A NON-ISOLATED SOFT SWITCHED DC-DC CONVERTER WITH HIGH VOLTAGE GAIN

摘要

PURPOSE: A non-isolated soft switched DC-DC converter with a high voltage gain is provided to reduce voltage surge and switch loss by enabling soft-switching at a main switch and an auxiliary switch. CONSTITUTION: A filter inductor(L1) performs a filter function to pass a low frequency component of a power source. A switching unit(20) uses IGBT or MOSFET. The first IGBT(S1) of the switching unit is a main switch. The first and second IGBT(S2) complementary are operated during one period. An auxiliary circuit(30) comprises a first and second diode comprised of an auxiliary capacitor(C1) and an auxiliary inductor, and also includes a first filer capacitor and a second filter capacitor.