Feasibility study of half- and full-bridge isolated DC/DC converters in high-voltage high-power applications

This paper discusses the half- and full-bridge DC/DC converter topologies for high-power (200 kW) high-voltage (3.6 kV) applications. Focus is on the primary part of these topologies, i.e. the feasibility of replacement of two high-voltage IGBTs in the full-bridge by two high-voltage film capacitors in the half-bridge. The implementation of a half-bridge topology will lead to a sufficient simplification of a power scheme layout as well as control and protection algorithms. The full-bridge topology gives a clear advantage of the twofold reduced current of inverter switches, thus providing a possibility of implementation of smaller devices for the same transferred power as compared to a half-bridge.