A Universal-Input On-Board Charger Integrated Power Converter for Switched Reluctance Motor Drive Based EV Application

In this article, the implementation of an integrated power converter (IPC) for a switched reluctance motor (SRM) drive is presented for electric vehicle (EV) applications. During driving mode, the proposed IPC is reconfigured as a modified asymmetric half-bridge (AHB) converter for SRM drive. During battery charging mode via a residential/public outlet, i.e., AC level-1 and AC level-2 charging, the proposed IPC is reutilized as an integrated on-board charger (OBC) by reconfiguring it into an interleaved buck cascaded buck-boost (IBuCBB) converter. The charging inductors for the IBuCBB configuration are realized via the phase windings of the SRM. Thus, the proposed IPC eliminates the requirement of an additional circuit for battery charging purposes. The integrated OBC facilitates battery charging over a universally available input voltage range, i.e., 85-265
$V_{rms}$
(root mean square), with acceptable performance and efficiency. In addition, the proposed IPC configuration results in zero torque production instantaneously from the current within the phase windings during battery charging operation. Detailed theoretical analysis and experimental verification on a prototype 4-phase SRM are presented to evaluate the proposed IPC's driving and on-board battery charging features.