Asymmetric Bidirectional Capacitive Power Transfer Method With Push-Pull Full-Bridge Hybrid Topology

• Published in: IEEE transactions on power electronics Vol. 37; no. 11; pp. 13902 - 13913
• Main Authors: Dai, Xin, Sun, Min, Deng, Pengqi, Wang, Rui, Su, Yugang
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.11.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Asymmetric; Asymmetry; bidirectional capacitive power transfer system; Bidirectional control; dynamic switching; Electric potential; Electronic devices; Energy conversion; Load flow; Load fluctuation; phase shifted; Power flow; Power transfer; Power transmission; soft-switching operating points; Steady-state; steady-state operation; Switches; Switching; Topology; Voltage
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2022.3175477

Bidirectional capacitive power transfer technology makes it possible for energy sharing among multiple electronic devices. This article proposes an asymmetrical bidirectional power conversion topology to satisfy different input and output characteristics' requirements and increase load variation tolerance. A π-T ( CLC - LCL ) resonant topology is designed for this bidirectional conversion mode with constant output voltage characteristics in both directions. A hybrid power flow regulation strategy is proposed by integrating multiple zero-voltage switching soft-switching operating points switching and phase-shifted mode. This method overcomes the problem of mixing two different type topologies (push-pull and full bridge) with two different power regulation modes (switch soft-switching operating points and phase shift), which provide a way to make two different chargers compatible. Simulation and experimental results verified the proposed method.