Dc speed-down electric captain time need not, again enabled will find gear motor winding insulation resistance is reduced, especially in the rainy season, the air humidity is big, its insulation value even down to zero, then it should be on the dry processing, so that the insulation resistance, absorption than e., reaching the following to introduce several kinds of drying methods:

1. Welding machine drying method

1, ac welding machine drying operation before the first damp reducer motor winding connector series, chassis grounding, so that three groups of winding can achieve heating and drying, in order to monitor the drying process of the current change, can be connected to a ammeter, observe whether its current reaches the rated current of reducer motor. Using ac welder to dry dc reducer motor does not need to disassemble it, which reduces the workload. At the same time, the reducer motor heats up with its own resistance under the condition of electrification, so that the coil is heated evenly and the drying effect is better.

 

2, dc welding machine drying operation wiring and ac similar, the series ammeter should be dc ammeter. Dc welder can be used to dry large and medium speed motor and high voltage speed motor for a long time. In this way, when the welder works for a long time or with large current, its internal components will not be damaged due to the long time and large current, so it can be used for large and medium speed reduction. It is worth noting that when using these two methods to dry, all contacts must be in good contact and tight, the lead wire of the welding machine should use special wires, and the size of section should meet the carrying capacity of the output current of the welding machine. Note that welding transformer cooling, at the same time, to ensure that no reduction motor insulation resistance is lower than 0.1 M Ω. Also pay close attention to speed motor winding temperature timely adjustment of voltage and current.

 

Two, external heat source heating method

For the damp dc motor to be disassembled first, with high power incandescent bulb into the motor to bake, or put the motor into the oven to dry. This method is easy to operate, safe and reliable, but only suitable for small speed reduction motor easy to be disassembled. For large and medium-sized gear motor or not easy to overhaul workload is relatively large, but also reduces the feasibility. It should be noted that the bulb or heat source should not be too close to the coil during the operation of this method, to prevent the coil from being burnt out. Items such as canvas can be covered on the housing of the reducer motor for heat preservation.

 

 

The excitation coil drying method is to wind the excitation coil around the stator core of the decelerating motor, and supply alternating current to generate the stator flux, and dry the stator of the decelerating motor by relying on its iron loss