Soft switched high step-up DC-DC converter for automotive application

In this paper, a hybrid topology that combines clamp-mode coupled inductor and voltage multiplier cell is proposed to provide high voltage gain, reduced switching losses and higher power density. The duty ratio of the converter is also maintained at safe limits while obtaining the required voltage gain. The topology has been designed for a 220V, lkW application operating from 12V input. The reactive elements are designed for a switching frequency of 50 kHz. Various operating modes, design equations, simulation and hardware results are presented. Hardware results prove that the converter performs satisfactorily.