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Pressure Resistance of Enameled Wire


The automotive industry often requires enameled paint f […]

The automotive industry often requires enameled paint films to be thin but with high pressure resistance, taking the 0.71 m m Q(ZY/XY)-2/200 Enameled wire as an example. The pressure resistance of the enameled wire has a direct relationship with the film thickness. In general, for every 0.001 m of film thickness reduction, the breakdown voltage drops by 100 to 150 V. Therefore, in the case where the paint film is thin, in order to obtain a paint film having a high breakdown voltage, in addition to a reasonable insulation structure, the paint film itself must have good insulation properties. This means that the enameled wire lacquer must have a suitable molecular weight and a uniform molecular weight distribution in order to make the film uniform and free of defects; the enameled wire must also be finely filtered, free of gels and mechanical impurities, and have a reasonable solvent formulation. The enamelled wire lacquer can be cured smoothly without defects.

Enameled wire for sealed motor. Lubrication performance. Sealed motors are mostly produced on high speed winding equipment. The winding speed of the winding machine can be as high as 1400~1600 rpm. The enameled wire must also withstand a certain tension when winding. This requires that the surface of the enameled wire should have good wear resistance and slipperiness to avoid the enameled wire being thinned or crushed during winding and weaving.

In the past, the enamelled wire was commonly used as a surface lubricant. However, since the paraffin is easily precipitated from the refrigerant and causes clogging of the capillary in the refrigeration system, the surface of the enameled wire used for the refrigeration equipment is never allowed to exist in the paraffin-like substance. The solution to this problem is to apply a self-lubricating paint film to the surface of the enameled wire to make a self-lubricating enameled wire.