CN110048587A - A kind of supply harmonic suppressor with buffer protection circuit - Google Patents
A kind of supply harmonic suppressor with buffer protection circuit Download PDFInfo
- Publication number
- CN110048587A CN110048587A CN201910398723.4A CN201910398723A CN110048587A CN 110048587 A CN110048587 A CN 110048587A CN 201910398723 A CN201910398723 A CN 201910398723A CN 110048587 A CN110048587 A CN 110048587A
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- Prior art keywords
- capacitor
- circuit
- buffer protection
- inductance
- protection circuit
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Classifications
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- 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
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/34—Snubber circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Filters And Equalizers (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention discloses a kind of supply harmonic suppressor with buffer protection circuit, for solving existing AC power source harmonic shutter itself without voltage stabilizing function and using LC filtering, since the filtering principle of LC filter circuit is reflection, interference can still be present in the problems in circuit, including rectification circuit, buffer protection circuit, LC filter circuit and the second filter circuit, this has the supply harmonic suppressor of buffer protection circuit, harmonic suppression circuit is formed to inhibit the electromagnetic noise and noise signal of input power, it prevents to power supply disturbance, the high frequency spurs that power supply itself generates are also prevented from simultaneously to interfere power grid；Alternating current converts alternating current to direct current by rectifier U1, DC voltage after exporting rectifier U1 by zener diode VD is more stable, magnetic bead L3 connects with LC filter circuit, the reflection function of LC filter circuit had not only been played in this way, but also took full advantage of magnetic bead L3 to the absorption function of ripple and noise jamming.
Description
Technical field
The present invention relates to supply harmonic suppressor technical field more particularly to a kind of power supply with buffer protection circuit are humorous
Wave suppressor.
Background technique
In recent years, high-tech industry is increasingly prosperous, and various electronic product (such as computer) uses chance in daily life
More frequently.Since electronic product has included many electronic building bricks, and each electronic building brick can generate a large amount of Electromagnetic Interferences
(EMI), especially even more so in the power supply end part of electronic product.A large amount of Electromagnetic Interferences not only each electronics of severe jamming
The running of component itself may cause electronic product damage or event notably by the circuit in severe jamming electronic product what is more
Barrier.When the Electromagnetic Interference of electronic product is serious, also results in other electronic products running exception or damage.Therefore, generally
The power-supply filter of high frequency is respectively mounted in electric equipment products, to reduce influence of the Electromagnetic Interference for electronic product；
The filter circuit that power-supply filter is made of capacitor, inductance and resistance, also known as " EMI power filter ", or
" EMI power-supply filter ", a kind of passive bidirectional network, its one end are power supplys, and the other end is load.The principle of power-supply filter
Be exactly a kind of impedance network: the impedance of power-supply filter input, outlet side and power supply and load-side is bigger, to electromagnetism
The decaying of interference is more effective.Filter can the frequency other than the frequency point or the frequency point to specific frequency in power supply line have
Effect filters out, and obtains the power supply signal of a specific frequency, or eliminate the power supply signal after a specific frequency.
But existing AC power source harmonic shutter itself is filtered without voltage stabilizing function and using LC filter circuit, due to
The filtering principle of LC filter circuit is reflection, and interference can still be present in circuit.
Summary of the invention
It is existing for solving the purpose of the present invention is to provide a kind of supply harmonic suppressor with buffer protection circuit
AC power source harmonic shutter itself without voltage stabilizing function and using LC filter, since the filtering principle of LC filter circuit is
Reflection, interference can still be present in the problems in circuit.
The purpose of the present invention can be achieved through the following technical solutions: a kind of supply harmonic suppression with buffer protection circuit
Device processed, including rectification circuit, buffer protection circuit, LC filter circuit and the second filter circuit, the rectification circuit include rectification
Device U1 and zener diode VD, 1 foot of the rectifier U1 and 3 feet access alternating current, 2 feet of the rectifier U1 and pressure stabilizing two
One end of pole pipe VD connects, and the other end of zener diode VD is connected with inductance L1,4 feet of rectifier U1 and one end of inductance L1
Connection；
The buffer protection circuit includes inductance L1, capacitor C1, capacitor C2, fuse FU, transformer T, diode D1, electricity
Hold C5 and resistance R3；One end of the inductance L1 is connected with capacitor C1, capacitor C2, capacitor C5, the anode of diode D1 and fusing
One end of device FU, the other end of capacitor C1 and the other end of capacitor C2 are simultaneously grounded after connecing, the negative pole end and resistance R3 of diode D1
One end connected with transformer T first siding ring, the other end of resistance R3 is connect with the other end of capacitor C5, and transformer T is primary
The other end of lateral coil is connect with the other end of fuse FU；
The LC filter circuit includes inductance L2 and capacitor C3, and one end of the inductance L2 is connected with transformer T second level side
One end of coil, the other end of inductance L2 are connected with one end of capacitor C3 and magnetic bead L3；
Second filter circuit includes magnetic bead L3 and capacitor C4；The magnetic bead L3 other end connect with one end of capacitor C4 and is followed by
Enter one end of load；The other end of capacitor C4 connect with the other end of the other end of capacitor C3, transformer T second level lateral coil and is followed by
Enter the other end of load；
Further, the capacitor C1, capacitor C2, capacitor C3 and capacitor C4 are filter capacitor, rectifier U1 model
MB6S；
Further, resistance R3 formation peak absorbance circuit in parallel with diode D1 after connecting with capacitor C5.
Beneficial effects of the present invention: rectifier should be passed through with the supply harmonic suppressor of buffer protection circuit, alternating current
U1 converts alternating current to direct current, and the DC voltage after exporting rectifier U1 by zener diode VD is more stable, defeated
Direct current out passes through buffer protection circuit, inductance L1, capacitor C1, capacitor C2, fuse FU, transformer T, diode D1, electricity
Hold the buffer protection circuit that C5 and resistance R3 is constituted, utilizes inductance L1, capacitor C1, capacitor C2, diode D1, capacitor C5 and resistance
R3 is formed by harmonic suppression circuit and inhibits to the electromagnetic noise and noise signal of input power, prevents to power supply disturbance,
The high frequency spurs that power supply itself generates are also prevented from simultaneously to interfere power grid；The safety of buffer circuit circuit is protected by fuse FU
Operation；Then pass through LC filter circuit, inductance L2 and capacitor C3 form LC filter circuit, and AC influence signal largely will be electric
Sense L2, which prevents to absorb, becomes magnetic strength and thermal energy, can inhibit the effect of interference signal, just obtain in output end purer straight
Galvanic electricity stream；Magnetic bead L3 connects with LC filter circuit, has not only played the reflection function of LC filter circuit in this way, but also takes full advantage of magnetic
Absorption function of the pearl L3 to ripple and noise jamming.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is a kind of circuit diagram of the supply harmonic suppressor with buffer protection circuit of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Refering to Figure 1, the present invention is a kind of supply harmonic suppressor with buffer protection circuit, including rectified current
Road, buffer protection circuit, LC filter circuit and the second filter circuit, rectification circuit include rectifier U1 and zener diode VD,
1 foot of rectifier U1 and 3 feet access alternating current, and 2 feet of rectifier U1 are connect with one end of zener diode VD, zener diode
The other end of VD is connected with inductance L1, and 4 feet of rectifier U1 are connect with one end of inductance L1；Alternating current will be handed over by rectifier U1
Galvanic electricity is converted to direct current, and the DC voltage after exporting rectifier U1 by zener diode VD is more stable；
Buffer protection circuit includes inductance L1, capacitor C1, capacitor C2, fuse FU, transformer T, diode D1, capacitor C5
With resistance R3；One end of inductance L1 is connected with the one of capacitor C1, capacitor C2, capacitor C5, the anode of diode D1 and fuse FU
End, the other end of capacitor C1 and the other end of capacitor C2 are simultaneously grounded after connecing, the negative pole end of diode D1 and one end of resistance R3 and
The connection of transformer T first siding ring, the other end of resistance R3 are connect with the other end of capacitor C5, transformer T first siding ring
The other end is connect with the other end of fuse FU；Inductance L1, capacitor C1, capacitor C2, fuse FU, transformer T, diode D1,
The buffer protection circuit that capacitor C5 and resistance R3 is constituted, utilizes inductance L1, capacitor C1, capacitor C2, diode D1, capacitor C5 and electricity
Resistance R3 is formed by harmonic suppression circuit and inhibits to the electromagnetic noise and noise signal of input power, prevents dry to power supply
The high frequency spurs generated are disturbed, while being also prevented from power supply itself to interfere power grid；Buffer circuit circuit is protected by fuse FU
Safe operation；
LC filter circuit includes inductance L2 and capacitor C3, and one end of inductance L2 is connected with the one of transformer T second level lateral coil
End, the other end of inductance L2 are connected with one end of capacitor C3 and magnetic bead L3；Inductance L2 and capacitor C3 forms LC filter circuit, exchange
Interference signal largely will be prevented to absorb by inductance L2 becomes magnetic strength and thermal energy, can inhibit the effect of interference signal, export
End just obtains purer DC current；
Second filter circuit includes magnetic bead L3 and capacitor C4；The magnetic bead L3 other end accesses negative after connecting with one end of capacitor C4
One end of load；The other end of capacitor C4 accesses negative after connecting with the other end of the other end of capacitor C3, transformer T second level lateral coil
The other end of load；Magnetic bead L3 connects with LC filter circuit, has not only played the reflection function of LC filter circuit in this way, but also makes full use of
Absorption function of the magnetic bead L3 to ripple and noise jamming；
Capacitor C1, capacitor C2, capacitor C3 and capacitor C4 are filter capacitor, rectifier U1 model MB6S；
Resistance R3 formation peak absorbance circuit in parallel with diode D1 after connecting with capacitor C5, it is anti-for protection diode D1
It is only breakdown；
The working principle of the invention: alternating current converts alternating current to direct current by rectifier U1, passes through two pole of pressure stabilizing
DC voltage after pipe VD exports rectifier U1 is more stable, and the direct current of output passes through buffer protection circuit, inductance L1, electricity
Hold the buffer protection circuit that C1, capacitor C2, fuse FU, transformer T, diode D1, capacitor C5 and resistance R3 are constituted, utilizes electricity
Sense L1, capacitor C1, capacitor C2, diode D1, capacitor C5 and resistance R3 are formed by harmonic suppression circuit to the electricity of input power
Magnetic noise and noise signal are inhibited, and prevent to power supply disturbance, while being also prevented from power supply itself the high frequency spurs generated to electricity
Net interference；The safe operation of buffer circuit circuit is protected by fuse FU；Then pass through LC filter circuit, inductance L2 and capacitor
C3 forms LC filter circuit, and AC influence signal largely will be prevented to absorb by inductance L2 becomes magnetic strength and thermal energy, can inhibit
The effect of interference signal just obtains purer DC current in output end；Magnetic bead L3 connects with LC filter circuit, so both
The reflection function of LC filter circuit has been played, and has taken full advantage of magnetic bead L3 to the absorption function of ripple and noise jamming.
Above content is only to structure of the invention example and explanation, affiliated those skilled in the art couple
Described specific embodiment does various modifications or additions or is substituted in a similar manner, without departing from invention
Structure or beyond the scope defined by this claim, is within the scope of protection of the invention.
Claims (3)
1. a kind of supply harmonic suppressor with buffer protection circuit, including rectification circuit, buffer protection circuit, LC filtered electrical
Road and the second filter circuit, which is characterized in that the rectification circuit includes rectifier U1 and zener diode VD, the rectifier
1 foot of U1 and 3 feet access alternating current, and 2 feet of the rectifier U1 are connect with one end of zener diode VD, zener diode VD
The other end be connected with inductance L1,4 feet of rectifier U1 are connect with one end of inductance L1；
The buffer protection circuit includes inductance L1, capacitor C1, capacitor C2, fuse FU, transformer T, diode D1, capacitor C5
With resistance R3；One end of the inductance L1 is connected with capacitor C1, capacitor C2, capacitor C5, the anode of diode D1 and fuse FU
One end, the other end of capacitor C1 and the other end of capacitor C2 be simultaneously grounded after connecing, the one of the negative pole end of diode D1 and resistance R3
End is connected with transformer T first siding ring, and the other end of resistance R3 is connect with the other end of capacitor C5, side line of transformer T
The other end of circle is connect with the other end of fuse FU；
The LC filter circuit includes inductance L2 and capacitor C3, and one end of the inductance L2 is connected with transformer T second level lateral coil
One end, the other end of inductance L2 is connected with one end of capacitor C3 and magnetic bead L3；
Second filter circuit includes magnetic bead L3 and capacitor C4；The magnetic bead L3 other end accesses negative after connecting with one end of capacitor C4
One end of load；The other end of capacitor C4 accesses negative after connecting with the other end of the other end of capacitor C3, transformer T second level lateral coil
The other end of load.
2. a kind of supply harmonic suppressor with buffer protection circuit according to claim 1, which is characterized in that described
Capacitor C1, capacitor C2, capacitor C3 and capacitor C4 are filter capacitor, rectifier U1 model MB6S.
3. a kind of supply harmonic suppressor with buffer protection circuit according to claim 1, which is characterized in that described
Resistance R3 formation peak absorbance circuit in parallel with diode D1 after connecting with capacitor C5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398723.4A CN110048587B (en) | 2019-05-14 | 2019-05-14 | Power supply harmonic suppressor with buffer protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398723.4A CN110048587B (en) | 2019-05-14 | 2019-05-14 | Power supply harmonic suppressor with buffer protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110048587A true CN110048587A (en) | 2019-07-23 |
| CN110048587B CN110048587B (en) | 2021-07-13 |
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ID=67281947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910398723.4A Active CN110048587B (en) | 2019-05-14 | 2019-05-14 | Power supply harmonic suppressor with buffer protection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN110048587B (en) |
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| CN1801591A (en) * | 2005-01-08 | 2006-07-12 | 艾默生网络能源系统有限公司 | Improved inductive voltage clamping full-bridge soft switching circuit |
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| CN206135719U (en) * | 2016-09-21 | 2017-04-26 | 国网山东省电力公司青岛供电公司 | Exchange power management means of sampling module |
| CN106921303A (en) * | 2017-03-13 | 2017-07-04 | 成都秉德科技有限公司 | A kind of switching mode power supply transformer |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1801591A (en) * | 2005-01-08 | 2006-07-12 | 艾默生网络能源系统有限公司 | Improved inductive voltage clamping full-bridge soft switching circuit |
| CN101618472A (en) * | 2009-08-06 | 2010-01-06 | 唐山松下产业机器有限公司 | Soft switching inversion welding machine |
| CN202475288U (en) * | 2012-02-23 | 2012-10-03 | 浙江省检验检疫科学技术研究院 | Intelligent dust collector power supply system |
| CN102739062A (en) * | 2012-07-13 | 2012-10-17 | 深圳华意隆电气股份有限公司 | Zero-current and low-voltage switching inverter-type welding cutting power supply circuit |
| CN203747645U (en) * | 2013-12-28 | 2014-07-30 | 东莞市盈聚电子有限公司 | Power adapter circuit for voice products |
| CN204425198U (en) * | 2015-02-12 | 2015-06-24 | 东莞理工学院 | A kind of power-supplying circuit |
| CN205178905U (en) * | 2015-12-18 | 2016-04-20 | 吉林工业职业技术学院 | Adjustable constant voltage power supply of intelligence |
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| CN106921303A (en) * | 2017-03-13 | 2017-07-04 | 成都秉德科技有限公司 | A kind of switching mode power supply transformer |
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| Publication number | Publication date |
|---|---|
| CN110048587B (en) | 2021-07-13 |
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