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대용량 및 높은 입력전압에 적합한 새로운 Three Level DC/DC컨버터
한상규(S.K.Han),오원식(W.S.Oh),문건우(G.W.Moom),윤명중(M.J.Youn) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
A novel three-level DC/DC converter (TLC)for high power applications operating from high input voltage is proposed Its switch voltage stress can be ensured to be only one-half of the input voltage. Nevertheless, since all input voltage is applied to the transformer primary side, it has good turns ratio The driving method of each module is same as those of the conventional phase-shifted ZVS full bridge PWM converter (PSFB) and the zero-voltage-switching (ZVS) of the leading leg are achieved exactly m the same manner as that of the PSFB<br/> Moreover, its three-level operation can considerably reduce the current ripple through the output inductor and it has no problems of the DC-link voltage unbalance. Therefore, It features a low voltage stress, high efficiency, low EM!, high power density, and small sized filter To confirm the operation, validity, and features of the proposed circuit, experimental results from a 200W, 600V/DC-48V/DC proto-type are presented.