Impact of Deadtime and Modulation Schemes on 800 V / 40 kW IMS-based 3L-ANPC Inverter
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:10.30420/566541330
Proceedings: PCIM Conference 2025
Pages: Language: englishTyp: PDF
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Authors:
Ahmadi, Pouya; Gonzalez, Jose Ortiz; Mawby, Philip; Zhang, Xu; Rodriguez, Temoc
Abstract:
This study explores the application of 650 V / 60 A GaN HEMTs in 40 kW automotive inverters with an 800 V DC bus, utilizing a three-level Active Neutral-Point Clamped (ANPC) topology. It addresses challenges in loss balancing and evaluates the effects of full-mode and short-mode modulation schemes on inverter efficiency and thermal performance. Electrothermal simulations in MATLAB-SIMULINK evaluate power losses and junction temperatures, demonstrating that conduction losses dominate, with full-mode modulation achieving the highest efficiency. The impact of dead time is assessed through simulations, while experimental validation is performed on a single-phase inverter leg operating at 150 V DC voltage and 4 kHz switching frequency under different modulation schemes. The study also highlights the ben-efits of insulated metal substrates (IMS) in enhancing thermal management.