Synchronous Optimal Pulsewidth Modulation for Low-Switching-Frequency Control of Medium-Voltage Multilevel Inverters

Author

Rathore, Akshay K. ; Holtz, Joachim ; Boller, Till

Author_Institution

Univ. of Wuppertal, Wuppertal, Germany

Volume

57

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

2374

Lastpage

2381

Abstract

This paper presents the mechanism and details of synchronous optimal pulsewidth modulation (PWM) generation for control of medium-voltage induction motor drives using multilevel inverters at low switching frequency. Multilevel inverters allow operation at multiple of dc-link voltage and reduce the total harmonic distortion (THD). Synchronous optimal PWM control permits setting the maximum switching frequency to a low value without compromising THD. Low switching frequency reduces the switching losses of the power semiconductor devices. An optimal control procedure is explained in detail. The performances of three- and five-level inverter topologies are compared. The experimental results of a five-level inverter drive using optimal PWM control are presented.

Keywords

PWM invertors; frequency control; harmonic distortion; induction motor drives; machine control; optimal control; power semiconductor devices; switching; PWM generation; dc-link voltage; low-switching-frequency control; medium-voltage induction motor drives; medium-voltage multilevel inverters; power semiconductor devices; switching losses; synchronous optimal PWM control; synchronous optimal pulsewidth modulation; total harmonic distortion; Medium-voltage drives; multilevel inverters; optimization; synchronous optimal pulsewidth modulation (PWM);

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2010.2047824

Filename

5446385