Digital controller of bidirectional multi-modular DC//DC converter implemented in FPGA

In this paper a design process of digital controller dedicated to bidirectional modular DC//DC converter with galvanic isolation with dual active bridge (DAB) was presented. Depending of the application, proposed system may work as parallel (IPOP) or series-parallel (ISOP) configuration and provide higher reliability - thanks to redundancy n+1. Realization of all features of this converter needs the large number of control signals and a huge performance, therefore digital controller was implemented in programmable logic array (FPGA). Finally, a very good performance of the controller was obtained, which was unable to reach by other microcontrollers.