Common mode filter insulation resistance test method capable of improving accuracy

Abstract

The invention provides a common mode filter insulation resistance test method capable of improving accuracy. The method comprises the following steps of: a common mode filter preparation step, namely,preparing a common mode filter, wherein the common mode filter is provided with a first inductor to be tested and a second inductor to be tested; a comparison resistor connection step, namely, connecting a comparison resistor to a diagonal point of the common mode filter; an insulation resistance meter connection step, namely, connecting an insulation resistance meter to the other diagonal pointof the common mode filter, which is connected with the comparison resistor; and a measurement and comparison step, namely, measuring an insulation resistance value by the insulation resistance meter.According to the invention, whether the common mode filter is a qualified product is judged by the obtained insulation resistance value, so that not only can the situations of missing connection and faults be effectively measured, but also the effect of improving the accuracy can be achieved.

Description

technical field [0001] The invention relates to a method for testing insulation resistance of a common-mode filter, in particular to a method for testing the insulation resistance of a common-mode filter that can improve accuracy. Background technique [0002] Insulation resistance testing methods generally used for common mode filters, please refer to figure 1 As shown, it is mainly provided with a common mode filter 1, and the common mode filter 1 is provided with a first inductance to be measured 11, a second inductance to be measured 12, and the first inductance to be measured 11 is provided with a first end 13, The second end 14, and the second inductance 12 to be measured is provided with a third end 15 and a fourth end 16, the second end 14 of the first inductance to be measured 11 is connected to the fourth end 16 of the second inductance to be measured 12 It can be measured by an insulation resistance meter 2 so as to achieve the performance of the insulation resis...

AI Technical Summary

Problems solved by technology

[0003] Although this general insulation resistance test method can measure the insulation resistance of the common-mode filter 1, when the measured object is connected to the insulation resistance meter 2, it often results in a common-mode failure of the insulation resistance due to inaccurate contact connection. Filter 1 is misjudged as normal, resulting in inaccurate test results of its products, resulting in the installation of common-mode filter 1 with unqualified insulation resistance on the product, thus causing adverse effects of equipment damage

Images