Development of Isolated Multi-Port Converter with AC and DC Ports

Abstract

In this paper, a new circuit topology and driving method applied to a multi-port converter are proposed. The converter is connected to a grid, battery, high voltage AC load, and low voltage DC load using a multi-winding transformer. The multi- winding transformer, which consists of five isolated windings and a magnetic core, can reduce the number of converters and transformers. The control method, which can distribute electric power from the grid to the high and low voltage loads, was constructed and verified by experimental results. This electric power system can be applied to many isolated applications in the future.