A Three-Leg-Based Full-Bridge Converter With Wide Input Voltage Range

Traditional phase-shift full-bridge converters are popular in industrial applications due to the advantages of simple design, fixed-frequency control and soft switching. However, a large duty cycle variation range is required in applications with a wide input voltage range, which can cause loss of s...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 69; no. 6; pp. 5690 - 5699
Main Authors Chen, Guipeng, Zhou, Yihan, Ding, Zinan, Zeng, Jin, Huang, Lantao
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Bridge circuits
Capacitors
Conduction losses
DC–DC converter
Electric converters
Electric potential
Frequency control
Industrial applications
phase-shift modulation
Ripples
Soft switching
Switches
Switching
Transformers
Voltage
Voltage control
wide input voltage range
Zero current switching
Zero voltage switching
zero-voltage and zero-current switching (ZVZCS)
Online AccessGet full text

Cover

More Information
Summary:Traditional phase-shift full-bridge converters are popular in industrial applications due to the advantages of simple design, fixed-frequency control and soft switching. However, a large duty cycle variation range is required in applications with a wide input voltage range, which can cause loss of soft switching range, excessive circulating currents and output current ripple. This article introduces a three-leg converter that is a hybrid combination of two full-bridges. The current and power of the two transformers in the converter are shared automatically by adopting the symmetrical structure and modulation, and output current ripple is suppressed by the superposition of the two transformer voltages. The circulating current is minimized in the proposed converter that the conduction loss is reduced. By adding two auxiliary switches on the secondary side, zero-voltage switching and zero-current switching of all switches can be achieved to maintain high efficiency in a wide range. An experimental prototype rated at 1 kW is designed to convert 220-460 V input to 100 V output. The experimental results show that the proposed converter can achieve high efficiency over a wide input voltage and load range.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2021.3090703