Control of a hybrid seven-level PWM inverter

A control strategy to operate a hybrid multilevel inverter is described in this paper. The inverter produces seven-level PWM voltage waveforms using twelve transistors and a three-phase transformer for harmonic elimination offering the following advantages: flying capacitors with neutral clamped cir...

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Bibliographic Details
Main Authors: Villarruel-Parra, A, Araujo-Vargas, I, Mondragon-Escamilla, N, Forsyth, A J
Format: Conference Proceeding
Language:English
Subjects:
Control
Converters
Image edge detection
Inverter
Inverters
Multilevel
Pulse width modulation
PWM
Registers
Switches
Three-phase
Transistors
Online Access:Request full text
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Description
Summary:A control strategy to operate a hybrid multilevel inverter is described in this paper. The inverter produces seven-level PWM voltage waveforms using twelve transistors and a three-phase transformer for harmonic elimination offering the following advantages: flying capacitors with neutral clamped circuits are not required, a small number of switching devices is used and the PWM switching losses are minimal. The proposed control technique is implemented on an 8 - bit microcontroller, and was designed to operate all the transistors of the converter using only one carrier and modulating signals, offering a simple control solution. The circuit operation and the design of the control principle are discussed in this paper together with experimental results obtained with a 1 kW prototype.
DOI:10.1109/CIEP.2010.5598913