Switched reluctance motor control system capable of realizing winding reconfiguration power converter

Abstract

The invention discloses a switched reluctance motor control system capable of realizing a winding reconfiguration power converter. The average torque estimator substitutes the three-phase rotor positions theta A-theta C and the three-phase currents iA-iC into a torque segmentation model to obtain three-phase instantaneous torques, and then the total average torque Tav is calculated; the winding connection mode selection module compares the current motor working point (n, Tav) with a switching boundary, and determines the state of a winding mode switching instruction SW0; according to the safety switching control strategy, three-phase winding mode switching signals SWA-SWC are output according to the SW0 state and the interval where the rotor position is located. Optimized turn-on angles and turn-off angles of the two winding connection modes are stored in the controller in the form of a two-dimensional lookup table, and the angle optimization module obtains the optimal turn-on angles and turn-off angles of the two winding connection modes corresponding to the current working point through a linear interpolation mode. According to the states of the SWA-SWC, selecting the optimal turn-on angle and turn-off angle of a corresponding winding connection mode, and according to the optimal turn-on angle and turn-off angle, generating a commutation signal by a current controller, and performing hysteresis control on the phase current in an excitation interval to generate a chopping signal; the control signal selection module selects the control signals G1-G15 of the power switches S1-S15 according to the states of the SWA-SWC, and drives the motor to operate in the selected winding connection mode.

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