Title :
A novel method oriented to evaluate the real characteristics of practical buck zero-voltage switching quasi-resonant converters
Author :
Polyzos, Nicolaos P. ; Tatakis, Emmanuel C. ; Safacas, Athanasios N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Patras Univ., Greece
fDate :
5/1/2001 12:00:00 AM
Abstract :
The output characteristics of buck zero-voltage switching quasi-resonant converters (ZVS-QRCs), presented in previously published works, are calculated considering equal input and output energies. Nevertheless, measurements that were taken with breadboarded buck ZVS-QRCs demonstrate an important deviation between the results of the theoretical analysis and the experimental data. This deviation becomes greater when the load current increases. This paper deals with a novel simulation method to approximate the real behavioral characteristics of Buck ZVS-QRCs. Analytical expressions are derived to calculate the power losses in each power converter component as well as the DC-voltage conversion ratio. Computer simulation results are confronted to experimental ones proving the effectiveness of the proposed method
Keywords :
DC-DC power convertors; load (electric); losses; resonant power convertors; switching circuits; DC-voltage conversion ratio; DC/DC power conversion; behavioral characteristics; buck zero-voltage switching quasi-resonant converters; computer simulation; load current; output characteristics; power converter component; power losses; real characteristics evaluation; simulation method; Computational modeling; Computer simulation; DC-DC power converters; Power semiconductor switches; Pulse width modulation converters; Stress; Switching converters; Switching frequency; Topology; Zero voltage switching;
Journal_Title :
Power Electronics, IEEE Transactions on
