An integrated charger with high efficiency over wide range of input voltage with G2V, V2G, and direct V2V capabilities for SRM drive

Abstract

Single-phase AC level-1 on-board charging module (OBCM) integrated with electric vehicle (EV) drive-train facilitates battery charging via a standard residential socket. However, level-1 OBCMs are slow chargers due to their space, weight, and cost constraints. To address these problems, level-1 charging is realized via integrated converters (ICs). The article proposes an IC with drive and charge ability. For faster grid-to-vehicle (G2V) charging, i.e., single-phase AC level-2 charging, a bridgeless buck-boost power factor correction (BBB-PFC) rectifier configuration is integrated with the IC. For operating over a wide range of input voltage with high efficiency, the BBB-PFC configuration operates in buck, boost and/or buck-boost mode. The proposed IC allows the battery to connect and charge/discharge via emerging vehicle-to-vehicle (V2V) charging technology, dc microgrids of voltage rating higher or lower than the EV battery voltage. Thus, allowing fast battery charging via AC (single-phase) and DC sources. The proposed IC implementation does not require any hardware or phase winding modification and/or an external mechanical brake to assist a standstill rotor. Implementation of the proposed IC is presented with simulation and experimental validation for the same.