A method for direct control of torque and axial force of a linear rotary switched reluctance motor

By directly controlling the torque and axial force of the linear rotary switched reluctance motor, and using the flux linkage vector sector and hysteresis signal to select the voltage vector, the problem of large torque and axial force pulsation in the prior art is solved, achieving faster response and higher control accuracy.

CN114629410BActive Publication Date: 2026-05-26NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Application Number
CN202210127867.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-02-11
Publication Date
2026-05-26
Estimated Expiration
2042-02-11

AI Technical Summary

Technical Problem

Existing methods for controlling torque and axial force in linear rotary switched reluctance motors are greatly affected by model accuracy, resulting in large torque and axial force pulsations, slow response speed, and complex control.

Method used

By directly controlling torque and axial force, the equivalent total magnetic flux of the two windings is controlled, the flux linkage vector sector is calculated, and the voltage vector is selected based on the hysteresis signal to directly control torque and axial force, thus avoiding the solution process.

Benefits of technology

It reduces torque and axial force pulsation, improves system response speed, simplifies control strategy, and enhances control accuracy.

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Abstract

This invention discloses a direct control method for torque and axial force of a linear rotary switched reluctance motor. First, the sector containing the flux linkage vector is determined through calculation. Based on the flux linkage hysteresis signal and the torque hysteresis signal, the voltage vector required for control is determined. Then, the axial force is controlled within the control range of (-15°, 15°) where the rotor position is selected. The corresponding axial force voltage vector is selected based on the axial force hysteresis signal. Finally, the operating mode of each power converter switch is determined based on the signs of all voltage vectors. This invention significantly reduces torque and axial force pulsation by directly controlling the motor's torque and axial force, resulting in a faster system response. Operating modes for the torque winding and axial force winding are established separately for torque and axial force, respectively, leading to more reasonable vector selection. Furthermore, no model calculation is performed during the control process, so the control accuracy does not depend on the analytical model, improving the system response speed and simplifying the control strategy.
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