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A potent power supply filter

A power filter and power port technology, which is applied in harmonic reduction devices and AC networks to reduce harmonics/ripples, etc., can solve the problems of poor suppression of differential-mode noise, and improve the suppression of differential-mode noise and improve the effect Effect

Inactive Publication Date: 2014-02-19
CHENGDU SYNSMART TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, provide a powerful power supply filter, and solve the shortcoming of the prior art that the differential mode noise suppression effect is poor

Method used

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  • A potent power supply filter

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Embodiment Construction

[0018] Below in conjunction with embodiment the present invention is described in further detail, but structure of the present invention is not limited to following embodiment:

[0019] 【Example】

[0020] Such as figure 1 As shown, the powerful power filter includes a power port, a load port, a common mode circuit, a differential mode circuit and two RC filter circuits, and the common mode circuit includes a filter choke coil LC and a common mode capacitor C Y1 、C Y2 , the differential-mode circuit includes a differential-mode capacitor C X1 、C X2 And the differential mode choke coil LD, the input of the filter choke coil LC is connected to the power port, the input terminal of the differential mode choke coil LD is connected to the output terminal of the filter choke coil LC, and the differential mode capacitor C X1 Connected in parallel to the input end of the filter choke coil LC, the differential mode capacitor C X2 connected in parallel to the output of the different...

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Abstract

The invention discloses a potent power supply filter comprising a power supply port, a load port, a common-mode circuit, a differential mode circuit and two RC filter circuits. The common-mode circuit comprises a filtering choke coil LC, a common-mode capacitor CY1 and a common-mode capacitor CY2. The differential mode circuit comprises a differential mode capacitor CX1, a differential mode capacitor CX2, and a differential mode choke coil LD. The beneficial effect of the potent power supply filter of the present invention is that: through the addition of the differential mode choke coil, the effect of suppressing differential mode noises is improved.

Description

technical field [0001] The invention relates to a filter for filtering various EMI noises in a power supply, in particular to a powerful power supply filter. Background technique [0002] With the rapid development of modern science and technology, electronics, power electronics, and electrical equipment are used more and more widely. The high-density, wide-spectrum electromagnetic signals generated during their operation fill the entire space and form a complex electromagnetic environment. The complex electromagnetic environment requires electronic equipment and power supplies to have higher electromagnetic compatibility. Therefore, the technology of suppressing electromagnetic interference is getting more and more attention. Grounding, shielding and filtering are the three major measures to suppress electromagnetic interference. The following mainly introduces the EMI filter used in the power supply, its basic principle and correct application method. [0003] The power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 徐晓青
Owner CHENGDU SYNSMART TECH DEV
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