Open-Circuit Fault Diagnosis and Fault-Tolerant Strategies for Full-Bridge DC-DC Converters

This paper proposes a four-step open-circuit fault diagnosis and fault-tolerant scheme for isolated phase-shifted full-bridge (PSFB) dc-dc converters to improve the reliability. The fault diagnostic method utilizes the primary voltage of the transformer as the diagnostic criterion, which can be obta...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power electronics Vol. 27; no. 5; pp. 2550 - 2565
Main Authors: Pei, Xuejun, Nie, Songsong, Chen, Yu, Kang, Yong
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.05.2012
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Active-phase-shifted (APS)
Applied sciences
Circuit faults
Circuit properties
Circuits
Control systems
Converters
Convertors
Diagnostic systems
Digital signal processing
Electric currents
Electric potential
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical machines
Electronic circuits
Electronics
Exact sciences and technology
Fault diagnosis
Fault tolerance
Fault tolerant systems
fault-tolerant
Faults
open circuit
reliability
Signal convertors
Switches
Testing, measurement, noise and reliability
Testing. Reliability. Quality control
Voltage
Winding
Windings
Waveform
fault diagnosis
Machining
Implementation
Fault tolerance
Trigger
Output voltage
Selector switch
Fault tolerant system
fault-tolerant
Bridge convertor
Machine windings
Open circuit
Voltage transformer
Primary winding
Phase shift
Control system
Direct current convertor
Open fault
Experimental study
Active-phase-shifted (APS)
Diagnostic aid
Reliability
Fault diagnostic
Defect detection
ISSN:0885-8993, 1941-0107
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper proposes a four-step open-circuit fault diagnosis and fault-tolerant scheme for isolated phase-shifted full-bridge (PSFB) dc-dc converters to improve the reliability. The fault diagnostic method utilizes the primary voltage of the transformer as the diagnostic criterion, which can be obtained easily by adding an auxiliary winding. When an open-circuit fault occurs in any switch of the PSFB converter, the proposed fault detection method can generate an indication of the abnormal state and trigger an active-phase-shifted in the control system. Under the APS state, it is very easy to locate the exact position of faulty switch because the voltage waveform of the primary winding heavily depends on the location of the faulty switch. After locating the position of the faulty switch, the PSFB converter is reconfigured into an asymmetrical half-bridge (AHB) converter by turning ON the normal switch in the faulty leg and adding a redundant winding to the secondary side. Therefore, the rebuilt AHB converter can keep the output voltage constant under a reduced power rating after the open-circuit fault. The operational principle, design consideration, and implementation are discussed in this paper. The experimental results are given to verify the validity of theoretical analysis. The proposed strategies outperform the traditional schemes in terms of cost, reliability, and power density.
Bibliography:SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 14
ObjectType-Article-2
content type line 23
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2011.2173589