Detection and Classification of Rotor Demagnetization and Eccentricity Faults for PM Synchronous Motors

被引:176
作者
Hong, Jongman [1 ]
Park, Sanguk [2 ]
Hyun, Doosoo [1 ]
Kang, Tae-june
Lee, Sang Bin [1 ]
Kral, Christian [3 ]
Haumer, Anton [3 ]
机构
[1] Korea Univ, Dept Elect Engn, Seoul 136713, South Korea
[2] Samsung Elect, Samsung Digital Appliance Motor Team, Suwon 442600, South Korea
[3] Austrian Inst Technol, Mobil Dept, A-1210 Vienna, Austria
关键词
Alternating-current (ac) machine; condition monitoring; d-axis inductance; demagnetization; eccentricity; magnetic saturation; permanentmagnet (PM); synchronousmotor (SM); MAGNET;
D O I
10.1109/TIA.2012.2191253
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Condition monitoring of rotor problems such as demagnetization and eccentricity in permanent-magnet synchronous motors (PMSMs) is essential for guaranteeing high motor performance, efficiency, and reliability. However, there are many limitations to the offline and online methods currently used for PMSM rotor quality assessment. In this paper, an inverter-embedded technique for automated detection and classification of PMSM rotor faults is proposed as an alternative. The main concept is to use the inverter to perform a test whenever the motor is stopped and to detect rotor faults independent of operating conditions or load torque oscillations, which is not possible with motor current signature analysis (MCSA). The d-axis is excited with a direct-current+alternating-current signal, and the variation in the inductance pattern due to the change in the degree of magnetic saturation caused by demagnetization or eccentricity is observed for fault detection. An experimental study on a 7.5-kW PMSM verifies that demagnetization and eccentricity can be detected and classified independent of the load with high sensitivity.
引用
收藏
页码:923 / 932
页数:10
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