施耐德产品140DAI34000C Quantum

140DAI34000C Quantum

140DAI34000C

　直流电机测量好坏，可以用万用表电阻档200档测量直流电机线圈电阻。如果有电阻说明线圈没有问题，如果电阻无穷大，说明线圈开路损坏。再用手旋转电机，如果感觉有明显较大的阻力，说明电机内部有短路点。

　　还可以用500v绝缘摇表测量三相绕组相间绝缘电阻和对地（对机壳）绝缘电阻，长期存放的电机各项绝缘电阻要0.5兆欧以上为好电机，可以使用。0.1兆欧以上不足0.5兆欧说明电机已经受潮，要烘干处理后才可以使用。绝缘电阻很低的说明绝缘已经损坏。

　　检查有无断线，测量电阻是否正常。如果是有刷直流电机，可以转动转子，用万用表测量输出直流电是否正常。如果是无刷直流电机，引出三相，可以转动转子，用万用表测量输出交流电压是否为正常。输出电压与转速成正比。

　　1.用手旋转直流电机。如果有一个明显的阻力，这意味着在电机，内部有短路点，所以平稳旋转是正常的。

　　2.连接正负极时，用手捻会有很大的阻力，说明线路正常。相反，里面有一个断点。

　　3.通电时观察反向火花。没有火花比较好，火花少就好，火花连成一条线就不好。如果出现环火现象，则不能使用。

　　4.直流电机运行到稳定升温后，电机地表温度不应超过80摄氏度。如果超过这个值，就意味着电机的气温上升无法通过。

　　5.当温度稳定上升时，停止机器，用万用表测量绕组电阻。一般十分之几到几欧姆。

　　6.在额定电压下，测量速度与标称速度之间的误差不应超过10%。

　　7.加1.2倍额定电压，运行2分钟，观察有无异常。

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