Influencing Parameters on Discharge Bearing Currents in Inverter-Fed Induction Motors
Influencing Parameters on Discharge Bearing Currents in Inverter-Fed Induction Motors
复制标题
影响逆变感应电机放电轴承电流的参数
DOI：
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发表时间：
2021
影响因子：
4.9
通讯作者：
B. Nahid
中科院分区：
文献类型：
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作者：
Thibaud Plazenet;T. Boileau;C. Caironi;B. Nahid
本文研究了逆变器供电电动机的放电轴承电流。工业报告表明，在普遍的轴承故障中，轴承电流是导致轴承中各种摩擦学问题和过早磨损的影响因素之一。多年来，虽然轴承电流的根本原因已被广泛报道，但对电压应力下轴承的响应以及通过放电影响轴承危害的因素的研究却少得多。提出了一种在电机试验台上在线测量轴承电压的方法，以估计放电活动和放电能量。设计的试验台允许再现代表性的轴承电流导致电气微点蚀。本文提出了广泛的测量结果，突出了关键的操作条件和参数，恶化了轴承内的放电现象。执行测试方案以分别量化每个参数的影响。虽然轴承电压幅值在放电现象中起着重要作用，但其他参数（如连续启动、轴承温度和润滑脂类型）值得进行适当的研究，以避免或减轻逆变器运行下众所周知的轴承寿命缩短。
This article investigates discharge bearing currents in inverter-fed electric motors. Industrial reports indicate that among prevalent bearing failures, bearing currents are one of the influent drivers leading to a variety of tribological issues and premature wear in bearings. While the root-causes of bearing currents have been extensively reported over the years, the response of bearing under voltage stress and the factors that influence bearing endangerment through electric discharges have been far less studied. An online measurement of the bearing voltage is proposed on a motor test-bench to estimate both the discharge activity and the energy of the discharges. The designed test bed allows reproduction of representative bearing currents leading to electrical micropitting. This paper presents extensive measurements results that highlight the critical operating conditions and parameters that worsen the discharge phenomenon inside bearings. Testing protocols are performed to quantify the influence of each parameter separately. While the bearing voltage magnitude play a significant role in the discharge phenomenon, other parameters such as successive startups, bearing temperature, and type of grease deserve appropriate investigations to avoid or mitigate the well-known shortened bearing life under inverter operation.