NDLI: Hybrid full-bridge and LLC converter with wide ZVS range and less output inductance

Content Provider	IET Digital Library
Author	Lin, Bor Ren Chu, Chung Wei
Abstract	This study presents a new hybrid full-bridge and LLC converter with the features of low circulating current loss, wide zero voltage switching range and less output inductance for industry power units. The proposed hybrid circuit has two full-bridge converters and one LLC converter with shared lagging-leg switches. Two full-bridge converters, shared the same lagging-leg switches, are operated at phase-shift pulse-width modulation to regulate the output voltage and share the load power. Half-bridge LLC converter is added at the lagging-leg switches to extend the zero voltage switching range of lagging-leg switches from zero to full load. The output voltage of LLC converter is connected to the secondary sides of two full-bridge converters during the freewheeling interval to eliminate the circulating current loss. The rectified voltage of full-bridge converter during the freewheeling stage is positive instead of zero so that the output filter inductance can be reduced. Finally, experiments with a 1440 W prototype circuit converting 380 V input to an output voltage 24 V/60 A are provided to verify the theoretical analysis and effectiveness of the proposed converter.
Starting Page	377
Ending Page	384
Page Count	8
ISSN	17554535
Volume Number	9
e-ISSN	17554543
Issue Number	Issue 2, Feb (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/9/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2014.0991
Journal	IET Power Electronics
Publisher Date	2016-02-10
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bridge Circuit Circulating Current Loss Elimination Control of Electric Power System Current 60 A Freewheeling Interval Half-bridge LLC Converter Hybrid Full-bridge Converter Industry Power Units Load Power Sharing Other Power Apparatus And Electric Machine Output Filter Inductance Reduction Output Voltage Regulation Phase-shift Pulse-width Modulation Power 1440 W Power Converter Power Filter Power Supplies to Apparatus PWM Power Converter Shared Lagging-leg Switches Voltage 24 V Voltage 380 V Voltage Control Wide Zero Voltage Switching Range Wide ZVS Range Zero Voltage Switching
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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