WO2019214223A1

WO2019214223A1 - Rotor structure, permanent magnet assisted synchronous reluctance motor and electric automobile

Info

Publication number: WO2019214223A1
Application number: PCT/CN2018/119819
Authority: WO
Inventors: 谭建明; 胡余生; 陈彬; 肖勇; 卢素华; 童童
Original assignee: 珠海格力电器股份有限公司
Priority date: 2018-05-08
Filing date: 2018-12-07
Publication date: 2019-11-14
Also published as: CN108711973A

Abstract

Provided in the present invention are a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric automobile. The rotor structure comprises: a rotor body, the rotor body being opened thereon with a permanent magnet groove set, and the permanent magnet groove set comprising an inner layer permanent magnet groove and an outer layer permanent magnet groove, wherein the inner layer permanent magnet groove and the outer layer permanent magnet groove are outwardly disposed at an interval in the radial direction of the rotor body; a magnetic separation bridge, a first end of the magnetic separation bridge being connected to a first side wall of the inner layer permanent magnet groove, and a second end of the magnetic separation bridge extending in the radial direction of the rotor body and being connected to a second side wall opposite to the first side wall of the inner layer permanent magnet groove. By providing a magnetic separation bridge within an inner layer permanent magnet, the mechanical strength of the rotor structure may be effectively improved, and the efficiency of a motor having the described structure may be effectively improved.

Description

Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric vehicle

Technical field

The present invention relates to the technical field of electric vehicle equipment, and in particular to a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric vehicle.

Background technique

Electric vehicles have the characteristics of energy saving and environmental protection, and have been rapidly developed. Existing electric vehicle drive motors In order to realize the high power density and high efficiency of the motor, more and more motors use high performance rare earth permanent magnet motors. Rare earth permanent magnet motors can achieve high efficiency and high power density, mainly relying on high-performance rare earth permanent magnets. The most widely used NdFeB rare earth permanent magnets. However, rare earth is a non-renewable resource, the price is relatively expensive, and the fluctuation of rare earth price is also large, which leads to high production cost of electric vehicle driving motor, which is very unfavorable for promoting the comprehensive development of electric vehicle. Further, in the prior art, a ferrite permanent magnet auxiliary synchronous reluctance motor is also applied to an electric vehicle, but the motor has problems of high noise, easy demagnetization, and low efficiency.

Summary of the invention

The main object of the present invention is to provide a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric vehicle to solve the problem of low efficiency of the motor in the prior art.

In order to achieve the above object, according to an aspect of the invention, a rotor structure is provided, comprising: a rotor body having a permanent magnet slot group formed thereon, the permanent magnet slot group including an inner layer permanent magnet slot and an outer layer permanent magnet slot The inner permanent magnet slot and the outer permanent magnet slot are spaced outwardly along the radial direction of the rotor body; the magnetic bridge, the first end of the magnetic bridge is connected to the first sidewall of the inner permanent magnet slot, A second end of the magnetic bridge extends in a radial direction of the rotor body and is coupled to a second side wall opposite the first side wall of the inner permanent magnet slot.

Further, a first connecting through hole is opened in the magnetic isolation bridge.

Further, the first end and the second end of the inner permanent magnet slot extend along the radial direction of the rotor body toward the outer edge of the rotor body, the first end of the inner permanent magnet slot and the second inner permanent magnet slot The ends are oppositely disposed and located on opposite sides of the straight shaft of the rotor body, and the first end and the second end of the outer permanent magnet groove extend along the radial direction of the rotor body toward the outer edge of the rotor body, and the outer permanent magnet groove The first end and the second end of the outer permanent magnet slot are oppositely disposed on opposite sides of the straight shaft, and the first end of the inner permanent magnet slot is disposed adjacent to the first end of the outer permanent magnet slot, and is disposed The distance between the first end of the layer permanent magnet slot and the first end of the outer layer permanent magnet slot gradually increases outward in the radial direction of the rotor body, the second end of the inner permanent magnet slot and the outer permanent magnet slot The distance between the second ends gradually increases outward in the radial direction of the rotor body.

Further, a second connecting hole is formed in the magnetic conductive channel between the first end of the inner permanent magnet slot and the first end of the outer permanent magnet slot, and/or the second permanent magnet slot is located in the inner layer A third connecting hole is formed in the magnetic conductive path between the end and the second end of the outer permanent magnet slot.

Further, the first end of the inner permanent magnet slot and the first end of the outer permanent magnet slot are located at the front of the rotating direction of the rotor body, the second end of the inner permanent magnet slot and the second end of the outer permanent magnet slot The end is located at the rear of the rotating direction of the rotor body, and a fourth connecting hole is formed in the magnetic guiding channel between the second end of the inner permanent magnet slot and the second end of the outer permanent magnet slot.

Further, a first buckle point is disposed on the magnetic conductive channel between the first end of the inner permanent magnet slot and the first end of the outer permanent magnet slot, and/or the second permanent magnet slot is located A second buckle is formed on the magnetic flux path between the end and the second end of the outer permanent magnet slot.

Further, a first fastening point is disposed on the magnetic conductive channel between the first end of the inner permanent magnet slot and the first end of the outer permanent magnet slot, and the second end and the outer layer of the inner permanent magnet slot are disposed A second buckle point is defined on the magnetic flux path between the second ends of the permanent magnet slots, and the first buckle point and the second buckle point are asymmetrically disposed about a straight axis of the rotor body.

Further, the first end of the inner permanent magnet slot and the first end of the outer permanent magnet slot are located at the front of the rotating direction of the rotor body, the second end of the inner permanent magnet slot and the second end of the outer permanent magnet slot The end is located at the rear of the rotation direction of the rotor body, and the extension line of the geometric center line of the longitudinal direction of the first buckle point has an angle B with the extension line of the groove wall of the first end of the inner permanent magnet groove, and the second buckle point The extension of the geometric centerline in the length direction has an angle A with the extension of the slot wall of the second end of the inner permanent magnet slot, where A is an acute angle and/or B is an acute angle.

Further, A>B.

According to another aspect of the present invention, a rotor structure is provided, comprising: a rotor body having a permanent magnet slot group formed thereon, the permanent magnet slot group including an inner layer permanent magnet slot and an outer layer permanent magnet slot, the inner layer permanent a magnet slot and an outer permanent magnet slot are spaced outwardly in a radial direction of the rotor body; the first end and the second end of the inner permanent magnet slot extend along a radial direction of the rotor body toward an outer edge of the rotor body, The first end of the inner permanent magnet slot and the second end of the inner permanent magnet slot are oppositely disposed and located on opposite sides of the straight axis of the rotor body, and the first end and the second end of the outer permanent magnet slot are along the rotor body a radial direction extending toward an outer edge of the rotor body, the first end of the outer permanent magnet slot and the second end of the outer permanent magnet slot being oppositely disposed and located on opposite sides of the straight axis, the first of the inner permanent magnet slots The end is disposed adjacent to the first end of the outer permanent magnet slot, and the distance between the first end of the inner permanent magnet slot and the first end of the outer permanent magnet slot gradually outwards along the radial direction of the rotor body Increase, the second end of the inner permanent magnet slot and the outer layer The distance between the second ends of the body grooves gradually increases outward in the radial direction of the rotor body, and is located on the magnetic conductive path between the first end of the inner permanent magnet groove and the first end of the outer permanent magnet groove There is a second connecting hole, and/or a third connecting hole is formed in the magnetic conductive path between the second end of the inner permanent magnet slot and the second end of the outer permanent magnet slot.

Further, A>B.

Further, the rotor structure further includes: a magnetic isolation bridge, the first end of the magnetic isolation bridge is connected to the first sidewall of the inner permanent magnet slot, and the second end of the magnetic bridge extends in a radial direction of the rotor body and The first sidewall of the inner permanent magnet slot is connected to the opposite second sidewall.

According to another aspect of the present invention, there is provided a permanent magnet assisted synchronous reluctance motor comprising a rotor structure which is the rotor structure described above.

According to another aspect of the present invention, an electric vehicle is provided comprising a rotor structure which is the permanent magnet rotor structure described above.

By applying the technical solution of the present invention, a magnetic isolation bridge is disposed in the inner layer permanent magnet, and the arrangement can effectively improve the mechanical strength of the rotor structure, and effectively improve the efficiency of the motor having the structure.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

Figure 1 is a schematic view showing the structure of a first embodiment of a rotor structure according to the present invention;

Figure 2 is a schematic view showing the structure of a second embodiment of a rotor structure according to the present invention;

Figure 3 is a schematic view showing the structure of a third embodiment of a rotor structure according to the present invention;

Figure 4 is a schematic view showing the structure of a fourth embodiment of a rotor structure according to the present invention;

Fig. 5 shows a schematic structural view of a fourth embodiment of a rotor structure according to the present invention.

Wherein, the above figures include the following reference numerals:

10, the rotor body; 11, the inner layer of permanent magnet slots; 12, the outer layer of permanent magnet slots;

20, magnetic bridge;

31, a first connecting through hole; 32, a second connecting hole; 33, a third connecting hole; 34, a fourth connecting hole;

41, the first deduction point; 42, the second deduction point;

50, permanent magnets.

detailed description

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

It is to be noted that the terminology used herein is for the purpose of describing particular embodiments, and is not intended to limit the exemplary embodiments. As used herein, the singular " " " " " " There are features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or order. It is to be understood that the terms so used are interchangeable as appropriate, such that the embodiments of the invention described herein can be implemented, for example, in a sequence other than those illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

For convenience of description, spatially relative terms such as "above", "above", "on top", "above", etc., may be used herein to describe as in the drawings. The spatial positional relationship of one device or feature to other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described. For example, if the device in the figures is inverted, the device described as "above other devices or configurations" or "above other devices or configurations" will be positioned "below other devices or configurations" or "at Under other devices or configurations." Thus, the exemplary term "above" can include both "over" and "under". The device can also be positioned in other different ways (rotated 90 degrees or at other orientations) and the corresponding description of the space used herein is interpreted accordingly.

Exemplary embodiments in accordance with the present application will now be described in more detail with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. It is to be understood that the embodiments are provided so that this disclosure will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art, in which The thicknesses of the layers and regions are denoted by the same reference numerals, and the description thereof will be omitted.

Referring to Figures 1 through 5, in accordance with an embodiment of the present invention, a rotor structure is provided.

Specifically, as shown in FIG. 1, the rotor structure includes a rotor body 10. The rotor body 10 is provided with a permanent magnet slot group, and the permanent magnet slot group includes an inner layer permanent magnet slot 11 and an outer layer permanent magnet slot 12. The inner permanent magnet slots 11 and the outer permanent magnet slots 12 are spaced outwardly in the radial direction of the rotor body 10. A magnetic bridge 20 is further disposed on the rotor body 10. The first end of the magnetic bridge 20 is connected to the first side wall of the inner permanent magnet slot 11, and the second end of the magnetic bridge 20 is along the radial direction of the rotor body 10. The direction extends and is connected to a second side wall opposite the first side wall of the inner permanent magnet slot 11.

In the present embodiment, the magnetic bridge is disposed in the inner layer permanent magnet, and the arrangement can effectively improve the mechanical strength of the rotor structure, and effectively improve the efficiency of the motor having the structure. With the rotor structure of this structure, the production cost of the rotor can be effectively reduced. There are a plurality of permanent magnet slot groups, and a plurality of permanent magnet slot groups are spaced apart along the circumferential direction of the rotor body 10.

The first connecting through hole 31 is defined in the magnetic isolation bridge 20 . This arrangement can conveniently connect and fix the rotor punching piece, effectively improving the stability of the rotor structure.

Further, the first end and the second end of the inner permanent magnet groove 11 extend toward the outer edge of the rotor body 10 in the radial direction of the rotor body 10. The first end of the inner permanent magnet slot 11 and the second end of the inner permanent magnet slot 11 are disposed opposite each other and on both sides of the straight axis d of the rotor body 10, and the first end and the second end of the outer permanent magnet slot 12 The end extends along the radial direction of the rotor body 10 toward the outer edge of the rotor body 10, the first end of the outer layer permanent magnet slot 12 and the second end of the outer layer permanent magnet slot 12 are oppositely disposed and located on the straight axis d a first end of the inner permanent magnet slot 11 is disposed adjacent to the first end of the outer permanent magnet slot 12, and the first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12 The distance between them gradually increases outward in the radial direction of the rotor body 10, and the distance between the second end of the inner permanent magnet slot 11 and the second end of the outer permanent magnet slot 12 is along the radial direction of the rotor body 10. Gradually increase outward. In the present embodiment, a magnetic conductive path (such as f1 in FIG. 1) is formed between the inner permanent magnet slot 11 and the outer permanent magnet slot 12, and the inner permanent magnet slot 11 and the outer permanent magnet slot 12 are opposite each other. When the distance between the ends is gradually increased, the width of the magnetic conductive passages is correspondingly gradually increased, wherein the inner permanent magnet slots 11 and the outer permanent magnet slots 12 are substantially U-shaped.

Specifically, in the embodiment, a second connecting hole 32 is defined in the magnetic conductive path between the first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12, and the inner permanent magnet is located A third connecting hole 33 is defined in the magnetic conductive path between the second end of the slot 11 and the second end of the outer layer permanent magnet slot 12. This arrangement can further improve the stability of the rotor.

The first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12 are located at the front of the rotor body 10 in the direction of rotation, the second end of the inner permanent magnet slot 11 and the outer permanent magnet slot 12 The second end is located at the rear of the rotating direction of the rotor body 10, and the fourth connecting hole 34 is defined in the magnetic conductive path between the second end of the inner permanent magnet slot 11 and the second end of the outer permanent magnet slot 12. . In this way, the mechanical strength of the rotor structure can be effectively improved under the premise of ensuring the stability of the rotor.

Of course, in another embodiment of the present application, a first buckle 41 is disposed on the magnetic conductive path between the first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12, A second buckle 42 is formed on the magnetic conductive path between the second end of the inner permanent magnet slot 11 and the second end of the outer permanent magnet slot 12. This arrangement also increases the stability of the rotor die connection.

The first buckle point 41 and the second buckle point 42 are asymmetrically arranged with respect to the straight axis of the rotor body 10 . This arrangement can improve the connection stability of the rotor structure.

Further, the first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12 are located at the front of the rotational direction of the rotor body 10, the second end of the inner permanent magnet slot 11 and the outer permanent magnet The second end of the groove 12 is located at the rear of the rotation direction of the rotor body 10, and the extension line of the geometric center line of the longitudinal direction of the first buckle point 41 and the extension line of the groove wall of the first end of the inner layer permanent magnet groove 11 have The angle B, the extension line of the geometric center line of the second buckle point 42 in the longitudinal direction has an angle A with the extension line of the groove wall of the second end of the inner layer permanent magnet slot 11, wherein A is an acute angle and B is an acute angle. And A>B. This arrangement can effectively improve the performance of the rotor structure.

In another embodiment of the present application, as shown in FIG. 2, the rotor structure includes a rotor body 10. The rotor body 10 is provided with a permanent magnet slot group including an inner layer permanent magnet slot 11 and an outer layer permanent magnet slot 12, and an inner layer permanent magnet slot 11 and an outer layer permanent magnet slot 12 along the radial direction of the rotor body 10. The directions are spaced outwardly. The first end and the second end of the inner permanent magnet slot 11 extend toward the outer edge of the rotor body 10 in the radial direction of the rotor body 10, the first end of the inner layer permanent magnet slot 11 and the inner layer permanent magnet slot 11 The second ends are oppositely disposed and located on opposite sides of the straight shaft of the rotor body 10, and the first end and the second end of the outer permanent magnet slot 12 extend toward the outer edge of the rotor body 10 in the radial direction of the rotor body 10, The first end of the outer permanent magnet slot 12 and the second end of the outer permanent magnet slot 12 are disposed opposite each other and on both sides of the straight axis, the first end of the inner permanent magnet slot 11 and the outer permanent magnet slot 12 The first ends are disposed adjacent to each other, and the distance between the first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12 gradually increases outward in the radial direction of the rotor body 10, and the inner layer is always The distance between the second end of the magnet groove 11 and the second end of the outer layer permanent magnet groove 12 gradually increases outward in the radial direction of the rotor body 10, and is located at the first end and the outer layer of the inner layer permanent magnet groove 11 A second connecting hole 32 is defined in the magnetic conductive path between the first ends of the magnet slots 12, and is located in the second inner permanent magnet slot 11 A third connecting hole 33 is defined in the magnetic conductive path between the end and the second end of the outer permanent magnet slot 12. This arrangement can effectively improve the stability of the rotor structure. That is, in the present embodiment, the difference from the above embodiment is that the magnetic bridge 20 is disposed in the inner layer permanent magnet slot 11 in the above embodiment, and in the embodiment, the inner permanent magnet slot 11 may not be provided with magnetic isolation. Bridge 20. Of course, it is also possible to simultaneously provide the magnetic bridge 20 and the second connecting hole 32 and the third connecting hole 33 on the rotor structure.

Specifically, as shown in FIG. 3, the first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12 are located at the front of the rotating direction of the rotor body 10 (f2 in FIG. 3), and the inner layer The second end of the permanent magnet slot 11 and the second end of the outer permanent magnet slot 12 are located at the rear of the rotor body 10 in the rotational direction, at the second end of the inner permanent magnet slot 11 and the outer permanent magnet slot 12 A fourth connecting hole 34 is defined in the magnetic conductive path between the two ends.

Of course, the rotor structure can also be arranged as shown in FIG. 4 and FIG. 5, and the magnetic conductive path between the first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12 is provided. A first buckle point 41, and/or a second buckle point 42 is formed on the magnetic flux path between the second end of the inner permanent magnet slot 11 and the second end of the outer layer permanent magnet slot 12. The first buckle point 41 and the second buckle point 42 are asymmetrically disposed about the straight axis of the rotor body 10. The first end of the inner permanent magnet slot 11 and the first end of the outer permanent magnet slot 12 are located at the front of the rotor body 10 in the direction of rotation, the second end of the inner permanent magnet slot 11 and the outer permanent magnet slot 12 The second end is located at the rear of the rotating direction of the rotor body 10, and the extension line of the geometric center line of the longitudinal direction of the first fastening point 41 has an angle B with the extension line of the groove wall of the first end of the inner permanent magnet groove 11. The extension line of the geometric center line of the second buckle point 42 in the longitudinal direction has an angle A with the extension line of the groove wall of the second end of the inner layer permanent magnet slot 11, wherein A is an acute angle and B is an acute angle. In this embodiment, the first end of the magnetic bridge 20 is connected to the first side wall of the inner permanent magnet slot 11, and the second end of the magnetic bridge 20 extends in the radial direction of the rotor body 10 and the inner layer. The second side wall of the first side wall of the permanent magnet slot 11 is connected.

The rotor structure in the above embodiment can also be used in the technical field of permanent magnet assisted synchronous reluctance motor devices, that is, according to another aspect of the present invention, a permanent magnet assisted synchronous reluctance motor is provided. The motor includes a rotor structure which is the rotor structure in the above embodiment.

Further, the above rotor structure can also be used in the technical field of electric vehicle equipment, that is, according to another aspect of the present invention, an electric vehicle including a rotor structure which is the rotor structure in the above embodiment is provided.

Specifically, the rotor structure effectively solves the problem that the rotor connection hole of the permanent magnet auxiliary synchronous reluctance motor and the self-deduction point reduce the performance of the motor. Improve the efficiency of the motor, reduce the cost of the motor, and increase the mechanical strength of the rotor.

By using a multi-layer permanent magnet 50, the motor rotor increases the salient pole ratio of the motor and increases the reluctance torque of the motor. Compared with the existing permanent magnet synchronous motor, the torque density of the motor can be significantly increased. The rotor core of the motor is generally formed by laminating a magnetically conductive silicon steel sheet. The rotor core is provided with a rotor punching connection hole, and the position of the connecting hole is generally disposed outside the outer permanent magnet of the rotor, and this part is usually magnetic flux. The density is high. When rotating at high speed, the screws or rivets in the connecting holes will also generate large eddy current loss, and the setting of the connecting holes will cause the efficiency of the motor to decrease.

By setting the low magnetic flux density of the magnetic bridge to the rotor punching connection hole, the efficiency drop caused by the arrangement of the rotor connecting holes is effectively alleviated.

A magnetic conductive channel is formed between the inner and outer permanent magnet grooves of the rotor, wherein the thickness of the magnetic conductive channel near the two sides has a shape gradually widening from the inner side to the outer side, and a rotor punching connection hole is arranged in the magnetic conductive channel region. By enlarging the thickness of the magnetic flux channel, the magnetic flux density at the connection hole of the punch can be effectively reduced, and the efficiency of the motor can be improved.

The rotor punching hole is only provided in the magnetic guiding channel on the back side of the rotor rotation direction. It is found that the magnetic flux density of the magnetic conductive channel on the rear side of the rotor rotating direction is lower than that of the rotating front side, which can further reduce the punching film. The effect of the connection holes on efficiency.

A magnetic conductive channel is formed between the inner and outer permanent magnet slots of the rotor, wherein the thickness of the magnetic conductive channel near the two sides has a shape gradually widening from the inner side to the outer side, and the self-deducting point of the rotor punching piece is disposed in the magnetic conductive channel area . The self-detaining point can be set in this area, and the cylindricity of the outer circumference of the rotor core after the rotor punching lamination can be increased, and the blocking of the rotor flux by the self-detaining point can be reduced, and the efficiency of the motor can be improved.

The self-deducting point of the rotor is asymmetrically distributed along the d-axis, wherein the center line of the buckle on the front side of the rotor in the longitudinal direction forms an acute angle B toward the outer side of the rotor with the inner surface of the inner permanent magnet groove, wherein the rear side of the rotor rotates The center line of the buckle point in the longitudinal direction forms an acute angle A toward the inner side of the rotor with the surface of the inner permanent magnet groove. Through this setting, the self-detaining point can be more compliant with the direction of the magnetic lines of force in different parts of the rotor in the longitudinal direction, and the blocking of the magnetic lines by the self-detaining point is reduced. Further, the acute angle A is larger than the acute angle B, and a better effect of reducing the magnetic line barrier can be obtained.

In addition to the above, it should be noted that "one embodiment", "another embodiment", "an embodiment" and the like referred to in the specification refers to a specific feature, structure or structure described in connection with the embodiment. Features are included in at least one embodiment of the general description of the application. The appearance of the same expression in various places in the specification does not necessarily refer to the same embodiment. Further, when a particular feature, structure, or feature is described in conjunction with any embodiment, it is claimed that such features, structures, or characteristics are also included in the scope of the invention.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A rotor structure, comprising:

a rotor body (10), the rotor body (10) is provided with a permanent magnet slot group, wherein the permanent magnet slot group comprises an inner layer permanent magnet slot (11) and an outer layer permanent magnet slot (12), the inner layer a permanent magnet slot (11) and the outer permanent magnet slot (12) are spaced outwardly in a radial direction of the rotor body (10);

a magnetic isolation bridge (20), a first end of the magnetic isolation bridge (20) is connected to a first side wall of the inner permanent magnet slot (11), and a second end of the magnetic isolation bridge (20) A second side wall extending in a radial direction of the rotor body (10) and opposite the first side wall of the inner layer permanent magnet groove (11) is connected.
The rotor structure according to claim 1, characterized in that the magnetic isolation bridge (20) is provided with a first connecting through hole (31).
The rotor structure according to claim 1, wherein the first end and the second end of the inner permanent magnet groove (11) face the rotor body in a radial direction of the rotor body (10) ( The outer edge of 10) extends, the first end of the inner permanent magnet slot (11) and the second end of the inner permanent magnet slot (11) are oppositely disposed and located on the rotor body (10) On both sides of the straight shaft, the first end and the second end of the outer permanent magnet slot (12) extend in a radial direction of the rotor body (10) toward an outer edge of the rotor body (10), a first end of the outer permanent magnet slot (12) and a second end of the outer permanent magnet slot (12) are oppositely disposed and located on opposite sides of the straight shaft, the inner permanent magnet slot ( a first end of 11) is disposed adjacent to the first end of the outer layer permanent magnet slot (12), and the first end of the inner layer permanent magnet slot (11) and the outer layer permanent magnet slot ( The distance between the first ends of 12) gradually increases outward in the radial direction of the rotor body (10), the second end of the inner permanent magnet slot (11) and the outer permanent magnet slot ( The distance between the second ends of 12) The radial direction of the rotor body (10) gradually increases outward.
The rotor structure according to claim 3, wherein a magnetic flux path is provided between the first end of the inner permanent magnet slot (11) and the first end of the outer permanent magnet slot (12) a second connection hole (32) is provided, and/or a magnetic field is located between the second end of the inner permanent magnet groove (11) and the second end of the outer layer permanent magnet groove (12) A third connecting hole (33) is opened in the passage.
The rotor structure according to claim 3, wherein the first end of the inner permanent magnet groove (11) and the first end of the outer permanent magnet groove (12) are located in the rotor body (10) a front portion of the rotation direction, the second end of the inner permanent magnet groove (11) and the second end of the outer permanent magnet groove (12) are located behind the rotation direction of the rotor body (10) A fourth connecting hole (34) is defined in the magnetic conductive path between the second end of the inner permanent magnet slot (11) and the second end of the outer permanent magnet slot (12).
The rotor structure according to claim 3, wherein a magnetic flux path is provided between the first end of the inner permanent magnet slot (11) and the first end of the outer permanent magnet slot (12) Provided with a first buckle point (41), and/or magnetically conductive between the second end of the inner permanent magnet slot (11) and the second end of the outer layer permanent magnet slot (12) A second buckle point (42) is opened on the passage.
The rotor structure according to claim 3, wherein a magnetic flux path is provided between the first end of the inner permanent magnet slot (11) and the first end of the outer permanent magnet slot (12) a first buckle point (41) is disposed on the magnetic conductive channel between the second end of the inner permanent magnet slot (11) and the second end of the outer layer permanent magnet slot (12) a second buckle point (42), the first buckle point (41) and the second buckle point (42) being asymmetrically disposed about a straight axis of the rotor body (10).
The rotor structure according to claim 7, wherein the first end of the inner permanent magnet groove (11) and the first end of the outer permanent magnet groove (12) are located in the rotor body (10) a front portion of the rotation direction, the second end of the inner permanent magnet groove (11) and the second end of the outer permanent magnet groove (12) are located behind the rotation direction of the rotor body (10) The extension line of the geometric center line of the first buckle point (41) in the longitudinal direction has an angle B with the extension line of the groove wall of the first end of the inner layer permanent magnet slot (11), An extension line of the geometric center line of the length direction of the second buckle point (42) has an angle A with an extension line of the groove wall of the second end of the inner permanent magnet groove (11), wherein A is an acute angle, and/or B is an acute angle.
The rotor structure of claim 8 wherein A>B.
A rotor structure, comprising:

a rotor body (10), the rotor body (10) is provided with a permanent magnet slot group, wherein the permanent magnet slot group comprises an inner layer permanent magnet slot (11) and an outer layer permanent magnet slot (12), the inner layer a permanent magnet slot (11) and the outer permanent magnet slot (12) are spaced outwardly in a radial direction of the rotor body (10);

A first end and a second end of the inner permanent magnet slot (11) extend in a radial direction of the rotor body (10) toward an outer edge of the rotor body (10), the inner layer permanent magnet a first end of the slot (11) and a second end of the inner permanent magnet slot (11) are disposed opposite each other and on either side of a straight axis of the rotor body (10), the outer permanent magnet slot ( The first end and the second end of 12) extend in a radial direction of the rotor body (10) toward an outer edge of the rotor body (10), the first end of the outer layer permanent magnet slot (12) Opposite the second end of the outer permanent magnet slot (12) and located on opposite sides of the straight shaft, the first end of the inner permanent magnet slot (11) and the outer permanent magnet slot a first end of (12) is disposed adjacently, and a distance between a first end of the inner permanent magnet slot (11) and a first end of the outer permanent magnet slot (12) along the rotor The radial direction of the body (10) gradually increases outwardly, the distance between the second end of the inner permanent magnet slot (11) and the second end of the outer permanent magnet slot (12) along the rotor The radial direction of the body (10) gradually increases outward, and the position a second connecting hole (32) is defined in the magnetic conductive path between the first end of the inner permanent magnet slot (11) and the first end of the outer permanent magnet slot (12), and/or A third connecting hole (33) is defined in the magnetic conductive path between the second end of the inner permanent magnet slot (11) and the second end of the outer permanent magnet slot (12).
The rotor structure according to claim 10, wherein the first end of the inner permanent magnet groove (11) and the first end of the outer permanent magnet groove (12) are located in the rotor body (10) a front portion of the rotation direction, the second end of the inner permanent magnet groove (11) and the second end of the outer permanent magnet groove (12) are located behind the rotation direction of the rotor body (10) A fourth connecting hole (34) is defined in the magnetic conductive path between the second end of the inner permanent magnet slot (11) and the second end of the outer permanent magnet slot (12).
The rotor structure according to claim 10, wherein a magnetic path between the first end of the inner permanent magnet slot (11) and the first end of the outer permanent magnet slot (12) Provided with a first buckle point (41), and/or magnetically conductive between the second end of the inner permanent magnet slot (11) and the second end of the outer layer permanent magnet slot (12) A second buckle point (42) is opened on the passage.
The rotor structure according to claim 10, wherein a magnetic path between the first end of the inner permanent magnet slot (11) and the first end of the outer permanent magnet slot (12) a first buckle point (41) is disposed on the magnetic conductive channel between the second end of the inner permanent magnet slot (11) and the second end of the outer layer permanent magnet slot (12) a second buckle point (42), the first buckle point (41) and the second buckle point (42) being asymmetrically disposed about a straight axis of the rotor body (10).
The rotor structure according to claim 13, wherein a first end of said inner permanent magnet groove (11) and a first end of said outer permanent magnet groove (12) are located in said rotor body (10) a front portion of the rotation direction, the second end of the inner permanent magnet groove (11) and the second end of the outer permanent magnet groove (12) are located behind the rotation direction of the rotor body (10) The extension line of the geometric center line of the first buckle point (41) in the longitudinal direction has an angle B with the extension line of the groove wall of the first end of the inner layer permanent magnet slot (11), An extension line of the geometric center line of the length direction of the second buckle point (42) has an angle A with an extension line of the groove wall of the second end of the inner permanent magnet groove (11), wherein A is an acute angle, and/or B is an acute angle.
The rotor structure of claim 14 wherein A > B.
The rotor structure according to claim 10, wherein the rotor structure further comprises:

a magnetic isolation bridge (20), a first end of the magnetic isolation bridge (20) is connected to a first side wall of the inner permanent magnet slot (11), and a second end of the magnetic isolation bridge (20) A second side wall extending in a radial direction of the rotor body (10) and opposite the first side wall of the inner layer permanent magnet groove (11) is connected.
A permanent magnet assisted synchronous reluctance machine comprising a rotor structure, characterized in that the rotor structure is the rotor structure according to any one of claims 1 to 16.
An electric vehicle comprising a rotor structure, characterized in that the rotor structure is the rotor structure according to any one of claims 1 to 16.