Common mode inductor resistant to high breakdown voltage and stable in performance

Abstract

The invention discloses a common mode inductor resistant to high breakdown voltage and stable in performance, comprising a circular magnet core. An insulating sheet is surrounded in the magnet core and arranged along the diameter of the magnet core, a first enameled wire and a second enameled wire are oppositely wound on the magnet core on two sides of the insulating sheet, adjacent ends of the first and second enameled wires are fitted as an input terminal, other adjacent ends of the first and second enameled wires are fitted as an output terminal, and the periphery of each of the magnet core, the insulating sheet, the first enameled wire and the second enameled wire is provided with a protective layer by dipping; the protective layers can effectively maintain the form of the first and second enameled wires wound into a coil and maintain constant inductance of the common mode inductor with the protective layers rarely dropping, the high insulation, compactness, damp and heat resistance, salt and mist resistance and mold resistance features of the protective layers can improve environmental applicability of the common mode inductor, the provided insulating sheet can improve the breakdown voltage stably to above 3000V, and the breakdown voltage of the common mode inductor is raised.

Description

technical field [0001] The invention relates to the technical field of electronic components, in particular to a common-mode inductor with high breakdown voltage resistance and stable performance. Background technique [0002] The common mode inductor is a passive bidirectional network, which is widely used in the input and output terminals of electronic equipment, especially the input and output terminals of power signals. The common mode inductor is set on one input terminal and one output terminal. When in use, connect the input terminal to the live wire and neutral wire of AC or the positive and negative poles of DC, and the output terminal is used to output electric energy. When the common-mode interference signal flows from the input terminal to the output terminal or from the output terminal to the input terminal, this will cause a pair of magnetic induction intensities with opposite directions and the same magnitude to be generated inside the magnetic core on the coi...

AI Technical Summary

Problems solved by technology

When the common-mode interference signal flows from the input terminal to the output terminal or from the output terminal to the input terminal, this will cause a pair of magnetic induction intensities with opposite directions and the same magnitude to be generated inside the magnetic core on the coil inside the common-mode inductor, that is, common Mode choke coil, the pair of signals will cancel each other, so as to suppress the common mode interference in the signal, but the existing common mode inductor has a single structure, and there is no protective device between the two sets of coils, so the breakdown voltage resistance Low, there is no protective layer around the coil, and it is easily affected by external forces, resulting in changes in the coil structure and peeling off of the coil's insulating paint, and poor performance stability

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