NDLI: Hybrid phase shifted full bridge and LLC half bridge DC–DC converter for low-voltage and high-current output applications

Content Provider	IET Digital Library
Author	Yu, Mengyuan Sha, Deshang Liao, Xiaozhong
Abstract	A hybrid phase shifted full bridge (PSFB) and LLC half bridge (HB) DC–DC converter for low-voltage and high-current output applications is proposed in this study. The PSFB shares its lagging leg with the LLC-HB and their outputs are parallel connected. When the output current is small, the energy of LLC circuit in combination with the energy stored in the leakage inductance of PSFB's transformer can help the lagging leg switches to achieve zero voltage switching (ZVS) turn on, which can reduce voltage stress and avoid annoying voltage spikes over switches. For the power distribution at rated power, the PSFB converter undergoes most of the power whereas the LLC-HB converter working as an auxiliary part converts only a small portion of the total power. To improve the conversion efficiency, synchronous rectification technique for the PSFB DC–DC converter is implemented. The design principle is given in view of ZVS for lagging leg switches and low transconductance of LLC converter. The validity of the proposed converter has been verified by experimental results of a 2.5 kW prototype.
Starting Page	1832
Ending Page	1840
Page Count	9
ISSN	17554535
Volume Number	7
e-ISSN	17554543
Issue Number	Issue 7, Jul (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/7/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2013.0778
Journal	IET Power Electronics
Publisher Date	2014-03-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analogue Circuit Bridge Circuit DC-DC Power Converter Energy Storage Harmonics High-current Output Application Hybrid Phase Shifted Full Bridge DC-DC Converter Inductors And Transformer Lagging Leg Switch Leakage Inductance LLC Half Bridge DC-DC Converter LLC-HB Converter Low-voltage Output Application Phase Shifter Power 2.5 KW Power Distribution Power Electronics Power Supply Power Supply Quality PSFB Rectification Relay And Switches Supervisory Circuit Switched Mode Converter Switching Converter Synchronous Rectiflcation Technique Transformer Transformer And Reactors Voltage Spike Voltage Stress Reduction Zero Voltage Switching ZVS
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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