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首页> 外文会议>Annual Conference of the IEEE Industrial Electronics Society >Online insulation condition monitoring of traction machines using inverter induced voltage injection
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Online insulation condition monitoring of traction machines using inverter induced voltage injection

机译：逆变器感应电压注入在线监测牵引机的绝缘状态

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摘要

Stator insulation defects in the machine winding of traction drives can be analyzed by evaluating the current response resulting to inverter induced voltage injection. Due to effects occurring during the aging of the insulation, e.g. change of parasitic electrical components, deviations of the high frequency components of the current response can be monitored. The insulation degradation of a stator winding system is a long developing process and usually takes place over a long period. With the proposed method stator insulation degradation can be detected already at an incipient stage by comparing the high frequency transient current response of the drive system from the first initial startup with continuous measurements during operation. No additional current transducers are necessary than the transducers already applied for the control of the machine. Investigations are conducted with a 1.4 MW induction machine designed for a traction application having form-wound coils equipped with fiber-insulated winding taps and a silicon carbide voltage source inverter enabling high dv/dt rates of up to 25kV/μs. Additionally, in order to investigate insulation degradation of the stator winding system, results of measurements of a form wound coil specimen are presented.
机译：可以通过评估由逆变器感应的电压注入导致的电流响应来分析牵引驱动器的电机绕组中的定子绝缘缺陷。由于绝缘老化期间发生的影响，例如寄生电气元件的变化，可以监测电流响应的高频成分的偏差。定子绕组系统的绝缘退化是一个漫长的发展过程，通常会持续很长时间。使用所提出的方法，通过将驱动系统从首次启动开始的高频瞬态电流响应与运行期间的连续测量值进行比较，就可以在初期就检测出定子绝缘性能的下降。除了已经用于控制机器的传感器之外，不需要其他电流传感器。使用用于牵引应用的1.4 MW感应电机进行了调查，该电机具有带纤维绝缘绕组抽头的绕线线圈和碳化硅电压源逆变器，可实现高达25kV /μs的高dv / dt速率。此外，为了研究定子绕组系统的绝缘性能下降，提出了绕制线圈样品的测量结果。

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