Adaptive fractional-order PI^λD control for switch reluctance motor driven by full-bridge power converter

Abstract

Switched reluctance motor (SRM) with ring winding structures exhibits significant current and torque ripple due to their nonlinear electromagnetic characteristics. To address this issue, this paper proposes an adaptive fractional-order PI^λD (FOPI^λD) controller with a parameter tuning method that dynamically adjusts control parameters based on DC voltage, nonlinear inductance, and delay time. A Simulink-based simulation of a single-phase inductive circuit verifies the feasibility of the proposed method. The adaptive FOPI^λD controller is further applied to an SRM control system, with simulation and experimental results demonstrating its effectiveness. Compared to the traditional hysteresis current controller, the proposed approach significantly reduces current and torque ripple across different operating conditions.