DSP-embedded UPS controller for high-performance single-phase on-line UPS systems

Che Hung Lai*, Ying-Yu Tzou

*Corresponding author for this work

Research output: Contribution to conferencePaper

13 Scopus citations

Abstract

This paper proposes a DSP-controlled transformerless common-neutral single-phase on-line UPS with balanced charging/discharging control. All the control functions for an on-line UPS, which includes power-on start-up control, input stage power factor control, battery charging and boosting control, output stage ac voltage regulation, and shut-down control, were realized by using a single-chip DSP controller. A multiple rate digital controller generates all the PWM control signals for the power stage by using a set of detected feedback signals. Software current control scheme with nonlinear pulsewidth compensation has been developed to eliminate the nonlinearity caused by the dead-lock protected PWM converters. A nonlinear digital control scheme with lower switching frequency has been developed for the power factor control of the ac-dc converter. Computer simulation and experimental results have been given to verify the proposed digital control scheme. The constructed DSP-controlled UPS system can achieve fast dynamic response for nonlinear loads and high power factor under various loading conditions.

Original languageEnglish
Pages268-273
Number of pages6
DOIs
StatePublished - 1 Dec 2002
EventProceedings of the 2002 28th Annual Conference of the IEEE Industrial Electronics Society - Sevilla, Spain
Duration: 5 Nov 20028 Nov 2002

Conference

ConferenceProceedings of the 2002 28th Annual Conference of the IEEE Industrial Electronics Society
CountrySpain
CitySevilla
Period5/11/028/11/02

Keywords

  • Digital control
  • Digital power factor control
  • Digital signal processor (DSP)
  • Nonlinear pulsewidth compensation
  • On-line UPS
  • Software current control
  • Total harmonic distortion (THD)

Fingerprint Dive into the research topics of 'DSP-embedded UPS controller for high-performance single-phase on-line UPS systems'. Together they form a unique fingerprint.

  • Cite this

    Lai, C. H., & Tzou, Y-Y. (2002). DSP-embedded UPS controller for high-performance single-phase on-line UPS systems. 268-273. Paper presented at Proceedings of the 2002 28th Annual Conference of the IEEE Industrial Electronics Society, Sevilla, Spain. https://doi.org/10.1109/IECON.2002.1187519