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Oscillation effect of auxiliary winding in primary side regulated flyback converter
Author(s) -
Zhang Taizhi,
Xu Manchao,
Qian Qinsong,
Sun Weifeng,
Lu Shengli
Publication year - 2016
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22282
Subject(s) - flyback converter , oscillation (cell signaling) , flyback diode , control theory (sociology) , primary (astronomy) , electrical engineering , physics , topology (electrical circuits) , computer science , chemistry , engineering , voltage , boost converter , biochemistry , control (management) , artificial intelligence , astronomy
In the operation of a primary‐side‐regulated (PSR) flyback converter, oscillation of the auxiliary winding would degrade the system reliability, as this winding plays an important role. In previous works, the oscillation of the auxiliary winding was thought to be related to the oscillation of the primary winding when the switch is turned off. However, a comprehensive explanation has not been given for this phenomenon. Meanwhile, the oscillation of the auxiliary winding depends not only on the oscillation of the primary winding but also on the conducting size and the layer distribution. Based on a multi‐winding model obtained from the physical dimensions, this paper derives a mathematical expression to calculate the relation, in the time domain, between the ringing of the auxiliary winding and primary winding. The analytical results would allow the magnetic windings to be analyzed and optimized because the oscillation of the auxiliary winding is expressed as a function of the winding geometry and position. Besides, the skin and proximity effects as well as the nonlinear core properties are considered in the multi‐winding model. An application example is also included. Simulation and experimental results of a single‐stage, 16‐W PSR flyback converter are given to validate the proposed analysis. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.