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2024-06-18
Active Disturbance Rejection Control Strategy for a Novel Wide-Rotor Bearingless Switched Reluctance Motor
By
Progress In Electromagnetics Research C, Vol. 144, 85-97, 2024
Abstract
A novel three-unit 8/4 wide-rotor bearingless switched reluctance motor has been designed to address the challenges of strong coupling and control difficulties between torque and suspension force in traditional bearingless switched reluctance motors. This motor features independent torque flux paths and suspension flux paths, allowing for separate control of torque and suspension force similar to traditional switched reluctance motors and active magnetic bearings. To tackle issues such as torque ripple, suspension force ripple, and reduced system robustness caused by external disturbances during operation, a torque sharing function and a suspension current PWM control strategy based on active disturbance rejection technology have been proposed. Firstly, mathematical models for the torque and suspension force of the three-unit 8/4 wide-rotor bearingless switched reluctance motor were established using Ansys simulation data and the Maxwell stress method. Subsequently, a torque sharing function and a suspension current PWM control system were developed based on these mathematical models. The endpoint of the commutation overlap zone was set at the maximum value of the phase inductance to eliminate the weak coupling effect of torque current on suspension force. Finally, active disturbance rejection control technology was introduced to compare its performance with that of traditional PID controllers in suppressing interference. Simulation results demonstrate that the proposed method ensures decoupling switching between each phase's motor torque and its associated suspension while enhancing anti-interference performance.
Citation
Yonghong Huang, Meng Sun, Ye Yuan, Fan Yang, and Xinyue He, "Active Disturbance Rejection Control Strategy for a Novel Wide-Rotor Bearingless Switched Reluctance Motor," Progress In Electromagnetics Research C, Vol. 144, 85-97, 2024.
doi:10.2528/PIERC24040302
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