Novel isolated high-step-Up DC-DC converter with voltage lift

Tsorng Juu Liang, Jian Hsieng Lee, Shih Ming Chen, Jiann Fuh Chen, Lung Sheng Yang

Research output: Contribution to journalArticlepeer-review

161 Citations (Scopus)


A novel two-switch high-step-up isolated converter with voltage lift is proposed in this paper. The proposed isolated converter utilizes a transformer with low turn ratio to achieve high step-up gain. The secondary winding charges two boosting capacitors in parallel as switches during the switch-on period, and two boosting capacitors are discharged in series during the switch-off period. Thus, the converter has high voltage gain with appropriate duty ratio. In addition, by using two clamping diodes and a capacitor on the primary side, leakage energy is recycled, and the voltage spikes of the two active switches are clamped, thereby improving conversion efficiency. Finally, experimental results based on a prototype implemented in the laboratory with an input voltage of 24 V, an output voltage of 200 V, and an output power of 200 W verify the performance of the proposed isolated converter; full-load efficiency is nearly 93%.

Original languageEnglish
Article number6093745
Pages (from-to)1483-1491
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Issue number4
Publication statusPublished - 2013 Jan 1

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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