Design and Optimization of High-frequency Transformer for Isolated Single-Stage Three-Phase AC/DC Converter using Bidirectional Switches


This paper presents the design and optimization of the high-frequency transformer for an isolated single-stage three-phase AC/DC converter enabled by the 4H-SiC BiDirectional Field Effect Transistor (BiDFET). Non-dominated Sorting Genetic Algorithm II (NSGA-II) is used to perform a multiobjective optimization to minimize loss, weight, and volume. A 20 kW, 50 kHz hardware prototype based on the selected optimal point is characterized by a power amplifier. The finite element analysis simulation results are also presented to validate the core magnetic flux density and winding electric field strength. The experimental prototype was tested at 800 Vdc/480 Vrms at 10 kW rated power.

2023 IEEE Energy Conversion Congress and Exposition (ECCE)
Ramandeep Narwal
Ramandeep Narwal
Ph.D. Candidate

Ramandeep Narwal is a Ph.D. candidate in the research group of Prof. Subhashish Bhattacharya at the FREEDM Systems Center, NC State University.