Output Power Adjustment in Inductively Coupled Power Transfer System
Cai Hua, Li Yaohua1
1. Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China; 2. University of Chinese Academy of Sciences Beijing 100049 China
Abstract:High efficiency output power adjustment is one of the key issues for inductively coupled power transfer(ICPT) system. Principle as well as characteristics of four basic output power adjustment methods - pulse amplitude modulation(PAM), pulse frequency modulation(PFM), phase-shifted control (PSC), and energy injection control(EIC) are analyzed and compared. According to the feature of PSC that system output power is regulated by shifting phase of inverter, a novel output power adjustment method by harmonic based phase-shifted control(HPSC) is proposed. The phase-shifted angle and reasonable operation range of different harmonics in HPSC are derived. The harmonic of inverter output voltage is used in power transfer instead of fundamental, which can decrease switching frequency for the same output power. The feasibility of the proposed method was verified by experimental results taking third harmonic for example.
蔡华, 史黎明, 李耀华. 感应耦合电能传输系统输出功率调节方法[J]. 电工技术学报, 2014, 29(1): 215-220.
Cai Hua, Li Yaohua. Output Power Adjustment in Inductively Coupled Power Transfer System. Transactions of China Electrotechnical Society, 2014, 29(1): 215-220.
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