A Speed‐Adaptive Control Method for the Switched Reluctance Motor With Ring Winding Structure

ABSTRACT This paper introduces a novel control strategy aimed at reducing power losses in switched reluctance motors (SRMs) with a ring winding structure by implementing a speed‐scheduling mechanism for circuit switching. Unlike traditional methods that utilize a three‐phase inverter with an additional voltage source, this new approach switches the driving circuit from a DC‐DC converter to a single diode circuit in the high‐speed region, enhancing efficiency. The minimum speed for operating mode switching is determined by analyzing the amplitude and direction of the winding currents. The paper presents comparative evaluations of power losses before and after implementing the new operating mode switching strategy, including a comparison with the pulse current method used in an asymmetric half‐bridge (AHB) driven system. Simulation and experimental results demonstrate that the proposed method significantly reduces power losses in ring structure circuits and improves operational efficiency. Compared to the conventional AHB circuit, it lowers torque ripple and reduces manufacturing costs of the hardware circuit. This strategy provides a practical solution for boosting the energy efficiency of SRMs, especially in high‐speed applications.