1. College of Electrical Engineering Beijing Jiaotong University Beijing 100044 China; 2. Beijing Jingneng Clean Energy Electrical Power Co. Ltd Beijing 100028 China; 3. Beijing Creat-Poreen Power Electronics Company Beijing 100193 China
Abstract：This papermainly discusses the dual-half-bridge (DHB) DC-DC converter. First, the operation principle of DHB is introduced and the possible switching processes are analyzed in details. Then, two soft-switching conditions of each switch are given. Moreover, three principles of the resonant current, output power and dead time are summarized. The minimum output power to realize the soft switching is derived. Finally, an improved control technique is proposed to extend the soft-switching range. The experimental results verify the theoretical analysis and the proposed control technique.
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2017, Vol. 32 
