CN212783077U - Filter capacitor structure and filter with same - Google Patents
Filter capacitor structure and filter with same Download PDFInfo
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- CN212783077U CN212783077U CN202021349966.3U CN202021349966U CN212783077U CN 212783077 U CN212783077 U CN 212783077U CN 202021349966 U CN202021349966 U CN 202021349966U CN 212783077 U CN212783077 U CN 212783077U
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Abstract
The utility model provides a filter capacitor structure and have wave filter of this filter capacitor structure, the filter capacitor structure includes: one or more three-terminal capacitors, a first terminal of each three-terminal capacitor being connected; the second end of each three-end capacitor is connected with the shell; and the third end of each three-end capacitor is connected with the signal cable, and the signal cable penetrates through the shell. The filter capacitor structure can prevent electromagnetic radiation from leaking, the shell can be connected with equipment, the signal cable is used for signal transmission of the equipment, the electromagnetic radiation can be absorbed or reflected by the shell, the electromagnetic radiation is prevented from leaking from the equipment or leaking from the signal cable, and the use safety of the equipment is improved.
Description
Technical Field
The utility model relates to an electronic equipment field especially relates to a filter capacitor structure and have wave filter of this filter capacitor structure.
Background
At present, a filter mostly adopts the working principle of alternating current and direct current filtering, in order to reduce electromagnetic radiation, an input part and an output part of the filter are arranged on two sides of a shielding body, and the size of equipment with high frequency, high power, portability and the like is limited due to the requirements of portability and miniaturization of the filter, so that the input part and the output part of the filter cannot be arranged on two sides of the shielding body, and the electromagnetic radiation generated by the filter is leaked from an input line or a hole of the shielding body.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings in the prior art, an object of the present invention is to provide a filter capacitor structure and a filter having the same for solving the problem of electromagnetic radiation leakage of the filter in the prior art.
To achieve the above and other related objects, the present invention provides a filter capacitor structure, including: the first end of each three-terminal capacitor is connected with a signal cable to be filtered; the second end of each three-end capacitor is connected with the shell; and the third end of each three-end capacitor is connected with the signal cable, and the signal cable penetrates through the shell.
Optionally, the housing is further provided with a flange, a bolt or a buckle for connection.
Optionally, the extending direction of the housing is the same as or parallel to the extending direction of the signal cable.
Optionally, the three-terminal capacitor includes an inner electrode and an outer electrode, the inner electrode includes the first terminal and the third terminal, and the outer electrode includes the second terminal.
The filter with the filter capacitor structure comprises: a shield unit for mounting a device, the shield unit including one or more connection holes for connecting the filter capacitor structure; one or more of the filter capacitor structures, the filter capacitor structures are detachably connected with the connecting holes.
The mathematical expression of the filter with the filter capacitor structure on the earth leakage current is as follows:
Iid＝UC*2πf*C
wherein, IidIs the earth leakage current, UCThe voltage on the three-terminal capacitor, f is the voltage frequency, and C is the capacitor of the filter capacitor structure.
A filter having the filter capacitor structure includes: a plurality of said filter capacitor structures; the shielding body unit comprises a first shielding body and a second shielding body, the first shielding body and the second shielding body are detachably connected, the first shielding body and the second shielding body are respectively provided with a connecting hole for connecting the filter capacitor structure, and the filter capacitor structure is detachably connected with the connecting hole.
Optionally, the shield unit further includes a cavity for accommodating and mounting a device, and the device is connected to the first shield or the second shield.
Optionally, the filter capacitor structure further includes a nut, the filter capacitor structure penetrates through the connection hole, and the nut is connected to the connection hole.
Optionally, the shield unit further includes a coaxial connector disposed at a position corresponding to the connection hole.
As described above, the utility model discloses a filter capacitor structure and have wave filter of this filter capacitor structure has following beneficial effect:
the filter capacitor structure can prevent electromagnetic radiation from leaking, the shell can be connected with equipment, the signal cable is used for signal transmission of the equipment, the electromagnetic radiation can be absorbed or reflected by the shell, the electromagnetic radiation is prevented from leaking from the equipment or leaking from the signal cable, and the use safety of the equipment is improved.
Drawings
Fig. 1 is a schematic diagram of a filter capacitor structure according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a filter having the filter capacitor structure according to another embodiment of the present invention.
Fig. 3 is a schematic diagram of a filter having the filter capacitor structure according to another embodiment of the present invention.
Description of reference numerals
10 three terminal capacitor
20 casing
30 signal cable
1 device shield Unit
2 device connection hole
3 filter output connecting hole
4 Filter Shield Unit
5 filter capacitor structure
6 wave filter input cable
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
Please refer to fig. 1 to 3. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated. The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Referring to fig. 1, the present invention provides a filter capacitor structure, including:
one or more three-terminal capacitors 10, wherein the first terminal of each three-terminal capacitor 10 is connected;
the second end of each three-terminal capacitor is connected with the shell 20;
and a signal cable 30, to which the third terminal of each three-terminal capacitor is connected, the signal cable penetrating the housing. In the implementation process, the housing 20 can be connected with a device, the signal cable 30 is used for signal transmission of the device, the generated electromagnetic radiation can be absorbed or reflected by the housing, the electromagnetic radiation is prevented from leaking from the device or leaking from the signal cable, and the use safety of the device is improved.
In order to facilitate the assembly or installation of the filter capacitor structure with the device, the filter capacitor structure may be detachably connected with the device, for example, the housing 20 is further provided with a flange, a bolt or a fastener for connection.
In order to facilitate signal transmission, the housing 20 extends in the same direction as or in parallel with the signal cable 30.
In some implementations, the three-terminal capacitor includes an inner electrode including the first terminal and the third terminal and an outer electrode including the second terminal, the inner electrode being connected to two wires, the outer electrode generally serving as a ground line. When the three-terminal capacitor is used, the outer electrode is directly arranged on the metal panel in a nut mounting or welding mode, and the shell of the three-terminal capacitor is connected with the metal panel within the range of 360 degrees, so that the connection inductance is very small, and the three-terminal capacitor has ideal filtering characteristics; the signal cable to be filtered is connected to both ends of the core wire.
Referring to fig. 2, the filter having the filter capacitor structure includes: a shield unit for mounting a device, e.g. a filter shield unit 4, said shield unit comprising one or more connection holes for connecting said filter capacitor structure, e.g. a filter output connection hole 3; one or more of the filter capacitor structures 5, wherein the filter capacitor structures 5 are detachably connected with the connecting holes. The filter input cable 6 is in signal connection with the filter capacitor structure 5, the filter capacitor structure 5 penetrates through the filter shielding body unit 4, electromagnetic radiation is prevented from leaking from a connecting hole or a cable, the filter input cable 6 outputs a signal outwards from the filter output connecting hole 3, the output signal can be directly connected with equipment, or the output signal is connected with the equipment through the output cable.
In some implementation processes, in order to avoid the safety risk caused by the overlarge floor drain current of the filter capacitor structure, the following setting may be adopted, for example, the mathematical expression of the floor drain current when the internal filter capacitor of the filter is selected is:
Iid＝UC*2πf*C
wherein, IidIs the earth leakage current, UCThe voltage on the three-terminal capacitor, f is the voltage frequency, and C is the capacitor of the filter capacitor structure. E.g. UCThe voltage drop of 200V on the three-terminal capacitance Cy1 and Cy 2; f is 50 Hz; c ═ 2 Cy; if the leakage current I is satisfiedid0.5 mA; the capacitance values of Cy1 and Cy2 should satisfy: cy1 ═ Cy 2; and due to Iid＝Iidcy1+Iidcy2And Iidcy1＝Iidcy2Thus:
Iidcy1＝Iidcy2＝1/2Iid＝0.5/2＝0.25mA
C＜Iidcy1/(Uc*2πf)＝0.25/(2π*50*200)＝40nF
referring to fig. 3, a filter having the filter capacitor structure includes: a plurality of said filter capacitor structures 5; shield unit 4, the shield unit includes first shield and second shield, first shield with the connection can be dismantled to the second shield, is convenient for place relevant device or equipment in the shield unit, is convenient for assemble and use, first shield with the second shield is equipped with respectively and is used for connecting the connecting hole of filter capacitor structure, for example, the connecting hole of 6 departments of filter input cable and 3 departments of filter output connecting holes, filter capacitor structure 5 with the connection can be dismantled to the connecting hole. The filter input cable 6 is in signal connection with the filter capacitor structure 5, the filter capacitor structure 5 penetrates through the filter shielding body unit 4, electromagnetic radiation generated by relevant devices or equipment in the shielding body unit is prevented from leaking through a connecting hole or a cable, the filter input cable 6 outputs a signal from the filter output connecting hole 3 to the outside, and the output signal can be directly connected with other equipment, for example, the equipment is connected with first-closing equipment through an equipment connecting hole 2 on the equipment shielding body unit 1, or the output signal is connected with the equipment through an output cable, and for example, the filter output connecting hole 3 is directly connected with the equipment connecting hole 2 on the equipment shielding body unit 1.
In order to facilitate the installation, the shield unit 4 further includes a cavity for accommodating and installing a device, the device is connected to the first shield or the second shield, when the first shield is assembled, the first shield is connected to the second shield, and the device disposed on the first shield or the second shield is accommodated in the cavity.
In order to prevent electromagnetic radiation from leaking and facilitate assembly, the filter capacitor structure 5 further includes a nut, the filter capacitor structure penetrates through the connection hole, and the nut is connected with the connection hole.
Further, the shield unit 4 further includes a coaxial connector, the coaxial connector is disposed at a position corresponding to the connection hole, and the connection of the signal cable can be realized through the coaxial connector between different shield units. And the leakage of electromagnetic radiation from the connecting hole and the signal cable is avoided.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A filter capacitor structure, comprising:
the first end of each three-terminal capacitor is connected with a signal cable to be filtered;
the second end of each three-end capacitor is connected with the shell;
and the third end of each three-end capacitor is connected with the signal cable, and the signal cable penetrates through the shell.
2. The filter capacitor structure of claim 1, wherein the housing is further provided with a flange, a bolt or a snap for connection.
3. The filter capacitor structure as claimed in claim 1, wherein the housing extends in the same direction as or parallel to the signal cable.
4. The filter capacitor structure of claim 1, wherein the three-terminal capacitor comprises an inner electrode and an outer electrode, the inner electrode comprising the first terminal and the third terminal, the outer electrode comprising the second terminal.
5. A filter having the filter capacitor structure, comprising:
a shield unit for mounting a device, the shield unit including one or more connection holes for connecting the filter capacitor structure;
the filter capacitor structure of one or more of claims 1 to 4, detachably connected to the connection hole.
6. The filter with the filter capacitor structure as claimed in claim 5, wherein the mathematical expression of the filter with the filter capacitor structure to the earth leakage current is as follows:
Iid＝UC*2πf*C
wherein, IidIs the earth leakage current, UCThe voltage on the three-terminal capacitor, f is the voltage frequency, and C is the capacitor of the filter capacitor structure.
7. A filter having the filter capacitor structure, comprising:
a plurality of filter capacitor structures as claimed in any one of claims 1 to 5;
the shielding body unit comprises a first shielding body and a second shielding body, the first shielding body and the second shielding body are detachably connected, the first shielding body and the second shielding body are respectively provided with a connecting hole for connecting the filter capacitor structure, and the filter capacitor structure is detachably connected with the connecting hole.
8. The filter with the filter capacitor structure as claimed in claim 7, wherein the shield unit further comprises a cavity for receiving and mounting a device, the device being connected to the first shield or the second shield.
9. The filter having the filter capacitor structure as claimed in claim 7, wherein the filter capacitor structure further comprises a nut, the filter capacitor structure passes through the connection hole, and the nut is connected to the connection hole.
10. The filter having the filter capacitor structure as claimed in claim 7, wherein the shield unit further comprises a coaxial connector disposed at a position corresponding to the connection hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021349966.3U CN212783077U (en) | 2020-07-10 | 2020-07-10 | Filter capacitor structure and filter with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021349966.3U CN212783077U (en) | 2020-07-10 | 2020-07-10 | Filter capacitor structure and filter with same |
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| Publication Number | Publication Date |
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| CN212783077U true CN212783077U (en) | 2021-03-23 |
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| CN202021349966.3U Active CN212783077U (en) | 2020-07-10 | 2020-07-10 | Filter capacitor structure and filter with same |
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| CN (1) | CN212783077U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111785518A (en) * | 2020-07-10 | 2020-10-16 | 重庆市药品技术审评认证中心 | Filter capacitor structure and filter with same |
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2020
- 2020-07-10 CN CN202021349966.3U patent/CN212783077U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111785518A (en) * | 2020-07-10 | 2020-10-16 | 重庆市药品技术审评认证中心 | Filter capacitor structure and filter with same |
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yu Yuanjun Inventor after: Guo Qi Inventor after: Xu Zhijun Inventor after: Tan Jianwen Inventor before: Yu Yuanjun Inventor before: Guo Qi Inventor before: Xu Zhijun Inventor before: Tan Jianwen Inventor after: Gao Lihong Inventor after: Yu Yuanjun Inventor after: Guo Qi Inventor after: Xu Zhijun Inventor after: Tan Jianwen Inventor before: Yu Yuanjun Inventor before: Guo Qi Inventor before: Xu Zhijun Inventor before: Tan Jianwen |
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| CB03 | Change of inventor or designer information |