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A Method of Improving the Inductance Coefficient of Air Gap Magnetic Core

A technology of inductance coefficient and air-gap magnetism, applied in the manufacture of transformer/inductor components, transformer/inductor core, inductor/transformer/magnet manufacturing, etc. The effect of inductance

Active Publication Date: 2016-08-03
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] 1) The disadvantage of the magnetic ring with closed magnetic flux is that it is difficult to wind;

Method used

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  • A Method of Improving the Inductance Coefficient of Air Gap Magnetic Core
  • A Method of Improving the Inductance Coefficient of Air Gap Magnetic Core
  • A Method of Improving the Inductance Coefficient of Air Gap Magnetic Core

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Effect test

Embodiment 1

[0059] Figure 4 It is the magnetic core of the first embodiment, which is a combined magnetic core formed by inserting four sets of EI type magnetic core slices. The size of E type is 8mm long, 1mm wide (thick), 2.8mm high, and the middle tongue width The size of the window is 2mm, the window width is 1.8mm, and the window height is 1.6mm; the size of the I type is 8mm in length, 1mm in width (thickness), and 1.2mm in height; the magnetic material comes from Tiantong Holdings Co., Ltd. TPW33, stacked thickness is 4mm.

[0060] Such as Figure 4 As shown, 1, 3, 5, and 7 are all I-type magnetic core sheets, while 2, 4, 6, and 8 are E-type magnetic cores. Among them, the 11 sides of the I-type magnetic core sheet 1 and the E-type magnetic core sheet The 21 faces of 2 are not mirror faces, but the 12 faces and 13 faces of the I-type magnetic core sheet 1 (the side that is symmetrical with the 11 faces cannot be seen in the figure, and the 12 faces Figure 4 The upper right of ...

Embodiment 2

[0070] Figure 4 It is the magnetic core of the second embodiment. The assembly method is the same as that of the first embodiment. The difference is that the 10-turn coil of the test transformer is wound with a high-strength enameled wire with a temperature resistance of 180°C. After the transformer is assembled, it is placed in the magnetic core. The curie temperature of TPW33 magnetic material is about 220°C. In order to prevent the variation of the enameled wire of the transformer, a high temperature of 175°C is used here. And the combined magnetic core is clamped from the upper and lower sides and left and right to facilitate the re-diffusion of the magnetic domain at high temperature. After the transformer is placed in a constant temperature box at 175°C for 2 hours, in order not to damage the transformer, the magnetic core used for comparison The mirror bonding force rises to 7N / cm 2 About; after taking it out and cooling it, the inductance measured at 0.1V and 10KHz i...

Embodiment 3

[0074] Figure 8 It is the magnetic core of the third embodiment, which is composed of two magnetic cores 37 and 38 with the same shape. The magnetic core 37 includes two 33 magnets, and 33 is a mirror magnet with a larger area, that is, it and the mirror magnet 34 of the magnetic core 38 The opposite surface is a mirror surface; the magnetic core 38 includes two 34 magnets, and the 34 is a mirror magnet with a larger area, that is, the surface opposite to the mirror magnet 33 of the magnetic core 37 is a mirror surface. Figure 7 The working principle of the third embodiment has been explained clearly. The parts indicated by 37 and 38 are the main body of the air-gap magnetic core, and the magnetic pressure drop inside it is very small, and the magnetic pressure drop is very large where there is an air gap. 33 and 34 are magnets with enlarged areas, they are integrated with the main bodies of 37 and 38 respectively, that is, there is no magnetic pressure drop, and there is an...

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Abstract

The invention discloses a method for improving the inductance coefficient of an air gap magnetic core. The air gap magnetic core is formed by combining more than two magnetic cores. The combined surface which magnetic flow passes comprises lateral surfaces, the mirror surface process is adopted for the lateral surfaces, and accordingly the inductance coefficient of the whole magnetic core can reach above 80%. Well wound windings are arranged on the magnetic core in an interdigitation mode and then are baked at a high temperature or are electrified on two magnetic cores for fusion, and accordingly the inductance coefficient of the magnetic core can be further improved. After adopting the method, the volume of a transformer or an inductor which is made of the magnetic core is small, and the winding process of the transformer or the inductor is simple.

Description

technical field [0001] The invention relates to a magnetic core, in particular to a method for increasing the inductance coefficient of an air gap magnetic core. Background technique [0002] Magnetic core: A magnetic core refers to a sintered magnetic metal oxide composed of various iron oxide mixtures. Magnetic cores have a wide range of uses. Since the 1980s, computer power supplies have fully realized switching power supplies, and they took the lead in completing the replacement of computer power supplies. In the 1990s, switching power supplies have successively entered the fields of various electronic and electrical equipment, program-controlled switches, Communications, electronic testing equipment power supplies, control equipment power supplies, etc. have widely used switching power supplies. In household appliances, such as color TVs, routers, and mobile phone charging, switching power supplies have been used for power supply. Rapid development. [0003] In so man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/26H01F27/245H01F41/02
Inventor 王保均
Owner MORNSUN GUANGZHOU SCI & TECH
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