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Permanent magnet motor rotor for automobile

A technology for permanent magnet motors and rotors, which is applied to the rotating parts of the magnetic circuit and the shape/style/structure of the magnetic circuit. Effects of reducing system cost, increasing reluctance torque, and increasing power density

Pending Publication Date: 2020-04-24
WANXIANG
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing technical solutions, the rotor of permanent magnet motors for automobiles generally adopts a type I or V-type topology structure. By increasing the saliency rate, the reluctance torque is increased, and the power density is increased; the existing motor saliency can be improved to a certain extent rate, increase the reluctance torque, but in the process of high-speed operation, the rotor magnetic bridge is easily broken by the centrifugal force, which is easy to cause the risk of failure
At the same time, because the direct-axis magnetic circuit is easy to saturate, the risk of demagnetization of the magnetic steel increases

Method used

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  • Permanent magnet motor rotor for automobile
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Embodiment

[0016] like figure 1 , 2 As shown, the present invention provides a double-layer V-shaped rotor topology, including rotor core 1, upper magnetic steel slot 2, upper magnetic steel 3, upper auxiliary magnetic bridge 4, lower magnetic steel slot 5, lower magnetic steel Steel 6, lower auxiliary magnetic bridge 7, auxiliary air slot 8; on the basis of the traditional V-shaped topological structure, a double-layer V-shaped topological structure is derived. At the same time, in order to ensure the structural strength of the rotor under high-speed conditions and reduce the risk of demagnetization, the scheme optimizes the single magnetic bridge structure in the V-shaped structure of the lower layer to a parallel parallel magnetic bridge structure, and optimizes the size of the auxiliary air slot between the double bridges. Excellent design. Compared with the traditional single-V topology, the weight of each magnetic pole of the double-V topology is larger, which puts forward higher...

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Abstract

The invention provides a permanent magnet motor rotor for an automobile. The salient pole rate of a motor is further increased through a double-V-shaped topological structure, so the reluctance torqueand the power density of the motor are greatly increased; and the design of double parallel magnetic bridges improves the strength of the rotor, ensures the safety of the motor, and reduces the demagnetization risk of the motor. The permanent magnet motor rotor for the automobile adopts the double-layer V-shaped topological structure. The double-V-shaped rotor topological structure and the designof the parallel auxiliary magnetic bridges ensure the safety of the motor rotor structure and improve the power density of the motor.

Description

technical field [0001] The invention relates to the field of automobile motors, in particular to a permanent magnet motor rotor for automobiles. Background technique [0002] In the existing technical solutions, the rotor of permanent magnet motors for automobiles generally adopts a type I or V-type topology structure. By increasing the saliency rate, the reluctance torque is increased, and the power density is increased; the existing motor saliency can be improved to a certain extent The rate increases the reluctance torque, but in the process of high-speed operation, the rotor magnetic bridge is easily broken by the centrifugal force, and it is easy to cause the risk of failure. At the same time, since the direct-axis magnetic circuit is easy to saturate, the risk of demagnetization of the magnetic steel increases. Contents of the invention [0003] The purpose of the present invention is to further increase the salient pole ratio of the motor through the double-V topol...

Claims

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Application Information

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IPC IPC(8): H02K1/27
CPCH02K1/27
Inventor 李洋洋陈江冯舜
Owner WANXIANG
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