This chapter introduces a dual-side capacitor tuning and cooperative control strategy for wireless EV charging. To enhance efficiency across wide output voltages and load variations, a reconfigurable IPT system is developed by integrating two switch-controlled capacitors (SCCs) into the DLCC compensation network. An analytical model is established to derive optimal capacitor tuning factors that reduce inductor RMS currents and minimize semiconductor turn-off currents. Building on this foundation, a dual-side cooperative control strategy is formulated to coordinate the inverter, rectifier, and SCCs, thereby achieving simultaneous dual-side ZVS, wide-range power regulation, and maximum efficiency tracking. Compared with the conventional triple-phase-shift (TPS) method, the introduced approach demonstrates superior performance across varying DC output voltages and power levels, achieving maximum efficiency improvements of up to 1.8% in boost mode and 1.9% in buck mode.

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Dual-Side Capacitor Tuning and Cooperative Control

  • Zhu Gangwei

摘要

This chapter introduces a dual-side capacitor tuning and cooperative control strategy for wireless EV charging. To enhance efficiency across wide output voltages and load variations, a reconfigurable IPT system is developed by integrating two switch-controlled capacitors (SCCs) into the DLCC compensation network. An analytical model is established to derive optimal capacitor tuning factors that reduce inductor RMS currents and minimize semiconductor turn-off currents. Building on this foundation, a dual-side cooperative control strategy is formulated to coordinate the inverter, rectifier, and SCCs, thereby achieving simultaneous dual-side ZVS, wide-range power regulation, and maximum efficiency tracking. Compared with the conventional triple-phase-shift (TPS) method, the introduced approach demonstrates superior performance across varying DC output voltages and power levels, achieving maximum efficiency improvements of up to 1.8% in boost mode and 1.9% in buck mode.