Interleaved Half-Bridge Flyback Converter With Zero-Current Switching

Tsorng Juu Liang, Ming Hsien Cheng, Wen Yu Huang, Wei Jing Tseng

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Conventional interleaved half-bridge flyback converters can recycle the leakage energy stored in leakage inductance to clamp the voltage across the main power switches at a dc input voltage. However, such converters still suffer from high switching losses, especially turn-off losses. In this paper, a novel turn-off zero-current-transition (ZCT) circuit is proposed for reducing the turn-off switching losses. The proposed ZCT interleaved half-bridge flyback converter operates at a fixed frequency without increasing the voltage stresses of the main switches. To verify the design, a laboratory prototype is implemented with 100 kHz, an input voltage of 400 V, and an output voltage of 24 V/480 W. The experimental results reveal that the proposed converter at full load and 20% load has efficiencies of 93.05% and 89.06%, yielding efficiency improvements of 1.17% and 4.12%, respectively, compared with the conventional interleaved half-bridge flyback converter.

Original languageEnglish
Article number8401921
Pages (from-to)3370-3383
Number of pages14
JournalIEEE Transactions on Power Electronics
Issue number4
Publication statusPublished - 2019 Apr

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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