How to measure the specifications of enameled wire? Specific measurement methods of enameled wire

How to measure the specification of enameled wire? The specific measurement method of enameled wire? Enameled wire is a kind of cable. The specification of enameled wire is expressed by the diameter of bare copper wire (unit is mm). The measurement of the enameled wire specification is actually the measurement of the diameter of the bare copper wire. It is generally used for micrometer measurement, and the accuracy of the micrometer can reach 0.01mm.

How to measure the specifications of enameled wire?

There are direct measurement methods and indirect measurement methods for the measurement of enameled wire specifications (wire diameter).

Direct measurement

The direct measurement method is to directly measure the diameter of the bare copper wire. It is necessary to burn off the varnish of the enameled wire first, and use the fire method. The wire diameter of the enameled wire used in the rotor of the series motor for electric tools is very small, and it needs to be burned many times for a short time when it is burned with fire, otherwise it may burn out and affect the efficiency. After burning, wipe the burnt paint with a cloth, and then measure the diameter of the bare copper wire with a micrometer. The diameter of the bare copper wire is the specification of the enameled wire.

The patent leather of the enameled wire can be burned with alcohol lamps or candles.

indirect measurement method

Indirect measurement method is to measure the outer diameter of enameled copper wire (including patent leather), and then according to the data of the outer diameter of enameled copper wire (including patent leather). This method does not need to use fire to burn the enameled wire patent leather, and has high efficiency. If you can know the specific model of the enameled copper wire, it is more accurate to check the enameled wire specifications (wire diameter).

PS:

It should be noted that no matter which method is used, different root numbers or parts must be measured 3 times to ensure accurate measurement. When the data of the three measurements are quite different, it may 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 differ greatly, it may also be caused by the time line not being straightened.

The direct measurement method is generally used for the measurement of the old wire (the winding is removed), and the indirect measurement method is generally used for the measurement of the new winding, which is more convenient and fast.

The specific measurement method of enameled wire?

Measuring tool: micrometer micrometer, accuracy O.002mm

When enameled round wire d<0.100mm, measuring force is 0.1～1.0N, when d≥0.100mm, measuring force is 1～8N; enameled rectangular wire measuring force is 4-8N.

outer diameter

(round wire) When the nominal diameter of the conductor d≤0.200mm, measure the outer diameter at 3 positions 1m apart, record 3 measured values, and take the average value as the outer diameter.

When the nominal diameter of the conductor d>0.200mm, at two locations 1m apart, measure the outer diameter three times along the circumference of each location, record 6 measured values, and take the average value as the outer diameter.

(flat line) measure the wide side and narrow side dimensions at 3 positions each 100mm apart, and take the average of the three measured values ​​as the overall dimensions of the wide side and narrow side.

Conductor size

(round wire) When the nominal conductor diameter d≤0.200mm, remove the insulation by any method that does not damage the conductor at 3 locations 1m apart and measure the conductor diameter one time: take the average value as the conductor diameter.

When the nominal diameter of the conductor d>O.200mm, remove the insulation by any method that does not damage the conductor, measure the three equally divided positions along the circumference of the conductor, and take the average of the three measured values ​​as the conductor diameter.

(Flat wire) At 3 positions each 10Omm apart, remove the insulation by any method that does not damage the conductor, measure the dimensions of the wide side and the narrow side respectively, and take the average of the three measured values ​​as the conductor size of the wide side and the narrow side .