1. Understand the basic data of the motor before dismantling, check the quality of the motor, understand the winding principle of the motor, voltage, current, power, wiring method, number of poles, speed, and use a multimeter to detect whether the winding resistance value is in the normal value scale, and whether the resistance to the ground, that is, the insulation resistance is qualified.
2. Dismantle the machine, do a good job of recording the sequence and position of each component device, judge the cause of burnout according to the burnout of the winding, record the wiring method of the junction box before dismantling, the device position of the shell body and make a mark, some of the body device position has directionality and can not be installed wrong, after dismantling the visual inspection of the cause of coil burnout, there are local interphase short circuits, inter-turn short circuits, short circuits of the lead wires, single-phase starting windings burned out, running windings burned out, three-phase is a phase burned out or three-phase all burned out, The cause of the damage to the coil can be determined from the burnout condition of the coil.
3. To disassemble the winding, the wiring method of the winding, the position of the lead wire, the insulation condition, the number of slots, the number of coil poles, the type of wire diameter, the number of turns, the span of each turn, the length of the stator core and the inner diameter scale should be recorded in detail.
4. Winding embedding wire: first determine whether to use a single or multiple enveloped wire according to the type of wire diameter, no matter how many wires are used and winding, the sum of the cross-sectional area must be common or very close to the original wire type (refer to error plus or minus 0.02mm). The length of the wire mold should be appropriate, it is not good to get off the line if it is short, it is not beautiful when it is long, and the coil simply touches the shell. Cut the insulating paper, winding the wire, and take off the line. Pay attention to the action of the offline line, do not damage the enameled wire skin insulating varnish, avoid causing inter-turn short circuit, and use insulating paper to block the phase to avoid interphase short circuit, pay attention to the direction of the offline line to be common. The wiring is according to the method recorded when the wire is removed, and the joint needs to be welded and insulated with an insulating sleeve. The whole line, the wire is tied, and the need to pay attention to ensure that the rotor does not touch the coil when it is assembled.
5. Dip in insulating paint, dry, and after the winding coil is tied, first use a megaohm shake meter to measure the insulation resistance to ensure that there is no problem with the insulation, and then pour the insulating paint and put it in the oven to dry.
6. Device motor, check the winding drying condition, insulating paint is not sticky, insulation resistance is greater than 0.5 trillion ohms, the device should be disassembled in reverse order, the need to replace the parts to be maintained, to deal with the device after processing, such as bearings, ball clearance large demand replacement, each repair requires refueling and maintenance, the device is very important, to ensure that each component is outstanding, the device is in place.
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