An Efficient Onboard Charging System Utilizing Reconfigured Motor Windings for EV Applications

This paper presents a three‐phase onboard charger based on reconfigured motor windings. In the proposed scheme, the motor windings, together with the traction converter switches, are utilized to form a three‐phase interleaved buck converter (IBC). The IBC is interfaced with a three‐phase AC–DC converter operating as a boost power factor correction (PFC) rectifier. The interleaved structure significantly reduces the battery‐side current ripple, thereby enhancing battery cycle life. In addition, the battery current is effectively shared among three inductors, resulting in reduced on‐state losses in the switches and lower copper losses in the inductors. Furthermore, a simplified control strategy is developed that minimizes current sensor requirements and eliminates the need for a proportional–integral (PI) controller, offering a clear advantage over conventional IBC control approaches. The proposed converter also achieves zero current switching (ZCS) for the IBC switches, thereby improving overall efficiency. The effectiveness and practicality of the proposed system are validated through real‐time implementation on an OPAL‐RT 4512 platform.