A Comparison of Z-Source NPC Inverter and Z-Source 2-Level Inverter

Conference: VDE-Kongress 2010 - E-Mobility: Technologien - Infrastruktur - Märkte
11/08/2010 - 11/09/2010 at Leipzig, Deutschland

Proceedings: VDE-Kongress 2010

Pages: 7Language: englishTyp: PDF

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Tenner, S.; Hofmann, W. (Dresden University of Technology, Department of Electrical Machines and Drives, Helmholtzstraße 9, 01069 Dresden, Germany)

The Z-source inverter enables a single stage buck-boost conversion which is a useful characteristic in battery supplied electric vehicles. However, the boost operation leads to additional losses in the semiconductors of the inverter. This paper presents a comparison of Z-source 2-level inverter and Z-source NPC inverters with regard to their total losses and loss distribution during boost operation. Furthermore, different topologies of the Z-source NPC inverter are presented and their ability to short circuit the two Z-source networks independently is discussed.