Dc motor controller maintenance knowledge sharing

When the dc motor controller used in the long run, will appear this or that kind of problem, how are we going to solve? Below small make up to simple said the dc motor controller can't start the reasons and treatment methods. General cause of dc motor controller can't play has: power supply voltage, excitation circuit disconnect, brush circuit disconnect, have power but the motor not turn to wait for a few kinds. To this end, we adopt the method are: inspection on power supply and fuse. Inspection on field winding and starter; The armature winding and commutator brush contact inspection; Inspection on the armature, starting equipment.