Design of resonant converter with the constraints of efficiency, power factor and converter KVA rating

This paper presents systematic and efficient design of modified series-parallel resonant converter (MSPRC). The converter design for high efficiency under the constraints of minimum losses and cost are discussed. Comparison of switching devices is given for selection of optimum device for the converter under consideration. A step-by-step design procedure for high power factor with reduction of the stresses on the resonant components of the converter is presented. Design procedure of litz wire is also given to reduce the winding losses of the magnetic components. To regulate the dc-output voltage, the variable frequency control and duty ratio control are used independently. Finally, simulation and experimental results on a typical modified series-parallel resonant converter are shown to validate the design procedure.