A hybrid permanent magnet rotor for electric vehicles

A hybrid permanent magnet and electric vehicle technology, applied in electric vehicles, electric components, motors, etc., can solve the problems of excessive cogging torque, torque ripple, unfavorable motor efficiency and stability, etc., and achieve low core loss and energy saving The effect of rare earth permanent magnet dosage and high output power

Active Publication Date: 2020-12-01
SHANDONG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0005] At present, the permanent magnet arrangement of most permanent magnet synchronous motor rotors adopts built-in "one" shape, "V" shape and "U" shape. Although these permanent magnet arrangement methods can use reluctance torque, they also have cogging Unfavorable factors such as excessive torque, excessive torque ripple, and air gap flux density are easily affected by armature reaction, which are not conducive to improving the efficiency and stability of the motor

Method used

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  • A hybrid permanent magnet rotor for electric vehicles
  • A hybrid permanent magnet rotor for electric vehicles
  • A hybrid permanent magnet rotor for electric vehicles

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Embodiment Construction

[0026] specific implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] like figure 1 Shown is a diagram of a hybrid permanent magnet rotor for an electric vehicle of the present invention. The shown rotor includes a first permanent magnet, a second permanent magnet, a third permanent magnet, a non-magnetically conductive fixed core, a rotor iron core and a tightening ring. The rotor is an inner rotor structure, and the rotor iron core is fixed on the periphery of the non-magnetically conductive fixed core.

[0029] There are X first permanent magnets, second permanent magnets and third permanent magnets embedded in the rotor core, all of which are plane magnetic steels, and X is an even number; The radial included angle is greater than 20° and less than 45°.

[0030] The length of the first permanent magnet is shorter than that of the second permanent magnet; one end of the first permanent magnet i...

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Abstract

The invention provides a hybrid permanent magnet rotor for an electric vehicle, belonging to the technical field of electric vehicle motors. The rotor is an inner rotor structure, comprising a first permanent magnet, a second permanent magnet, a third permanent magnet, a non-magnetic conductive fixed core, a rotor iron core and a tightening ring, and the rotor iron core is fixed on the periphery of the non-magnetic conductive fixed core; The first permanent magnet, the second permanent magnet and the third permanent magnet are the same in number and even in number, and are combined into a shape. The outer side of the rotor is provided with a tightening ring to prevent deformation of the rotor. Compared with the existing permanent magnet synchronous motor rotor, it saves part of the scarcerare earth permanent magnet, has higher magnetic field strength, higher mechanical strength, effective use of reluctance torque, and higher output power.

Description

technical field [0001] The invention relates to a hybrid permanent magnet rotor for electric vehicles, belonging to the technical field of automobile motors. Background technique [0002] The problem of energy shortage in today's society is becoming more and more prominent, and the voices and requirements of the whole society for energy saving and environmental protection of new energy vehicles are increasing day by day. As the representative of new energy vehicles, electric vehicles have gradually become the main direction of development. The drive motor is one of the key technologies to be studied in electric vehicles. How to make the electric vehicle motor run more energy-efficiently and efficiently has become a topic of discussion in the field of automotive motors. Permanent magnet synchronous motor does not have excitation loss, and the efficiency will be higher, so permanent magnet synchronous motor is gradually becoming the mainstream of automobile drive motors. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27
CPCH02K1/276Y02T10/64
Inventor 史立伟张文超安俊豪王福杰马清芝其他发明人请求不公开姓名
Owner SHANDONG UNIV OF TECH
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