Master-slave with phase-shift control strategy for input-series and output-parallel full-bridge DC-DC converter system

Abstract

This paper deals with a master-slave control strategy for a ISOP (input-series and output-parallel) connected full-bridge DC-DC converter system, and each separate module is controlled by phase-shift control method. The master module regulates the output voltage of the whole system, and overcomes the problem of narrow range of output voltage regulation. The slave module balances input voltages between two modules. At the same time, the strategy has advantages of high flexibility and that it is easy to implement modularization, which is suitable for high input voltage and high power system. In this paper, the principle of phase-shift control method and the realization of master-slave control strategy are described. At last, the master-slave with phase-shift control strategy is verified by simulation.