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Hybrid permanent magnet rotor for electric vehicles

An electric vehicle, hybrid permanent magnet technology, applied in electric vehicles, electric components, magnetic circuits, etc., can solve the problems of unfavorable motor efficiency and stability, excessive cogging torque torque ripple, etc., and save rare earth permanent magnets. The effect of low dosage, low core loss and high sine

Active Publication Date: 2019-01-25
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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  • Hybrid permanent magnet rotor for electric vehicles
  • Hybrid permanent magnet rotor for electric vehicles
  • Hybrid permanent magnet rotor for electric vehicles

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Embodiment Construction

[0026] specific implementation plan

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

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

[0029] There are X number of first permanent magnets, second permanent magnets and third permanent magnets all of which are planar magnetic steel and embedded in the rotor core, and X is an even number; The radial 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 is against th...

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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, which belongs to the technical field of automobile motors. Background technique [0002] The problem of energy shortage in today's society is becoming increasingly prominent, and the voice and requirements of the whole society for energy saving and environmental protection of new energy vehicles are increasing day by day. As a representative of new energy vehicles, electric vehicles have gradually become the main direction of development. Drive motor is one of the key technologies to be studied in electric vehicles. How to make electric vehicle motors run more energy-efficient and efficient has become a topic of common discussion in the field of automotive motors. There is no excitation loss in permanent magnet synchronous motors, and the efficiency will be higher, so permanent magnet synchronous motors are gradually becoming the mainstream of automotive drive motors. [...

Claims

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Application Information

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Patent Type & Authority Applications(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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