Abstract: The load resistance changes may cause the variation of operational frequency of the inductively coupled power transfer (ICPT) systems, leading to the reduction of power transfer efficiency and system instability. An improved fuzzy control strategy is designed to ensure the stability of the resonant operational frequency when the load changes by controlling the effective value of the primary resonant capacitor array. This method promotes the power transfer efficiency and stability of ICPT systems. The experimental results verify the functionality and superiority of the proposed strategy.