What causes the DC motor to fail to start?

hit count: Updated: 2017-12-25 13:22:12 [ close ] share:

    What causes the DC motor to fail to start?

    1.DC motor failure

    Possible situations: severe brush wear, jamming, insufficient spring pressure, etc. make the brush and commutator poor contact. The armature winding is open. The field winding is disconnected and there is no residual magnetism. The processing method is to disconnect the power supply, and use a multimeter resistance file to check the contact resistance between the brush and the commutator and the resistance at the ends of each winding. If the resistance value is very large, it indicates that the fault exists, and then further check to find the breakpoint and repair it.

    2.DC motor power is missing

    Possible situations: For example, the power switch is not closed, the front fuse is blown, the fuse of the motor main circuit or the control circuit is blown, the power control device such as the contactor fails, and the line wire is broken or loose. The solution is to start from the front fuse, and gradually check the wires and components of the main circuit and control circuit of the motor to find out the cause and repair it.

    3.Mechanical failure

    The mechanical equipment or transmission mechanism of the DC motor is stuck, and the starting load is too heavy. At this time, the power should be cut off quickly to find the mechanical fault.


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