Magnetic core

A magnetic core and toroidal core technology, applied in the field of magnetic integration, can solve the problems of complex production and assembly processes, loss of the inherent function of the magnetic core, and further rise, and achieve the effects of simple structure, easy processing and prolonging service life.

Active Publication Date: 2012-07-04
MORNSUN GUANGZHOU SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2. The production and assembly process is relatively complicated
from figure 2 , image 3 It can be seen that the inductance L N The magnetic core with the same size as the power transformer B is used, and both have such a high temperature. If the inductance L is reduce

Method used

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Example Embodiment

[0047] Figure 4 It is a perspective view of the first embodiment of the present invention. Below with Figure 4 Take the first embodiment as an example to illustrate the independence of the magnetic line of force between the transformer or common mode inductance and the inductance, Image 6 for Figure 4 The top view of , the arrow 61 is a schematic diagram of the diameter of the magnetic ring, the arrow 61 extends out of the magnetic material along the direction of the arrow 62, and along the diameter of the annular magnetic core, a cylindrical magnetic column of the same material extends outward from the outer surface of the closed magnetic core without an air gap. , you can achieve Figure 4 of the first embodiment. A coil is wound on the magnetic core to realize the integrated device of the transformer and the inductor, see Figure 7 , where 71 is one winding of the transformer, 72 is the other winding of the transformer, and 73 is the inductance; Figure 7 It is al...

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Abstract

The invention discloses a magnetic core which comprises an air-gap-free closed-magnetic-circuit magnetic core, wherein the external surface of the air-gap-free closed-magnetic-circuit magnetic core is provided with one or more than one same-material cylindrical magnetic column extending outwards; the air-gap-free closed-magnetic-circuit magnetic core is an annular magnetic core, and the cylindrical magnetic column extends outwards along the diameter direction of the annular magnetic core; alternatively, the air-gap-free closed-magnetic-circuit magnetic core is an annular magnetic core, and the cylindrical magnetic column extends outwards along the direction perpendicular to the diameter direction of the annular magnetic core. The magnetic core can be applicable to a self-excited push-pull type transformer with output short circuit protection function, so that magnetic lines of force between the transformer or a common-mode inductor and an inductor are independent and are not mutually influenced; magnets of the same material are magnetically integrated, and the magnetic core is formed through one set of moulds and is easy to machine during production, and the product has high conformance; and the magnetic core is integrally manufactured by using the same mould and has good heat transfer effect.

Description

technical field [0001] The invention relates to the field of magnetic integration technology, in particular to a magnetic core used in a power converter. Background technique [0002] Existing power converters, in order to pursue higher power density, that is, under the same volume, power converters can achieve greater output power, have begun to develop towards magnetic integration; on the other hand, in order to achieve good electromagnetic compatibility , Magnetic integration technology has also begun to be used for common mode inductors and differential mode inductors to reduce the volume. Common mode Choke (Common mode Choke), also known as common mode choke coil, is also called conjugate inductor in some documents, and is often used to filter common mode electromagnetic interference signals in switching power supplies. In fact, common mode inductors are just a form of transformer. In its most basic form, a transformer consists of two sets of coils wound with wire and...

Claims

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Application Information

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IPC IPC(8): H01F27/24H01F41/02H01F27/30
Inventor 王保均
Owner MORNSUN GUANGZHOU SCI & TECH
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