济南电机维修 http://www.kdjdwx.com/专家，告诉你迅速判断电机好坏的方法。

1.用万用表测量电机三相绕组的直流电阻，三次测量的结果越接近越好，在2%以内绕组电阻合格，相差10%以上时，电阻小的一相可能发生了匝间短路。
1.The DC resistance of the three-phase winding of the motor is measured by the universal meter. The result of the three measurement is close to the better, and the winding resistance of the 2% is qualified, the resistance is small, and a phase of the turn to turn short circuit can occur when the resistance is less than 10%.

2.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。
2.The insulation resistance of the three-phase windings and the insulation resistance of the ground (on the casing) are measured by the 500V insulation shake table, and the insulation resistance of the motor is 0.5, which is better than MB for a long time. 0.1 less than 0.5 MB of Europe that the motor has been affected with damp, to dry before you can use. The insulation resistance is very low, which indicates that the insulation is damaged.

3.转动电机转子，应该轻松自如，并且没有杂音和摩擦声，说明轴承和气隙正常。
3.Rotary motor rotor, it should be relaxed and comfortable, and there is no noise and friction sound, bearing and air gap normal.