Enameled wire is a kind of cable. The specification of […]
Enameled wire is a kind of cable. The specification of round enameled wire is expressed by the diameter of the bare copper wire (in millimeters). The measurement of the enameled wire specification is actually the measurement of the diameter of the bare copper wire. Usually used for micrometer measurement, the accuracy of the micrometer can reach 0.01mm.
There are direct measurement methods and indirect measurement methods for the measurement of enameled wire specifications (wire diameter).
The direct measurement method is to directly measure the diameter of the bare copper wire. The varnish of the enameled wire must be burned first, and then the fire method must be used. The wire diameter of the enameled wire used in the rotor of the electric tool series motor is very small, and it needs to burn many times in a short time when it catches fire, otherwise, it may burn out and affect the efficiency. . After burning, wipe the burned paint with a cloth, and then measure the diameter of the bare copper wire with a micrometer. The diameter of bare copper wire is the specification of enameled wire. The patent leather of the enameled wire can be burned with an alcohol lamp or a candle.
The indirect measurement method is to measure the outer diameter of the enameled copper wire (including the paint), and then according to the outer diameter data of the enameled copper wire (including the paint). The method does not need to burn the enameled wire patent leather with fire and has high efficiency. If you know the specific model of enameled copper wire, it is more accurate to check the enameled wire specifications (wire diameter).
It should be noted that no matter which method is used, three different root numbers or positions must be measured to ensure accurate measurement. When the data of the three measurements are completely different, it can be used in parallel, which requires careful analysis. No matter which method is used, the wire must be straightened before measurement to ensure accurate measurement. When the three measurement data are very different, it may also be caused by the timeline not being straightened. The direct measurement method is usually used for the measurement of the old wire (removing the winding), and the indirect measurement method is usually used for the measurement of the new wire, which is more convenient and faster.