Interturn Short Fault Diagnosis Using Magnitude and Phase of Currents in Permanent Magnet Synchronous Machines

被引:2
作者
Jeong, Hyeyun [1 ]
Lee, Hojin [1 ]
Kim, Seongyun [1 ]
Kim, Sang Woo [1 ]
机构
[1] POSTECH, Dept Elect Engn, 77 Cheongam Ro, Pohang 37673, Gyeongbuk, South Korea
基金
新加坡国家研究基金会;
关键词
permanent magnet synchronous machines; diagnosis; fault detection; interturn fault; fault current; SHORT-CIRCUIT FAULT; SEVERITY ESTIMATION; PMSM; DRIVE; MOTOR;
D O I
10.3390/s22124597
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
With the increased demand for permanent magnet synchronous machines (PMSMs) in various industrial fields, interturn short fault (ITSF) diagnosis of PMSMs is under the limelight. In particular, to prevent accidents caused by PMSM malfunctions, it is difficult and greatly necessary to diagnose slight ITSF, which is a stage before the ITSF becomes severe. In this paper, we propose a novel fault indicator based on the magnitude and phase of the current. The proposed fault indicator was developed using analysis of positive-sequence current (PSC) and negative-sequence current (NSC), which means the degree of the asymmetry of the three-phase currents by ITSF. According to the analysis, as ITSF increases, the phase difference between PSC and NSC decreases and the magnitude of NSC increases. Therefore, the novel fault indicator is suggested as a product of the cosine value of the phase indicator and the magnitude indicator. The magnitude indicator is the magnitude of NSC, and the phase indicator means the phase difference between the PSC and the NSC. The suggested fault indicator diagnoses the degree of ITSF as well as slight ITSFs under various conditions by only measured three-phase currents. Experimental results demonstrate the effectiveness of our proposed method under various torque and speeds.
引用
收藏
页数:16
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