Enamelled wire is widely used in motor and transformer equipment at present. There are many factors to judge the quality of enamelled wire. The key is to see the continuity of enamelled wire paint film, that is, to detect the number of pinholes of enamelled wire paint film under a certain length. The number of pinholes on the paint film can largely reflect the quality of the enameled wire. The less the number of pinholes detected, the higher the integrity of the paint film of the enameled wire and the better the use effect. On the contrary, the quality of the enameled wire will be greatly reduced. So how do we check the number of pinholes of enameled wire in practice?
Generally, we will use a strict paint film continuity tester to check the number of pinholes of the enameled wire. This test mainly uses the high-pressure discharge principle to contact the electromagnetic wire with the high-pressure concave wheel through half envelope. When the paint film thickness is not enough or there are serious bare copper defects, the instrument will respond and record the specific number of defects. In this way, we can see the number of pinholes in this section of enameled wire.
Therefore, when purchasing enamelled wire, we should also pay attention to checking the number of pinholes of enamelled wire, so as to help us judge the quality of enamelled wire, which is also very useful for our use.