Rotor punching sheet, rotor iron core comprising rotor punching sheet, motor and new energy vehicle type driving motor

Abstract

The utility model discloses a rotor punching sheet, which comprises a shaft hole and a plurality of magnet groove groups arranged around the circumferential direction of the shaft hole at intervals, each magnet groove group is provided with two magnetic steel grooves which are arranged in a V shape, and the opening faces the outer contour of the rotor punching sheet. The utility model also discloses a rotor iron core comprising the rotor punching sheet, a motor and a new energy vehicle type driving motor.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a rotor punching sheet, a rotor core having the rotor punching sheet, a motor having the rotor core, and a new energy vehicle driving motor. Background Art

[0002] In the prior art, the magnets on the rotor punchings of the motor are arranged in a straight line, the difference in inductance between the d-axis and the q-axis is small, and the resulting reluctance torque is small, which is not conducive to maximizing the utilization of the reluctance torque.

[0003] For example, in the prior art of a rotor punching with the publication number CN107591911A, the magnets are arranged in a straight line, which generates a relatively small reluctance torque and is not conducive to maximizing the utilization of the reluctance torque.

[0004] Therefore, how to maximize the use of reluctance torque is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] In order to solve the above technical problems, the utility model provides a plurality of magnet slot groups including an axial hole and circumferentially spaced around the axial hole, each of the magnet slot groups has two magnetic steel slots arranged in a "V" shape, with the opening facing the outer contour of the rotor punching.

[0006] Furthermore, weight-reducing holes spaced apart along the circumference are provided between the magnet slot groups and the shaft hole. The weight-reducing holes are arranged in a triangular shape, and one vertex of the weight-reducing hole faces the gap between two adjacent magnet slot groups.

[0007] Furthermore, there are 8 magnet slot groups and 8 weight-reducing holes.

[0008] Furthermore, through holes are arranged circumferentially between the weight-reducing holes and the magnet slot groups.

[0009] The present invention further provides a rotor core having the rotor punching sheets.

[0010] The present invention further provides a motor having the rotor core.

[0011] The present invention further proposes a new energy vehicle drive motor having a rotor core.

[0012] Beneficial effects

[0013] By designing the magnet in a "V" shape, the q-axis inductance can be increased, thereby increasing the inductance difference between the d-axis and q-axis directions, maximizing the use of magnetic resistance torque, reducing the use of permanent magnets, and improving the power density of the motor.

[0014] In the case of a motor with the same power, the amount of permanent magnets used can be reduced, thereby reducing the volume and cost, achieving the goal of lightweight design. At the same time, the power density of the product can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 , a schematic diagram of a rotor punching structure. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the following examples. The following examples will help those skilled in the art further understand the present invention, but are not intended to limit the present invention in any way. It should be noted that those skilled in the art may make various adjustments and improvements without departing from the scope of the present invention. These modifications and improvements are all within the scope of protection of the present invention.

[0017] Example 1

[0018] like Figure 1 As shown, the utility model discloses a rotor punching, comprising an axial hole 1 and a plurality of magnet slot groups 2 circumferentially spaced around the axial hole 1, characterized in that each of the magnet slot groups has two magnetic steel slots 201 arranged in a "V" shape, with the opening facing the outer contour of the rotor punching.

[0019] By designing the magnet in a "V" shape, the q-axis inductance can be increased, thereby increasing the inductance difference between the d-axis and q-axis directions, maximizing the use of magnetic resistance torque, reducing the use of permanent magnets, and improving the power density of the motor.

[0020] In the case of a motor with the same power, the amount of permanent magnets used can be reduced, thereby reducing the volume and cost, achieving the goal of lightweight design. At the same time, the power density of the product can be increased.

[0021] Preferably, weight-reducing holes 3 spaced apart along the circumference are provided between the magnet slot groups 2 and the shaft hole 1 . The weight-reducing holes 3 are arranged in a triangular shape, and one vertex of the weight-reducing hole 3 faces the gap between two adjacent magnet slot groups 2 .

[0022] One vertex corner of the weight-reducing hole faces the gap between two adjacent magnet slot groups, which can minimize material usage while ensuring the stability of the structure.

[0023] Preferably, there are 8 magnet slot groups 2 and 8 weight-reducing holes 3 .

[0024] Example 2

[0025] Preferably, through holes are provided circumferentially between the weight-reducing holes 3 and the magnet slot groups 2 .

[0026] These through-holes not only help further reduce the weight of the rotor laminations, but also improve heat dissipation performance, ensuring that the motor can maintain a stable temperature during long-term operation.

[0027] Example 3

[0028] The rotor core according to the embodiment of the present invention includes the rotor punching according to the embodiment of the present invention.

[0029] The motor according to the embodiment of the present invention includes the rotor core according to the embodiment of the present invention.

[0030] The rotor core is manufactured using rotor punchings according to the embodiments of the present invention. The rotor core carries the magnets and rotor punchings and is connected to the motor's main shaft via an axial hole. During the manufacturing process, multiple rotor punchings can be stacked and pressed together to form a complete rotor core.

[0031] Example 4

[0032] A drive motor for a new energy vehicle according to an embodiment of the present invention includes a rotor core according to an embodiment of the present invention. The rotor core and motor according to an embodiment of the present invention can be used in a drive motor for a new energy vehicle. They meet the performance requirements of new energy vehicles for drive motors, including high power, high efficiency, and low noise.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A rotor punching, comprising an axial hole (1) and a plurality of magnet slot groups (2) arranged at intervals in the circumferential direction around the axial hole (1), characterized in that: Each magnet slot group has two magnetic steel slots (201) arranged in a "V" shape, with openings facing the outer contour of the rotor punching.

2. A rotor punching according to claim 1, characterized in that: Lightening holes (3) spaced apart along the circumference are provided between the magnet slot groups (2) and the shaft hole (1); the lightening holes (3) are arranged in a triangular shape, with one vertex of the lightening hole (3) facing the gap between two adjacent magnet slot groups (2).

3. A rotor punching according to claim 2, characterized in that: There are eight magnet slot groups (2) and eight weight-reducing holes (3).

4. A rotor punching according to claim 2, characterized in that: Through holes are provided at intervals in the circumferential direction between the weight-reducing holes (3) and the magnet slot groups (2).

5. A rotor core, characterized in that: The invention comprises a rotor punching according to any one of claims 1 to 4.

6. A motor, characterized in that: The rotor core according to claim 5 is included.

7. A new energy vehicle driving motor, characterized in that: The rotor core according to claim 5 is included.

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