Choking coil and manufacture method thereof

Abstract

The invention relates to a choking coil and a manufacture method of the choke coil, and discloses a choking coil including a magnetic core and a winding. The magnetic core comprises a bottom, a center column arranged on the bottom and wound by the winding, at least two lateral sides keeping contact with the periphery of the bottom in a manner of being substantially parallel to the center column, and a neck arranged on the upper end in a manner of contacting the lateral sides. In addition, the saturation magnetic flux density of the magnetic material adopted by the center column is larger thanthat of the magnetic material adopted by the lateral sides, and the cross section area of the center column is correspondingly smaller than that of the lateral sides. A closed magnetic core structureis formed by reasonably splicing the magnetic cores with different magnetic materials based on the material properties. Accordingly, the choking coil provided by the invention breaks through the conventional choking coil having a magnetic core made of a single magnetic material, and has the advantages of uniform air gap distribution, high flexibility in regulating length and area of an effective magnetic path, low external electromagnetic interference, and so on.

Description

technical field [0001] The invention relates to the field of inductive device manufacturing, in particular to a choke coil that plays the roles of choke, energy storage, filter, etc. in electronic circuits and power circuits and a manufacturing method thereof. Background technique [0002] The main components of a choke coil are the magnetic core and the winding. Among them, the magnetic materials that can be used to make magnetic cores include silicon steel, nanocrystalline, soft ferrite, metal magnetic powder cores, etc. Different magnetic materials have their own characteristics in different frequency bands and different use environments. The wires that can be used to make windings include silk-covered wires, enameled wires, flat copper wires, copper skins, etc. Different wires have certain temperature resistance levels and insulation levels. [0003] High-power choke coils need to have a large operating current, so there should be a large air gap in the magnetic circuit...

AI Technical Summary

Problems solved by technology

However, due to the difficulty of the can-shaped forming process, it is not conducive to mass production, and it is difficult to realize larger-sized can-shaped magnetic cores

In addition, in the case of using copper foil to make the winding to achieve high current, it is difficult to handle the lead wires wound with copper foil in the pot core

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