低压船用电动机绝缘与绕组热保护

摘要

讲述低压船用三相异步电动机绝缘与绕组热保护。介绍了电机用防潮加热带、PTC热敏电阻、热电阻PT100和热电偶在低压船用三相异步电动机上的安装、测量及使用方法。明确电动机在潮湿环境下，绝缘电阻低时防潮加热带的作用，并阐述电机绕组热保护的控制原理以及电机线圈及轴承温度测量的方法和意义。%Insulation of the low voltage marine motor and thermal protection of its winding was described. Instal-lation, measurement and operation of the moisture-proof heating tape, PTC thermistor, thermal resistance PT100 and thermocouple in the low voltage marine three-phase asyn-chronous motor were introduced. The effect of the moisture-proof heating tape in condition that the motor operating under the moist environment was determined. The motor winding overheat protection control principle as well as the motor coil and bearing temperature measurement methods and significance were also discussed.