Design and Simulation of a Resonant Converter Based EV Charger for ITUEV Team

For EV battery chargers, high-power density and high-efficiency charging methods are essential. Chargers can increase the disturbance on AC power grid and an efficient charger with low distortion is needed. The power arrangement for a battery charger comprises an AC-to-DC converter featuring power factor correction (PFC), followed by an isolated DC-to-DC converter. Because of its many benefits, the LLC-type series resonant converter has become the most popular topology.In this study, an EV charger was designed based on PFC and LLC resonant converters. The topology of the charger was investigated. The design equations of PFC and LLC resonant converters were given. Voltage loop control was implemented to the PFC converter and LLC resonant converter was controlled by a dual-loop control system. Continuous current (CC) and continuous voltage (CV) modes were implemented for safety. The completed design is served for the use of ITU Electrical Vehicle Team.