| Abstract |
A new topological variation of a Zero-Voltage and Zero-Current-Switching (ZVZCS) Phase-Shifted (PS) Full Bridge Converter (FBC) is introduced. By adding three saturable inductors to the ZVZCS FBC presented in (1) most of its problems, namely thermal stress of the saturable inductor, secondary side parasitic oscillations, and high reverse recovery losses of the rectifiers, can be alleviated. IGBTs rather than mosfets can be readily used for all primary side switches, leading to considerable cost savings. Due to the missing secondary side clamp circuit, the improvements can be obtained without additional costs compared to (1). A DC analysis together with design considerations are presented and backed up with experimental results taken from a 1.2kW IGBT-based power stage operated at a conversion frequency of 160kHz. |
