CN206211836U - A kind of electromagnetic interference filter circuit of novel belt Anti-surging impact - Google Patents
A kind of electromagnetic interference filter circuit of novel belt Anti-surging impact Download PDFInfo
- Publication number
- CN206211836U CN206211836U CN201621299135.3U CN201621299135U CN206211836U CN 206211836 U CN206211836 U CN 206211836U CN 201621299135 U CN201621299135 U CN 201621299135U CN 206211836 U CN206211836 U CN 206211836U
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- transformer
- filtration module
- electric capacity
- parallel
- rectification input
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a kind of electromagnetic interference filter circuit of novel belt Anti-surging impact, filtration module is set before rectification input, and is arranged in series a negative temperature coefficient resistor on a main line between filtration module and rectification input.Advantage is the Traditional Thinking for changing parallel connection thermistor in the past, and surge current can be prevented with more efficient using tandem.Being set by simple element can realize the front end circuit of low cost and efficient electromagnetism interference and Anti-surging.The precision elements such as the CUP of high value are protected, the stability of system is improved.
Description
Technical field
The utility model is related to a kind of electronic circuit, more particularly to the EMI Filtering that a kind of novel belt Anti-surging impacts
Circuit.
Background technology
With the development and technological progress of society, various electronic products and various consumer electronicses largely occur, enter into
In people's daily life and production work.Switching Power Supply as a kind of multiple power source, be various electronics miniaturizations and it is low into
This change must be small a kind of power mode, it has also become current main flow power supply, be the features such as with its light, thin, small and high efficiency
People is familiar with, but brings a variety of harm of noise jamming simultaneously, and its conducted noise, radiated noise can involve whole machine safety, have
When can disturb some cpu instructions, cause the maloperation of system, can also cause the subversiveness of system to destroy when serious, while power network
Fluctuation produce very big inrush current shock when can cause power initiation, easily cause damage of product.
Utility model content
In order to solve the above-mentioned technical problem, the utility model purpose is to provide a kind of electromagnetism of novel belt Anti-surging impact
Interference filter circuit.
A kind of electromagnetic interference filter circuit of novel belt Anti-surging impact described in the utility model, it is characterised in that
Filtration module is set before rectification input, and a subzero temperature system is arranged in series on a main line between filtration module and rectification input
Number resistor.
Preferably, described negative temperature coefficient resistor is thermistor.
Preferably, described filtration module includes first, second, third electric capacity and transformer；Described transformer input
To male connector, output end connection rectification input, the first electric capacity is connected in parallel on transformer inputs at end, and second and the 3rd after capacitance series
It is connected in parallel on transformer output end.
Preferably, the 6th electric capacity is concatenated between the 2nd the 3rd described capacitance connection point and ground connection.
Preferably, described one RC being made up of the 4th electric capacity, the first and second resistance of transformer output end parallel connection is simultaneously
Connection circuit.
Preferably, it is arranged in series a reactance on a main line between described filtration module and rectification input；The electricity
Anti- two inputs for being connected rectification input respectively with negative temperature coefficient resistor.
The utility model advantage is the Traditional Thinking for changing parallel connection thermistor in the past, can be more using tandem
Surge current is prevented added with effect.Being set by simple element can realize low cost and efficiently electromagnetism interference and Anti-surging
Front end circuit.The precision elements such as the CUP of high value are protected, the stability of system is improved.
Brief description of the drawings
Fig. 1 is the structural representation of circuit described in the utility model.
Specific embodiment
The electromagnetic interference filter circuit of novel belt Anti-surging impact described in the utility model, as shown in figure 1, including electric capacity
C1-C6, resistance R1, R2, reactance L1, thermistor V1, rectifier D1 and transformer T1.Described transformer T1 inputs are external
Plug, output end connection rectification D1 inputs, the first electric capacity C1 is connected in parallel on transformer T1 inputs, the electric capacity C3 of the second electric capacity C2 the 3rd
The double π type filtration modules of transformer T1 output ends composition are connected in parallel on after concatenation.The filtration module is mainly the electricity to input power
Magnetic noise and noise signal are suppressed, and are prevented to power supply disturbance, while being also prevented from high frequency spurs that power supply produces in itself to electricity
Net interference.In order to strengthen anti-jamming effectiveness, can be concatenated between the second described electric capacity C2, the 3rd electric capacity C3 tie points and ground connection
6th electric capacity C6.Also can be in described transformer T1 output ends parallel connection one by the 4th electric capacity C4, first and second resistance R1, R2
The RC parallel circuits of composition.Then it is arranged in series a thermistor on a main line between filtration module and rectification D1 inputs
V1 and reactance L1, the reactance L1 and thermistor V1 are connected two inputs of rectification input respectively.
Circuit operation principle described in the utility model is：When electric power starting moment, circuit will charge to the 5th electric capacity C5,
Because immediate current is big, concatenation thermistor V1 just can effectively prevent surge current.Because instantaneous energy totally disappeared consumption in temperature-sensitive electricity
On resistance V1, thermistor V1 resistances reduce (V1 is negative temperature coefficient element) after temperature is raised after certain hour, and at this moment it is consumed
Energy is very small, and late-class circuit can normal work.
For a person skilled in the art, technical scheme that can be as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the guarantor that should all belong to the utility model claim
Within the scope of shield.
Claims (6)
1. the electromagnetic interference filter circuit that a kind of novel belt Anti-surging impacts, it is characterised in that filtering is set before rectification input
Module, and it is arranged in series a negative temperature coefficient resistor on a main line between filtration module and rectification input.
2. circuit according to claim 1, it is characterised in that described filtration module includes first, second, third electric capacity
And transformer；Described transformer inputs are input into male connector, output end connection rectification, and it is defeated that the first electric capacity is connected in parallel on transformer
Enter end, second and the 3rd are connected in parallel on transformer output end after capacitance series.
3. circuit according to claim 2, it is characterised in that gone here and there between the 2nd the 3rd described capacitance connection point and ground connection
Connect the 6th electric capacity.
4. circuit according to claim 2, it is characterised in that one in parallel of described transformer output end is by the 4th electricity
The RC parallel circuits of appearance, the first and second resistance composition.
5. circuit according to claim 1, it is characterised in that between described described filtration module and rectification input
A reactance is arranged in series on bar main line；The reactance is connected two inputs of rectification input with negative temperature coefficient resistor respectively
End.
6. according to any described circuits of claim 1-5, it is characterised in that described negative temperature coefficient resistor is temperature-sensitive electricity
Resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621299135.3U CN206211836U (en) | 2016-11-30 | 2016-11-30 | A kind of electromagnetic interference filter circuit of novel belt Anti-surging impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621299135.3U CN206211836U (en) | 2016-11-30 | 2016-11-30 | A kind of electromagnetic interference filter circuit of novel belt Anti-surging impact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211836U true CN206211836U (en) | 2017-05-31 |
Family
ID=58751019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621299135.3U Expired - Fee Related CN206211836U (en) | 2016-11-30 | 2016-11-30 | A kind of electromagnetic interference filter circuit of novel belt Anti-surging impact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206211836U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911035A (en) * | 2017-12-12 | 2018-04-13 | 成都互聚科技有限公司 | A kind of power-supply system using more piece π types RC filtering outputs |
-
2016
- 2016-11-30 CN CN201621299135.3U patent/CN206211836U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911035A (en) * | 2017-12-12 | 2018-04-13 | 成都互聚科技有限公司 | A kind of power-supply system using more piece π types RC filtering outputs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Qiu Zijian Inventor before: Qiu Zijian |
|
| CB03 | Change of inventor or designer information | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20181130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |