IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia (WIPDA-ASIA 2021)

Power exchange between vehicle and grid by bidirectional inductive power transfer (BIPT) system. To achieve a high transfer efficiency under a wide range of transmission power, this paper proposes a dual-side three-stage asymmetrical phase shift (TAPS) control strategy. With the proposed dual-side TAPS strategy, asymmetrically adjust the amplitude of the fundamental component of the excitation voltage with three adjacent control periods as a waveform period. A wide zero voltage switching(ZVS) range and a high system power factor can be realized simultaneously. In addition, when the load is light, the number of switching actions is significantly reduced. The control scheme for the primary-side full bridge and secondary-side full bridge is proposed, which considers both zero-voltage switching operation of all switches and optimization of transmission efficiency. Simulation are performed with triple-phase-shift (TPS) and the proposed TAPS control strategy, which shows that the BIPT system with the proposed TAPS control strategy achieves a higher efficiency in a wide range of transmission power.

Dual-Side Three-stage Asymmetric Phase Shift,Bidirectional Inductive Power Transfer