volume | PIER Journals

Abstract

In fixed switching frequency pulse-width modulation (PWM) drive systems for switched reluctance motors (SRMs), the duty cycle directly affects current-tracking precision and torque output performance. To address the slow dynamic response of conventional PI control and the model dependence and limited robustness of conventional model predictive duty-cycle control (MPDCC), this study proposes a robust duty-cycle control strategy based on double-power sliding mode compensation. This strategy constructs a duty-cycle generation mechanism by combining model predictive feedforward with sliding-mode compensation. It utilizes MPDCC to generate a base duty cycle, whereas a double-power sliding mode generates a compensation duty cycle to correct deviations. Simulated and experimental results demonstrate that the proposed strategy generates accurate PWM duty cycles, keeps the current tracking error bounded within a small quasi-sliding-mode band, and improves current-tracking accuracy and torque-ripple suppression under parameter-mismatch conditions, validating the robustness of the system against parameter mismatches.

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Dr. Huiying Yu

Professor Aide Xu

Dr. Wanping Zhao