Design and control of asymmetrical multi-level inverters

This paper deals with asymmetrical multi-level inverters. The investigated topologies consist of series connected cells with different input voltages. Some combinations of different input voltages have been proposed to improve the converter resolution. This paper has a general approach. It describes the rules to obtain a uniform step with these topologies. It points out the switching problem of some of these asymmetrical solutions, describes the rules to avoid this problem, resulting in a solution where the number of commutations and hence the switching losses may be reduced. For this purpose, it also proposes an adapted optimal control strategy based on a geometrical approach, and a scheme for the control of multi-level inverters.

Presented at:
IECON 2002 : The 28th Annual Conference of the IEEE Industrial Electronics Society, Sevilla, Spain, 5-8 November 2002

Note: The status of this file is: EPFL only

 Record created 2005-11-18, last modified 2018-01-27

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