A self-starting permanent magnet synchronous motor with magnetic and conductive composite tooth structure

Abstract

The invention discloses a self-starting permanent magnet synchronous motor of a magnetism and electricity conducting composite tooth structure. A rotor of the self-starting permanent magnet synchronous motor comprises a rotor core, multiple cage strips, multiple permanent magnets, a magnetism insulating ring and a rotation shaft. Composite teeth are formed at the tops of rotor core teeth with magnetism and electricity conducting composite materials. The rest of the core forms a rotor laminated core in an overlying mode with a silicon steel sheet. The composite tooth structure is tightly connected with the outer surface of the rotor laminated core. The permanent magnets are evenly distributed in the rotor laminated core with a built-in tangential magnetic structure. The magnetism insulating ring is arranged between the permanent magnets and the rotation shaft. The rotation shaft is sleeved with the annular magnetism insulating ring. The cage strips of the rotor are identical with cage strips of an opened groove of an ordinary rotor in terms of structure. The composite materials on the tops of the teeth are strong in eddy current effect, large in torque, little in rotation speed fluctuation, capable of assisting starting of the motor, capable of further optimizing the sizes of the composite materials and capable of effectively improving the efficiency of the motor.

Description

technical field

[0001] The invention relates to the technical field of self-starting permanent magnet synchronous motors, in particular to a self-starting permanent magnet synchronous motor with a magnetic-conductive and conductive composite tooth structure. Background technique

[0002] AC asynchronous motor has small power factor and relatively low efficiency, and permanent magnet motor can overcome this shortcoming, but permanent magnet motor has the characteristics of difficulty in starting. For this reason, people have studied self-starting permanent magnet synchronous motor, because it satisfies both It meets the starting requirements and solves the shortcomings of low power factor and low efficiency during stable operation. However, in some occasions where the motor starts frequently or the motor load changes frequently, the starting torque and starting current of the motor have attracted much attention. In these occasions, the small starting torque will cause long s...

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