Method and device for on-line withstand voltage detection of film sintered electromagnetic wire

Abstract

The invention provides a method and a device for on-line withstand voltage detection of a film sintered electromagnetic wire, wherein an insulation tank is arranged at the leading-out terminal of the film sintered electromagnetic wire, the tank therein is filled with conducting liquid medium, the film sintered electromagnetic wire passes through the conducting liquid medium in the insulation tank; the conducting wire before winding and sintering is used as an earth electrode, the conducting liquid medium is switched in a high voltage so as to form voltage at the two insulation sides of the electromagnetic wire; a leakage current detecting and alarming device is led out from the conducting liquid medium and connected with a remote control system through a network interface; when the electromagnetic wire has bare wire, burrs, film damage and incomplete film sintering, leakage current is generated, and when the leakage current exceeds the alarm leakage current set by the leakage current detecting and alarming device, the leakage current detecting and alarming device alarms and stops.

Description

technical field [0001] The invention relates to a detection method and device for electrical materials, in particular to an online withstand voltage detection method and device in the process of film sintering electromagnetic wire processing. Background technique [0002] In the production of thin-film sintered magnet wire products, if there are burrs on the surface of the bare wire, the film is likely to be punctured by the burr, resulting in damage to the film; in addition, the phenomenon of insufficient sintering of the film will affect the final insulation performance of the product. Therefore, it is necessary to carry out on-line withstand voltage testing during the processing of thin film sintered electromagnetic wires; at present, electromagnetic wire manufacturers mainly use traditional off-line withstand voltage testing or steel ball method on-line testing for the insulation performance of products when producing thin film sintered wires. [0003] Although the test ...

AI Technical Summary

Problems solved by technology

[0003] Although the traditional off-line withstand voltage detection method is relatively accurate, the test results cannot truly reflect the product quality level due to the small sample space.

[0004] Compared with the traditional off-line withstand voltage detection method, the steel ball method can better reflect the product quality level. However, due to the point contact between the steel ball and the product, it cannot be completely detected due to the influence of the steel ball size and other factors. Insulation weakness due to bare wire burrs, film damage, and incomplete film sintering

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