A new UPS topology employing a PFC boost rectifier cascaded high-frequency tri-port converter

Jia You Lee, Yu Ming Chang, Fang Yu Liu

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

A new uniterruptible power supply (UPS) topology using the high-frequency tri-port UPS technique is proposed which presents the advantages of no-break power, low cost, input unity power factor, high power density, and high power conversion efficiency. Through the proposed circuit configuration, charging concept, and control strategy, the battery management is easily obtained by controlling the output voltage of the power-factor-correction (PFC) converter, which results in no additional power device being required for charging. The implementing circuit of the charging method is submitted to perform the two-stage charging, constant current charging, and constant voltage charging. The proposed technologies can be applied to the switching power supply with built-in UPS function featuring a low-cost solution for computer equipment. Finally, an experimental ac online UPS is built to verify the proposed concept, analysis, and control strategy.

Original languageEnglish
Pages (from-to)803-813
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume46
Issue number4
DOIs
Publication statusPublished - 1999

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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