A Bidirectional Onboard Charger with G-V/V-G /V-H Functionality and Seamless Mode Transfer Capability for E-2 and E-3 Wheelers Applications

A bidirectional onboard charger (BOBC)-cum-domestic inverter (DI) with a grid to vehicle (G-V)/vehicle to grid (V-G) and vehicle to home (V-H) operational functionality and seamless mode transfer capability are presented in this work for the electric two and three-wheelers (E2/3Ws) applications. Unlike conventional E2/3Ws chargers, the presented BOBC fulfills the charging demand of E2/3Ws battery packs and incorporates several other notable features from future energy-efficient and customer-friendly market perspectives. On one side, the presented system satisfactorily realizes four quadrants of active/reactive (P/Q) power transfer between AC and DC ends during G-V and V-G operations, its V-H mode operational capability, on the other side, fulfills the purpose of a domestic inverter for the E2/3Ws customers. Further, its seamless mode transfer capability guarantees reliable operation of the overall system during grid disconnection-reconnection scenarios under G-V/V-G/V-H mode operations, thus ensuring a high-performance experience for the customers. Besides, the wide output voltage range feature (36 V – 120 V) of the presented BOBC makes it compatible with all class of LEVs and thus considerably easy the production and selection of the LEVs chargers. Based on these notable characteristics, the overall operation of the presented BOBC, design objectives, and control architecture are presented. Finally, the claimed features of the BOBC-cum-DI systems are comprehensively analyzed, and relevant results are presented for performance validation.