CN201860113U - Power filter component - Google Patents
Power filter component Download PDFInfo
- Publication number
- CN201860113U CN201860113U CN2010206198297U CN201020619829U CN201860113U CN 201860113 U CN201860113 U CN 201860113U CN 2010206198297 U CN2010206198297 U CN 2010206198297U CN 201020619829 U CN201020619829 U CN 201020619829U CN 201860113 U CN201860113 U CN 201860113U
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- CN
- China
- Prior art keywords
- filter
- power
- frequency filter
- high frequency
- connector
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- 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.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model belongs to technology of electronics and relates to a power filter component, which comprises a filter connector, a high frequency filter and a low frequency filter. The filter connector, the high frequency filter and the low frequency filter are sequentially connected, the filter connector is grounded and connected with a shielding case to form a shielding piece, the high frequency filter is mounted on a metal panel at a power wire inlet inside the case, an input end and an output end of the high frequency filter are isolated by the metal panel, the low frequency filter is directly mounted on the metal panel of the shielding case and arranged close to a through capacitor, and an input end and an output end of the low frequency filter are isolated by the metal panel. The power filter component not only effectively suppresses high frequency interference, but also effectively suppresses low frequency interference. When used, the power filter component plays an active role in facilitating modern aviation airborne equipment and modern electronic equipment in meeting the requirement of electromagnetic compatibility.
Description
Technical field
The utility model belongs to the electronic technology class, relates to a kind of power filter assembly.
Background technology
Requirement along with military modernization, a principal character of modern electronic product is digitlization, the application of high speed microprocessor is very general, these digital circuits are when work, can produce very strong electromagnetic interference emission, this not only might make the product can not be by relevant Electro Magnetic Compatibility standard testing, even can't guarantee the stability of self.Therefore electromagnetic compatibility technology becomes the content that many technical staff pay attention to, and mandatory restriction has all been done to the Electro Magnetic Compatibility of electronic product by each state in the world.Aviation airborne equipment must satisfy GJB151A-97 (military equipment and subsystem electromagnetic emission and susceptibility require) and GJB152A-97 (military equipment and subsystem electromagnetic emission and susceptibility are measured), and product has only by the requirement of the Electro Magnetic Compatibility in " airborne equipment technical agreemet " and can install.
And generally link to each other between prior art aviation airborne equipment and modern electronic equipment and the power supply by common connector, therefore there is bigger electromagnetic interference, aviation airborne equipment and modern electronic equipment need the electromagnetic interference of suppression equipment generation itself to enter power line for this reason, suppress the interference access arrangement on the power line simultaneously.
Summary of the invention
The purpose of this utility model is: the utility model provides a kind of power filter assembly that can suppress electromagnetic interference, realize High frequency filter river low frequency filtering.
The technical solution of the utility model is: a kind of power filter assembly, it comprises filter connector, high frequency filter and the low-frequency filter that links to each other in turn, wherein, described filter connector ground connection and and shielding case connect into shield, described high frequency filter is installed on the metal decking of power line porch in the cabinet, its input and output side is isolated by metal decking, low-frequency filter is directly installed on the metal decking of shielding case, close on the feedthrough capacitor setting, and its input and output side is isolated by metal decking.
Described high frequency filter is a feedthrough capacitor.
Described feedthrough capacitor is that screw-type passes through formula electric capacity.
Described high frequency filter is a feed-through filter.
The power supply lead wire of described filter connector is provided with a low pass filter.
Contact-making surface between described low-frequency filter and the metal decking is provided with the electromagnetic sealing liner.
Be provided with between described filter connector and the shielding case and be used to the conductive rubber slab that guarantees that filter connector and cabinet wall conduct electricity fully.
Technique effect of the present utility model: power filter assembly of the present invention utilizes filter connector to replace original common connector, guarantee the shielding and the ground connection of connector, and feedthrough capacitor is being installed near porch, power line place, described feedthrough capacitor is installed on the metal decking.The input and output side that can guarantee power line is isolated by metallic plate like this, has eliminated high-frequency coupling, and the metal mounting panel is installed on the cabinet wall, guarantees to install screw-type with this and passes through formula filter and cabinet good earth, to reach good filtering effect.And on metal decking, close on feedthrough capacitor low-frequency filter is installed, thereby can effectively suppress low-frequency disturbance on the power line.Being used in combination of three kinds of filter elements formed the high-performance filtering unit that is applicable to power filter, not only effectively suppressed High-frequency Interference, also effectively suppressed low-frequency disturbance simultaneously.The use of the high-performance filtering unit of this power filter is satisfied Electro Magnetic Compatibility to modern aviation airborne equipment and modern electronic equipment and is required to have played effective function.
Description of drawings
Fig. 1 is the structural representation of the utility model power filter assembly one better embodiment.
Embodiment
The utility model is described in further detail below by embodiment:
See also Fig. 1, it is the structural representation of the utility model power filter assembly one better embodiment.The utility model power filter assembly comprises filter connector, high frequency filter and low-frequency filter.Wherein, the contact pin (hole) of the power supply signal pin of described filter connector is gone up a filter is installed, and power pins has been carried out Filtering Processing.When installing, filter connector guarantees the shielding and the ground connection of connector.Filter connector must have good earth just can play the filter action of expection, for the filter connector that is directly installed on the cabinet panel, increasing conductive rubber slab between filter connector and cabinet wall conducts electricity fully to guarantee filter connector and cabinet wall, form a complete shield, to reach good filtering effect.Described filter connector can effectively suppress the harassing and wrecking electric current in the cable, and the interference that can suppress in the cabinet is transmitted on the power line, after harassing and wrecking in the shielding case are coupled on one section cable of cabinet inside, just can not be transmitted to cabinet causes radiation outward, High-frequency Interference on the filtered signal line, and extraneous harassing and wrecking also can not enter shielding case by cable coupling and conduction, guarantee that cable is becoming " totally " cable through after the filtering.
Described high frequency filter is that a screw-type passes through the formula feedthrough capacitor, and this feedthrough capacitor is installed on the metal decking of power line porch in the cabinet, and the ground connection inductance of described feedthrough capacitor is very little, does not almost have the influence of lead-in inductance.In addition, the input and output side of described feedthrough capacitor is isolated by metallic plate, has eliminated high-frequency coupling, therefore can suppress the conduction and the high-frequency coupling interference of power line signal by feedthrough capacitor.Feed-through filter can be with solving High frequency filter, the circuit structure of feed-through filter has C type (single feedthrough capacitor), L type (feedthrough capacitor adds an inductance), T type (two inductance add a feedthrough capacitor), π type (two feedthrough capacitors add an inductance) etc., the circuit devcie of filter is many more, then the filter transition band is short more, and stopband insertion loss is big more.
Described low-frequency filter is " FM-704A EMI FILTER 40W ", this low-frequency filter is directly installed on the metal decking of shielding case, and on contact-making surface, use the electromagnetic sealing liner, utilize device housings to realize isolating, make between the input, output port of filter and isolate fully, and ground connection is good.Its installation site is near feedthrough capacitor, and the power line of filter is short as far as possible.The incoming line of filter and output line can not bundle, and can avoid high-frequency interferencing signal directly to be coupled by incoming line and output line like this, and filter by-pass is fallen.This mode filter is minimum, and 1MHz reduces 55dB in order to reduce 60dB at 500kHz, therefore can effectively suppress the low-frequency disturbance on the power line.
The utility model power filter assembly being used in combination by filter connector, high frequency filter and low-frequency filter, formed the high-performance filtering unit that is applicable to power filter, not only effectively suppressed High-frequency Interference, also effectively suppressed simultaneously low-frequency disturbance, and can select corresponding filter at different interfering frequencies, make product satisfy the power filter effect of modern aviation airborne equipment and modern electronic equipment and the requirement of electromagnetic compatibility standard, therefore have bigger actual application value.
Claims (7)
1. power filter assembly, it is characterized in that: comprise the filter connector, high frequency filter and the low-frequency filter that link to each other in turn, wherein, described filter connector ground connection and and shielding case connect into shield, described high frequency filter is installed on the metal decking of power line porch in the cabinet, and its input and output side is isolated by metal decking, and low-frequency filter is directly installed on the metal decking of shielding case, close on the feedthrough capacitor setting, and its input and output side is isolated by metal decking.
2. power filter assembly according to claim 1 is characterized in that: described high frequency filter is a feedthrough capacitor.
3. power filter assembly according to claim 2 is characterized in that: described feedthrough capacitor is that screw-type passes through formula electric capacity.
4. power filter assembly according to claim 2 is characterized in that: described high frequency filter is a feed-through filter.
5. according to claim 3 or 4 described power filter assemblies, it is characterized in that: the power supply lead wire of described filter connector is provided with a low pass filter.
6. power filter assembly according to claim 5 is characterized in that: the contact-making surface between described low-frequency filter and the metal decking is provided with the electromagnetic sealing liner.
7. power filter assembly according to claim 6 is characterized in that: be provided with between described filter connector and the shielding case and be used to the conductive rubber slab that guarantees that filter connector and cabinet wall conduct electricity fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206198297U CN201860113U (en) | 2010-11-19 | 2010-11-19 | Power filter component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206198297U CN201860113U (en) | 2010-11-19 | 2010-11-19 | Power filter component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201860113U true CN201860113U (en) | 2011-06-08 |
Family
ID=44105912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206198297U Expired - Lifetime CN201860113U (en) | 2010-11-19 | 2010-11-19 | Power filter component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201860113U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038159A (en) * | 2014-06-09 | 2014-09-10 | 广州广电计量检测股份有限公司 | Electromagnetic compatibility pre-amplifier and control method thereof |
| CN105658010A (en) * | 2014-11-12 | 2016-06-08 | 沈阳新松机器人自动化股份有限公司 | Robot electrical control cabinet |
| CN109222922A (en) * | 2018-10-17 | 2019-01-18 | 南京沃福曼医疗科技有限公司 | A method of improving the anti-level interference of OCT equipment sensitive circuit |
| CN109510455A (en) * | 2019-01-04 | 2019-03-22 | 武汉海达数云技术有限公司 | Power supply change-over device |
| CN110417252A (en) * | 2019-07-17 | 2019-11-05 | 陕西千山航空电子有限责任公司 | A kind of power filter box |
| CN111431502A (en) * | 2020-03-31 | 2020-07-17 | 四川九八村信息科技有限公司 | System and method for electromagnetic compatibility prevention and control of analog signals |
-
2010
- 2010-11-19 CN CN2010206198297U patent/CN201860113U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038159A (en) * | 2014-06-09 | 2014-09-10 | 广州广电计量检测股份有限公司 | Electromagnetic compatibility pre-amplifier and control method thereof |
| CN105658010A (en) * | 2014-11-12 | 2016-06-08 | 沈阳新松机器人自动化股份有限公司 | Robot electrical control cabinet |
| CN109222922A (en) * | 2018-10-17 | 2019-01-18 | 南京沃福曼医疗科技有限公司 | A method of improving the anti-level interference of OCT equipment sensitive circuit |
| CN109510455A (en) * | 2019-01-04 | 2019-03-22 | 武汉海达数云技术有限公司 | Power supply change-over device |
| CN110417252A (en) * | 2019-07-17 | 2019-11-05 | 陕西千山航空电子有限责任公司 | A kind of power filter box |
| CN111431502A (en) * | 2020-03-31 | 2020-07-17 | 四川九八村信息科技有限公司 | System and method for electromagnetic compatibility prevention and control of analog signals |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110608 |