Low-cogging-torque flux switching permanent magnet motor

Abstract

The invention discloses a low-cogging-torque flux switching permanent magnet motor which comprises a stator of a salient pole structure and a rotor of an embedded structure. The stator is provided with 6n U-shaped stator magnetic-conducting iron cores. Adjacent side edges of every two adjacent U-shaped stator magnetic-conducting iron cores form one stator tooth. A permanent magnet is embedded in each stator tooth. The permanent magnets are magnetized in the tangential direction, and the magnetizing directions of every two adjacent permanent magnets are opposite. The rotor of the embedded structure comprises 5n embedded U-shaped rotor magnetic-conducting iron cores, a rotor block and a rotor shaft, wherein the rotor block and the rotor shaft are made of non-magnetic-conducting materials, the embedded U-shaped rotor magnetic-conducting iron cores are embedded in the rotor block, adjacent side edges of every two adjacent embedded U-shaped rotor magnetic-conducting iron cores form one rotor electrode, and n is a positive integer. The rotor of the embedded structure of the motor has the advantages of being easy to manufacture, solid and durable. The number of used silicon steel sheets is reduced, it is guaranteed that the motor outputs average output torque, and the cogging torque and the torque pulsation of the motor are effectively lowered at the same time.

Description

technical field [0001] The invention relates to a motor, in particular to a torque flux switching permanent magnet motor. Background technique [0002] With global warming, shortage of fossil fuels and environmental pollution, how to use energy more efficiently has become a problem that must be faced in the process of human development. Permanent magnet synchronous motors have the advantages of small size, high power density, high efficiency, high output torque and reliable operation, and have been widely used in many fields, especially in the automotive industry. Permanent magnet synchronous motors are used in new energy played an important role in the development of automobiles. [0003] The flux switching permanent magnet motor belongs to a permanent magnet synchronous motor. Its basic structure is similar to that of a switched reluctance motor, which is a doubly salient pole structure, but with radially magnetized permanent magnets embedded in each stator tooth. The m...

AI Technical Summary

Problems solved by technology

Studies have shown that an obvious disadvantage of flux switching permanent magnet motors compared with other permanent magnet motors is that the cogging torque is too large, which is a major factor affecting the torque ripple of the motor

Generally, methods such as rotor virtual slots and rotor flanges are used to reduce the cogging torque of flux switching permanent magnet motors, but this will reduce the induced potential of the motor and increase the processing difficulty of the motor.

Images