Improved Modulation for Packed E-Cell Converter
| Autor: | Heikki Jarvisalo, Juhamatti Korhonen, Aleksi Mattsson, Tommi J. Karkkainen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Computer science
020209 energy 020208 electrical & electronic engineering Topology (electrical circuits) 02 engineering and technology Dead time Network topology 0202 electrical engineering electronic engineering information engineering Electronic engineering Waveform Inverter Power quality Transient (oscillation) Active filter Voltage |
| Zdroj: | IECON |
| Popis: | In the recent years, multilevel inverter topologies have gained a lot of attention for their ability to produce improved power quality. This paper addresses the operation of a nine-level single-phase inverter called Packed E-Cell Converter. The effects of dead time on the output voltage waveform is under study for the inverter topology. It is shown, that the topology lacks freewheeling paths during some of the commutations that would provide smooth transitions among the nine output voltage levels. With the original modulation, even a full DC link voltage transient pulse may occur during a dead time, which is four times as large as the intended voltage step. In this paper, an alternative switching state logic is proposed to improve the inverter output voltage waveform and the produced common-mode voltage. The original and proposed switching state schemes are simulated to demonstrate the obstacles to the applicability of the inverter topology. |
| Databáze: | OpenAIRE |
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