CN202334044U - Rotor and electric motor - Google Patents
Rotor and electric motor Download PDFInfo
- Publication number
- CN202334044U CN202334044U CN 201120443676 CN201120443676U CN202334044U CN 202334044 U CN202334044 U CN 202334044U CN 201120443676 CN201120443676 CN 201120443676 CN 201120443676 U CN201120443676 U CN 201120443676U CN 202334044 U CN202334044 U CN 202334044U
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- rotor
- rotor core
- core
- axial direction
- pack
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Abstract
The utility model relates to a rotor (20) for electric motor, include: a rotor core (22) composed of a plurality of rotor laminations (24) stacked in an axial direction of the rotor core and having a plurality of magnet slots (26) formed therein extending therethrough in the axial direction of the rotor core; and a plurality of permanent magnets (40) respectively embedded in the magnet slots of the rotor core so as to form a plurality of magnetic poles (28) on the radially outer edge of the rotor core, the magnetic poles being arranged at the same angular intervals in the circumferential direction of the rotor core, wherein a rotor slot (30) is formed between two adjacent magnetic poles of the rotor core, the rotor slot extending obliquely with respect to the axial direction of the rotor core. The utility model discloses still relate to an electric motor (1) including this rotor. Adopt the utility model discloses a rotor can effectively reduce the cogging torque that produces in this type of electric motor.
Description
Technical field
The application relates to a kind of electro-motor that is used for the rotor of electro-motor and comprises this rotor.
Background technology
The application of embedded rare earth permanent magnet electro-motor more and more widely.Yet because the interaction between rotor and the stator slot, the torque (being also referred to as cogging torque) in this electro-motor is bigger, can cause the noise problem big with vibration.
At present, eliminate or a kind of method of reducing this torque is that stator slot is arranged to skewed slot.But this method only is fit to distributed winding motor, and is not suitable for centralized winding motor.Another kind method is that rotor design is become multisection type, and each section certain angle that staggers is shown in figure 10.But this scheme still can still have the torque of pausing quite greatly to exist owing to flux change is discontinuous.And adopt this mode, and the manufacturing process more complicated of rotor, cost is higher.
The utility model content
The purpose of one or more embodiment of the utility model provides a kind of rotor that can eliminate the torque in the embedded rare earth permanent magnet electro-motor better.
Another purpose of one or more embodiment of the utility model provides a kind of electro-motor that can eliminate a torque better.
An aspect of this specification provides a kind of rotor that is used for electro-motor; Comprise: rotor core, said rotor core are made up of the stacked rotor pack of axial direction of the said rotor core in a plurality of edges and the axial direction that in said rotor core, is formed with the said rotor core in a plurality of edges runs through the magnet slot of extension; With a plurality of permanent magnets; Said permanent magnet is embedded into respectively in the magnet slot of said rotor core so that on the radially outer edge of said rotor core, form a plurality of magnetic poles; The circumferencial direction of the said rotor core in said magnetic pole edge is with identical angular interval setting; Wherein, between two of said rotor core adjacent magnetic poles, be formed with rotor, said rotor is extended with respect to the axial direction of said rotor core obliquely.
Preferably, being formed on magnet slot in each rotor pack is of similar shape with size and along the axial direction complete matching of said rotor core.
Preferably, be formed on that rotor in each rotor pack is of similar shape with size but differ from one another with respect to the position, angle of the rotation of said rotor core.
Preferably, the position, angle that is formed on the rotor in each rotor pack according to order from an end of said rotor core to the other end of said rotor core with respect to the rotation of said rotor core successively along identical direction deflection predetermined angular.
Preferably, the rotor that is positioned at rotor core one end is with respect to rotation deflection 5～15 degree of the rotor that is positioned at the rotor core other end around said rotor core.
Preferably, the quantity of supposing rotor pack is n, and the deflection angle between the rotor at rotor core two ends is γ, and the deflection angle between the rotor in then any two adjacent rotors laminations is γ/n.
Preferably, the two ends of each magnet slot are formed with air gap portion, and permanent magnet does not extend in the said air gap portion.
Preferably, said magnet slot forms the V-arrangement of straight shape, V-arrangement, arc or butt.
Preferably, said rotor forms on the outer surface of said rotor core.
Preferably, said rotor forms in the outer peripheral edges portion of said rotor core and is not unlimited towards the outer surface of said rotor core.
Preferably, the quantity of said magnet slot is identical with the quantity of said rotor.
Preferably, the quantity of the quantity of said magnet slot and said rotor is even number.
Preferably, the line of the mid point of the magnetic pole on each rotor pack extends with respect to the axial direction of said rotor core obliquely.
Another aspect of this specification provides a kind of electro-motor that comprises above-mentioned rotor.
Be according to the rotor of one or more embodiment of the utility model and/or the advantage of electro-motor: in rotor according to the utility model execution mode; Rotor between each magnetic pole is extended with respect to the axial direction of rotor core obliquely; Actual measurement shows, adopts this structure can reduce even eliminate the torque in the permanent-magnet electric motor greatly.In addition, the magnet slot in the rotor core remains along the axial direction of rotor core extends straightly, therefore can be easily the permanent magnet of flat pattern be inserted in these magnet slot.Therefore, when reducing or having eliminated a torque, there is not too much to increase the difficulty of assembling.
Description of drawings
Through following description with reference to accompanying drawing, the feature and advantage of one or several embodiment of the utility model will become and be more prone to understand, wherein:
Fig. 1 is the schematic plan according to the electro-motor of a kind of execution mode of the utility model;
Fig. 2 is the exploded perspective view of the rotor of electro-motor shown in Figure 1;
Fig. 3 is the part sectional block diagram of the rotor of electro-motor shown in Figure 1;
Fig. 4 is the sketch map of the rotor pack of rotor shown in Figure 2;
Fig. 5 is the sketch map of one of them rotor pack shown in Figure 4;
Fig. 6 A and 6B are respectively the vertical views of two rotor packs at rotor core two ends;
Fig. 7 is the comparison diagram according to a torque of the rotor of the utility model execution mode and conventional rotor;
Fig. 8 A-8D shows the rotor according to the multi-form magnet slot of having of other execution modes of the utility model;
Fig. 9 A-9D shows the rotor according to the multi-form rotor of having of other execution modes of the utility model;
Figure 10 shows a kind of sectional type rotor of prior art.
Embodiment
Following description related to the preferred embodiment only is exemplary, and never is the restriction to the utility model and application or usage.
To the electro-motor according to a kind of execution mode of the utility model be described with reference to Fig. 1-7 below.Wherein, Fig. 1 is the schematic plan according to the electro-motor of a kind of execution mode of the utility model; Fig. 2 is the exploded perspective view of the rotor of electro-motor shown in Figure 1; Fig. 3 is the part sectional block diagram of the rotor of electro-motor shown in Figure 1; Fig. 4 is the sketch map of the rotor pack of rotor shown in Figure 2; Fig. 5 is the sketch map of one of them rotor pack shown in Figure 4; Fig. 6 A and 6B are respectively the vertical views of two rotor packs at rotor core two ends; Fig. 7 is the comparison diagram according to a torque of the rotor of the utility model execution mode and conventional rotor.
As shown in the figure, electro-motor 1 comprise generally comprise stator 10 with can be in stator 10 rotor rotated 20.Rotor 20 can cooperate with the rotating shaft (not shown) with the output revolving force.
With reference to Fig. 2, between two of rotor core 22 adjacent magnetic poles 28, be formed with rotor 30, rotor 30 is configured to extend obliquely with respect to the axial direction of rotor core 22.Rotor 30 can have identical quantity with magnet slot 26.In addition; With reference to Fig. 3; In the structure of the utility model; Magnet slot 26 forms to extend along the axial direction of rotor core 22 straightly and makes the permanent magnet 40 of flat pattern shown in Figure 2 can be easily inserted in these magnet slot 26, and the axial direction that rotor 30 forms with respect to rotor core 22 extends obliquely, thereby in the easy assembleability of having guaranteed rotor 20, greatly reduces the torque in the electro-motor.Fig. 7 shows the comparison of a torque that produces according to rotor that rotor 30 is formed skewed slot of the utility model execution mode 20 and the conventional rotor that rotor slot shape is become the straight trough that extends along the axial direction of rotor core of actual measurement.In Fig. 7, transverse axis is represented the anglec of rotation of rotor, and the longitudinal axis is represented a torque, and dotted line is represented a torque of conventional straight trough rotor, and chain-dotted line is represented the torque according to the skewed rotor of the utility model.As can be seen from Figure 7, the skewed rotor of the utility model can greatly reduce a torque.
Following mask body is described the structure of each rotor pack 24 that constitutes rotor core 22 with reference to figure 4-6.As shown in Figure 4, rotor core 22 comprises a plurality of rotor packs 24, and these rotor packs 24 are stacked along the axial direction of rotor core 22.On each rotor pack 24, all be formed with magnet slot 26 and rotor 30.
With reference to Fig. 6 A-6B, wherein Fig. 6 A shows a slice rotor pack 24A of rotor core 22 1 ends shown in Figure 4 (for example top) simultaneously, and Fig. 6 B shows a slice rotor pack 24B of rotor core 22 other ends shown in Figure 4 (for example bottom).As shown in the figure, be formed on magnet slot 26 in each rotor pack 24 and be of similar shape, thereby in rotor core 22, form the magnet slot 26 of straight extension in axial direction with size and along the axial direction complete matching of rotor core 22.As shown in Figure 5, can form air gap portion 27 at the two ends of magnet slot 26 so that the Distribution of Magnetic Field of optimization to be provided.Permanent magnet 40 can not extend in the air gap portion 27.
In addition, the rotor 30 that is formed in each rotor pack 24 is of similar shape and size, but these rotor 30 differ from one another with respect to the position, angle of the rotation O of rotor core 22.Particularly, be formed on the position, angle of the rotor 30 in each rotor pack 24 can be according to order from an end of rotor core to the other end of rotor core with respect to the rotation O of rotor core 22 successively along identical direction deflection predetermined angular.The yawing moment of each rotor 30 can be identical with the direction of rotation of rotor 20, also can be opposite with the direction of rotation of rotor 20.In addition, preferably, the rotor 30 in any two adjacent rotors laminations 24 can the identical predetermined angular of deflection.In this case, the line P of the mid point of the magnetic pole on each rotor pack 24 also extends with respect to the axial direction of rotor core 22 obliquely, and is as shown in Figure 4.
Shown in Fig. 6 A and 6B; The position, angle of supposing one of them rotor 30 is expressed as the angle between the vertical direction OY of central axis OX and rotor pack 24 of rotor 30; The position, angle of rotor 30 that then is arranged in the rotor pack 24A on rotor core 22 tops is α, and the position, angle of rotor 30 that is arranged in the rotor pack 24B of rotor core 22 bottoms is β.In a kind of preferred implementation, the difference γ between α and the β can be 5～15 degree.In other words, the rotor 30 that is positioned at rotor core one end rotates the rotation O of sub-iron core with respect to the rotor that is positioned at the rotor core other end 30 can deflection 5～15 degree.Other deflection angle also is feasible and depends on the balanced design between a torque and the reluctance torque, repeats no more at this.
In addition, the quantity of supposing rotor pack 24 is n, and the deflection angle between the rotor at rotor core two ends is γ, and the deflection angle between the rotor 30 in then any two adjacent rotors laminations 24 is γ/n.
In the execution mode shown in Fig. 1-6, be formed with four magnet slot 26, four magnetic poles 28 and four rotor 30.But, it should be appreciated by those skilled in the art that the quantity of magnet slot and rotor is not limited thereto, and the time can be any even number, for example 2,6 or 8 etc.For example, Fig. 9 A shows six magnet slot and six rotor.
In the execution mode shown in Fig. 1-6, show and form the roughly magnet slot 26 of flat shape.But, it should be appreciated by those skilled in the art that the shape of magnet slot 26 is not limited thereto, but can be designed to various other shapes as required that for example, Fig. 8 A-8D shows the V-arrangement that forms straight shape, V-arrangement, butt or the magnet slot 26 of arc respectively.
In addition, the also shape of not concrete restrict rotor groove 30 in the utility model, its shaped design can be with reference to the design of conventional straight trough rotor to realize specific purpose.For example, Fig. 9 A-9D shows other forms of rotor 30 respectively.Particularly, shown in Fig. 5 and 9A-9C, rotor 30 can be formed on the outer surface of said rotor core; For example shown in Fig. 9 D, rotor 30 can also be formed in the outer peripheral edges portion of rotor core 22 and not open wide towards the outer surface of rotor core 22.
Although described the various execution modes of the utility model in detail at this; But should be appreciated that the utility model is not limited to the embodiment of describing in detail and illustrating here, under the situation of essence that does not depart from the utility model and scope, can realize other modification and variant by those skilled in the art.All these modification and variant all fall in the scope of the utility model.And all members described here can be replaced by the member that is equal on the other technologies property.
Claims (14)
1. rotor (20) that is used for electro-motor comprising:
Rotor core (22), said rotor core are made up of the stacked rotor pack (24) of the axial direction of the said rotor core in a plurality of edges and the axial direction that in said rotor core, is formed with the said rotor core in a plurality of edges runs through the magnet slot (26) of extension; With
A plurality of permanent magnets (40); Said permanent magnet is embedded into respectively in the magnet slot (26) of said rotor core (22) so that on the radially outer edge of said rotor core, form a plurality of magnetic poles (28); The circumferencial direction of the said rotor core in said magnetic pole edge is with identical angular interval setting
Wherein, between two adjacent magnetic poles of said rotor core (22), be formed with rotor (30), said rotor is extended with respect to the axial direction of said rotor core (22) obliquely.
2. rotor as claimed in claim 1 wherein is formed on magnet slot (26) in each rotor pack (24) and is of similar shape with size and along the axial direction complete matching of said rotor core (22).
3. but rotor as claimed in claim 1 is formed on wherein that rotor (30) in each rotor pack (24) is of similar shape with size differs from one another with respect to the position, angle of the rotation of said rotor core (22).
4. rotor as claimed in claim 3, the position, angle that wherein is formed on the rotor (30) in each rotor pack (24) according to order from an end of said rotor core to the other end of said rotor core with respect to the rotation of said rotor core (22) successively along identical direction deflection predetermined angular.
5. rotor as claimed in claim 4, the rotor that wherein is positioned at rotor core one end is with respect to rotation deflection 5～15 degree of the rotor that is positioned at the rotor core other end around said rotor core.
6. rotor as claimed in claim 4, the quantity of wherein supposing rotor pack is n, and the deflection angle between the rotor at rotor core two ends is γ, and the deflection angle between the rotor in then any two adjacent rotors laminations is γ/n.
7. rotor as claimed in claim 1, wherein the two ends of each magnet slot are formed with air gap portion (27), and permanent magnet (40) does not extend in the said air gap portion (27).
8. rotor as claimed in claim 1, wherein said magnet slot (26) forms the V-arrangement of straight shape, V-arrangement, arc or butt.
9. rotor as claimed in claim 1, wherein said rotor (30) is formed on the outer surface of said rotor core.
10. rotor as claimed in claim 1, wherein said rotor (30) are formed in the outer peripheral edges portion of said rotor core and do not open wide towards the outer surface of said rotor core.
11. rotor as claimed in claim 1, the quantity of wherein said magnet slot (26) is identical with the quantity of said rotor (30).
12. rotor as claimed in claim 11, the quantity of the quantity of wherein said magnet slot (26) and said rotor (30) is even number.
13. rotor as claimed in claim 1, wherein the line of the mid point of the magnetic pole on each rotor pack (24) extends with respect to the axial direction of said rotor core (22) obliquely.
14. an electro-motor (1) comprises like each described rotor (20) among the claim 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120443676 CN202334044U (en) | 2011-11-08 | 2011-11-08 | Rotor and electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120443676 CN202334044U (en) | 2011-11-08 | 2011-11-08 | Rotor and electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334044U true CN202334044U (en) | 2012-07-11 |
Family
ID=46446010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120443676 Expired - Lifetime CN202334044U (en) | 2011-11-08 | 2011-11-08 | Rotor and electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334044U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095007A (en) * | 2011-11-08 | 2013-05-08 | 艾默生环境优化技术(苏州)有限公司 | Rotor and electric motor |
| WO2016161685A1 (en) * | 2015-04-10 | 2016-10-13 | 睿能机电有限公司 | Permanent magnet rotor |
-
2011
- 2011-11-08 CN CN 201120443676 patent/CN202334044U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095007A (en) * | 2011-11-08 | 2013-05-08 | 艾默生环境优化技术(苏州)有限公司 | Rotor and electric motor |
| WO2016161685A1 (en) * | 2015-04-10 | 2016-10-13 | 睿能机电有限公司 | Permanent magnet rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
|
| CX01 | Expiry of patent term |