Discrete sliding-mode control of a PWM inverter for sinusoidal output waveform synthesis with optimal sliding curve

Shih Liang Jung*, Ying-Yu Tzou

*Corresponding author for this work

Research output: Contribution to journalArticle

178 Scopus citations

Abstract

This paper presents a discrete sliding-mode control scheme with feedforward compensation for the closed-loop regulation of the pulse-width modulated (PWM) inverter used in an uninterruptible power supply (UPS). The proposed feedforward controller can effectively improve the tracking performance of the PWM inverter. In designing the sliding-mode controller, we have taken load disturbance into consideration to enhance the robustness of the PWM inverter. Moreover, the upper bound of the load disturbance under which the sliding condition can be maintained has also been derived. The sliding curve of the sliding-mode controller is designed such that the behavior of the controlled PWM inverter is optimal subject to the selected cost function. Due to the coordinate transformation proposed in this paper, only the output voltage needs to be measured as feedback for the purpose of closed-loop regulation. Simulation and experimental results are given to show the effectiveness of the proposed control scheme.

Original languageEnglish
Pages (from-to)567-577
Number of pages11
JournalIEEE Transactions on Power Electronics
Volume11
Issue number4
DOIs
StatePublished - 1 Dec 1996

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