CN115064907A - Fan electric connection grounding device for improving conduction emission resistance and radiation emission resistance - Google Patents
Fan electric connection grounding device for improving conduction emission resistance and radiation emission resistance Download PDFInfo
- Publication number
- CN115064907A CN115064907A CN202210781520.5A CN202210781520A CN115064907A CN 115064907 A CN115064907 A CN 115064907A CN 202210781520 A CN202210781520 A CN 202210781520A CN 115064907 A CN115064907 A CN 115064907A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- emission resistance
- fan
- power supply
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 14
- 241000886569 Cyprogenia stegaria Species 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- 239000010949 copper Substances 0.000 abstract description 6
- 239000003973 paint Substances 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 5
- 239000003990 capacitor Substances 0.000 description 24
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000005340 laminated glass Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A fan electric connection grounding device for improving the conduction emission resistance and the radiation emission resistance belongs to the technical field of brushless direct current fans. The device is characterized in that three branches are connected in parallel between a power supply positive electrode and a power supply negative electrode of a circuit board, copper is coated on an arc-shaped contact area of the circuit board, and a mounting surface, which is used for being connected with the circuit board and is not subjected to paint spraying treatment, of a fan shell is lapped with the contact area. After the operation, the impedance of the ground wire can be reduced, the conduction emission resistance and the radiation emission resistance can be improved, the voltage drop can be reduced, and the power supply efficiency can be improved.
Description
Technical Field
The invention belongs to the technical field of brushless direct current fans, and particularly relates to a fan electric connection grounding device for improving conduction emission resistance and radiation emission resistance.
Background
Due to the particularity of the semi-open structure of the fan, when the fan is connected with a circuit board, in order to avoid electric conduction, paint is often sprayed on a shell of the fan, copper-clad treatment is not carried out on the circuit board, and after the two operations, the fan is weak in conduction emission resistance and radiation emission resistance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a fan electric continuity grounding device for improving the conduction emission resistance and radiation emission resistance.
The technical scheme adopted by the invention is as follows: the utility model provides an improve fan electricity continuous grounding device of anti conduction emission and radiation emission ability, its technical essential is, three branch road of parallel connection between the power positive negative pole of circuit board, do respectively: the fan comprises a first parallel branch formed by connecting a first capacitor and a second capacitor in series, a second parallel branch formed by connecting the second capacitor and a third capacitor in series, and a third parallel branch formed by connecting a fourth capacitor and a fifth capacitor in series, wherein a first node between the first capacitor and the second capacitor, a second node between the second capacitor and the third capacitor, and a third node between the fourth capacitor and the fifth capacitor are connected to an arc-shaped contact area of a circuit board, the surface of the contact area is coated with copper, and a mounting surface, which is used for being connected with the circuit board and is not subjected to paint spraying treatment, of a fan shell is lapped with the contact area.
In the scheme, the circuit board and the fan shell are grounded together.
The invention has the beneficial effects that: the fan electric connection grounding device for improving the conduction emission resistance and the radiation emission resistance is characterized in that three branches are connected in parallel between a power supply positive electrode and a power supply negative electrode of a circuit board, copper is coated on an arc contact area of the circuit board, and a mounting surface, which is used for being connected with the circuit board and is not subjected to paint spraying treatment, of a fan shell is lapped with the contact area. After the operation, the impedance of the ground wire can be reduced, the conduction emission resistance and the radiation emission resistance can be improved, the voltage drop can be reduced, and the power supply efficiency can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a fan and a circuit board according to an embodiment of the present invention;
FIG. 2 is a schematic view of a fan mounting surface according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a circuit of three parallel branches of a circuit board according to an embodiment of the present invention.
The numbers in the figure illustrate the following: 1 circuit board, 2 fans, 3 installation faces.
Detailed Description
The above objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention with reference to the accompanying drawings 1 to 3.
The housing material of the fan 2 adopted in the embodiment is die-cast aluminum alloy, and the material of the circuit board 1 is an epoxy laminated glass cloth board, which are fastened and matched through bonding or screws. Three branches are connected in parallel between the positive power supply +28V and the negative power supply GND of the circuit board, and the three branches are respectively: the fan shell structure comprises a first parallel branch formed by serially connecting a capacitor C1 and a capacitor C2, a second parallel branch formed by serially connecting a capacitor C1A and a capacitor C2A, and a third parallel branch formed by serially connecting a capacitor C1B and a capacitor C2B, wherein a first node on a connecting line of the capacitor C1 and the capacitor C2, a second node on a connecting line of the capacitor C1A and the capacitor C1B, and a third node on a connecting line of the capacitor C1B and the capacitor C2B are all connected to an arc-shaped contact region of a circuit board, the position of the contact region is adapted to a mounting surface of a fan shell, and the surface of the contact region is coated with copper in the embodiment. The fan housing is used for connecting with the circuit board, and the mounting surface 3 which is not painted overlaps with the contact area.
Utilize fan electric continuity ground device that improves anti conduction emission and radiation emission ability, include the following step:
in the embodiment, the circuit board at the lap joint part of the circuit board 1 and the fan shell is coated with copper, and the fan shell at the lap joint part of the circuit board and the fan shell is not painted, so that the impedance of a ground wire can be reduced after operation, the conduction emission resistance and the radiation emission resistance can be improved, the voltage drop can be reduced, and the power supply efficiency can be improved; and the circuit board of the embodiment is grounded with the fan power supply and used for reducing the loop area. The contact position of the fan shell and the circuit board is not painted, and the paint spraying protection area is shown in figure 3.
The electric continuity is realized by covering copper on the matching position of the circuit board and the shell and not spraying paint on the contact position of the fan shell and the circuit board, the contact area between the shell and the circuit board is increased, and the aims of improving the conduction emission resistance and the radiation emission resistance are fulfilled.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. The utility model provides an improve fan electricity continuous grounding device of anti conduction emission and radiation emission ability which characterized in that, three branch road of parallel connection between the power positive negative pole of circuit board, do respectively: the fan shell is used for being connected with the circuit board, a mounting surface which is not painted is lapped with the contact area.
2. The fan electrical continuity grounding system for enhancing resistance to conducted and radiated emissions of claim 1, wherein said circuit board is common to the fan housing power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210781520.5A CN115064907A (en) | 2022-07-05 | 2022-07-05 | Fan electric connection grounding device for improving conduction emission resistance and radiation emission resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210781520.5A CN115064907A (en) | 2022-07-05 | 2022-07-05 | Fan electric connection grounding device for improving conduction emission resistance and radiation emission resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115064907A true CN115064907A (en) | 2022-09-16 |
Family
ID=83205132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210781520.5A Pending CN115064907A (en) | 2022-07-05 | 2022-07-05 | Fan electric connection grounding device for improving conduction emission resistance and radiation emission resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115064907A (en) |
-
2022
- 2022-07-05 CN CN202210781520.5A patent/CN115064907A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |