1. Dead-Time and Semiconductor Voltage Drop Compensation for Cascaded H-Bridge Converters.
- Author
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Mora, Andres, Juliet, Jorge, Santander, Alex, and Lezana, Pablo
- Subjects
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ELECTRIC properties of semiconductors , *ELECTRIC potential , *CASCADE converters , *NONLINEAR theories , *VOLTAGE control - Abstract
Compensation of nonlinear effects generated by dead-time and semiconductors voltage drop has been widely studied in the literature about two-level converters. This paper takes a closer look at those analyses for multilevel converters, specifically for a cascaded H-bridge (CHB) converter modulated with phase-shifted pulse width modulation. The interaction between the cells is analyzed for a generic $n$ -cell converter, from which a general expression for the distortion generated by the nonlinearities has been obtained. Based on this expression, a compensation signal for the overall converter is calculated on each sample time, which is a fraction of the triangular carrier used to modulate each cell, thus significantly improving the quality of the output voltage signals. Experimental validation of the proposed compensation method is presented using a three-phase four-cell CHB converter prototype of 5.5 kW. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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