基于改进型E类谐振拓扑并集成可控可变电感与阶梯磁芯收发耦合器的固定频率单级无线电机驱动器

This paper presents a single-stage wireless motor driver (WMD) based on a modified Class-E resonant topology for DC motor control. An active clamping circuit and a high-order harmonic suppression circuit are implemented to enhance switch reliability and optimize power transfer efficiency. Additionally, a variable inductor module, along with a stepped-core transmitter (Tx)/receiver (Rx) coupler set, is integrated into the resonant tank to enable fixed-frequency switching while maintaining high efficiency during coil misalignment. The paper covers system descriptions, circuit operating modes, steady-state analysis, and the design process of the magnetic components. A 180-W power rating WMD prototype was constructed to validate the theoretical analysis. The resonant tank demonstrated an efficiency improvement of up to 4.79%, and the system achieved a maximum efficiency of 89.72%, offering practical validation of the proposed concepts.