triangle, and it is described
First duplicate removal hole is located at the air groove and second and goes between repeated hole.
In rotor described in the utility model, described first go repeated hole about the magnetic pole d-axis it is symmetrical, described two
A second duplicate removal hole is located at symmetrical in the d-axis two sides of the magnetic pole.
In rotor described in the utility model, described first to remove repeated hole include roof, left side wall, right side wall and bottom
Wall, the roof are arranged close to the air groove, and the first side of the left side wall and the first side of right side wall are connected to described respectively
The two sides of roof, second side of the left side wall and second side of right side wall are connected to the two sides of the bottom wall respectively.
In rotor described in the utility model, the left side wall and right side wall are made of plane, and the left side wall
Two sides are tangent with the roof, bottom wall respectively, and the two sides of the right side wall are tangent with the roof, bottom wall respectively.
In rotor described in the utility model, each described second to remove repeated hole include upper side wall, lower wall and edge
Side wall, and the first side of the upper side wall connects with the first side of lower wall；The both ends of the edge side wall respectively with the upside
Second side of wall, second side of lower wall connect.
In rotor described in the utility model, described second go repeated hole edge side wall be plane, and the plane with
The sides aligned parallel of the magnetic pole；The two sides of the edge side wall are tangent with the upper side wall, lower wall respectively.
In rotor described in the utility model, the shape and size of first magnet steel and the second magnet steel are identical.
The utility model also provides a kind of magneto, including rotor as described above.
The rotor and magneto of the utility model have the advantages that by make the second magnetic slot and air groove it
Between magnetic bridge it is wide and parallel with the d-axis of magnetic pole, can promoted magnetic bridge intensity while, reduce the second magnet steel leakage field.
The utility model also passes through three weight for going repeated hole to reduce rotor core, is advantageously implemented the light of electric system
Quantization.And the repeated hole that goes of above structure is able to ascend the mechanical strength of duplicate removal hole location, and is formed and shunted to rotor stress,
Reduce the mechanical stress at other positions of rotor, the mechanical stress of magnetic bridge especially at rotor surface.
Detailed description of the invention
Fig. 1 is the schematic diagram of existing permanent magnetic electric machine rotor iron core；
Fig. 2 is the schematic diagram of the utility model rotor embodiment；
Fig. 3 is the schematic diagram of the embodiment of a magnetic pole of the utility model rotor；
Fig. 4 is the schematic diagram of another embodiment of a magnetic pole of the utility model rotor；
Fig. 5 is the overall structure stress schematic diagram of the utility model rotor；
Fig. 6 is the structural stress schematic diagram of existing rotor；
Fig. 7 is the Distribution of Magnetic Field schematic diagram at the air groove side magnetic bridge of the utility model rotor；
Fig. 8 is the Distribution of Magnetic Field schematic diagram at the air groove side magnetic bridge of existing rotor；
Fig. 9 is structural stress schematic diagram at the magnetic bridge of air groove side when air groove lateral wall is not raised；
Figure 10 is the rotor of the utility model and the output torque comparison diagram of the not raised rotor of air groove lateral wall.
Figure 11 is the schematic diagram of another embodiment of a magnetic pole of the utility model rotor；
Figure 12 is the schematic diagram that repeated hole is removed in existing rotor；
Figure 13 is structural stress schematic diagram at rotor duplicate removal hole in Figure 12；
Figure 14 is the schematic diagram that repeated hole is removed in another existing rotor；
Figure 15 is structural stress schematic diagram at rotor duplicate removal hole in Figure 14.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
It as shown in figures 2-3, is the schematic diagram of the utility model rotor embodiment, which can be applied to magneto.This
Rotor in embodiment includes rotor core 3, and rotor core 3 includes multiple circumferentially distributed magnetic poles；Each magnetic pole includes sky
Air drain 33, the first magnetic slot 31 for installing the first magnet steel (i.e. I type magnet steel) 4 and two are respectively used to the second magnet steel of installation
Second magnetic slot 32 of (i.e. V-type magnet steel) 5.Above-mentioned first magnetic slot 31 about magnetic pole d-axis Od (wherein O be rotor core 3
Center) symmetrically, two the second magnetic slots 32 are V-shaped symmetrical in the two sides of the d-axis Od of magnetic pole.Air groove 33 is located at two
Between a second magnetic slot 32, and air groove 33 is symmetrical about the d-axis Od of magnetic pole.The lower end of every one second magnetic slot 32 and sky
The two side walls of magnetic bridge 36 between air drain 33 are respectively parallel to the d-axis Od of magnetic pole, i.e. the d-axis Od of 36 parallel poles of magnetic bridge,
And the width of magnetic bridge 36 at various locations is equal.
In above-mentioned rotor, the second magnet steel 5 of two V-shaped placements in above-mentioned second magnetic slot 32 is conducive to promote magnet steel
Poly- magnetic effect places the first magnet steel 4 in conjunction with I type, is conducive to the torque output for promoting magneto, while being conducive to promote magnet steel
Anti- demagnetization capability, and facilitate reduce d-axis inductance, to promote the reluctance torque fan-out capability of motor.Particularly, on
It states 4, two piece of second magnet steel 5 of the first magnet steel and uses identical shape and size, advantageously reduce magnet steel cost, and then reduce entire
The manufacturing cost of magneto.
Above-mentioned rotor is by making the second magnetic slot 32 on rotor core 3 and the magnetic bridge 36 between air groove 33 in each position
It sets that wide and d-axis Od with magnetic pole is parallel, not only contributes to promote the mechanical strength at the magnetic bridge 36, and be conducive to the magnetic bridge
The reduction of 36 width, to reduce the leakage field at the magnetic bridge 36.As shown in Figure 5,6, relative to using non-parallel, not wide magnetic bridge
Structure, the rotor structure in the present embodiment are conducive to reduce the mechanical stress at magnetic bridge 36, make it below bending for silicon steel material
Take stress.As shown in Figure 7,8, using the rotor of traditional non-parallel and not wide magnetic bridge structure, the equivalent width of magnetic bridge is opposite
It is larger, and the rotor structure of the present embodiment is conducive to reduce the leakage field of the lower end of the second magnetic slot 32, to be conducive to avoid turning
The loss of square output.
Lateral wall 331 that above-mentioned air groove 33 includes, inner sidewall 334 and two are respectively used to connection 334 and of inner sidewall
The connection side wall 332,333 of lateral wall 331.Different from the air groove on conventional rotors iron core, as shown in figure 4, practical new at this
In another embodiment of type, the lateral wall 331 of air groove 33 is convex to the periphery of rotor core 3.By this way, sky can be increased
The volume of air drain 33 is conducive to the weight for reducing rotor core 3, and the machinery that the structure advantageously reduces at magnetic bridge 36 is answered
Power.
Fig. 9 is not using the stress envelope of the rotor structure of arc convex formula air groove, it can be seen from the figure that the biography
System rotor structure corresponds to mechanical stress at magnetic bridge larger, maximum stress 398.3MPa, greater than the yield stress of silicon steel material.
Simultaneously as the lateral wall 331 of air groove 33 uses arc convex, be conducive to the poly- magnetic effect of the second magnet steel 32,
D-axis inductance can be reduced on the basis of not influencing quadrature axis magnetic circuit, to promote reluctance torque fan-out capability.Referring to Figure 10, in phase
Under same current conditions, the above-mentioned torque output capability for being conducive to be promoted magneto using 331 convex type air groove of lateral wall.
As shown in figure 11, in another embodiment of the utility model rotor, each magnetic pole includes one first and removes repeated hole
34 and two second remove repeated hole 35, and above three go repeated hole be located at air groove 33 inside (be located at air groove 33 with
Between the shaft of rotor).Above-mentioned first goes repeated hole 34, two second repeated hole 35 is gone to be distributed in isosceles triangle, and first removes repeated hole 34
It is gone between repeated hole 35 positioned at air groove 33 and second.
Above-mentioned first go repeated hole 34 about magnetic pole d-axis Od it is symmetrical, two second go repeated hole 35 to be located at the d-axis in magnetic pole
The two sides Od are symmetrical.
Specifically, above-mentioned first repeated hole 34 is gone to include roof 341, left side wall 342, right side wall 343 and bottom wall 344,
Middle roof 341 is arranged close to air groove 33, and the first side of left side wall 342 and the first side of right side wall 343 are connected to roof 341 respectively
Two sides, second side of left side wall 342 and second side of right side wall 343 are connected to the two sides of bottom wall 344 respectively.Particularly, roof
341, low wall 344 can be made of oval calotte respectively, and left side wall 342 and right side wall 343 are made of plane respectively, and left side wall
342 two sides are tangent with roof 341, bottom wall 44 respectively, and the two sides of right side wall 343 are tangent with roof 341, bottom wall 344 respectively.
Every 1 second to remove repeated hole 35 include upper side wall 351, lower wall 352 and edge side wall 353, and upper side wall 351
First side connects with 352 first side of lower wall；The both ends of edge side wall 353 respectively with second side of upper side wall 351, lower wall
352 second side connects.Particularly, second go the upper side wall 351 of repeated hole 35, lower wall 352 that can be made of respectively oval calotte,
Edge side wall 353 can be then made of plane, and the sides aligned parallel of the plane and magnetic pole.Distinguish the two sides of above-mentioned edge side wall 353
It is tangent with upper side wall 351, lower wall 352.
Repeated hole is removed by above three, it is possible to increase the area for removing repeated hole is conducive to rotor core loss of weight, and reduces duplicate removal
The mechanical stress of hole location, meanwhile, this kind of duplicate removal pore structure is conducive to the dispersion of stress, can reduce its to rotor core its
The influence of his position mechanical strength.Comparison diagram 11,12,14 under equal conditions uses two relative to rotor core 7 in Figure 12
It is a to remove repeated hole 71 (the sum of two areas of section for removing repeated hole 71 are 110.1 square millimeters) and relative to rotor iron in Figure 14
Core 8 uses the scheme (individually going the area of section of repeated hole 81 for 104.3 square millimeters) for individually removing repeated hole 81, using three duplicate removals
The area of section for removing repeated hole can be risen to 121.4 square millimeters by the structure in hole.And comparison diagram 5,13,15 is gone using three
The structure of repeated hole can will further decrease structural stress at magnetic bridge 36 and close to the structure at the magnetic bridge of the periphery of rotor core 3
Stress.
The utility model also provides a kind of magneto, which can reduce rotor high-speed cruising mechanical stress and mention
Rise electromagnetic performance.The magneto includes casing, rotor and stator as shown in Figure 2, and above-mentioned rotor and stator are installed in
In casing, and there is air gap (width of air gap and power grade, the rotor core of motor between rotor outer wall and the inner wall of stator
Magnetic steel material selected by the first magnet steel 4, the second magnet steel 5 in 3 and stator processing are related with assembly technology).
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should
It is subject to the protection scope in claims.
Claims (10)
1. a kind of rotor, which is characterized in that including rotor core, the rotor core includes multiple circumferentially distributed magnetic poles；Often
One magnetic pole includes that air groove, the first magnetic slot for installing the first magnet steel and two are respectively used to the second magnet steel of installation
The second magnetic slot, first magnetic slot is symmetrical about the d-axis of the magnetic pole, and described two second magnetic slots are in the magnetic
The d-axis two sides of pole are V-shaped symmetrical, and the air groove is between described two second magnetic slots, and the air groove closes
It is symmetrical in the d-axis of the magnetic pole；The two side walls of magnetic bridge between the lower end and the air groove of each second magnetic slot
It is respectively parallel to the d-axis of the magnetic pole.
2. rotor according to claim 1, which is characterized in that the air groove includes lateral wall, inner sidewall and two
It is respectively used to the connection side wall of connection inner sidewall and lateral wall, and the lateral wall is convex to the periphery of the rotor core.
3. rotor according to claim 1, which is characterized in that each magnetic pole includes being located at the air groove
One first of inside removes repeated hole and two second are removed repeated hole；Described first go repeated hole, two second go repeated hole in isosceles triangle point
Cloth, and first duplicate removal hole is located at the air groove and second and goes between repeated hole.
4. rotor according to claim 3, which is characterized in that described first goes repeated hole about the d-axis pair of the magnetic pole
Claim, described two second duplicate removals hole is positioned at symmetrical in the d-axis two sides of the magnetic pole.
5. rotor according to claim 3, which is characterized in that described first to remove repeated hole include roof, left side wall, right side wall
And bottom wall, the roof are arranged close to the air groove, the first side of the left side wall and the first side of right side wall connect respectively
In the two sides of the roof, second side of the left side wall and second side of right side wall are connected to the two sides of the bottom wall respectively.
6. rotor according to claim 5, which is characterized in that the left side wall and right side wall are made of plane, and described
The two sides of left side wall are tangent with the roof, bottom wall respectively, and the two sides of the right side wall are tangent with the roof, bottom wall respectively.
7. rotor according to claim 3, which is characterized in that each described second to remove repeated hole include upper side wall, lower wall
And edge side wall, and the first side of the upper side wall connects with the first side of lower wall；The both ends of the edge side wall respectively with
Second side of the upper side wall, second side of lower wall connect.
8. rotor according to claim 7, which is characterized in that described second goes the edge side wall of repeated hole for plane, and institute
State the sides aligned parallel of plane Yu the magnetic pole；The two sides of the edge side wall are tangent with the upper side wall, lower wall respectively.
9. according to claim 1, which is characterized in that the shape and size of first magnet steel and the second magnet steel are identical.
10. a kind of magneto, which is characterized in that including rotor as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820980648.3U CN208316442U (en) | 2018-06-25 | 2018-06-25 | Rotor and magneto |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820980648.3U CN208316442U (en) | 2018-06-25 | 2018-06-25 | Rotor and magneto |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208316442U true CN208316442U (en) | 2019-01-01 |
Family
ID=64708851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820980648.3U Active CN208316442U (en) | 2018-06-25 | 2018-06-25 | Rotor and magneto |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208316442U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212666A (en) * | 2019-05-16 | 2019-09-06 | 广州小鹏汽车科技有限公司 | Rotor punching structure, stator punching and electric machine structure |
| WO2021134276A1 (en) * | 2019-12-30 | 2021-07-08 | 安徽威灵汽车部件有限公司 | Rotor of electric motor, driving electric motor, and vehicle |
| DE102020115286A1 (en) | 2020-06-09 | 2021-12-09 | Schaeffler Technologies AG & Co. KG | Electric motor with pockets for holding magnets |
-
2018
- 2018-06-25 CN CN201820980648.3U patent/CN208316442U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212666A (en) * | 2019-05-16 | 2019-09-06 | 广州小鹏汽车科技有限公司 | Rotor punching structure, stator punching and electric machine structure |
| WO2021134276A1 (en) * | 2019-12-30 | 2021-07-08 | 安徽威灵汽车部件有限公司 | Rotor of electric motor, driving electric motor, and vehicle |
| US12003140B2 (en) | 2019-12-30 | 2024-06-04 | Anhui Welling Auto Parts Co., Ltd. | Rotor for motor, drive motor and vehicle |
| DE102020115286A1 (en) | 2020-06-09 | 2021-12-09 | Schaeffler Technologies AG & Co. KG | Electric motor with pockets for holding magnets |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |