Circuital and mathematical modelling of flyback converters

A circuital and mathematical modelling of flyback converters is presented in this paper. It accounts for many parasitic elements of each flyback devices, among which transformer leakage inductances and junction capacitances of semiconductor devices. An equivalent circuital representation of the flyback converter is introduced at first, based on which a suitable mathematical model is determined. This requires the definition of appropriate switching signals in order to account for the different flyback operating modes properly. As a result, accurate voltage and current evolutions are achieved, especially regarding the transient phenomena occurring during both the TURN ON and the TURN OFF of the semiconductor devices. This is proved by a simulation study, which refers to the comparison between the proposed model and an accurate flyback circuital representation.

[1]  C. M. Maheshan,et al.  Modelling of flyback converter using state space averaging technique , 2015, 2015 IEEE International Conference on Electronics, Computing and Communication Technologies (CONECCT).

[2]  Ehsan Adib,et al.  Lossless passive snubber for double ended flyback converter with passive clamp circuit , 2014 .

[3]  Robert W. Erickson,et al.  Fundamentals of Power Electronics , 2001 .

[4]  Ignazio Marongiu,et al.  Enhanced modeling of DC-DC power converters by means of averaging technique , 2014, IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society.

[5]  M. Kazimierczuk.  Pulse-Width Modulated DC-DC Power Converters: Kazimierczuk/Pulse-width Modulated DC-DC Power Converters , 2008 .

[6]  A. Yahya,et al.  SPICE modelling of a valley switching flyback power supply controller for improved efficiency in low cost devices , 2012, 2012 IEEE International Conference on Circuits and Systems (ICCAS).

[7]  Leyla Gören Sümer,et al.  Lagrangian modeling of DC-DC buck-boost and flyback converters , 2009, 2009 European Conference on Circuit Theory and Design.

[8]  Juri Jatskevich,et al.  Corrected state-space averaged-value modeling of second-order flyback converter including conduction losses , 2013, 2013 26th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE).

[9]  J. Jatskevich,et al.  Numerical average value modeling of second order flyback converter in both operational modes , 2013, 2013 IEEE 14th Workshop on Control and Modeling for Power Electronics (COMPEL).

[10]  Alexander Abramovitz,et al.  State-Plane Analysis of Regenerative Snubber for Flyback Converters , 2013, IEEE Transactions on Power Electronics.

[11]  Weifeng Sun,et al.  Analysis on ringing effect of auxiliary winding in primary side regulated flyback converter , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[12]  Ned Mohan,et al.  Power electronics : a first course , 2011 .

[13]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .