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Electromagnetic interference filter and manufacturing method

An electromagnetic interference and filter technology, which is applied in the electronic field, can solve the problems of increasing the use of electronic devices, increasing the size of filters, and difficulty in layout and wiring of filters, achieving the effects of reducing use, reducing size, and reducing difficulty in layout and wiring

Active Publication Date: 2015-05-27
HUAWEI MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the addition of series inductance on the differential mode capacitor, the use of electronic devices will be increased, the size of the filter will increase, and it will also bring difficulties to the layout and wiring of the filter.

Method used

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  • Electromagnetic interference filter and manufacturing method
  • Electromagnetic interference filter and manufacturing method
  • Electromagnetic interference filter and manufacturing method

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] An embodiment of the present invention provides an electromagnetic interference filter, such as figure 2 shown, including:

[0042] The first common-mode inductor L1, the second common-mode inductor L2, and the differential-mode capacitor Cx, the first common-mode inductor L1 includes a first inductor and a second inductor, and the second common-mode inductor L2 includes a third inductor and a fourth inductor The output end of the...

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Abstract

The invention discloses an electromagnetic interference filter and a manufacturing method. The electromagnetic interference filter comprises a first common mode inductor, a second common mode inductor and a difference mode capacitor (Cx), wherein the difference mode capacitor is arranged between the first common mode inductor and the second common mode inductor; the electromagnetic interference filter further comprises at least one magnetic permeability component; wherein the magnetic permeability component is fixed at the outer side of the difference mode capacitor (Cx), so that an integrated inductor is formed by the magnetic permeability component and the difference mode capacitor (Cx). With the adoption of the scheme, only the magnetic permeability component needs to be added without adding electronic components, so that the number of the electronic components is reduced, the size of the filter is reduced, and the layout wiring difficulty is reduced.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an electromagnetic interference filter and a manufacturing method. Background technique [0002] First, the terms to be involved in the embodiments of the present invention are collectively explained as follows: EMI (Electromagnetic Interference, electromagnetic interference); ESR (Equivalent Series Resistance, equivalent series resistance); ESL (Equivalent Series Inductance, equivalent series inductance); CE (Conduction Emission, conducted interference); common mode inductor: an inductor used to filter out EMI common mode noise; common mode capacitor: a capacitor used to filter out EMI common mode noise, the connection method is that one end of the capacitor is connected to a port line, The other end is connected to the protective ground; each port line has at least one common-mode capacitor connection; differential-mode inductance: an inductor used to filter EMI differentia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/01H03H3/007
Inventor 陈庆彬宋清亮
Owner HUAWEI MACHINERY
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