Aiming at the problem that the transmission efficiency of the wireless power transfer (WPT) system is restricted by the mutual inductance caused by the spatial position offset of the coupling coil and the load change, this paper proposes a mutual inductance identification based on the L-curve regularization (LR) method and an active rectifier (AR) synchronous tracking composite control strategy based on sliding mode control (SMC) technology. Firstly, the parameters and transmission efficiency of the bilateral LCL-type topology wireless power transfer system are analyzed. By adjusting the system parameters and taking the correction values obtained by the LR method as the discrimination conditions, it is verified whether the system has completed the transmission efficiency optimization. Among them, on the secondary side, the power matching method is adopted to adjust the constraint relationship between the outward phase Angle of the system and the AR duty cycle to achieve the maximum power output. Meanwhile, on the primary side, the feedforward-phase shift (FF-PS) modulation strategy is utilized to adjust the duty cycle of the inverter to achieve constant voltage output. Furthermore,
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