双有源S-S补偿无线电力传输系统的三相移和变频控制策略

This paper proposes a triple-phase-shift and variable frequency (TPS-VF) control strategy for dual active S-S compensated wireless power transfer (WPT) system. The control strategy coordinates the multiple control variables through completely analytical methods, enabling the system to achieve multiple control objectives simultaneously, including ZVS of all switches in both inverter and rectifier with minimum reactive current, wide-range output voltage regulation while effectively avoiding the excessive frequency deviation, and further efficiency optimization across varying loads. A 422.5W prototype with resonant frequency of 100kHz validates the strategy. Experimental results show that the system can achieve ZVS with minimum reactive current under wide voltage regulation range and wide load range. CV output across varying loads is achieved. Compared with traditional TPS control on the same experiment platform, a maximum efficiency improvement of up to 2.3% is verified. Smaller frequency deviation is also verified. Finally, the system is demonstrated to operate properly within a coupling coefficient range of 0.175 to 0.5. When k=0.25, the efficiency reaches 92.6%. When k=0.5, the peak efficiency reaches 94.4%.