Integrated Converter With G2V, V2G, and DC/V2V Charging Capabilities for Switched Reluctance Motor Drive-Train Based EV Application
Vaibhav Shah, Saifullah Payami
Abstract
The article proposes an integrated converter (IC) with driving, grid-to-vehicle (G2V), vehicle-to-grid (V2G), and DC/ vehicle-to-vehicle (V2V) charging capabilities for electric vehicle (EV) drive-train employing switched reluctance motor (SRM). During drive mode, the battery supplies the driving power, and the proposed IC independently controls the individual phases of the SRM. When EV is standstill/ idle, the proposed IC can charge the battery via standard AC and DC charging sockets. For charging the battery via a single-phase residential/public AC outlet, i.e., G2V charging, the proposed IC exhibits a power factor correction (PFC) charger. The reconfigured switches are bidirectional, facilitating the flow of power in both directions, i.e., G2V and V2G charging. For fast charging of the battery via DC source, which includes emerging DC grids, solar photovoltaic systems, and battery source of another EV, i.e., V2V charging, the proposed IC exhibits a four-quadrant DC-DC converter (FQDDC). For realizing the inductors of the PFC charger and FQDDC converter, the phase windings of SRM are reconfigured. Thus, the proposed IC eliminates the requirement of any additional non-integrated circuit, which reduces the total switch count. Also, proposed way of reconfiguring inductors results in a standstill rotor at appropriate rotor positions. The above-stated claims of the proposed IC are validated via experimental studies.