Harmonic-Based Phase-Shifted Control of Inductively Coupled Power Transfer

• Published in: IEEE transactions on power electronics Vol. 29; no. 2; pp. 594 - 602
• Main Authors: Cai, H, Shi, L, Li, Y
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-02-2014; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Efficiency; Electric currents; Electric potential; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Exact sciences and technology; Frequencies; harmonic; Harmonic analysis; inductively coupled power transfer (ICPT); Inverters; Miscellaneous; phase-shifted control; Power control; Power generation; Power networks and lines; power regulation; Power supply; Power system harmonics; Power transfer; Regulation and control; Strategy; Switches; Switching; Switching frequency; Testing. Reliability. Quality control; Voltage; Windings; Performance evaluation; Harmonic; Inverter; phase-shifted control; Output power; Phase shift; Control system; Power transmission; Phase control; Power electronics; Experimental study; Switching; inductively coupled power transfer (ICPT); Deadtime; Electrical network; Power control; Output voltage; Efficiency; Resonance frequency; High efficiency; Power regulation; Control method; Inductive coupling; Energy transfer
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2013.2257865

It is a key issue for inductively coupled power transfer system that the output power is regulated with high efficiency especially over a wide load range. In this paper, a novel harmonic-based phase-shifted control method is proposed. With this method, the harmonic component other than the fundamental component of the resonant inverter output voltage is employed to regulate the transferred power. The output power is controlled by changing the phase-shifted angle of the inverter. Different from the conventional approaches, the switching frequency in this method is much lower than the resonant frequency, meaning much reduced switching losses. The operation principle, switching strategy, and dead-time effect have all been presented. Experimental results demonstrate that the proposed power control method can achieve significant performance improvement at the light-load condition.