Five-level inverter scheme for an open-end winding induction machine with less number of switches
- 1 January 2010
- journal article
- Published by Institution of Engineering and Technology (IET) in IET Power Electronics
- Vol. 3 (4), 637-647
- https://doi.org/10.1049/iet-pel.2009.0058
Abstract
Higher level of inversion is achieved with a less number of switches in the proposed scheme. The scheme proposes a five-level inverter for an open-end winding induction motor which uses only two DC-link rectifiers of voltage rating of Vdc/4, a neutral-point clamped (NPC) three-level inverter and a two-level inverter. Even though the two-level inverter is connected to the high-voltage side, it is always in square-wave operation. Since the two-level inverter is not switching in a pulse width modulated fashion and the magnitude of switching transient is only half compared to the convention three-level NPC inverter, the switching losses and electromagnetic interference is not so high. The scheme is experimentally verified on a 2.5 kW induction machine.Keywords
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