Rotor structure of permanent magnet auxiliary type bearingless synchronous reluctance motor

Abstract

The invention discloses a rotor structure of a permanent magnet auxiliary type bearingless synchronous reluctance motor. Four groups of magnetic barriers are uniformly and symmetrically arranged on the rotor structure in the circumferential direction; each group of magnetic barriers is divided into an inner layer, a middle layer and an outer layer from inside to outside; each layer of magnetic barrier comprises a rectangular permanent magnet mounting groove, two magnetic isolation bridges which are symmetrically distributed relative to the center line of the diameter direction of the permanentmagnet mounting groove, and two rib parts which are arranged between the permanent magnet mounting groove and the magnetic isolation bridges; a permanent magnet is fixedly embedded into the permanentmagnet mounting groove in each layer of magnetic barrier; the radial contour line of each magnetism isolating bridge comprises a magnetism isolating bridge outer boundary line, a magnetism isolatingbridge inner boundary line and a magnetism isolating bridge end part; and the two ends of the end of the magnetic isolation bridge are connected with the outer boundary line of the magnetic isolationbridge and the inner boundary line of the magnetic isolation bridge respectively, the outer boundary line of the magnetic isolation bridge, the inner boundary line of the magnetic isolation bridge andthe middle line of the magnetic isolation bridge are quadratic function curve segments, the end of the magnetic isolation bridge is composed of two Bezier cubic curves, and torque and suspension force pulsation are effectively reduced.

Description

technical field [0001] The invention belongs to the field of motor manufacturing and control, and relates to a permanent magnet assisted bearingless synchronous reluctance motor, in particular to a rotor structure of a permanent magnet assisted bearingless synchronous reluctance motor capable of reducing torque and suspension force pulsation. Background technique [0002] Bearingless motor is a kind of AC motor with novel and unique structure and principle. The suspension force winding with pole logarithm difference of 1 is stacked in the stator torque winding. Electromagnetic torque can be generated at the same time by controlling the current flowing into the two sets of windings. and radial suspension force. Synchronous reluctance motor has the advantages of fast dynamic response, simple structure and low cost, and has received more and more attention in industrial applications. The bearingless synchronous reluctance motor has the advantages of both magnetic bearings and ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a rotor structure of a permanent magnet assisted bearingless synchronous reluctance motor to solve the problem that the existing permanent magnet assisted bearingless synchronous reluctance motor has large torque and suspension force pulsation during operation , improve the motor control precision, so as to realize the stable suspension and high-efficiency operation of the motor rotor, and better apply to the electric drive system

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