High-power panel EMI filter

A filter and high-power technology, applied in the field of high-power flat-panel EMI filters, can solve the problems of inability to meet the requirements of the electromagnetic environment, poor filtering performance, poor reliability, etc., to solve the difficulty of winding, improve power and performance, To achieve the effect of magnetic shielding

Inactive Publication Date: 2019-04-02
北京航天微电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thick wires mean that the winding of the inductor is difficult, the number of turns is small, the filtering performance is poor, and the reliability is poor, which cannot meet the requirements of the electromagnetic environment for weapons and equipment and human survival.

Method used

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Embodiment Construction

[0035] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0036] Such as Figure 1-6 As shown, a high-power flat panel EMI filter provided by an embodiment of the present invention includes: a composite coil 1, a magnetic core 2, a case 3, a cover 4, a substrate 5, a first interference suppression circuit 61, and a second interference suppression Circuit 62;

[0037] The composite coil 1 is a disk-shaped structure made of two mutually insulated wires and has 4 pins, which are a first positive input terminal 111, a first negative input terminal 113, a first positive output terminal 122, and a first A negative output terminal 124, used to filter common mode interference and differential mode interference on the transmission line;

[0038] The magnetic core 2 is tubular and used for mag...

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Abstract

The invention relates to a high-power panel EMI filter. The high-power panel EMI filter comprises a compound coil, a magnetic core, a tube shell, a cover plate, a base plate, a first interference rejection circuit and a second interference rejection circuit, wherein the compound coil is a disk-shaped structure formed by two mutually insulating leads via winding; the magnetic core is tubular and the compound coil is penetrated into the magnetic ore; one end of the tube shell is an open and hollow metal shell; the magnetic core is fixed at the bottom of the cavity of the tube shell; the cover plate is a metal plate; and the base plate is a printed circuit board. The compound coil is made into a disk shape by mutually insulating leads via winding and is placed in the tubular magnetic core, sothat a high-power compound inductor for the filter is formed, magnetic shielding and relatively high magnetic flux are realized, the power and performance of the filter are enhanced, and the problemthat the high-power inductors are high in winding difficulty is solved.

Description

Technical field [0001] The invention relates to the technical field of filters, in particular to a high-power flat panel EMI filter. Background technique [0002] EMI (Electromagnetic Interference, electromagnetic interference) filters are mainly passive port networks composed of inductors, capacitors and other components. It allows DC or working frequency signals to pass, and has a greater attenuation effect on interference signals of other frequencies. EMI filters have become the first choice for modern weaponry and household appliances to solve electromagnetic interference problems. [0003] But in the design and application of EMI filters, high power and high performance mean large size. Especially in the power circuit, large current means that the wire used to wind the inductor should be thick. Thick wire means that the winding of the inductor is difficult, the number of turns is small, the filtering performance is poor, and the reliability is poor, which cannot meet the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F17/04H01F27/28H01F27/29H01F27/24H01F27/02H01F27/36H03H7/01
CPCH01F17/04H01F27/022H01F27/24H01F27/2823H01F27/2828H01F27/2847H01F27/29H01F27/36H03H7/0138
Inventor 冀兴军张中元边旭明王琦
Owner 北京航天微电科技有限公司
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