Leakage Inductance and Turns-Ratio Optimization for Fixed Input Variable Output Dual Active Bridge Converter

An optimization procedure for leakage inductance and turns ratio selection of the fixed input variable output single phase-shift dual active bridge converter is presented. The procedure consists of determining the leakage inductance and turns ratio combination that will produce the lowest average semiconductor losses throughought the entire operating time. The time behavior of the output voltage is based on normal distribution and was generated through the inverse cumulative distribution function. A transformer with optimum leakage inductance and turns ratio was built to validate the procedure. The analytical RMS leakage inductance current was 16.5
$A$
, resulting in a 5 % variation from the experimental value of 17.4 A.