Axial Parallel Hybrid Structure Bearingless Switched Reluctance Motor and Control Method

Abstract

The invention discloses an axial parallel mixed structure bearingless switched reluctance motor and its control method. The motor stator is composed of a reluctance motor stator and a magnetic bearing stator, the rotor is composed of a salient pole rotor and a cylindrical rotor, and the winding is composed of a rotating The torque winding is composed of the reluctance motor winding and the wide-tooth winding, and the number is the same as the number of phases m; the suspension winding is composed of two radial direction suspension windings; the magnetic bearing stator is composed of 4 E-shaped structures Composition, the middle tooth width is twice the rest; the motor calculates the levitation current according to the direction of the levitation force; independently controls the torque winding current and the opening and closing angle of the power circuit, and controls the speed and torque in real time; independently controls the current of the two levitation windings , adjust the suspension force in real time, decoupling between rotation and suspension. The motor and the control method of the invention have less control variables, simple suspension control, and low cost of the power converter of the suspension system.

Description

technical field [0001] The invention relates to an axial parallel type hybrid structure bearingless switched reluctance motor and a control method, and belongs to the technical field of a magnetic suspension switched reluctance motor of the motor type and its control. Background technique [0002] Bearingless switched reluctance motor is a new type of magnetic levitation motor developed in the 1990s. Because the bearingless switched reluctance motor integrates the two functions of rotation and suspension, it can not only effectively solve the problems of loss and heat caused by bearing friction during high-speed operation, but also further exert the high-speed adaptability of the switched reluctance motor, thereby strengthening its Application basis in high-speed fields such as aerospace, flywheel energy storage, and ships. [0003] The study found that whether the rotation and suspension functions of the bearingless switched reluctance motor can be decoupled, as well as th...

AI Technical Summary

Problems solved by technology

The alternate conduction control method is often used, and the number of phases of the suspension winding is the same as that of the torque winding, resulting in a complex suspension power circuit and high cost

In addition, since the torque winding current needs to be chopper-controlled during the levitation excitation phase to provide the required bias flux for the levitation winding, it is also unable to be fully excited, resulting in limited output torque

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