Five-degree-of-freedom electromagnetic-type magnetic suspension switched reluctance motor and control method

Abstract

The invention discloses a five-degree-of-freedom electromagnetic-type magnetic suspension switched reluctance motor and a control method. The motor comprises an electromagnetic-type axial and radial magnetic bearing, a switched reluctance motor and an electromagnetic-type radial magnetic bearing. The switched reluctance motor generates torque to realize rotary operation; the electromagnetic-type axial and radial magnetic bearing generates two radial suspension forces and one axial suspension force, and the electromagnetic-type radial magnetic bearing generates two radial suspension forces, sothat five-degree-of-freedom suspension operation is realized; the bias windings of the two magnetic bearings and the m-phase armature winding of the switched reluctance motor are jointly excited by apower converter, and the torque and bias magnetic flux are generated at the same time. According to the motor and the control method, the electromagnetic conversion efficiency is high, the system integration level and reliability are high, and comprehensive integration of the motor, the magnetic bearing and the control system is achieved; the torque control method is the same as a method of a traditional switch reluctance motor; five suspension winding currents are controlled to adjust five suspension forces, so control variables are few, the control is easy, the suspension power loss is small, and suspension precision is high.

Description

technical field [0001] The invention relates to a five-degree-of-freedom electromagnetic type magnetic levitation switched reluctance motor and a control method thereof, belonging to the field of magnetic levitation switched reluctance motors of motors. Background technique [0002] The magnetic levitation motor system composed of electromagnetic magnetic bearings and switched reluctance motors has strong adaptability to harsh working environments such as high temperature, high humidity, and strong corrosion because there is no permanent magnet in the system. It has unique advantages in applications such as harsh working environments. [0003] In the traditional electromagnetic levitation switched reluctance motor system, the two systems of the electromagnetic magnetic bearing and the switched reluctance motor are controlled separately, and two microprocessors are required to control them separately. There are many control variables, a large power system, high cost, and a hi...

AI Technical Summary

Problems solved by technology

[0003] In the traditional electromagnetic levitation switched reluctance motor system, the two systems of the electromagnetic magnetic bearing and the switched reluctance motor are controlled separately, and two microprocessors are required to control them separately. There are many control variables, a large power system, high cost, and a high level of integration. low reliability

In addition, since a large bias current is required to generate the required bias flux, the levitation power loss of traditional electromagnetic magnetic bearings is large, and the application is limited.

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