Rotor structure of a permanent magnet assisted bearingless synchronous reluctance motor

Abstract

The invention discloses a rotor structure of a permanent magnet-assisted bearingless synchronous reluctance motor, on which four sets of magnetic barriers are evenly and symmetrically arranged along the circumferential direction, and each set of magnetic barriers is divided into an inner layer, a middle layer and a The outer layer, each magnetic barrier includes a rectangular permanent magnet installation slot, two magnetic isolation bridges distributed symmetrically about the center line of the permanent magnet installation slot diameter direction, and two ribs between the permanent magnet installation slot and the magnetic isolation bridge A permanent magnet is fixedly embedded in the permanent magnet installation groove in each layer of magnetic barriers. The radial contour of each magnetic isolation bridge includes the outer boundary line of the magnetic isolation bridge, the inner boundary line of the magnetic isolation bridge and the end of the magnetic isolation bridge. The two ends of the end of the magnetic bridge are respectively connected to the outer boundary line of the magnetic isolation bridge and the inner boundary line of the magnetic isolation bridge. The outer boundary line of the magnetic isolation bridge, the inner boundary line of the magnetic isolation bridge and the center line of the magnetic isolation bridge are all quadratic function curve segments. The part is composed of two Bezier cubic curves, which can effectively reduce the torque and suspension force pulsation.

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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