New Topology of Quasi Resonant Flyback Converter

Nir Tzhayek, Aaron Shmaryahu, Kfir J. Dagan, Ilan Aharon

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Flyback converter is well-known topology and utilized in many applications where galvanic isolation or a high ratio conversion rate is required. This paper presents a new topology of an isolated switch mode power-converter. The fixed-frequency quasi-resonant converter is based in flyback family operating in discontinues conduction mode. The converter uses zero-voltage-switching techniques to improve the converter efficiency. The converter comprises coupled inductor, two switches, and a diode on the primary side. At the secondary side, there is a diode, coupled inductor, and output capacitor. The new topology enables to run the converter at constant switching frequency while preforming a quasi-resonance behavior. In this paper, the innovative topology is presented. First, the circuit operation steps are described, then the analytical equations are developed. To validate the proposed theory a case study was made; the circuit was modeled by PSIM simulation tool. The results are acknowledged that the innovative topology can decrease the circuit losses dramatically throughout all operating points.

Original languageAmerican English
Title of host publication2022 IEEE 23rd Workshop on Control and Modeling for Power Electronics, COMPEL 2022
ISBN (Electronic)9781665410816
StatePublished - 1 Jan 2022
Event23rd IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2022 - Tel-Aviv, Israel
Duration: 20 Jun 202223 Jun 2022

Publication series

NameProceedings of the IEEE Workshop on Computers in Power Electronics, COMPEL


Conference23rd IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2022

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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