A Quasi 2-Level Modulation Technique to Increase Efficiency and Reduce Motor Overvoltage
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:10.30420/566541009
Proceedings: PCIM Conference 2025
Pages: 9Language: englishTyp: PDF
Authors:
Gick, Sebastian; Naumann, Moritz; Pfeifer, Markus; Nielebock, Sebastian; Bakran, Mark-M.
Abstract:
This paper explores a method to increase the efficiency of an IGBT B6 converter by using a small additional SiC T-branch. The resulting combination of 3-Level and quasi- 2-Level modulation significantly improves the efficiency by making optimal use of the SiC MOSFETs. The topology is ideally suited for a method of reducing motor overvoltage without the use of additional filters. This is also explored in this paper by conducting measurements at a motor test setup. Switching losses are also evaluated for the small turn on time of the T-branch, than can occur during this quasi 3-Level operation.