DocumentCode :
1496519
Title :
Optimizing the LLC–LC Resonant Converter Topology for Wide-Output-Voltage and Wide-Output-Load Applications
Author :
Beiranvand, Reza ; Zolghadri, Mohammad Reza ; Rashidian, Bizhan ; Alavi, Seyed Mohammad Hossein
Author_Institution :
Coll. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
Volume :
26
Issue :
11
fYear :
2011
Firstpage :
3192
Lastpage :
3204
Abstract :
LLC-LC resonant converter is a suitable circuit topology to design switched-mode power supplies for wide-output-voltage and wide-output-load applications. In this paper, a design procedure is introduced to optimize this converter. Unlike soft switching techniques for pulse width modulated converters, which usually apply an active auxiliary circuit to reduce switching losses and EMI, in the proposed converter, not only such circuits are not used, but also all of the parasitic elements are merged to the converter´s main components. Zero-voltage switching (ZVS) operation is realized for all power devices under all operating conditions. Thus, this converter is a suitable choice for high-switching-frequency operation. The converter parameters have been designed to minimize the components´ current and voltage stresses. In addition, the frequency variation range has been reduced in order to use the magnetic components, optimally. Developed prototype of the converter has been tested for different output voltages (25-165 Vdc) under different loads (0-3 Adc) and input voltages (320-370 Vdc) for being used as ion implanter arc power supply. For regulating and adjusting the designed prototype converter output voltage, its switching frequency varies from 177 to 314 kHz. The converter´s maximum efficiency is approximately equal to 96.6%.
Keywords :
network topology; resonant power convertors; switched mode power supplies; zero voltage switching; LLC-LC resonant converter topology; ZVS operation; circuit topology; current stress; frequency 177 kHz to 314 kHz; frequency variation range; high-switching-frequency operation; magnetic component; parasitic element; switched-mode power supplies; voltage 25 V to 165 V; voltage 320 V to 370 V; voltage stress; wide-output-load application; wide-output-voltage application; zero-voltage switching; Capacitance; Frequency conversion; MOSFETs; Resonant frequency; Switching frequency; Voltage control; LLC–LC resonant converter; switched-mode power supply (SMPS); wide output voltage; zero-voltage switching (ZVS);
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2011.2143429
Filename :
5751702
Link To Document :
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