CN217036754U - Anti-interference active filter - Google Patents
Anti-interference active filter Download PDFInfo
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- CN217036754U CN217036754U CN202220872179.XU CN202220872179U CN217036754U CN 217036754 U CN217036754 U CN 217036754U CN 202220872179 U CN202220872179 U CN 202220872179U CN 217036754 U CN217036754 U CN 217036754U
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Abstract
The utility model relates to the technical field of filters, in particular to an anti-interference active filter which comprises a cabinet body and a cabinet door. The front end face of the cabinet body is provided with a cabinet door, the inner frame is fixedly arranged in the cabinet body, a plurality of support plates are sequentially arranged in the inner frame from top to bottom, the plurality of isolation covers wrap the plurality of support plates respectively and are fixed through the inner frame, the support plates are used for supporting different electrical elements of the active filter, and the isolation covers are used for eliminating electromagnetic interference among the different electrical elements. According to the utility model, the plurality of isolation covers are arranged in the cabinet body of the active filter, and different electric elements of the active filter are placed in each isolation cover, so that the external electromagnetic interference of the electric elements is isolated from the electromagnetic waves generated by the electric elements, and the anti-electromagnetic interference capability of the active filter is improved.
Description
Technical Field
The utility model relates to the technical field of filters, in particular to an anti-interference active filter.
Background
The power system is connected with various load devices, wherein a large part of the load devices are nonlinear loads, the nonlinear loads can generate harmonic currents with different frequencies from the power frequency in the operation process, the harmonic currents enter the power public network to generate harmonic pollution, and influence and damage are caused to other electric equipment, such as reduction of utilization efficiency of electric energy, overheating of electric equipment, shortening of service life of electric elements and the like, so that the harmonic currents generated by the nonlinear loads need to be compensated in order to reduce the harmonic pollution.
The active power filter is a dynamic harmonic suppression and reactive compensation power electronic device, can compensate harmonic and reactive with variable frequency and magnitude, can make up for the defects of a passive filter, obtains better compensation characteristics than the passive filter, and is an ideal harmonic compensation device. The active filter has the functions of reducing the disturbance voltage emission of a product to a power grid, improving the immunity of the product and blocking the influence of an unclean power supply of the power grid on equipment.
In practical application, the active filter is usually used together with a frequency converter or other electrical equipment, and the frequency converter and the electrical equipment in the using process can emit high-frequency electromagnetic waves and generate radio frequency interference on the active filter, and if the radio frequency interference is not subjected to suppression processing, malfunction of the active filter is inevitably generated, and normal operation of the equipment is influenced. Meanwhile, electromagnetic interference may also be generated between internal electrical components of the active filter, such as a primary coil and a secondary coil of a transformer, a reactor, and the like, and interference electromagnetic waves generated between the internal electrical components may also affect the filtering result of the active filter.
Disclosure of Invention
In view of this, the present invention provides an anti-interference active filter, in which a plurality of isolation covers are disposed in a cabinet of the active filter, and each of the isolation covers accommodates a different electrical component of the active filter, so as to isolate external electromagnetic interference of the electrical component from electromagnetic waves generated by the electrical component, thereby improving the anti-electromagnetic interference capability of the active filter.
In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides an anti-interference active filter, which comprises a cabinet body and a cabinet door. The front end face of the cabinet body is provided with a cabinet door, the inner frame is fixedly arranged in the cabinet body, a plurality of support plates are sequentially arranged in the inner frame from top to bottom, the plurality of isolation covers wrap the plurality of support plates respectively and are fixed through the inner frame, the support plates are used for supporting different electrical elements of the active filter, and the isolation covers are used for eliminating electromagnetic interference among the different electrical elements.
In the above anti-interference active filter, as a preferred scheme, two vertical rods are fixedly arranged on two sides of the inner frame respectively, two ends of the support plate are arranged on the vertical rods on the two sides respectively, a plurality of cross rods are horizontally arranged on the two vertical rods on the rear side from top to bottom, and the isolation cover is arranged on the cross rods.
In the above anti-interference active filter, as a preferred scheme, the cross-sectional shape of the isolation cover is circular, and the isolation cover comprises a fixed cover and an opening and closing cover, wherein the fixed cover is detachably connected to the cross rod, the opening and closing cover is hinged to the fixed cover, and the cross-sectional shape of the fixed cover and the cross-sectional shape of the isolation cover after being spliced are circular.
In the above anti-interference active filter, as a preferred scheme, there are two splicing positions of the fixed cover and the opening and closing cover, the upper splicing position is located right above the support plate, and the lower splicing position is located at the front end of the support plate and not higher than the plane of the support plate.
In the above anti-interference active filter, as a preferred scheme, the fixed cover is hinged to a lower splicing part of the opening and closing cover, a buckle is arranged at an upper splicing part, the buckle is used for clamping the fixed cover and the opening and closing cover, and the opening and closing cover is provided with a handle.
In the above anti-interference active filter, as a preferred scheme, the inner circular surfaces of the fixed cover and the opening and closing cover are fixedly provided with an isolation layer, the isolation layer is provided with a seam at an upper part splicing part, the seams of the isolation layer are connected in a contact manner, and the isolation layer is made of copper foil.
In the above anti-interference active filter, as a preferred scheme, two fixing plates are horizontally and fixedly arranged at the rear side of the fixing cover, and the two fixing plates correspond to and are detachably connected with the two adjacent cross rods respectively.
In the above anti-interference active filter, as a preferred scheme, the support plate is provided with wire passing holes on both the left and right sides.
In the above anti-interference active filter, as a preferred scheme, an exhaust port is arranged at an upper portion of one side face of the cabinet body, and an air inlet is arranged at a lower portion of the opposite side face of the exhaust port.
In the above anti-interference active filter, as an optimal scheme, the exhaust fan is detachably arranged on the vertical rod at the exhaust port.
The utility model provides an anti-interference active filter, which has the following beneficial effects:
the utility model provides an anti-interference active filter, wherein a cabinet body of the active filter is provided with a plurality of isolation covers, different electric elements of the active filter are placed in each isolation cover, each isolation cover is a metal ring forming a loop, when high-frequency electromagnetic waves are generated, eddy currents are formed in the isolation covers, according to the lenz law, the eddy currents always prevent the change of an electromagnetic field, namely the electromagnetic shielding effect of energy of the electromagnetic field is consumed, the external electromagnetic interference of the electric elements is isolated from the self-generated high-frequency electromagnetic waves, and the anti-electromagnetic interference capability of the active filter is improved.
Drawings
Fig. 1 is a schematic diagram of an overall structure of an antijam active filter according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an overall structure of an internal structure of an anti-interference active filter according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an overall structure of an internal frame of an anti-interference active filter according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a general structure of an anti-interference active filter isolation cover according to an embodiment of the present invention.
Description of reference numerals:
1. a cabinet body; 2. a cabinet door; 3. an exhaust port; 4. an air inlet; 5. an exhaust fan; 6. an inner frame; 7. a wiring switch; 8. a support plate; 9. an isolation cover; 10. a vertical rod; 11. a cross bar; 12. a wire passing hole; 13. a fixed cover; 14. an opening and closing cover; 15. an isolation layer; 16. buckling; 17. a fixing plate; 18. a handle.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic general structural diagram of an anti-interference active filter according to an embodiment of the present invention, and fig. 2 is a schematic general structural diagram of an internal structure of the anti-interference active filter according to the embodiment of the present invention; the utility model provides an anti-interference active filter, which comprises a cabinet body 1 and a cabinet door 2. The front end face of the cabinet body 1 is provided with a cabinet door 2, the inner frame 6 is fixedly arranged in the cabinet body 1, a plurality of support plates 8 are sequentially arranged in the inner frame 6 from top to bottom, the plurality of isolation covers 9 wrap the plurality of support plates 8 respectively and are fixed through the inner frame 6, the support plates 8 are used for supporting different electrical elements of the active filter, and the isolation covers 9 are used for eliminating electromagnetic interference among the different electrical elements.
Different active filter electrical elements, such as reactors, capacitors, amplifiers, transformers and the like, can be placed on different support plates 8 in the cabinet body 1, and different electrical elements are configured according to different filtering requirements, so that the cabinet body is suitable for low-pass active filters, high-pass active filters, band-stop active filters and the like, and active filters with different orders can also be suitable. Wiring switch 7 can be set in advance in the cabinet body 1, and wiring is convenient during construction.
Referring to fig. 3, fig. 3 is a schematic diagram of a general structure of an inner frame 6 of an anti-interference active filter according to an embodiment of the present invention; in the above anti-interference active filter, as a preferred scheme, two vertical rods 10 are respectively and fixedly arranged on two sides of the inner frame 6, two ends of the plurality of support plates 8 are respectively installed on the vertical rods 10 on the two sides, a plurality of cross rods 11 are horizontally arranged on the two vertical rods 10 on the rear side from top to bottom, and the isolation cover 9 is installed on the cross rods 11.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating an overall structure of an anti-interference active filter isolation cover 9 according to an embodiment of the present invention; in the above anti-interference active filter, as a preferred scheme, the cross-sectional shape of the isolation cover 9 is circular, and the isolation cover comprises a fixed cover 13 and an opening and closing cover 14, the fixed cover 13 is detachably connected to the cross bar 11, the opening and closing cover 14 is hinged to the fixed cover 13, and the cross-sectional shape of the fixed cover 13 and the cross-sectional shape of the isolation cover 9 after being spliced are circular.
In the above anti-interference active filter, as a preferred scheme, there are two splicing positions of the fixed cover 13 and the opening and closing cover 14, where the splicing position at the upper part is located right above the support plate 8, and the splicing position at the lower part is located at the front end of the support plate 8 and is not higher than the plane of the support plate 8.
In the above anti-interference active filter, as a preferred scheme, the fixed cover 13 is hinged to a lower splicing part of the opening and closing cover 14, a buckle 16 is arranged at an upper splicing part, the buckle 16 is used for clamping the fixed cover 13 and the opening and closing cover 14, and the opening and closing cover 14 is provided with a handle 18.
In the above anti-interference active filter, as a preferable scheme, the inner circular surfaces of the fixed cover 13 and the opening and closing cover 14 are fixedly provided with an isolation layer 15, the isolation layer 15 is provided with a seam at an upper part splicing part, the connection mode of the seams of the isolation layer 15 is contact connection, and the isolation layer 15 is a copper foil.
In the above anti-interference active filter, as a preferable scheme, two fixing plates 17 are fixedly and horizontally arranged at the rear side of the fixing cover 13, and the two fixing plates 17 correspond to and are detachably connected with the two adjacent cross bars 11 respectively.
In the above anti-interference active filter, as a preferred scheme, the support plate 8 is provided with wire passing holes 12 on both the left and right sides.
In the above anti-interference active filter, as a preferred scheme, an exhaust port 3 is arranged at an upper portion of one side surface of the cabinet body 1, and an air inlet 4 is arranged at a lower portion of the opposite side surface of the exhaust port 3.
In the above anti-interference active filter, as a preferred scheme, the exhaust fan 5 is detachably disposed on the vertical rod 10 at the exhaust port 3. The exhaust port 3 and the air inlet 4 are arranged in a relative staggered manner, so that the air exchange efficiency of the air in the cabinet body 1 can be improved. The exhaust port 3 and the exhaust fan 5 are arranged at the upper part of the cabinet body 1, and hot air rises, so that heat generated by the active filter can be taken away quickly.
According to the specific embodiment of the utility model, a plurality of isolation covers 9 are arranged in a cabinet body 1 of the active filter, each isolation cover 9 is internally provided with different electric elements of the active filter, the isolation covers 9 are metal rings forming a loop, when high-frequency electromagnetic waves are generated, eddy currents are formed in the isolation covers 9, according to lenz's law, the eddy currents always prevent the change of the electromagnetic fields, namely, the electromagnetic fields are consumed to generate electromagnetic shielding effects, the external electromagnetic interference of the electric elements is isolated from the self-generated high-frequency electromagnetic waves, and the electromagnetic interference resistance of the active filter is improved.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing detailed description of the embodiments of the present invention has been presented for purposes of illustration and description, and is intended to be exemplary only and is not intended to be exhaustive or to limit the utility model to the precise forms disclosed; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An anti-interference active filter is characterized by comprising a cabinet body, a cabinet door, an inner frame and a plurality of isolation covers, wherein the cabinet door is arranged on the front end face of the cabinet body, the inner frame is fixedly arranged in the cabinet body, a plurality of support plates are sequentially arranged in the inner frame from top to bottom, the plurality of isolation covers respectively wrap the plurality of support plates and are fixed through the inner frame, the support plates are used for supporting different electrical elements of the active filter, and the isolation covers are used for eliminating electromagnetic interference among the different electrical elements.
2. The antijam active filter of claim 1, wherein two vertical rods are fixedly arranged on two sides of the inner frame, two ends of the plurality of support plates are respectively arranged on the two vertical rods, a plurality of cross rods are horizontally arranged on the two vertical rods on the rear side from top to bottom, and the isolation cover is arranged on the cross rods.
3. The anti-interference active filter according to claim 2, wherein the cross section of the isolation cover is circular, and the anti-interference active filter comprises a fixed cover and an opening and closing cover, the fixed cover is detachably connected to the cross bar, the opening and closing cover is hinged to the fixed cover, and the cross section of the fixed cover after being spliced with the isolation cover is circular.
4. The antijam active filter of claim 3, wherein there are two splicing positions of the fixed cover and the opening and closing cover, the upper splicing position is located right above the support plate, and the lower splicing position is located at the front end of the support plate and is not higher than the plane of the support plate.
5. The active antijam filter of claim 4, wherein the fixed cover is hinged to a lower splicing part of the opening and closing cover, a buckle is arranged at an upper splicing part of the opening and closing cover and used for clamping the fixed cover and the opening and closing cover, and a handle is arranged on the opening and closing cover.
6. The antijam active filter of claim 4, wherein the fixed cover and the opening and closing cover are fixedly provided with isolating layers on inner circular surfaces, the isolating layers are provided with seams at the upper splicing parts, the seams of the isolating layers are connected in a contact mode, and the isolating layers are made of copper foil.
7. The antijam active filter of claim 3, wherein two fixing plates are horizontally arranged on the rear side of the fixing cover, and the two fixing plates are respectively corresponding to and detachably connected with the two adjacent cross rods.
8. The antijam active filter of claim 1, wherein the support plate is provided with wire passing holes on both the left and right sides.
9. The antijam active filter of claim 2, wherein an exhaust port is formed in an upper portion of one side of the cabinet body, and an air inlet is formed in a lower portion of an opposite side of the exhaust port.
10. The antijam active filter of claim 9, wherein a fan is removably mounted on the posts at the exhaust port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220872179.XU CN217036754U (en) | 2022-04-15 | 2022-04-15 | Anti-interference active filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220872179.XU CN217036754U (en) | 2022-04-15 | 2022-04-15 | Anti-interference active filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217036754U true CN217036754U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220872179.XU Active CN217036754U (en) | 2022-04-15 | 2022-04-15 | Anti-interference active filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217036754U (en) |
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2022
- 2022-04-15 CN CN202220872179.XU patent/CN217036754U/en active Active
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