Скачать или смотреть IEEE IECON2025 SYPA Winner - Two-Stage DC-DC for EV APM

This video presentation describes the work in the paper titled: A Two-Stage Isolated DC-DC Architecture for EV Auxiliary Power Module

-Authors and Affiliation:
Pedro Lobler, Wellington Volz, Ademir Toebe, Cassiano Rech, Luciano Schuch
Federal University of Santa Maria (UFSM), Santa Maria – RS, Brazil

-Abstract:
This work presents a two-stage auxiliary power module (APM) for electric vehicle applications. The proposed architecture comprises a partial power converter (PPC) operating in step-down mode, interfacing with the high-voltage (HV) battery, and a half-bridge converter with an isolated current doubler (HB-CD) operating at a fixed conversion ratio (DCX), which ensures the galvanic isolation required in such applications. By employing the PPC as a pre-regulator, the HB-CD stage operates with reduced voltage across its semiconductors, allowing the use of devices with lower on-state resistance, thereby significantly reducing conduction losses, which are identified as the dominant source of loss in this context. Moreover, the fixed duty cycle operation (D = 0.5) guarantees zero-voltage switching (ZVS) on both the primary and secondary sides of the HB-CD stage, further improving overall efficiency. Simulation results validate the proposed strategy, demonstrating reduced voltage stress, full soft-switching behavior, and improved power conversion efficiency compared to a conventional single-stage architecture.