Misalignment-Tolerant Optimization Control of a WPT System via Unilateral SF-SCC Compensation Network Tuning

To address the efficiency degradation caused by coil misalignment and compensation parameter drift in LCC-S wireless power transfer (WPT) systems, this paper proposes a single-switch full-wave switch-controlled capacitor (SF-SCC) compensation topology. This method effectively mitigates reactive power circulation caused by detuning. The impact of compensation parameters on the input impedance and system efficiency under conditions of coil misalignment and coupling coefficient variations is analyzed. Furthermore, by employing dual-independent multilayer perceptron (MLP) predictive control and a synchronous reference frame phase-locked loop (SRF-PLL) based reactive power detection scheme for SCC regulation, zero-voltage switching (ZVS) and an input zero-phase angle (ZPA) are realized, thereby enhancing the system transmission efficiency. A 200W experimental platform with a transmission distance of 50 mm was constructed to validate the proposed method. Under aligned conditions, the system achieves a maximum efficiency of 90.08% with SF-SCC compensation. At the maximum misalignment is 90 mm, the efficiency remains at 43.81%, which is an increase of 8.89% compared to the WPT system without SF-SCC compensation. These results validate the capability of the proposed SF-SCC compensation strategy in optimizing efficiency against misalignment.