Factors affecting thermal shock; (1) the influence of p […]
Factors affecting thermal shock; (1) the influence of paint, (2) the influence of copper wire, (3) the impact of enamelled technology. The softening breakdown function of the enameled wire is a measure of the ability of the paint film of the enameled wire to withstand the thermal deformation under the mechanical force effect, that is, the ability of the pressure-sensitive paint film to be plasticized and softened at a high temperature. The heat-resistant softening breakdown function of the enameled wire paint film is determined by the molecular structure of the paint film and the effect of the molecular chain.
Electrical function, including breakdown voltage: paint film continuity, DC resistance test.
The breakdown voltage refers to the ability of the voltage load accepted by the enameled wire paint film. The primary factors affecting the breakdown voltage: (1), film thickness: (2) film roundness, (3), degree of cure. (4) External impurities in the paint film.
Paint film continuity test is also called pinhole
Its primary influencing factors, (1) the impact of the original data: (2) the impact of operational technology: (3) the impact of equipment.
DC resistance is the measured resistance value per unit length.
Influence current resistance first: (1) degree of annealing, (2) enamel equipment.
4 chemical resistance: including solvent resistance, solderability.
Solvent-resistant function means that after the enameled wire is wound into a coil: the solvent in the impregnating varnish has a different degree of swelling effect on the paint film at a higher temperature. The chemical resistance of the enamelled paint film is determined by the characteristics of the paint film itself: under the certain conditions of the paint, the lacquer technology has a certain influence on the solvent resistance of the enameled wire.