Switching frequency optimal PWM control of a three-level inverter

Author

Steinke, Jürgen K.

Author_Institution

Asea Brown Boveri, Turgi, Switzerland

Volume

7

Issue

3

fYear

1992

fDate

7/1/1992 12:00:00 AM

Firstpage

487

Lastpage

496

Abstract

A pulse-width-modulation (PWM) method for the control of a three-level inverter is described. The switching frequency optimal-PWM method (SFO-PWM) works with a constant carrier frequency not synchronized with fundamental stator frequency. SFO-PWM gives an optimal utilization of the mean thyristor switching frequency permitted; therefore, PWM carrier frequency may be chosen to a value of two times the permitted mean thyristor switching frequency. The signal processing structure is simple. Many applications of three-level inverter work with a DC-link neutral point not stabilized from the power input converter. A neutral-point potential control is described, which is capable of stabilizing potential by varying the switching sequences of the three-level inverter itself. Results from computer simulation and practical experience show the good performance of SFO-PWM

Keywords

digital simulation; frequency control; invertors; optimal control; power engineering computing; pulse width modulation; switching; 3-level invertors; DC-link neutral point; SFO-PWM; The switching frequency optimal-PWM method; carrier frequency; computer simulation; mean thyristor switching frequency; neutral-point potential control; Application software; Frequency synchronization; Optimal control; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Signal processing; Stators; Switching frequency; Thyristors;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.145136

Filename

145136