Phase Current Digital Analysis of Power Converter for Freewheeling Diode Fault Diagnosis on Switched Reluctance Motor Drive

Autor:	Jinlong Dong, Hao Chen, Xianqiang Shi, Guoqiang Han
Rok vydání:	2019
Předmět:	business.industry Computer science Electrical engineering Flyback diode Fault (power engineering) Signal Switched reluctance motor DC-BUS Power (physics) Control and Systems Engineering Power semiconductor device Electrical and Electronic Engineering Current (fluid) business Excitation
Zdroj:	IEEE Transactions on Industrial Electronics. 66:6613-6624
ISSN:	1557-9948 0278-0046
DOI:	10.1109/tie.2018.2889628
Popis:	Power converter is critical but prone to be failure in switched reluctance motor (SRM) drives. The open- and short-circuit fault characteristics of freewheeling diode in asymmetric bridge power converter are analyzed in details. Based on logic judgment, four online fault diagnostic methods with digital phase current analysis of power converter are proposed in this paper. The fault features are extracted by analyzing the relationship between chopping signal and the current information from some special positions. The four fault diagnostic methods are carried out according to the current obtained by detecting dc bus current and the lower freewheeling bus current, the chopped bus current, the upper excitation bus current and lower freewheeling bus current, the lower excitation bus current, and dc bus current, respectively. Comparisons between the four diagnostic methods are conducted. Simulations and experiments on a 12/8 SRM validate the effectiveness of the proposed methods.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4b9919b5d74701a2b6012bca47000ffb https://doi.org/10.1109/tie.2018.2889628 Zobrazit plný text záznamu