A conical magnetic levitation switched reluctance motor system and its control method

Abstract

The invention discloses a conical magnetic suspension switched reluctance machine system and a control method thereof. The system comprises a switched reluctance machine and two conical magnetic bearings, wherein the two conical magnetic bearings are arranged at two sides of the switched reluctance machine, a bias suspension winding, a radial suspension winding and an axial suspension winding are wound around each conical stator, bias windings are connected in series to form a set of bias winding, the set of bias winding is connected in series to a DC bus of a novel asymmetric half-bridge power convertor of an armature winding, the axial suspension windings of each magnetic bearing are connected in series to form two axial suspension windings, the two axial suspension windings independently control, a certain bias flux is also generated except an axial force is generated, the rotation control mode is the same as that of a traditional switched reluctance machine, a suspension force is only relevant to a bias current and six suspension currents, and the six suspension currents are simplified to five suspension currents during control, the bias current is a sum of three phase armature currents all the way and is not controlled, and a torque and the suspension force are in decoupling control. The system is high in integration, armature current utilization ratio and high-speed adaptability and simple in structure, and is simple to control.

Description

technical field [0001] The invention relates to a conical magnetic levitation switched reluctance motor system and a control method thereof, belonging to the technical field of magnetic levitation switched reluctance motors and control thereof. Background technique [0002] The magnetic levitation switched reluctance motor not only has the advantages of no friction and no lubrication of the magnetic bearing, but also inherits the high-speed adaptability of the switched reluctance motor and meets the harsh working environment. It has unique characteristics in aerospace, flywheel energy storage and military applications. Advantage. [0003] The magnetic levitation switched reluctance motor is usually composed of a five-degree-of-freedom magnetic bearing and a switched reluctance motor. The traditional magnetic bearing requires a large thrust plate, which will cause large eddy current loss and temperature rise; while the traditional conical electric excitation magnetic bearing ...

AI Technical Summary

Problems solved by technology

[0003] The magnetic levitation switched reluctance motor is usually composed of a five-degree-of-freedom magnetic bearing and a switched reluctance motor. The traditional magnetic bearing requires a large thrust plate, which will cause large eddy current loss and temperature rise; while the traditional conical electric excitation magnetic bearing There are more control objects, which is not conducive to the simplification and reliability of the system

In addition, the motor and the magnetic bearing control system in the traditional magnetic levitation switched reluctance motor system are independent, and the integration degree is not high

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