CN207542783U - Passive low pass power-supply filter - Google Patents
Passive low pass power-supply filter Download PDFInfo
- Publication number
- CN207542783U CN207542783U CN201720729988.4U CN201720729988U CN207542783U CN 207542783 U CN207542783 U CN 207542783U CN 201720729988 U CN201720729988 U CN 201720729988U CN 207542783 U CN207542783 U CN 207542783U
- Authority
- CN
- China
- Prior art keywords
- inductance
- utility
- low pass
- model
- supply filter
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model discloses passive low pass power-supply filter, including：Inductance（1）, inductance（1）Both ends respectively with a Cx capacitance（3）One end be connected, two Cx capacitances（3）The other end link together, form simple pi-network structure, Cx capacitances（3）The other end ground connection, inductance（1）Both ends respectively with a Cy capacitance（2）Series connection.Compared with prior art, the utility model is simple in structure, loss is small, noise is low, has that good frequency selective characteristic, inductance resistance value are small, big to the induction reactance of alternating current, shield effectiveness is good.
Description
Technical field
The utility model belongs to wave filter technology field more particularly to passive low pass power-supply filter.
Background technology
Power-supply filter, abbreviation wave filter also known as " EMI power filter " or " EMI power-supply filters " are by electricity
Hold, the filter circuit that inductance and resistance form.Power-supply filter can to the frequency point of specific frequency in power cord or the frequency point with
Outer frequency is effectively filtered out, and obtains the power supply letter after one specific frequency of power supply signal or elimination of a specific frequency
Number.
Power-supply filter is a kind of passive bidirectional network, its one end is power supply, and the other end is load.Its operation principle
For:Power-supply filter input, outlet side and the impedance of power supply and load-side are bigger, more have to the attenuation of electromagnetic interference
Effect, i.e. impedance network.
The wave filter used in screened room, according to its frequency characteristic generally use low-pass filter, it is by inductance and capacitance
It forms, makes the attenuation that it can interfere its mould in stopband and DM EMI offer is larger.
Utility model content
In view of this, it is necessory to provide it is a kind of it is simple in structure, loss is small, noise is low, have good frequency selective characteristic,
The passive low pass power-supply filter that inductance resistance value is small, big to the induction reactance of alternating current, shield effectiveness is good.
In order to overcome the shortcomings of the prior art, the utility model provides following technical scheme：
Passive low pass power-supply filter, which is characterized in that including：
Inductance 1,
The one end of the both ends of inductance 1 respectively with a Cx capacitance 3 is connected,
The other end of two Cx capacitances 3 links together, and forms simple pi-network structure,
The other end ground connection of Cx capacitances 3,
It connects respectively with a Cy capacitance 2 at the both ends of inductance 1.
Preferably, inductance 1 is formed by enameled wire and magnet ring coiling.
Compared with prior art, the technical solution of the utility model is simple in structure, loss is small, noise is low, there have to be good
Frequency selective characteristic, inductance resistance value are small, big to the induction reactance of alternating current, shield effectiveness is good.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
FIG. 1 is a schematic structural view of the utility model.
Specific embodiment
Below with reference to attached drawing, the utility model is described in further detail.
As shown in Figure 1, passive low pass power-supply filter, including：
Inductance 1,
The one end of the both ends of inductance 1 respectively with a Cx capacitance 3 is connected,
The other end of two Cx capacitances 3 links together, and forms simple pi-network structure, i.e.,：Cx capacitances 3 are connected in parallel on
1 both ends of inductance,
The other end ground connection of Cx capacitances 3,
The both ends of inductance 1 are connected respectively with a Cy capacitance 2, i.e.,：Cy capacitances 2 are connected on 1 both ends of inductance.
Based on the above technical solution, inductance 1 is formed by enameled wire and magnet ring coiling.
Compared with prior art, the technical solution of the utility model is simple in structure, loss is small, noise is low, there have to be good
Frequency selective characteristic, inductance resistance value are small, big to the induction reactance of alternating current, shield effectiveness is good.The technical solution of the utility model, with most
Simple circuit structure realizes the demand of screened room.
The explanation of above example is only intended to the method and its core concept that help understands the utility model.It should refer to
Go out, it for those skilled in the art, can also be to this under the premise of the utility model principle is not departed from
Some improvement and modification can also be carried out for utility model, these improvement and modification also fall into the protection domain of the utility model claims
It is interior.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications of these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide range consistent with features of novelty.
Claims (2)
1. passive low pass power-supply filter, which is characterized in that including：
Inductance（1）,
Inductance（1）Both ends respectively with a Cx capacitance（3）One end be connected,
Two Cx capacitances（3）The other end link together, form simple pi-network structure,
Cx capacitances（3）The other end ground connection,
Inductance（1）Both ends respectively with a Cy capacitance（2）Series connection.
2. passive low pass power-supply filter according to claim 1, which is characterized in that inductance（1）By enameled wire and magnet ring
Coiling forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720729988.4U CN207542783U (en) | 2017-06-22 | 2017-06-22 | Passive low pass power-supply filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720729988.4U CN207542783U (en) | 2017-06-22 | 2017-06-22 | Passive low pass power-supply filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207542783U true CN207542783U (en) | 2018-06-26 |
Family
ID=62607549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720729988.4U Active CN207542783U (en) | 2017-06-22 | 2017-06-22 | Passive low pass power-supply filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207542783U (en) |
-
2017
- 2017-06-22 CN CN201720729988.4U patent/CN207542783U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208112624U (en) | A kind of communication of modified 485 anti-jamming circuit | |
| CN208337408U (en) | A kind of ultra-wideband EMC power-supply filter | |
| CN207070030U (en) | The power-supply filter that a kind of differential mode and common mode coexist | |
| CN207542783U (en) | Passive low pass power-supply filter | |
| CN110729978A (en) | High-frequency common mode rejection circuit and electrical apparatus | |
| CN201490718U (en) | Anti-interference circuit for protecting power network and electric appliance | |
| CN203554279U (en) | Novel filtering board | |
| CN208128228U (en) | A kind of device of Conducted Radio Frequency Immunity coupling uncoupling network | |
| CN214799479U (en) | Industrial general power carrier wave trapper | |
| CN202550545U (en) | Three-phase miniwatt electromagnetic-interference power filter | |
| CN211127565U (en) | Special power filter for EMI alternating current medical equipment | |
| CN203839950U (en) | Double-tuning alternating-current filter | |
| CN204652715U (en) | A kind of LED drive power of Electro Magnetic Compatibility | |
| CN207853474U (en) | A kind of energy saver absorbing mains by harmonics | |
| CN203104261U (en) | Electromagnetic compatibility filter | |
| CN207853473U (en) | A kind of UPS uninterruptible power supplies with efficient power filter | |
| CN205987643U (en) | High power filter of stability | |
| CN205901301U (en) | Three -phase AC multilevel filter subassembly with high insertion loss | |
| CN206313658U (en) | High current insertion loss electromagnetic interface filter high | |
| CN2872699Y (en) | Negative mutual-inductive filter | |
| CN203851106U (en) | Wave filter line | |
| CN209018932U (en) | A kind of anti-interference neutral electrode detection circuit | |
| CN104578068A (en) | Low-differential mode noise filter for router alternating-current power supply | |
| CN214014199U (en) | Filter with energy feedback function | |
| CN203104274U (en) | Novel electromagnetic compatibility filter applicable to aircraft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200709 Address after: Building 6, no.6, Nenjiang Road, Tianmuhu Town, Liyang City, Changzhou City, Jiangsu Province Patentee after: Jiangsu wamuke Electronic Technology Co., Ltd Address before: 213300 Nenjiang Road, Tianmu Town, Changzhou City, Jiangsu, Liyang province 6 Patentee before: JIANGSU WEMC TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |