Detection of airgap eccentricity for permanent magnet synchronous motors based on the d-axis inductance
Detection of airgap eccentricity for permanent magnet synchronous motors based on the d-axis inductance
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DOI：
10.1109/tpel.2011.2176145
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发表时间：
2011-11
期刊：
影响因子：
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通讯作者：
Jongman Hong;Sang Bin Lee;C. Kral;A. Haumer
中科院分区：
文献类型：
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作者：
Jongman Hong;Sang Bin Lee;C. Kral;A. Haumer
检测永磁同步电机（PMSM）偏心故障的大部分工作都集中在电机电流特征分析（MCSA）上，因为它可以通过现有的电流传感器提供连续的在线监测。然而，MCSA不能应用在非平稳条件下，不能区分负载转矩振荡的故障，这是许多PMSM驱动应用的限制。在本文中，它是示出的d轴电感，Ld，由于磁饱和度的变化，偏心的严重程度的增加而减小，并提出作为一种新的故障指示器。逆变器可用于在电机停止时自动执行静止测试，以测量Ld，用于独立于负载变化或振荡的偏心测试，这在MCSA中是不可能的。通过对10马力永磁同步电动机的有限元分析和实验研究，验证了该方法具有较高的灵敏度和可靠性。
The majority of the work performed for detecting eccentricity faults for permanent magnet synchronous motors (PMSM) focus on motor current signature analysis (MCSA), as it provides continuous on-line monitoring with existing current sensors. However, MCSA cannot be applied under nonstationary conditions and cannot distinguish faults with load torque oscillations, which are limitations for many PMSM drive applications. In this paper, it is shown that the d-axis inductance, Ld, decreases with increase in the severity of eccentricity due to the change in the degree of magnetic saturation, and it is proposed as a new fault indicator. The inverter can be used to perform a standstill test automatically whenever the motor is stopped, to measure Ld for eccentricity testing independent of load variations or oscillations, which is not possible with MCSA. An FE and experimental study on a 10hp PMSM verifies that eccentricity can be detected independent of the load with high sensitivity and reliability.