Rotor topological structure for high-speed motor of new energy automobile and motor

Abstract

The utility model relates to a rotor topological structure for a new energy automobile high speed motor and a motor, the structure comprises an iron core punching sheet, the iron core punching sheet comprises a plurality of magnetic poles distributed along the circumferential direction, the magnetic poles are provided with an inner layer magnetic steel groove group, the inner layer magnetic steel groove group comprises a middle magnetic steel groove and two first magnetic steel grooves, the two first magnetic steel grooves are symmetrically distributed with the plane where the axis of the iron core punching sheet is located as the symmetry plane, and the middle magnetic steel groove is arranged between the two first magnetic steel grooves. The magnetic steel groove is designed to be of a three-section structure comprising the two first magnetic steel grooves and the middle magnetic steel groove, the large magnetic steel groove space is achieved, more magnetic steel can be contained, and therefore the large peak torque is achieved. And four magnetic isolation bridges are formed between the adjacent magnetic steel grooves and between the magnetic steel grooves and the outer edge of the iron core punching sheet, so that the number of the magnetic isolation bridges is increased, the strength of the iron core punching sheet is further improved, and the maximum rotating speed of the motor is effectively improved. Therefore, the maximum rotating speed of the motor can be improved, and meanwhile the motor has the large peak torque.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of motor technology, specifically relates to a rotor topology structure and motor for new energy automobile high speed motor. BACKGROUND

[0002] In new energy vehicles, high-speed motors can respond faster to the acceleration demand of the driver, provide more rapid power output, and the high speed of the motor is an important dimension to improve the experience of new energy vehicles. Therefore, major car companies are competing to develop higher speed motors to achieve faster acceleration, higher speed and greater power of the whole vehicle.

[0003] The conventional V-shaped magnetic steel slot structure of the core punching sheet cannot balance the highest speed and peak torque of the motor, thereby affecting the acceleration performance of the whole vehicle. Based on this, the purpose of the present application is to provide a rotor topology structure that balances the highest speed and peak torque of the motor. SUMMARY

[0004] Based on the above description, the utility model provides a rotor topology structure for new energy automobile high speed motor to improve the highest speed of the motor and increase the peak torque.

[0005] The technical solution of the utility model to solve the above technical problem is as follows:

[0006] In the first aspect, the present application provides a rotor topology structure for new energy automobile high speed motor, and the technical solution adopted is as follows:

[0007] A rotor topology structure for new energy automobile high speed motor, comprising a core punching sheet, the core punching sheet comprises a plurality of magnetic poles distributed in the circumferential direction, the magnetic poles are provided with an inner layer magnetic steel slot group, the inner layer magnetic steel slot group comprises a middle magnetic steel slot and two first magnetic steel slots, the two first magnetic steel slots are symmetrically distributed with the plane where the axis of the core punching sheet as the symmetry plane, and the middle magnetic steel slot is arranged between the two first magnetic steel slots.

[0008] Preferably, the magnetic poles are further provided with an outer layer magnetic steel slot group, the outer layer magnetic steel slot group and the inner layer magnetic steel slot group are spaced apart along the radial direction of the core punching sheet and close to the center of the core punching sheet, the outer layer magnetic steel slot group comprises two second magnetic steel slots, the two second magnetic steel slots are symmetrically distributed, and the symmetry plane coincides with the symmetry plane of the two first magnetic steel slots.

[0009] Preferably, the middle magnetic steel slot is of a symmetrical structure, and the symmetry plane coincides with the symmetry plane of the two first magnetic steel slots.

[0010] Preferably, the first magnetic steel slot comprises a first end and a second end, the distance between the two first ends is greater than the distance between the two second ends, and the middle magnetic steel slot is arranged between the two second ends.

[0011] Preferably, a magnetic isolation bridge is formed between the intermediate magnetic steel slot and the first magnetic steel slot, the magnetic isolation bridge locally protrudes into the intermediate magnetic steel slot to form a limiting protrusion, and the limiting protrusions are used for mounting magnetic steels.

[0012] Preferably, when the magnetic steels are mounted in the intermediate magnetic steel slot, the limiting protrusions form gaps between the magnetic steels and the magnetic isolation bridge.

[0013] Preferably, the first magnetic steel slot comprises a mounting area and air gap areas located at both ends of the mounting area, and the mounting area is used for mounting magnetic steels.

[0014] Preferably, the outer edge of the core punching sheet is provided with a plurality of air grooves, and the air grooves are uniformly distributed along the circumference of the core punching sheet.

[0015] Preferably, the core punching sheet is provided with a plurality of weight reduction holes, and the weight reduction holes are uniformly distributed along the circumference of the core punching sheet.

[0016] In a second aspect, the application provides an electric motor using the rotor topology structure for high-speed electric motors of new energy vehicles as described above.

[0017] Compared with the prior art, the technical scheme of the application has at least the following beneficial technical effects:

[0018] 1. The rotor topology structure of the application designs the magnetic steel slot as a three-section structure comprising two first magnetic steel slots and one intermediate magnetic steel slot, has a large magnetic steel slot space, can accommodate more magnetic steels, and thus has a large peak torque. Four magnetic isolation bridges are formed between adjacent magnetic steel slots and between the magnetic steel slot and the outer edge of the core punching sheet, the number of magnetic isolation bridges is increased, stress concentration is avoided, the strength of the core punching sheet is improved, and the maximum speed of the electric motor is effectively improved. Therefore, the application can improve the maximum speed of the electric motor while having a large peak torque.

[0019] 2. The rotor topology structure of the application further provides an outer magnetic steel slot group cooperating with an inner magnetic steel slot group, fully utilizes the space on the magnetic poles, can set more magnetic steels to increase the peak torque of the electric motor, and disperses the stress concentration of a single magnetic bridge by increasing the magnetic bridges, so as to ensure that the core punching sheet has sufficient structural strength and improve the maximum speed of the electric motor.

[0020] 3. The electric motor using the rotor topology structure of the application can effectively improve the maximum speed of the electric motor while increasing the peak torque. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure schematic view of the rotor topology structure for high-speed electric motors of new energy vehicles provided by the application, wherein some magnetic poles are provided with magnetic steels.

[0022] Figure 2 The structure schematic view of a single magnetic pole in a rotor topology structure of a high-speed motor for a new energy automobile is provided for the embodiments of the utility model.

[0023] Mark explanation:

[0024] 1, core punching sheet; 11, magnetic pole; 12, intermediate magnetic steel slot; 13, first magnetic steel slot; 131, mounting area; 132, air gap area; 14, magnetic isolation bridge; 141, limit protrusion; 15, second magnetic steel slot; 151, mounting section; 152, air gap section; 16, air slot; 17, weight-reducing hole; 18, oil hole; 2, magnetic steel. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The drawings show embodiments of the present application. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] It can be understood that spatial relationship terms, such as "below", "under", "lower", "underneath", "on", "upper", and the like, can be used herein for describing the relationship between one element or feature and another element or feature as shown in the drawings. It should be understood that the spatial relationship terms are also inclusive of different orientations of the device in use and operation. For example, if the device in the drawings is turned over, the element or feature described as "below" or "under" or "underneath" the other element or feature would then be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "under" can include both orientations of above and below. In addition, the device can also include other orientations (such as rotated 90 degrees or other orientations), and the spatial description used herein is accordingly interpreted.

[0028] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through a central element. In the following embodiments, "connected" between the circuits, modules, units, etc. connected to each other, if there is transmission of electrical signals or data between them, it should be understood as "electrically connected", "communication connection" and the like.

[0029] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", or the like, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0030] Referring to Figure 1 and Figure 2 The embodiment of the present application provides a rotor topology for a high-speed motor of a new energy vehicle, comprising a core punching sheet 1, the core punching sheet 1 comprises a plurality of magnetic poles 11 distributed in the circumferential direction.

[0031] Referring to Figure 1 and Figure 2 The core punching sheet 1 is provided with a center hole, and the core punching sheet 1 is divided into an even number of sector regions in the circumferential direction, and each sector region is a magnetic pole 11. The magnetic pole 11 is a symmetrical structure with the plane in which the axis of the core punching sheet 1 is located as the symmetrical surface. In actual design, the number of magnetic poles 11 can be 6 poles, 8 poles, 12 poles, etc., and the design is carried out according to the actual motor product needs. In the embodiment, the number of magnetic poles 11 is 6 poles.

[0032] Referring to Figure 1 and Figure 2 The magnetic pole 11 is provided with an inner magnetic steel slot group, the inner magnetic steel slot group comprises a middle magnetic steel slot 12 and two first magnetic steel slots 13, the two first magnetic steel slots 13 are symmetrically distributed with the plane in which the axis of the core punching sheet 1 as the symmetrical surface, and the middle magnetic steel slot 12 is arranged between the two first magnetic steel slots 13.

[0033] The magnetic steel slot is designed as a three-section structure comprising two first magnetic steel slots 13 and one middle magnetic steel slot 12, has a larger magnetic steel slot space, can accommodate more magnetic steel 2, and thus has a larger peak torque. The two magnetic isolation bridges 14 formed between the adjacent magnetic steel slots, and the two magnetic isolation bridges 14 formed between the first magnetic steel slot 13 and the outer edge of the core punching sheet 1 increase the number of magnetic isolation bridges 14, and thus improve the strength of the core punching sheet 1, effectively improve the maximum speed of the motor. Therefore, the maximum speed of the motor can be improved while having a larger peak torque.

[0034] Referring to Figure 1 and Figure 2As shown, specifically, the symmetry plane of the two first magnetic steel grooves 13 on each magnetic pole 11 coincides with the symmetry plane of the magnetic pole 11. Moreover, the intermediate magnetic steel groove 12 is also designed in a symmetrical structure, and the symmetry plane coincides with the symmetry plane of the two first magnetic steel grooves 13. This arrangement makes the plurality of inner layer magnetic steel groove groups on the core punching sheet 1 uniformly spaced in the circumferential direction, so that the core punching sheet 1 has uniform strength.

[0035] Referring to Figure 1 and Figure 2 As shown, the first magnetic steel groove 13 has a first end and a second end at both ends. On each magnetic pole 11, the distance between the two first ends is greater than the distance between the two second ends. Moreover, on each first magnetic steel groove 13, the distance from the first end to the center of the core punching sheet 1 is greater than the distance from the second end to the center of the core punching sheet 1. That is, the two ends of the first magnetic steel groove 13 are spaced apart in the radial direction and the circumferential direction of the core punching sheet 1, so that the two first magnetic steel grooves 13 on each magnetic pole 11 are distributed in a V shape, the length of the first magnetic steel groove 13 is increased by fully utilizing the space on the magnetic pole 11, and more magnetic steel 2 can be arranged.

[0036] Referring to Figure 1 and Figure 2 As shown, the intermediate magnetic steel groove 12 is arranged between the two second ends, so that the two first magnetic steel grooves 13 and the intermediate magnetic steel groove 12 are arranged in a U shape, and there is enough space between the intermediate magnetic steel groove 12, the two first magnetic steel grooves 13 and the outer edge of the core punching sheet 1, which can be further arranged with other structures.

[0037] Through the above arrangement, a magnetic isolation bridge 14 is formed between the first end of the first magnetic steel groove 13 and the outer edge of the core punching sheet 1, and a magnetic isolation bridge 14 is formed between the second end of the first magnetic steel groove 13 and the intermediate magnetic steel groove 12. The entire inner layer magnetic steel groove group forms four magnetic isolation bridges 14 on the magnetic pole 11, the inner layer magnetic steel groove group can accommodate a larger number of magnetic steel 2, and the plurality of magnetic isolation bridges 14 can make the core punching sheet 1 have greater mechanical strength, thereby increasing the maximum speed of the motor while increasing the peak torque of the motor.

[0038] Referring to Figure 1 and Figure 2 As shown, further, in the magnetic isolation bridge 14 formed between the intermediate magnetic steel groove 12 and the first magnetic steel groove 13, the magnetic isolation bridge 14 partially protrudes into the intermediate magnetic steel groove 12 to form a limiting protrusion 141, and the two limiting protrusions 141 are used to install the magnetic steel 2. Specifically, the two limiting protrusions 141 serve as limiting structures, and when the magnetic steel 2 is installed in the intermediate magnetic steel groove 12, the magnetic steel 2 is limited and fixed by the two limiting protrusions 141, and the limiting protrusions 141 can further enhance the mechanical strength of the corresponding magnetic isolation bridge 14.

[0039] Referring to Figure 1 and Figure 2As shown, and when the magnetic steel 2 is installed in the middle magnetic steel slot 12, the limiting protrusion 141 forms a gap between the magnetic steel 2 and the magnetic isolation bridge 14, which serves as a magnetic isolation air cavity and plays a role of magnetic isolation and preventing demagnetization.

[0040] Referring to Figure 1 and Figure 2 As shown, further, the first magnetic steel slot 13 includes an installation area 131 for installing the magnetic steel 2 and air gap areas 132 located at both ends of the installation area 131. After the magnetic steel 2 is installed in the installation area 131, the air gap areas 132 at both ends also form magnetic isolation air cavities, which play a role of magnetic isolation and preventing demagnetization.

[0041] Referring to Figure 1 and Figure 2 As shown, further, the magnetic pole 11 is also provided with an outer magnetic steel slot group, and the outer magnetic steel slot group and the inner magnetic steel slot group are spaced apart along the radial direction of the core punching sheet 1 and close to the center of the core punching sheet 1. The outer magnetic steel slot group includes two second magnetic steel slots 15, and the two second magnetic steel slots 15 are symmetrically distributed with the symmetry plane of the two first magnetic steel slots 13 as the symmetry plane.

[0042] Referring to Figure 1 and Figure 2 As shown, specifically, the two ends of the second magnetic steel slot 15 are also spaced apart in the radial direction and the circumferential direction of the core punching sheet 1, so that the two second magnetic steel slots 15 on each magnetic pole 11 also form a V-shaped distribution. The outer magnetic steel slot group is arranged in the space between the middle magnetic steel slot 12, the two first magnetic steel slots 13 and the outer edge of the core punching sheet 1, which not only ensures the mechanical strength of the core punching sheet 1, but also further increases the number of magnetic steel slots, can accommodate more magnetic steels 2, to ensure the maximum speed of the motor, and further increase the peak torque of the motor.

[0043] Referring to Figure 1 and Figure 2 As shown, the magnetic isolation bridge 14 is also formed between the two second magnetic steel slots 15 and between the second magnetic steel slot 15 and the outer edge of the core punching sheet 1. The second magnetic steel slot 15 includes an installation section 151 for installing the magnetic steel 2 and an air gap section 152. The air gap section 152 of the second magnetic steel slot 15 is located at one end of the two second magnetic steel slots 15 away from each other. After the magnetic steel 2 is installed in the installation section 151 of the second magnetic steel slot 15, the air gap section 152 also forms a magnetic isolation air cavity, which plays a role of magnetic isolation and preventing demagnetization.

[0044] Referring to Figure 1 and Figure 2As shown, further, the outer edge of the core punching sheet 1 is provided with a plurality of air grooves 16, which are uniformly distributed circumferentially along the core punching sheet 1. Specifically, one air groove 16 is arranged between two adjacent magnetic poles 11, and the air grooves 16 between the two adjacent magnetic poles 11 are symmetrically distributed on the two adjacent magnetic poles 11. The arrangement of the air grooves 16 can adjust the air gap between the rotor and the stator, reduce the vibration of the rotor during the operation of the motor, and improve the NVH performance of the motor rotor.

[0045] In other embodiments, one air groove 16 can also be arranged on each magnetic pole 11. The air groove 16 can be located between two second magnetic steel grooves 15, or between the first magnetic steel groove 13 and the second magnetic steel groove 15 on the same side of the symmetry plane of the magnetic pole 11, and ensure that the plurality of air grooves 16 are uniformly spaced circumferentially along the core punching sheet 1.

[0046] Referring to Figure 1 and Figure 2 As shown, further, the core punching sheet 1 is also provided with a plurality of weight-reducing holes 17 and a plurality of oil passing holes 18. The plurality of weight-reducing holes 17 are uniformly distributed circumferentially along the core punching sheet 1, and the plurality of oil passing holes 18 are uniformly distributed circumferentially along the core punching sheet 1.

[0047] Referring to Figure 1 and Figure 2 Figure 1 Figure 2 Specifically, one weight-reducing hole 17 and one oil passing hole 18 are arranged between two adjacent magnetic poles 11. The weight-reducing hole 17 and the oil passing hole 18 are spaced apart in the radial direction of the core punching sheet 1 and away from the center of the core punching sheet 1. The weight-reducing holes 17 between the two adjacent magnetic poles 11 are symmetrically distributed on the two adjacent magnetic poles 11, and the oil passing holes 18 between the two adjacent magnetic poles 11 are symmetrically distributed on the two adjacent magnetic poles 11. The weight-reducing holes 17 reduce the weight of the core punching sheet 1, and the oil passing holes 18 provide a passage for cooling oil to flow through, thereby shortening the heat transfer path and improving the heat dissipation efficiency.

[0048] The present embodiment also provides a motor using the rotor topology structure for a high-speed motor of a new energy vehicle as described above.

[0049] Specifically, the number of magnetic poles 11 on the rotor core punching sheet 1 can be 6 poles, 8 poles, 12 poles, etc., which can be designed according to actual product needs. The width of the magnetic steel groove is consistent with the thickness of the corresponding magnetic steel 2 installed therein. In each magnetic pole 11, the thickness of the magnetic steel 2 installed in the inner layer magnetic steel groove group is consistent with or inconsistent with the thickness of the magnetic steel 2 installed in the outer layer magnetic steel groove group. In the inner layer magnetic steel groove group, the thickness of the magnetic steel 2 installed in the first magnetic steel groove 13 is consistent with or inconsistent with the thickness of the magnetic steel 2 installed in the middle magnetic steel groove 12. In each magnetic pole 11, the magnetic steel 2 can use the same magnetic steel brand, or two or more magnetic steel brands, forming a mixed magnetic steel 2. The number of motor slots includes but is not limited to 36 slots, 54 slots, 72 slots, etc.

[0050] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotor topology for a high-speed electric machine for a new energy vehicle, characterized in that: The iron core punching sheet (1) comprises a plurality of magnetic poles (11) distributed in the circumferential direction, and an inner layer magnetic steel slot group is arranged on the magnetic pole (11), the inner layer magnetic steel slot group comprises a middle magnetic steel slot (12) and two first magnetic steel slots (13), the two first magnetic steel slots (13) are symmetrically distributed with the plane where the axis of the iron core punching sheet (1) as the symmetry plane, and the middle magnetic steel slot (12) is arranged between the two first magnetic steel slots (13); A magnetic isolation bridge (14) is formed between the middle magnetic steel slot (12) and the first magnetic steel slot (13), the magnetic isolation bridge (14) partially protrudes into the middle magnetic steel slot (12) to form a limiting protrusion (141), and the magnetic steel (2) is arranged between the two limiting protrusions (141); When the magnetic steel (2) is arranged in the middle magnetic steel slot (12), the limiting protrusion (141) forms a gap between the magnetic steel (2) and the magnetic isolation bridge (14).

2. The rotor topology for high speed electric machines of new energy vehicles according to claim 1, characterized in that: An outer layer magnetic steel slot group is further arranged on the magnetic pole (11), the outer layer magnetic steel slot group and the inner layer magnetic steel slot group are spaced apart in the radial direction of the iron core punching sheet (1) and close to the center of the iron core punching sheet (1), and the outer layer magnetic steel slot group comprises two second magnetic steel slots (15), the two second magnetic steel slots (15) are symmetrically distributed, and the symmetry plane coincides with the symmetry plane of the two first magnetic steel slots (13).

3. The rotor topology for high speed electric machines of new energy vehicles according to claim 1, characterized in that: The middle magnetic steel slot (12) has a symmetrical structure, and the symmetry plane coincides with the symmetry plane of the two first magnetic steel slots (13).

4. The rotor topology for high speed electric machines of new energy vehicles according to claim 1, characterized in that: The first magnetic steel slot (13) comprises a first end and a second end, the distance between the two first ends is greater than the distance between the two second ends, and the middle magnetic steel slot (12) is arranged between the two second ends.

5. The rotor topology for high speed electric machines of new energy vehicles according to claim 1, characterized in that: The first magnetic steel slot (13) comprises a mounting area (131) and an air gap area (132) located at both ends of the mounting area (131), and the mounting area (131) is used for mounting the magnetic steel (2).

6. The rotor topology for high speed electric machines of new energy vehicles according to claim 1, characterized in that: An outer edge of the iron core punching sheet (1) is provided with a plurality of air grooves (16), and the plurality of air grooves (16) are uniformly distributed in the circumferential direction of the iron core punching sheet (1).

7. The rotor topology for high speed electric machines of new energy vehicles according to claim 1, characterized in that: A plurality of weight reduction holes (17) are arranged on the iron core punching sheet (1), and the plurality of weight reduction holes (17) are uniformly distributed in the circumferential direction of the iron core punching sheet (1).

8. An electric machine characterized by: The rotor topology structure for the high-speed motor of the new energy vehicle is used.

Images