Model-Based Cost-Benefit Analysis on Si/SiC Hybrid Switches for Traction Inverters
Conference: PCIM Conference 2025 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/06/2025 - 05/08/2025 at Nürnberg, Germany
doi:10.30420/566541358
Proceedings: PCIM Conference 2025
Pages: Language: englishTyp: PDF
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Authors:
Nakamura, Yohei; Yamaguchi, Atsushi; Ishido, Ryosuke; Kashiwagi, Junichi; Oku, Yoshiaki; Nakahara, Ken
Abstract:
This study presents a model-based cost-benefit analysis of a silicon/silicon carbide (Si/SiC) hybrid switch (HyS) traction inverter for electric vehicles. The HyS consists of a SiC MOSFET and a Si IGBT connected in parallel. We simulate how a chip area ratio between the two affects the cost-benefit balance of a traction inverter, assuming that the cost comes from the chips used and a battery, where the battery capacity is set to meet a target mileage. The simulations provide the optimal chip configuration mapping for a given battery capacity and SiC MOSFET cost. The results demonstrate that the HyS is optimal for inverters with a battery capacity of 10–30 kWh, typical of plug-in vehicles, compared with configurations employing only Si or only SiC devices.