A single ended SMR converter topology with optimized switching characteristics

The analysis and design of an improved single-ended SMR converter topology is presented in this paper. The novel feature of this topology is a nondissipative L-C type of sub-circuit which provides transformer flux balancing and improves converter efficiency. This is achieved by minimizing switching losses and returning to the source the energy stored in the transformer leakage and circuit stray inductances. Theoretical predictions and SMR converter design procedure are verified experimentally on a 1 kVA 20 kHz prototype circuit.