Modular DC/DC converter with improved efficiency for electric vehicles applications

A modular approach for DC/DC converters to obtain desired voltages and currents is presented in this paper. A high efficiency low switch count isolated push-pull DC/DC converter is used as a unit module. The converters are connected in input series or parallel and output series, or parallel configuration to meet the desired power level. The aim is to obtain a flexible DC/DC converter block which can be used to cover a wide power range as well as a wide input and output voltage range. The converters and the communication topologies are designed in such a way that the numbers of unit modules can be connected in several different configurations to achieve the desired requirements with a minimum effort. The experimental details of a configuration with two converters, and with four converters, are considered in this work.