CN110022056A - Common mode noise suppression circuit - Google Patents
Common mode noise suppression circuit Download PDFInfo
- Publication number
- CN110022056A CN110022056A CN201910374091.8A CN201910374091A CN110022056A CN 110022056 A CN110022056 A CN 110022056A CN 201910374091 A CN201910374091 A CN 201910374091A CN 110022056 A CN110022056 A CN 110022056A
- Authority
- CN
- China
- Prior art keywords
- common mode
- coil
- noise suppression
- suppression circuit
- mode noise
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention patent discloses common mode noise suppression circuit, L1 common mode inductance coil, L2 common mode inductance coil are simultaneously wound on magnetic core, when the normal current in circuit flows through common mode inductance, electric current generates in the inductance coil of same-phase coiling reversed magnetic field and is cancelled out each other, and normal signal electric current is mainly influenced by coil resistance at this time；When there is common mode current flowing through coil, due to the same tropism of common mode current, understands the induction reactance that generate magnetic field in the same direction in coil and increase coil, so that coil is shown as high impedance, generate stronger damping, with this attenuation common-mode electric current, achieve the purpose that filtering.The common mode noise suppression circuit, common mode noise suppression circuit device is formed using Nanocrystalline core coiling, it is that a circuit is simple, and inhibitory effect is high, noise reducing circuit device low in cost, performance is stable, noise reducing circuit device is mainly used in the fields such as Switching Power Supply, communication power supply, household electrical appliances as novel EMI filter circuit.
Description
Technical field
The invention patent relates to lightning Protection circuit fields, specially common mode noise suppression circuit.
Background technique
With the development of science and technology the electrical equipment type being connected in power grid more tends to diversification, so that power grid environment
Become increasingly complex, for example, higher hamonic wave, transition when gush, over-voltage, under-voltage and overcurrent the problems such as, all be easy to electrical equipment just
Being often used the service life impacts, and residual current and reactive power then lead to the waste to power grid electric energy, are unfavorable for electric power resource
Effective use.In addition thereto, electrical equipment is influenced by factors such as materials, will also result in the waste of electric energy.Such as existing EMI
Filter by core material and manufacture craft due to being influenced, and loss is big when using in circuit；And volume is also big.It is filtered between EMI
The disadvantages of loss consumption height of wave device, low efficiency, volume is big, and use cost is high.
Patent of invention content
In view of the deficiencies of the prior art, the invention patent provides common mode noise suppression circuit, solves above-mentioned background technique and mentions
Out the problem of.
The invention patent provides the following technical solutions: common mode noise suppression circuit, which is total to by L1
Mould inductance coil, L2 common mode inductance coil and magnetic core are constituted, and L1 common mode inductance coil, L2 common mode inductance coil are simultaneously wound on magnetic core
On, when the normal current in circuit flows through common mode inductance, electric current generates reversed magnetic in the inductance coil of same-phase coiling
And cancel out each other, normal signal electric current is mainly influenced by coil resistance at this time；
When there is common mode current flowing through coil, due to the same tropism of common mode current, magnetic field in the same direction can be generated in coil and is increased
The induction reactance of big coil, makes coil show as high impedance, generates stronger damping, with this attenuation common-mode electric current, reach filtering
Purpose.
Preferably, the magnetic core is nanocrystalline material component.
Preferably, L1 common mode inductance coil, L2 common mode inductance coil and the number of turns for being wound on magnetic core are consistent with phase.
Preferably, there are two incoming end and two input terminals for the common mode noise suppression circuit tool.
Preferably, interference source is accessed in one end of the common mode noise suppression circuit, and the other end accesses disturbed equipment.
The invention patent have it is following the utility model has the advantages that common mode noise suppression circuit device using Nanocrystalline core coiling and
At, it is that a circuit is simple, and inhibitory effect is high, noise reducing circuit device low in cost, performance is stable, noise suppression
Circuit device is mainly used in the fields such as Switching Power Supply, communication power supply, household electrical appliances, this is filtered as novel EMI filter circuit
Wave circuit one terminates interference source, another to terminate disturbed equipment, the common mode EMI signal on route can be made to be controlled in very low
On level.The EMI signal that the circuit can not only inhibit external is incoming, but can decay route itself work when the EMI letter that generates
Number, EMI interference strength can be effectively reduced.
Detailed description of the invention
Fig. 1 is the invention patent structural schematic diagram.
Specific embodiment
Below in conjunction with the attached drawing in the invention patent embodiment, the technical solution in the invention patent embodiment is carried out
Clearly and completely describing, it is clear that described embodiment is only the invention patent a part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the invention patent, those of ordinary skill in the art are without making creative work
Every other embodiment obtained belongs to the range of the invention patent protection.
Referring to Fig. 1, common mode noise suppression circuit, common mode noise suppression circuit, the common mode noise suppression circuit are total to by L1
Mould inductance coil, L2 common mode inductance coil and magnetic core are constituted, and L1 common mode inductance coil, L2 common mode inductance coil are simultaneously wound on magnetic core
On, when the normal current in circuit flows through common mode inductance, electric current generates reversed magnetic in the inductance coil of same-phase coiling
And cancel out each other, normal signal electric current is mainly influenced by coil resistance at this time；
When there is common mode current flowing through coil, due to the same tropism of common mode current, magnetic field in the same direction can be generated in coil and is increased
The induction reactance of big coil, makes coil show as high impedance, generates stronger damping, with this attenuation common-mode electric current, reach filtering
Purpose.
Magnetic core is nanocrystalline material component；L1 common mode inductance coil, L2 common mode inductance coil and the number of turns being wound on magnetic core
It is consistent with phase；There are two incoming end and two input terminals for common mode noise suppression circuit tool；The one of the common mode noise suppression circuit
It terminates into interference source, the other end accesses disturbed equipment.
Working principle, the filter circuit of common mode inductance, L1 and L2 are exactly common mode inductance coil, the two coils are simultaneously wound on same
On one magnetic core (nanocrystalline), the number of turns and phase are all identical, in this way, when the normal current in circuit flows through common mode inductance, electric current
Reversed magnetic field is generated in the inductance coil of same-phase coiling and is cancelled out each other, and normal signal electric current is mainly by coil electricity at this time
The influence of resistance；When there is common mode current flowing through coil, due to the same tropism of common mode current, magnetic field in the same direction can be generated in coil
And increase the induction reactance of coil, so that coil is shown as high impedance, generate stronger damping, with this attenuation common-mode electric current, reaches
The purpose of filtering.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiment of the invention patent, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principle and spirit of the invention patent, repaired
Change, replacement and variant, the range of the invention patent is defined by the appended claims and the equivalents thereof.
Claims (5)
1. common mode noise suppression circuit, the common mode noise suppression circuit is by L1 common mode inductance coil, L2 common mode inductance coil and magnetic
Core is constituted, which is characterized in that L1 common mode inductance coil, L2 common mode inductance coil are simultaneously wound on magnetic core, when the normal electricity in circuit
When stream flows through common mode inductance, electric current generates in the inductance coil of same-phase coiling reversed magnetic field and is cancelled out each other, at this time just
Regular signal electric current is mainly influenced by coil resistance；
When there is common mode current flowing through coil, due to the same tropism of common mode current, magnetic field in the same direction can be generated in coil and is increased
The induction reactance of big coil, makes coil show as high impedance, generates stronger damping, with this attenuation common-mode electric current, reach filtering
Purpose.
2. common mode noise suppression circuit according to claim 1, it is characterised in that: the magnetic core is nanocrystalline material structure
Part.
3. common mode noise suppression circuit according to claim 1, it is characterised in that: L1 common mode inductance coil, L2 common mode electricity
Sense coil and to be wound on the number of turns on magnetic core consistent with phase.
4. common mode noise suppression circuit according to claim 1, it is characterised in that: the common mode noise suppression circuit has
Two incoming ends and two input terminals.
5. common mode noise suppression circuit according to claim 1, it is characterised in that: one end of the common mode noise suppression circuit
Interference source is accessed, the other end accesses disturbed equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374091.8A CN110022056A (en) | 2019-05-07 | 2019-05-07 | Common mode noise suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374091.8A CN110022056A (en) | 2019-05-07 | 2019-05-07 | Common mode noise suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110022056A true CN110022056A (en) | 2019-07-16 |
Family
ID=67193209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910374091.8A Pending CN110022056A (en) | 2019-05-07 | 2019-05-07 | Common mode noise suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110022056A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02206359A (en) * | 1989-02-03 | 1990-08-16 | Hitachi Ltd | Noise filter |
| CN2785228Y (en) * | 2005-01-13 | 2006-05-31 | 中国科学院长春光学精密机械与物理研究所 | Power supply noise filter based on electromagnetic compatibility |
| CN202275686U (en) * | 2011-09-21 | 2012-06-13 | 中国长城计算机深圳股份有限公司 | Common mode inductor, common mode filter and switching mode power supply electromagnetic compatibility circuit |
| CN105006336A (en) * | 2015-07-13 | 2015-10-28 | 深圳市创利电子有限公司 | Common-mode choking coil, filtering circuit and anti-electromagnetic interference power source filter |
| CN204808998U (en) * | 2015-07-13 | 2015-11-25 | 深圳市创利电子有限公司 | Common mode choke coil, filter circuit and anti -electromagnetic interference power filter |
| CN205847083U (en) * | 2016-07-25 | 2016-12-28 | 浙江绍兴苏泊尔生活电器有限公司 | EMC filter circuit and electromagnetism stove |
-
2019
- 2019-05-07 CN CN201910374091.8A patent/CN110022056A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02206359A (en) * | 1989-02-03 | 1990-08-16 | Hitachi Ltd | Noise filter |
| CN2785228Y (en) * | 2005-01-13 | 2006-05-31 | 中国科学院长春光学精密机械与物理研究所 | Power supply noise filter based on electromagnetic compatibility |
| CN202275686U (en) * | 2011-09-21 | 2012-06-13 | 中国长城计算机深圳股份有限公司 | Common mode inductor, common mode filter and switching mode power supply electromagnetic compatibility circuit |
| CN105006336A (en) * | 2015-07-13 | 2015-10-28 | 深圳市创利电子有限公司 | Common-mode choking coil, filtering circuit and anti-electromagnetic interference power source filter |
| CN204808998U (en) * | 2015-07-13 | 2015-11-25 | 深圳市创利电子有限公司 | Common mode choke coil, filter circuit and anti -electromagnetic interference power filter |
| CN205847083U (en) * | 2016-07-25 | 2016-12-28 | 浙江绍兴苏泊尔生活电器有限公司 | EMC filter circuit and electromagnetism stove |
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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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190716 |
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| WD01 | Invention patent application deemed withdrawn after publication |