Three differences between repairing variable frequency motors and repairing ordinary motors
Due to the special nature of the variable frequency power supply, the winding insulation of the variable frequency motor is stricter than that of the ordinary motor. For details, let Xiaobian bring everyone to have a look!
First, select a magnet wire with good corona resistance to meet the requirements of high frequency pulse and partial discharge.
Polyimide imide/polyamide imide composite layer enameled wire is generally used, which is resistant to corona and corona resistance.
Second, the winding, inlay construction process.
The processing technology of the variable frequency motor in winding, weaving, tying and so on must be strictly managed, especially in the process of winding and weaving to prevent damage to the wire. The weaving process should ensure that the slot insulation, phase insulation and interlayer insulation are placed in place. Phase insulation should be made of materials that are easily impregnated with insulating varnish. The ends of the coil should be reinforced and fixed to ensure that the ends are integrated.
Insulation is reinforced at the bottom of the motor slot, between phases, between the layers, and at the end of the coil to improve the electrical strength of the motor.
3. The main insulation shall be insulated without air gap.
The air gap in the insulation structure of the variable frequency motor is the main factor for generating corona. In order to ensure that the overall insulation structure of the motor does not contain air gap, according to the national standard GB/TZ1707-2008 "Insulation specification for three-phase asynchronous motor for variable frequency speed regulation", the impregnating paint for the three-phase asynchronous motor for variable frequency speed regulation must be It is lower than Class F solvent-free paint and has a volatile content of less than 10%, and adopts VPI process. The process also improves the overall mechanical strength of the insulation structure.
If you want to buy a vacuum cleaner motor, please pay attention to Vacuum Cleaners Motor.
