Three-Phase LLC Resonant Converters for Battery Chargers-Slides

Abstract: Three-phase LLC resonant converters can handle very high power levels beyond the capabilities of half-bridge and full-bridge LLC topologies. Among other characteristics, three-phase LLC structures reduce output current ripple (small output filter), enable parallel power processing (low peak current), and provide good thermal distribution. However, the design of three-phase LLC converters for fast Electric Vehicle (EV) chargers can be challenging. This talk explores some of the requirements for fast EV battery chargers (voltage regulation, current balancing, etc.) and proposes tentative solutions to overcome them.