Sometimes the situation of the dc motor controller will be unable to start, this will make many feel very troubled. So why is this case? By the below small make up for you answer. Lack of power, may be the power switch didn't together, before the fuse fuse, fuse fusing, motor controller main circuit contactor power control devices such as failure, and so on and so forth. Handling: we need to fuse level began to once upon a time, one by one check to the motor controller all the parts of the main circuit and control circuit conductor and device, find out the cause of the failure, and then to repair. Motor controller failure: it could be worn dc motor controller, jam, spring pressure is not enough reason, let the brush and commutator poor contact, disconnect the armature winding and field winding broken there is no residual magnetism. Processing method: disconnect the power supply, using a multimeter to check, check the contact resistance between the brush and commutator segment, at both ends of the winding resistance. If it is found that resistance value is large, then there is a fault, need further inspection, repair and find out the breakpoint. Above is the cause of the dc motor controller cannot be started, everyone can understand understand.
