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首页> 外文期刊>IEEE Transactions on Power Electronics >Online Monitoring of Incipient Turn Insulation Degradation for Inverter-Fed Machine Using Sensitive Tail Component in PWM Switching Oscillations
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Online Monitoring of Incipient Turn Insulation Degradation for Inverter-Fed Machine Using Sensitive Tail Component in PWM Switching Oscillations

机译：在PWM开关振荡中使用敏感尾部敏感机器的初始旋转机器初期扭转机器的在线监测

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摘要

A failure of insulation is one of the main reasons for electric machine outage. Online condition monitoring (CM) of an incipient degradation of turn insulation could eliminate the potential fault at the early stage, which is attractive but challenging. To improve the sensitivity and availability of CM, a noninvasive technique is presented in this article for the inverter-fed electric machine utilizing the existing high-frequency (HF) switching oscillations during pulsewidth modulation operation. First, the tail component sensitive to turn insulation is selected among the dominant oscillation modes in switching current, which can penetrate the winding of machine within an adequate frequency band (e.g., several hundreds of kHz). Then, a noncontact and simple HF sensor is developed for switching oscillation current capture. The CM system, procedure, and turn insulation state indicator are devised. After that, experimental work is carried out on a 3-kW permanent magnet synchronous machine test rig. The results show good sensitivity (about 2%) to the local incipient degradation of turn insulation with insusceptibility to the operating conditions. Finally, further discussion is given to demonstrate the performance of the method.
机译：绝缘失败是电机中断的主要原因之一。在线状态监测（CM）初期劣化的初期绝缘可能会消除早期阶段的潜在故障，这是有吸引力但具有挑战性的。为了提高CM的灵敏度和可用性，本文在该制品中提出了一种非侵入性技术，用于在脉冲宽度调制操作期间利用现有的高频（HF）切换振荡的逆变器供给电机。首先，在开关电流中的主导振荡模式中选择尾部对旋转绝缘的尾部部件，这可以穿透足够的频带内的机器的绕组（例如，数百kHz）。然后，开发了一种非接触和简单的HF传感器，用于切换振荡电流捕获。设计了CM系统，过程和转向绝缘状态指示灯。之后，实验工作是在3千瓦永磁同步机试验台上进行的。结果表现出良好的敏感性（约2％）到局部初期初期的转向绝缘的局部初期劣化，无需操作条件。最后，提供了进一步讨论来证明该方法的性能。

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