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一、概述直流电机在使用中常常会发生绝缘电阻下降以及泄漏电流增加的现象。其主要原因是直流电机中导体有较大的裸露区域,如:转子连接铜排、升高片、换向器、转子线圈等、定子上的换向极线圈和补偿线圈的连接线、引出线等。在运行中,由于来自电刷上的炭质微粒,灰尘以及导电微粒,随空气进入裸露区域,粘附到各部件上,形成低电阻通道,使表面电阻下降。多孔性绝缘材料,尤其容易嵌入导电微粒,引起介电强度的降
First, an overview of DC motor often occur in the use of insulation resistance drop and the leakage current increases phenomenon. The main reason is the direct current motor conductor has a larger exposed area, such as: rotor connection copper row, raising film, commutator, rotor coil, etc., the stator commutation pole coil and compensation coil connection line, pinout Wait. In operation, due to the carbon particles from the brush, dust and conductive particles, with the air into the exposed area, adhesion to the various components, the formation of low-resistance channels, the surface resistance decreased. Porous insulating materials, in particular, are easily embedded in conductive particles, causing a drop in dielectric strength