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Switch Open Fault Diagnosis of Inverter Using Features of dq Currents  

Kwak, Nae-Joung (Dept. of Electronics Eng. Hanbat National University)
Hwang, Jae-Ho (Dept. of Electronics Eng. Hanbat National University)
Hong, Won-Pyo (Dept. of Building Service Eng. Hanbat National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.48, no.1, 2011 , pp. 31-38 More about this Journal
Abstract
Faults of motor drive systems to be used for various industrial applications can cause serious problems. In this paper, a method to diagnose switch open fault of a voltage-fed PWM inverter is proposed. The proposed method normalizes dq current and fault-detection and first classification are performed by mean values of dq phase currents, second classification is performed by features such as the relation of dq phase currents, the ranges of those, the positions of those according to the results, and fault switch is diagnosed with the results. The proposed method performs the simulation for diagnosis of inverter switch open faults with MATLAB and identifies the feasibility of the proposed method. Because the proposed method is implemented by simple algorithms, the proposed algorithm can be embedded in general induction motor drive systems and be used.
Keywords
fault diagnosis; inverter; dq current; switch;
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