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高压电动机定子线圈内外腐蚀原因

陕西异步西玛电机资讯:正常情况下,高压电动机定子线圈的内外腐蚀主要是由于电动机运行过程中长期电磁振动、高温和高压造成电晕腐蚀机绝缘的振动磨损和热老化,导致线圈整体绝缘被剥除、分层、烧灼、磨损,绝缘强度降低,导致绝缘击穿等故障。高压电动机运行中产生的各种机械振动都会磨损和腐蚀线圈绝缘,其中最重要的是电磁振动对电动机末端绕组和槽口的影响。如果定制铁芯压装质量不好,缠绕断件的绑扎过程不好,线圈在槽中固定不好,导致大幅度振动,夹层垫片条和测温元件垫片条会在上下两层线圈之间来回移动,从而磨损上下两层线圈,损坏线圈的主绝缘。更严重的是,如果在线圈运行中流经导体的电流产生双频电磁振动力,线圈将不会与铁芯和绕组端部的间隔件一起振动。因此,电磁振动是高压电动机线圈主绝缘外部腐蚀和内部腐蚀损坏的主要原因。

Under normal circumstances, a high voltage motor stator winding of the inner and outer corrosion is mainly due to the long-term motor operation process electromagnetic vibration, high temperature and high pressure caused by corona corrosion machine vibration and wear of the insulation and thermal aging, and led to the strip coil insulation overall, layered, burning, wear and tear, dielectric strength is reduced, resulting in failure of insulation breakdown, etc. All kinds of mechanical vibration produced in the operation of high voltage motor will wear away and erode the coil insulation, the most important of which is the effect of electromagnetic vibration on the end winding and notch of the motor. If the quality of the customized iron core pressing is not good, the binding process of the wound broken piece is not good, and the coil is not fixed well in the groove, which results in a large vibration, the interlayer gasket strip and the temperature measuring element gasket strip will move back and forth between the upper and lower coils, thus wearing the upper and lower coils and damaging the main insulation of the coil. More seriously, if the current flowing through the conductor during the operation of the coil produces dual-frequency electromagnetic vibration, the coil will not vibrate with the iron core and the spacer at the end of the winding. Therefore, electromagnetic vibration is the main cause of external corrosion and internal corrosion damage of the main insulation of the high voltage motor coil.

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