A hybrid radial tapered magnetic bearing switched reluctance motor and its control method

Abstract

The invention discloses a hybrid radial conical magnetic bearing switch reluctance machine and a control method. The machine comprises a switch reluctance machine, two radial magnetic bearings and two conical magnetic bearings, wherein one of the radial magnetic bearings and one of the conical magnetic bearings are arranged at one side of the switch reluctance machine, the other two bearings are arranged at the other side of the switch reluctance machine, bias windings of four magnetic bearings are connected in series with a winding of the switch reluctance machine to form an m-phase torque winding, torque control is the same as a traditional control mode of the switch reluctance machine, five directional suspension forces are only related to a current of the m-phase torque winding and a current of each directional suspension winding, the suspension forces are decoupled to one another, and the torque and the suspension forces can be in decoupling control. The machine and the control machine are high in integration, a few in control variable and simple in suspension control, and a suspension system power converter is low in cost.

Description

technical field [0001] The invention relates to a hybrid radial tapered magnetic bearing switched reluctance motor and a control method, belonging to the technical field of magnetic levitation switched reluctance motors and their control. 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 permanent magnet bias magnetic bearing requires a large thrust plate, which will cause large eddy current loss and temperature rise; while the traditional cone The shape electric exci...

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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 permanent magnet bias magnetic bearing requires a large thrust plate, which will cause large eddy current loss and temperature rise; while the traditional cone The shape electric excitation magnetic bearing has more control objects, and the axial suspension force is related to the square of the control winding current, 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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