Device and method for detecting integrity of paint film of enameled wire

Abstract

The invention discloses a device and a method for detecting the integrity of a paint film of an enameled wire. The device comprises a test circuit (11) and a detection container (12) containing a non-toxic liquid conductive medium (13), the non-toxic liquid conductive medium (13) is used for immersing the to-be-tested enameled wire (15); and the test circuit (11) is used for applying an excitation signal to the to-be-tested enameled wire 15 and detecting whether the excitation signal is generated in the non-toxic liquid conductive medium 13. According to the detection device and method, the enameled wire to be detected can be immersed in the non-toxic liquid conducting medium, and whether the paint film is complete or not is determined by detecting whether the excitation signal is generated in the non-toxic liquid conducting medium or not, so that at least one defect existing in a paint film detection scheme in the related technology can be overcome.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular to an enameled wire paint film integrity detection device and method. Background technique [0002] Enameled wire has a wide range of applications, such as motor windings, cables, electronic products and household appliances, etc. are inseparable from enameled wire. The production process of enameled wire mainly includes two links: conductor metal wire drawing and paint film insulating material coating. The electrical performance of enameled wire mainly depends on its insulation, while the insulation depends on the quality of the paint film. Generally speaking, the better the integrity of the paint film, the higher the insulation performance of the enameled wire, on the contrary, the worse the insulation performance of the enameled wire. During the production and application of enameled wire, it is inevitable that the paint film will be damaged or incomplete. For exa...

AI Technical Summary

Problems solved by technology

During the production and application of enameled wire, it is inevitable that the paint film will be damaged or incomplete. For example, "pinholes" or paint film discontinuity will appear during the paint film coating process. Stress such as bending or twisting causes the paint film to break, so that the metal conductor of the enameled wire is exposed, resulting in a decrease in the insulation performance of the enameled wire

[0003] A variety of enameled wire paint film integrity detection schemes have been proposed in the related art, but these schemes have some defects more or less, for example, the salt water used in the salt water pinhole method will cause damage to the paint film, and it is difficult to realize online detection; The voltage contact method is difficult to achieve full contact between the enameled wire paint film and the voltage, resulting in the paint film on the uncontacted part not being detected, so the detection effect is not good; the mercury in the voltage mercury method is a toxic substance, which will cause environmental pollution and endanger occupational health; The actual operation of the partial discharge method is difficult. If the electric field is too large, it will easily cause breakdown. If the electric field is too small, the detection effect will be poor. It is practical, but it does not have practical application effects, etc.

Images