Several practical methods in motor repair
5 Repair of the motor after the "and the hood"
After the winding type motor and the headgear break through the short circuit, the wire end is usually burned for a period of time, and the length of the wire can be used for repair. The specific method is as follows:
Use 1-2 250W infrared bulbs to locally soften the rotor end to release the gun, remove the copper foam, and then bend the burnt (flat) copper wire head slightly (for soldering). The length wire can be silver soldered or soldered. Care should be taken to protect the windings during welding to avoid burnout (protected with wet asbestos cloth (rope)). Flatten the weld after welding. After straightening the copper wire, wrap a layer of glass ribbon, apply insulating varnish, and dry it with an infrared bulb. When the wire is placed in the original position, a thin film of green paper is placed underneath, and then the excess portion of the copper wire is cut off, and the sleeve is placed and soldered. Finally paint at the repair site and dry. The hood is applied to the original size of the copper sheet, and the copper sheet should be tinned before production.
The motor with the headgear has a large capacity, and it is difficult to disassemble and install. The above method is suitable for on-site repair.
6 Demolition of the old winding of the motor
Generally, the soft windings must be baked before the wires are removed. However, for larger capacity motors, it is more difficult to soften and disconnect the wires, so the old windings can be removed by the following methods:
Use a flat spatula to remove one end of the winding and the cut is flush with the notch. The other end of the winding is cut with a metal scissors, and then the enameled wire in the groove is punched out with a suitable copper rod to clean the groove. If the copper rods are suitable and the method of operation is correct, the wires in each slot can be punched out together. When using the flat shovel, be careful not to smash the stator core.
When the line is removed by the above method, the drying process before the removal can be omitted, the time is saved, the electric energy is saved, and the disassembly is relatively labor-saving. However, this method is suitable for motors with a capacity of 7.5 KW or less. Since the casing of a small motor or a micromotor is small, it is inconvenient to operate using a flat shovel.
