Stator permanent magnet vernier motor with modules evenly distributed at circumference

Abstract

The invention discloses a stator permanent magnet vernier motor with modules evenly distributed at the circumference. The stator permanent magnet vernier motor comprises an inner stator and an outer rotor. The multiple unit modules which are distributed along the circumference of an air gap are fixed to the outer ring of the inner stator. The side walls of every two adjacent unit modules are tightly attached together. Each unit module is composed of a permanent magnet and a magnetizer which are the same in size, wherein the side wall of the permanent magnet and the side wall of the magnetizer are tightly attached together. The permanent magnets are magnetized in a radial mode. The number P of pole-pairs of magnetic field distribution produced by the permanent magnets corresponds to the number of the unit modules and the number of rotor teeth. The magnetizer in each unit module can be replaced by another identical permanent magnet, and after replacement, the two permanent magnets in the same unit module are opposite in magnetizing direction. Due to the mutual cooperation of the unit modules, the limited notch space, near the stator, of the air gap is reasonably utilized, flux density in a magnetic circuit is increased effectively, counter potential in a winding is effectively improved, output torque and power density of the motor are improved, and the size is reduced correspondingly.

Description

technical field [0001] The invention relates to a motor or generator with high power density, which belongs to the field of permanent magnet motors, in particular to permanent magnet vernier motors. Background technique [0002] The vernier motor has the characteristics of low speed and high torque, so it has good application scenarios in many occasions such as rail transit, ship propulsion, food processing and electric vehicles. At present, the permanent magnet vernier motor is mostly researched on the rotor permanent magnet motor. The permanent magnet of the rotor permanent magnet motor is placed on the rotor, which brings certain difficulties to the cooling of the motor, and the temperature is too high. It will affect the stability of the motor. Running, especially when the motor is running overheating, the temperature of the motor rises sharply. When the temperature exceeds the Curie temperature of the permanent magnet, it will cause the permanent magnet to lose its magn...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of serious flux leakage in the original stator permanent magnet vernier motor, small magnetic density in the air gap, and small back EMF in the stator winding, which lead to low power density of the motor, and propose a circumferentially evenly distributed The stator permanent magnet vernier motor of the module can increase the air gap magnetic flux density, increase the counter electromotive force, and increase the output torque and power density

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