A stator/rotor permanent magnet variable flux axial flux switching permanent magnet generator

Abstract

The invention discloses a stator / rotor permanent magnetic type magnetic-flux-variable axial magnetic flux switching permanent magnetic generator. The generator comprises a first rotor, a first stator,a second rotor, a second stator and a third rotor which are installed coaxially in order, the first rotor and the third rotor are symmetric by taking the second rotor as the center, the first statorand the second stator are symmetric by taking the second rotor as the center, and each of the rotors and stators is of a salient pole structure. An aluminum-nickel-cobalt permanent magnet is low in acoercive force, so that different pulse currents are applied to change the magnetization magnitude and direction of the aluminum-nickel-cobalt permanent magnet, the magnetization level of the permanent magnet can be changed and memorized, and an air gap magnetic field of a motor can be controlled flexibly by adjusting the directions and magnitudes of the pulse currents. In addition, a pulse winding only applies a magnetizing / demagnetizing current in a very short time, there is nearly no exciting copper loss, and the problem that the power or torque density of an existing axial variable magnetic flux switching permanent magnetic generator is not high enough is solved.

Description

technical field [0001] The invention belongs to the technical field of variable flux permanent magnet synchronous motors, in particular to a stator / rotor permanent magnet variable flux axial flux switching permanent magnet generator. Background technique [0002] In recent years, permanent magnet synchronous generators have been widely used in wind power generation. The permanent magnet synchronous generator is excited by permanent magnets, and has the characteristics of simple structure and high power generation efficiency. By controlling the full power converter, the permanent magnet synchronous generator can perform variable speed operation with the change of wind speed to achieve maximum wind energy capture. However, due to the very stable performance of permanent magnets in permanent magnet synchronous generators, the air gap flux is difficult to adjust, which limits the range of generator speed adjustment. Therefore, according to the wind speed, gears are often used t...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a stator / rotor permanent magnet type variable flux axial flux switching permanent magnet generator, which solves the problem that the power / torque density of the existing axial variable magnetic flux switching permanent magnet generator is not high enough question

Images