Han Lim Lee, “보조 회로를 갖는 양방향 DC-DC 컨버터의 최적 소프트 스위칭 기법,” 아주대학교 공학석사 학위 논문, 2018. > Paper

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Paper

Thesis Han Lim Lee, “보조 회로를 갖는 양방향 DC-DC 컨버터의 최적 소프트 스위칭 기법,” 아주대학교 공학석사 학위 논문, 2018.

2018

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This paper proposes the zero-voltage switching (ZVS) bidirectional dc-dc converter (BDC) with an auxiliary circuit. The proposed BDC

can achieve the ZVS using an auxiliary circuit to improve the efficiency of the BDC at buck and boost operations. The auxiliary circuit

supplies the optimal energy to perform the ZVS of the main switches. The auxiliary circuit consists of back-to-back switch, resonant

inductor, and two capacitors. The resonant inductor of the small size and the auxiliary switch with the low rated voltage can be used.

The zero-current switching (ZCS) turn on and turn off operation of the auxiliary switches are possible. The proposed auxiliary switching

scheme has a look-up table for supplying the optimal energy to achieve the ZVS operation of the main switches. The proposed strategy

properly adjusts the turn-on time of the auxiliary switch according to the required load current. The proposed BDC is demonstrated by

the results of PSIM simulation and an experiment in a 3-kW ZVS BDC system.

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