Multiparameter Identification Algorithm With Constant-Voltage Control for Fractional-Order Wireless Power Transfer Systems

Fractional-order wireless power transfer (FOWPT) systems improve robustness by utilizing fractional-order components, addressing the performance degradation of traditional integer-order systems caused by parameter variations. However, they are still limited by the load range, coupling distance, and resonant frequency offset. Moreover, existing research seldom considers the influence of multi-parameter changes such as coil self-inductance, mutual inductance, and load on the output characteristics in practical applications. Therefore, this letter proposes a parameter identification method for FOWPT system based on differential evolution (DE) algorithm, which realizes the simultaneous identification of multiple parameters including load, self-inductance, and mutual inductance. Based on the parameter identification results, a constant-voltage (CV) output control strategy is further presented. Experimental results show that the system stably outputs 12V with an error of only 0.083%, verifying the feasibility and effectiveness of the proposed method and providing new insights for the optimization and application of FOWPT systems.