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Transient state and stable state resisting combination interference power filter and design method thereof

A power filter and combined interference technology, which is applied in the fields of power filter, protection, and power filter, can solve the problems of inability to suppress power surge interference, performance impact, and large size at the same time, and achieve perfect protection functions, fast response speed, small size effect

Inactive Publication Date: 2010-08-04
XIAN KAIRONG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of the existing filters are steady-state filters, they can only suppress the steady-state interference of the power supply, but cannot suppress the surge interference of the power supply at the same time. Usually, for occasions that need to satisfy both transient and steady-state interference suppression, a Install a transient protector
For electronic devices with limited internal space, on the one hand, the volume is too large, and on the other hand, due to the distribution parameters of the interconnection structure, the performance is greatly affected

Method used

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  • Transient state and stable state resisting combination interference power filter and design method thereof
  • Transient state and stable state resisting combination interference power filter and design method thereof
  • Transient state and stable state resisting combination interference power filter and design method thereof

Examples

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Effect test

Embodiment 1

[0019] Embodiment 1: as figure 2 As shown, the anti-transient and steady-state combined interference power filter filter circuit includes a common mode inductor L 1 , a differential mode capacitor CX, and two common mode capacitors CY, characterized in that three high-intensity and high-sensitivity TVS tubes are also provided at the input end of the power filter. The specific circuit structure is: a high-strength, high-sensitivity TVS tube is the input end of the filter, and a high-strength high-sensitivity TVS tube is connected to the ground (line-ground) on L and N respectively, and the length of the pins at both ends of the TVS tube is Between 0.3mm and 0.6mm; connect a high-sensitivity TVS tube in parallel between L and N (line-line) (generally, the strength of the TVS tube installed on the line-line is slightly lower than that installed on the line-ground, and the details can be determined according to The strength of the TVS tube is 1.5KE100CA ~ 1.5KE800CA (the strengt...

Embodiment 2

[0020] Embodiment 2: as image 3 As shown, the anti-transient and steady-state combined interference power filter filter circuit includes a common mode inductor L 1 , two differential mode inductors L 2 , three differential-mode capacitors CX, and four common-mode capacitors CY, characterized in that three high-intensity and high-sensitivity TVS tubes are also provided at the input end of the power filter. The specific circuit structure is: a high-strength, high-sensitivity TVS tube is the input end of the filter, and a high-strength high-sensitivity TVS tube is connected to the ground (line-ground) on L and N respectively, and the length of the pins at both ends of the TVS tube is Between 0.3mm and 0.6mm; connect a high-sensitivity TVS tube in parallel between L and N (line-line) (generally, the strength of the TVS tube installed on line-line is slightly lower than the TVS tube installed on line-ground, and the details can be determined according to The strength of the TVS ...

Embodiment 3

[0021] Embodiment 3: as Figure 4 As shown, the anti-transient and steady-state combined interference power filter filter circuit includes two common-mode inductors L 1, two differential-mode capacitors CX, and four common-mode capacitors CY, characterized in that three high-strength and high-sensitivity TVS tubes are also provided at the input end of the power filter. The specific circuit structure is: a high-strength, high-sensitivity TVS tube is the input end of the filter, and a high-strength high-sensitivity TVS tube is connected to the ground (line-ground) on L and N respectively, and the length of the pins at both ends of the TVS tube is Between 0.3mm and 0.6mm; connect a high-sensitivity TVS tube in parallel between L and N (line-line) (generally, the strength of the TVS tube installed on the line-line is slightly lower than that installed on the line-ground, and the details can be determined according to The strength of the TVS tube is 1.5KE100CA ~ 1.5KE800CA (the st...

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Abstract

The invention relates to a power filter in a power filtering and protection technique, in particular to a transient state and stable state resisting combination interference power filter and a design method thereof. The power filter is characterized by at least comprising protection circuits and filter circuits, wherein the protection circuits are connected with the filter circuits in series; the filter circuits are packaged in a filter shell, which has a nickel-plated surface and is made of cold-rolled steel plates, at a constant temperature through epoxy resin; the filter circuits are type A, type U, type D and type F filter circuits; and the protection circuits are provided with TVS tubes on line-line and line-ground of input ends of the filter circuits respectively to form a line-line and line-ground transient protection module. The transient state and stable state resisting combination interference power filter not only has good common mode and difference mode filtering performance, but also can effectively inhibit surge interferences on a power line, and is particularly suitable for various types of direct current electronic devices having high requirements on CS116.

Description

technical field [0001] The invention relates to a power filter, which belongs to power filter and protection technology, in particular to an anti-transient and steady-state combined interference power filter and a design method thereof. Background technique [0002] On the power supply of electronic equipment, there are not only various external electromagnetic interference, but also electromagnetic interference generated during its own work. These electromagnetic disturbances affect electronic equipment operating in the environment through conduction and radiation. These disturbances are mainly divided into two categories: one is the steady-state disturbance caused by the operation of the switching tube, and the other is the surge disturbance produced when the large load in the power grid is turned off. In order to suppress these two types of interference at the same time, on the basis of having a good steady-state interference suppression circuit, a power filter that supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02H9/04
CPCY02E40/40
Inventor 邱扬任琦宋博
Owner XIAN KAIRONG ELECTRONICS TECH
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