Magnetic flux switching permanent magnet motor structure for inhibiting demagnetization of permanent magnet

Abstract

The invention provides the magnetic flux switching permanent magnet motor structure for inhibiting demagnetization of a permanent magnet. The magnetic flux switching permanent magnet motor structure comprises a stator and a rotor, the rotor is composed of a rotating shaft and a rotor iron core, and the stator is composed of a stator iron core, a permanent magnet and an armature winding. The stator iron core is composed of U-shaped silicon steel sheet iron core units. The length of the permanent magnet is reduced compared with that of a permanent magnet of a traditional magnetic flux switching permanent magnet motor, the widths at the two sides (close to the air gap side and the machine shell side) of the permanent magnet are reduced, the permanent magnet is closely spliced between the two iron core units, and the rotor iron core is of a salient pole structure. According to the magnetic flux switching permanent magnet motor structure for inhibiting the local irreversible demagnetization of the permanent magnet, the irreversible demagnetization risk of the permanent magnet under the two conditions of no load and load in the magnetic flux switching permanent magnet motor is reduced, the permanent magnet consumption is reduced, the permanent magnet utilization rate is improved, and the output torque of the motor is maintained while the manufacturing cost of the motor is saved.

Description

technical field [0001] The invention relates to the technical field of flux switching permanent magnet motors, in particular to a flux switching permanent magnet motor structure for suppressing demagnetization of permanent magnets. 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] Most traditional permanent magnet motors use surface mount, plug-in or embedded technology to fix the permanent magnets on the rotor. In this way, during the operation of the moto...

AI Technical Summary

Problems solved by technology

[0004] However, traditional permanent magnet motors have the following problems: ① the output torque and output power of the motor decrease; ② the load air gap flux density waveform is distorted, the torque fluctuation increases, and the vibration noise of the motor Large; ③ The utilization rate of permanent magnets is reduced

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