A five-degree-of-freedom conical magnetic levitation switched reluctance motor and its control method

Abstract

The invention discloses a five degrees-of-freedom conical magnetic levitation switch reluctance motor and a control method. The motor consists of a three-phase 12 / 8-pole switch reluctance motor and two conical magnetic bearings; the bias winding of one conical magnetic bearing and two windings in the A phase horizontal direction of the switch reluctance motor are connected in series while the biaswinding of the other conical magnetic bearing and the two windings in the A phase vertical direction are connected in series to form two channel A phase composite windings; a constant switch-on strategy is adopted to generate bias magnetic flux of the two magnetic bearings and to generate torque in the reluctance motor; the B and C phase winding structures in the switch reluctance motor in the motor are the same as that of the conventional switch reluctance motor, so that alternate excitation switch-on is performed to generate torque to realize rotary operation; by only controlling the current of the A phase two sets of windings and the current of four radial levitation windings, five suspension force can be controlled to realize the five degrees-of-freedom levitation; and the motor is high in system integration degree, high in magnetic utilization rate, simple in control and convenient to implement.

Description

technical field [0001] The invention relates to a five-degree-of-freedom conical magnetic levitation switched reluctance motor and a control method thereof, belonging to the technical field of magnetic levitation switched reluctance motors and their control. Background technique [0002] The magnetic levitation switched reluctance motor is usually composed of a switched reluctance motor and two magnetic levitation bearings; it not only inherits the advantages of magnetic levitation bearings such as no friction and no lubrication, but also can give full play to the high speed and environmental adaptability of the switched reluctance motor. , has unique advantages in military and civilian applications such as aerospace, flywheel energy storage, high-speed centrifuges, high-speed blowers, and high-speed spindle motors. [0003] The permanent magnet bias magnetic bearing in the traditional magnetic levitation switched reluctance motor generally requires a large thrust plate, whi...

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Problems solved by technology

[0003] The permanent magnet bias magnetic bearing in the traditional magnetic levitation switched reluctance motor generally requires a large thrust plate, which not only makes the processing and assembly difficult, but also causes large eddy current loss and serious temperature rise problems; in addition, the traditional electric excitation There is also the disadvantage of many control objects, which is not conducive to the simplification and reliability of the system; moreover, the motor and the magnetic bearing control system in the traditional magnetic levitation switched reluctance motor system are independent, the integration degree is not high, the power system is huge, and the cost high

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