Practical Results of a Five-level Flying Capacitor Inverter

Oleg Sivkov

doi:10.14311/1299

Abstract

This paper investigates the realization of a five-level Flying Capacitor Inverter. After a brief description of general Power Electronic Converters and an introduction to the advantages of Multilevel Inverters over conventional two-level Inverters the main focus is on the five-level Flying Capacitor Inverter. The Flying Capacitor Multilevel Inverter (FCMI) is a Multilevel Inverter (MI) where the capacitor voltage can be balanced using only a control strategy for any number of levels. After a general description of five-level FCMI topology, the simulation and experimental results are presented. The capacitor voltage is stabilized here with various output voltage amplitude values. The simulation and experimental results of five-level FCMI show that the voltage is stabilized on capacitors using the control strategy. A single-phase five-level FCMI model is currently being developed and constructed in the laboratory. Some of the experimental results are available.

Highlights

Since the 1990s switching devices such as GTO thyristors and IGBT transistors have been widely used in Power Electronic Converters
This paper investigates the realization of a Multilevel Inverter (MI) that belongs to category (b) — Inverters
The purpose of this paper is to present the results of a theoretical study and the practical realization of a five-level Flying Capacitor Multilevel Inverter (FCMI)

Summary

Introduction

Since the 1990s switching devices such as GTO thyristors and IGBT transistors have been widely used in Power Electronic Converters These Converters are currently classified into: a) Rectifiers — Converters that convert an input alternating voltage and current into output direct voltage and current; b) Inverters — Converters that convert input direct voltage and current into output alternating voltage and current; c) DC voltage Converters (Choppers) — Converters that convert input direct voltage and current of one value into output direct voltage and current of other values; d) AC Converters — Converters that convert input energy with one parameters (alternating voltage, current, number of phases, frequency) into alternating output energy with other parameters. Power Electronic switchers are switched to two input voltages — positive and negative This type of Inverter is called a two-level Inverter. The Electronic Switcher voltage stress can be reduced using a series connection or a Multilevel Inverter

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Conclusion