Power Supply Design Considerations For 400Hz Aircraft Applications

Abstract

In this study a 5kW power supply for aircraft applications has been designed. Boost type power factor correction topology Delta rectifier complies with military standards of conducted emissions and is selected as a front-end rectifier for 400 Hz mains power supply. For isolation and output Dc voltage regulation a full bridge Dc-Dc converter with 99% efficient high frequency transformer has been designed. Reducing Winding Losses Key to reducing windings losses is the adjustment of high frequency eddy current effects, this is accomplished by having thinner foil and extensive interleaving of the transformer windings [19]. Results from MATLAB optimization algorithm are shown in Fig. 12 and Fig. 13. Reducing Core Losses Eddy current losses in the core increase as the frequency is increased in a transformer core this phenomenon is also captured by the curve fitted Steinmetz equation.