Control of PWM inverter using a discrete-time sliding mode controller

Author

Wong, L.K. ; Leung, Frank H F ; Tam, Peter K S

Author_Institution

Dept. of Electron. & Inf. Eng., Hong Kong Polytech., Kowloon, Hong Kong

Volume

2

fYear

1999

fDate

1999

Firstpage

947

Abstract

PWM inverters are widely used in UPS systems and driving induction motors. They give AC sinusoidal voltage under linear or nonlinear loads which is a basic tracking control problem. Since the duty cycle of a PWM inverter is unchanged within one switching period, inverters are very suitable to be represented by discrete-time state equations. A discrete-time sliding-mode controller based on an improved reaching condition has been proposed by Gao et. al. This paper applies this controller to control PWM inverters with linear and nonlinear loads. It is shown that good output responses are obtained in both cases

Keywords

DC-AC power convertors; PWM invertors; control system synthesis; discrete time systems; load (electric); switching circuits; variable structure systems; voltage control; AC sinusoidal voltage; PWM inverter; UPS systems; control design; discrete-time sliding mode controller; discrete-time sliding-mode controller; discrete-time state equations; duty cycle; improved reaching condition; induction motors; linear loads; nonlinear loads; output response; switching period; tracking control problem; Equations; Filters; Induction motors; Inductors; Pulse width modulation inverters; Sliding mode control; Switches; Switching frequency; Uninterruptible power systems; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems, 1999. PEDS '99. Proceedings of the IEEE 1999 International Conference on

Print_ISBN

0-7803-5769-8

Type

conf

DOI

10.1109/PEDS.1999.792835

Filename

792835