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Mixed material permanent magnet motor rotor structure with high salient pole ratio

A hybrid material and permanent magnet motor technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit rotating parts, magnetic circuit, etc., can solve the problem of high motor cost, improve magnetic permeability, alleviate saturation, improve Effect of Torque Density

Pending Publication Date: 2021-11-19
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional way to increase the torque density of the motor is to replace the high-performance rotor plate, but this method leads to high cost of the motor

Method used

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  • Mixed material permanent magnet motor rotor structure with high salient pole ratio
  • Mixed material permanent magnet motor rotor structure with high salient pole ratio
  • Mixed material permanent magnet motor rotor structure with high salient pole ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 and figure 2 As shown, the permanent magnet motor rotor structure of the mixed material high saliency ratio of the present embodiment includes a mixed material rotor 1, and a plurality of pairs of permanent magnet slots 2 are arranged on the mixed material rotor 1, and permanent magnets are arranged in each permanent magnet slot 2 3. The permanent magnets 3 in two adjacent pairs of permanent magnet slots 2 have an axisymmetric structure, and the symmetric axis is set as the q-axis, and a magnetic conduction hole 4 is provided between two adjacent pairs of permanent magnet slots 2 and on the q-axis. A high magnetic permeability body 5 is arranged inside the magnetic permeable hole 4, and the high magnetic permeability body 5 is symmetrical about q.

[0025] The magnetic field emitted by the permanent magnet 3 enters the stator through the air gap through the rotor, and then returns to the permanent magnet 3 of the rotor through the air gap to form a compl...

Embodiment 2

[0033] like image 3 As shown, the difference between the permanent magnet motor rotor structure of the mixed material high saliency ratio of the present embodiment and the embodiment 1 is only:

[0034] In this embodiment, the magnetic permeable hole 4 is a square hole, preferably a rectangular hole, and the corresponding high magnetic permeability body 5 is arranged as a square.

[0035] The rest are consistent with Embodiment 1 and will not be repeated here.

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Abstract

The invention discloses a mixed material permanent magnet motor rotor structure with a high salient pole ratio. The structure comprises a mixed material rotor, the mixed material rotor is provided with a plurality of pairs of permanent magnet grooves, each permanent magnet groove is internally provided with a permanent magnet, the permanent magnets in two adjacent pairs of permanent magnet grooves are of an axial symmetry structure by taking the q axis as the symmetry axis, a magnetic conductive hole is arranged between two adjacent pairs of permanent magnet grooves and on the q axis, and a high magnetic conductivity body is arranged in the magnetic conductive hole and is symmetrical about the q axis. The magnetic conductive holes are additionally formed in the corresponding positions of the q axis, and the high-magnetic-conductivity bodies with high magnetic conductivity are filled in the magnetic conductive holes, so that the saturation degree of a q-axis magnetic circuit is relieved, the magnetic conductivity is improved, the salient pole ratio of the motor is improved to ensure larger torque output, and the torque density of the built-in permanent magnet motor is improved to a certain extent.

Description

technical field [0001] The invention relates to a permanent magnet motor, in particular to a permanent magnet motor rotor structure with mixed materials and high salient pole ratio. Background technique [0002] In recent years, with the rapid development of new energy vehicles, the requirements for the driving motor indicators on the vehicle are getting higher and higher, and the permanent magnet motor with high torque density has become a hot research object. For the built-in permanent magnet motor, the rotor structure Determines the torque density of the motor. Since the output torque of the interior permanent magnet motor is closely related to the rotor salient pole ratio, how to improve the output torque of the motor by changing the rotor structure and increasing the rotor salient pole ratio has become a key point in the design of the rotor structure. The traditional way to improve the torque density of the motor is to replace the high-performance rotor plate, but this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/274
Inventor 韦强李伟业符敏利彭俊王禹杨慧强何明杰郝玉涛侯聚微
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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