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近年来,我国牵引电动机匝间耐压试验逐步采用了“绕组冲击法”。它的原理是先把充电后的电容,通过放电开关接通被测绕组,以冲击电流直接作用于绕组上,利用“形成脉冲”的瞬时大电流的高变化率,在绕组匝间产生足够高的检测电压。检测显示信号直接取自绕组匝间。它在准确、可靠、实用及经济性上都较以往的“片间压降”、“空载发电机电压”、“中频发电机组试验”等方法,有明显的优越性。
In recent years, China’s traction motor inter-turn pressure withstand test gradually adopted the “winding impact method.” Its principle is to first charge the capacitor through the discharge switch connected to the measured winding, the impact of current directly on the winding, the use of “pulse” instantaneous high current high rate of change, in the winding turn to produce high enough The detection voltage. Detection showed that the signal directly from the winding turns. It is more accurate, reliable, practical and economic than the previous “chip pressure drop”, “no-load generator voltage”, “IF generator test” and other methods, there are obvious advantages.