A hybrid magnetic bearing double-winding switched reluctance motor and its control method

Abstract

The invention discloses a mixed magnetic bearing dual-winding switch reluctance motor and a control method. The motor consists of a switch reluctance motor and two radial magnetic bearings; a magnetic bearing stator is formed by four E-shaped structures, and the middle tooth of each E-shaped structure is wound with a suspension winding; each tooth of the switch reluctance motor is wound with a bias winding and a reluctance motor winding separately; the bias winding transversely crosses two magnetic bearing stators and a switch reluctance motor stator while the reluctance motor winding only winds the reluctance motor stator; two windings are connected in series to form a torque winding string, and a three-phase torque winding can be formed; the torque control is the same as the control way of the conventional switch reluctance motor; the suspension force in two directions of each magnetic bearing is only related to the three-phase torque winding current and two suspension currents, and decoupling control of the torque and the suspension force can be realized; the motor and the control method disclosed by the invention are high in integration degree, less in control variables and simple in suspension control, and the suspension power converter is low in cost; and design of decoupling control of the torque and the suspension force can be realized.

Description

Technical field [0001] The invention relates to a hybrid magnetic bearing dual-winding switched reluctance motor and a control method thereof, belonging to the technical field of a magnetic suspension switched reluctance motor of the motor category and its control. Background technique [0002] Magnetically suspended switched reluctance motors not only have the advantages of frictionless and lubricated magnetic bearings, but also inherit the high-speed adaptability of switched reluctance motors and meet the harsh working environment. It is unique in aerospace, flywheel energy storage and military applications. Advantage. [0003] Magnetic levitation switched reluctance motors usually have two realization forms, one is the structure of a bearingless motor, and the other is the structure of a magnetic bearing motor. The bearingless switched reluctance motor integrates the function of the magnetic bearing with the motor, and realizes rotation and radial levitation at the same time, w...

AI Technical Summary

Problems solved by technology

The bearingless switched reluctance motor integrates the function of the magnetic bearing with the motor to achieve rotation and radial suspension at the same time, which will inevitably lead to a compromise in the torque performance of the motor and cannot be fully utilized

The magnetic bearing switched reluctance motor is composed of a magnetic bearing and a switched reluctance motor to form a magnetic levitation system. The levitation control and rotation control are independent, and the integration level is not high.

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