Single-winding non-bearing magnetic flux switching permanent magnetic motor

Abstract

The invention belongs to the technical field of a motor, and relates to a single-winding non-bearing magnetic flux switching permanent magnetic motor. The single-winding non-bearing magnetic flux switching permanent magnetic motor comprises a stator iron core, a rotator iron core, permanent magnets embedded in the middle of stator teeth, and concentrated windings. A stator and a rotor are both of double-salient pole structures. The single-winding non-bearing magnetic flux switching permanent magnetic motor is characterized in that the stator iron core is composed of six U-shaped laminations; a permanent magnet capable of tangential alternative magnetizing is embedded between every two laminations so that a stator tooth which is axisymmetric is formed; the stator teeth are provided with the concentrated windings, the end portions of the windings are quite small, and the windings, which are opposite to each other in terms of space, on two stator teeth form a phase so that a three-phase winding is formed; and the excitation of winding currents is of a radial excitation mode, each winding is independently controlled, the winding currents can perform bidirectional flow in positive and negative directions, the current size can be controlled according to needs, and the currents has the same phase as a back electromotive force. The single-winding non-bearing magnetic flux switching permanent magnetic motor has the advantages of high speed, large power, high efficiency, high power density, high operation stability, high reliability, and adaptability to an AC operation mode.

Description

Technical field [0001] The invention belongs to the technical field of high-speed bearingless motors, and relates to a stator permanent magnet single winding bearingless flux switching permanent magnet motor Background technique [0002] High-speed and ultra-high-speed motors are widely used in high-speed machine tools, turbomolecular pumps, high-speed flywheels and other equipment. When supported by mechanical bearings, the frictional resistance caused by the high-speed operation of the rotor increases, which aggravates the wear of the bearings and causes uneven air gaps in the motor. , Winding heating, not only reduces the working efficiency of the motor, shortens the service life of the motor and bearings, but also increases the burden on the maintenance of the motor and bearings. [0003] The proposal of the magnetic bearing motor solves the wear problem of the mechanical bearing, but the magnetic bearing occupies an independent axial space, which makes the axial utiliza...

AI Technical Summary

Problems solved by technology

This increases the losses in the motor, reducing its efficiency

At the same time, its half-cycle energization mode reduces the utilization rate of the winding and the power density of the motor

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