A Novel and Simple Integrated On-Board Charger for E-Mobility

This article introduces a novel integrated charger for electric vehicles (EVs). Unlike conventional chargers, this charger seamlessly utilizes the motor and inverter of a motor drive system for charging purposes, eliminating the need for external chargers and additional semiconductor components or control circuitry. This innovative approach not only reduces costs but can also minimize the overall size of EVs. Unlike traditional integrated chargers, the proposed charger does not require access to the motor's neutral or any reconfiguration of its windings. Additionally, it operates without generating torque during the charging process, making it particularly appealing for EVs, especially in micromobility applications. Moreover, it has fewer components, has low voltage stress on switches, and does not have an inrush current issue. A comprehensive analysis, simulations, and experimental results of the proposed charger are presented. Furthermore, it has been successfully implemented and tested on a one-motor drive electric scooter with an input voltage of 110 Vrms/60 Hz, output voltage of 28 V, output power of 250 W, and a switching frequency of 50 kHz.