Low-cost diagnostic method for open-switch faults in inverters

被引：26

作者：

An, Q. T. ^{[1
,2
]}

Sun, L. Z. ^{[1
]}

Sun, L. ^{[1
]}

Jahns, T. M. ^{[2
]}

机构：

[1] Harbin Inst Technol, Dept Elect Engn, Harbin 150001, Heilongjiang, Peoples R China

[2] Univ Wisconsin, Wisconsin Elect Machines & Power Elect Consortium, Dept Elect & Comp Engn, Madison, WI 53706 USA

来源：

ELECTRONICS LETTERS | 2010年 / 46卷 / 14期

关键词：

SYSTEMS; DRIVE;

D O I：

10.1049/el.2010.0611

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];

摘要：

The theory, design, implementation and experimental validation of a novel low-cost online diagnosis and location method for open-switch faults in voltage source inverters is presented. According to the analysis of the operating states in inverters, there are different collector-emitter voltages of the bottom power switches in faulty conditions compared with normal conditions. To reduce cost, the proposed method employs high-speed photocouplers to sense voltages of the bottom switches, and then a sample logic circuit is designed to implement the detection and location of the fault. The developed approach minimises the time interval between the fault occurrence and its diagnosis, and is validated by the experiment.

引用

页码：1021 / U90

页数：2

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