Detection and identification of power switch failures for fault-tolerant operation of flying capacitor Buck-boost converters. (September 2018)

• Record Type: Journal Article
• Authors: Tang, Sai; Yin, Xin; Wang, Daming; Zhang, Chao; Shuai, Zhikang; Yang, Xin; Shen, Z. John; Wang, Jun
• Is Part Of: Microelectronics and reliability. Volume 88/90(2018)
• Page Start: 1236
• Page End: 1241
• Publication Date: 2018-09
• Subjects: Flying capacitor -- Switch failures -- Fault tolerant operation; Electronic apparatus and appliances -- Reliability -- Periodicals; Miniature electronic equipment -- Periodicals; Appareils électroniques -- Fiabilité -- Périodiques; Équipement électronique miniaturisé -- Périodiques; Electronic apparatus and appliances -- Reliability; Miniature electronic equipment; Periodicals; 621.3815
• DOI: 10.1016/j.microrel.2018.06.102
• Languages: English
• ISSNs: 0026-2714

Abstract

Abstract: Power switch failures have great influence for electronic converter. Prompt detection of power switch's failure and fault-tolerant operation of multilevel converters have extremely vital significance for high reliability electronic systems. The paper presents a new technique of detecting, identifying, and locating faults of switching devices in an N-Level Flying Capacitor Buck-Boost Converter (FCBBC). The characteristics of inductor current and flying capacitor voltage of FCBBC with different kinds of failure are analyzed. A new fault diagnosis algorithm is proposed to detect and identify the fault on basis of this information. Then the fault-tolerant operation method of the FCBBC is also discussed. The validity of the new control method is demonstrated in the control hardware by experiment result. Highlights: Summarizes the Changed trend of the circuit parameters of multilevel converter when power switches fail A new fault diagnosis algorithm with high precision and speed is proposed for a FCBBC Converters Reform the Flying Capacitor Buck-Boost Converters so that it can operate in the fault-tolerant state