Multi-gear fault-tolerance permanent magnetism magnetic flux switching electric machine and fault-tolerance method thereof

Abstract

The invention discloses a multi-gear fault-tolerance permanent magnetism magnetic flux switching electric machine and a fault-tolerance method thereof, belonging to a permanent magnetism fault-tolerance electric machine and a method. The electric machine comprises a salient pole stator, an armature winding and a salient pole rotor. Stator salient poles are E-shaped stator iron blocks; bar-shaped permanent magnets are embedded into a gap between every two E-shaped stator iron blocks in sequence; and stator windings which are coils from a first coil to a sixth coil are wounded on two E-shaped arms connected with the bar-shaped permanent magnets. Since the method employs the multitooth fault-tolerance permanent magnetism magnetic flux switching electric machine, the self inductance of the armature winding is increased; when the multi-gear fault-tolerance permanent magnetism magnetic flux switching electric machine uses high-coercive force permanent magnets, the short circuit current if can be restrained within the rated current iL without considerably increasing the number of turns of the armature winding. The invention has high reliability; the armature magnetic field makes small impact on the permanent magnets; the multi-gear structures of the stator and the rotor of the electric machine enable the electric machine to have small mutual inductance, strong magnetism isolating capability, big electrical inductance, strong capability of restraining the short circuit current and reduced location torque.

Description

technical field [0001] The invention relates to a fault-tolerant motor and a method thereof, in particular to a multi-tooth fault-tolerant permanent magnet flux switching motor and a fault-tolerant method thereof, belonging to the field of permanent magnet fault-tolerant motors. Background technique [0002] The starter / generator should have the advantages of simple structure, reliable operation, high efficiency and safe use. From the perspective of the type of starter generator, there is no permanent magnet on the rotor, no winding, and it has a simple structure, firmness, low cost, reliable operation, flexible control, high operating efficiency, strong fault tolerance, and high temperature and high speed adaptability. Resistance motors are very competitive in this field, and have been the main research object in this field in the United States since the late 1980s. The University of Kentucky, GE, and Sundstrand have conducted a lot of research and testing on switched relu...

AI Technical Summary

Problems solved by technology

To make the short-circuit current i f Less than the rated current, the permanent magnet remanence must be greatly reduced and the number of winding turns must be increased, resulting in lower power density and efficiency of the motor

Images