CN109217273A - One kind turning off the power switch undelayed anti-surge circuit - Google Patents
One kind turning off the power switch undelayed anti-surge circuit Download PDFInfo
- Publication number
- CN109217273A CN109217273A CN201811383053.0A CN201811383053A CN109217273A CN 109217273 A CN109217273 A CN 109217273A CN 201811383053 A CN201811383053 A CN 201811383053A CN 109217273 A CN109217273 A CN 109217273A
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- Prior art keywords
- circuit
- connecting pin
- switch
- switching tube
- surge
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- 239000003990 capacitor Substances 0.000 claims description 7
- 238000011045 prefiltration Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- CVOFKRWYWCSDMA-UHFFFAOYSA-N 2-chloro-n-(2,6-diethylphenyl)-n-(methoxymethyl)acetamide;2,6-dinitro-n,n-dipropyl-4-(trifluoromethyl)aniline Chemical compound CCC1=CC=CC(CC)=C1N(COC)C(=O)CCl.CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O CVOFKRWYWCSDMA-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention discloses one kind and turns off the power switch undelayed anti-surge circuit, include three connecting pins, first connecting pin is connected to one end of the input terminal of rectification circuit, and second connection end is connected to one end of relay switch relay coil, and third connecting pin is connected to ground terminal GND.Switching tube Q7 is connected between second connection end and third connecting pin, switching tube Q7 is driven by the voltage of the first connecting pin.The present invention, which can effectively solve, turns off the power switch the excessive the problem of damaging the machine of inrush current when opening again at once.
Description
Technical field
The present invention relates to power-supply device technical fields, and in particular to the anti-surge circuit of power-supply device.
Background technique
Surge in power-supply device is caused when mainly being switched by switches of power system, and the generation of surge will bring energy
Huge transient or overcurrent, energy can burn whole devices on connection transmission line in moment, very harmful therefore anti-
The reliability of surge circuit is extremely important for power-supply device.
Traditional Anti-surging scheme is as follows:
Traditional scheme 1 limits moment impact electric current as shown in Figure 1, thermistor R1 is arranged between switch and rectification circuit, should
The defect of design is, when inputting high current, switch will select high-current switch, and high-current switch installation is inconvenient, in addition grows
Time aging thermistor fever resistance value becomes smaller, and the surge current of input can become larger, and machine is easy to damage, this scheme is only suitable for small function
Rate circuit.
Traditional scheme 2 is as shown in Fig. 2, this scheme is suitable for high-power circuit.When switch S1 closure, voltage passes through
The resistance value size of R1, R2 thermistor limits moment impact electric current, gives C3 capacitor charging when output voltage is rectified by D1, works as C3
Charging complete proportionately when, T1 just have voltage 12V output, 12V voltage control relay K1, K2 work, wait when the switch is closed,
Since C3 capacitor stored voltage is not that can discharge moment, C3 has voltage, and 12V relay cannot immediately close off, if after
Electric appliance does not turn off at once, then next cycle turns on the switch again, voltage is just walked from relay, and inrush current becomes larger,
Lead to machine breakdown, thermistor cannot play the booting limitation function of current.
Number of patent application 201320494430.4 disclose it is a kind of for inhibiting the control circuit of surge current, such as Fig. 3, should
Scheme inhibits immediate current to C2 capacitor charging below by R6, then is charged by resistance R1, R2, R3 to C3.When voltage arrives
When driving Q2, relay is just closed；However when power remove, due to C2 capacitive reasons, relay will not be immediately closed off and opened
It closes, if this when turns on the switch again, does not just have inhibition booting dash current and act on, this scheme is equal to above-mentioned introduction
Traditional 2 schemes are able to solve electronic equipment and routinely start surge heavy current impact caused by moment, but not can effectively solve pass
Make and break pass turns on the switch moment impact current problems again at once.
Summary of the invention
It is an object of the invention to overcome prior art defect, a kind of anti-surge circuit is provided, effectively solution power switch
Close delay and thus bring high current surge problem.
The present invention adopts the following technical scheme:
A kind of closing anti-surge circuit of the power supply without switching delay, it is characterised in that include:
First connecting pin is connected to one end of the input terminal of power rectifier circuit；
Second connection end is connected to one end of power supply relay switch coil；
Third connecting pin, is connected to ground terminal；
Be connected with a switching tube between the second connection end and third connecting pin, the switching tube by the first connecting pin voltage
Driving.
The present invention also provides the Switching Power Supplies comprising above-mentioned anti-surge circuit.
Anti-surge circuit of the invention suitable for the occasion of low current switch control high current input, and switchs closing
When can non-delay closing relay switch, can effectively solve and turn off the power switch inrush current mistake when opening again at once
Big the problem of damaging the machine.
Detailed description of the invention
Fig. 1 is the schematic diagram of traditional Anti-surging scheme 1；
Fig. 2 is the schematic diagram of traditional Anti-surging scheme 2；
Fig. 3 is existing a kind of for inhibiting the control circuit of surge current；
Fig. 4 is the schematic diagram of anti-surge circuit of the present invention.
Specific embodiment
As shown in figure 4, the present embodiment provides a kind of anti-surge circuit, can when power switch is closed it is non-delay close after
Electric switch effectively inhibits the impact of surge current.
Switching Power Supply is mainly made of pre-filter circuit, switching circuit, rectification circuit and transformer circuit.Switching circuit
It is connected in the AC line of rectification circuit input side, comprising two groups of switches in parallel, wherein one group is power switch S1, S1 connection
There are thermistor R1, R2.Another group is relay switch K1, K2, is connected in AC line, K1, K2 coil are by transformer
Circuit power supply.Rectification circuit is realized that the output end of rectifier bridge D1 is through capacitor C3 connection transformer circuit by rectifier bridge D1.Transformer
Circuit includes transformer T1 and T2, wherein transformer T1 is used for relay switch K1, K2 coil power supply (12V), transformer T2
Output be Switching Power Supply voltage output VOUT.
Anti-surge circuit includes three connecting pins, and the first connecting pin is connected to one end of the input terminal of rectification circuit, and second
Connecting pin is connected to the negative terminal of relay switch relay coil, and third connecting pin is connected to ground terminal GND.Second connection end and
Switching tube Q7 is connected between third connecting pin, switching tube Q7 is driven by the voltage of the first connecting pin.Switching tube Q7 is triode,
Its collector connects second connection end, and emitter connects third connecting pin, and base stage is connected to the first connection through resistance R 3, R 5
End.Be connected with RC filter circuit between the base stage and emitter of switching tube Q7, emitter and resistance R 3, R 5 series connection point it
Between be parallel with a zener diode D2 and a capacitor C5.
Anti-surging principle of the present invention is as follows:
Switch S1 closure limits inrush current by thermistor R1, R2, and input voltage is led by R5, R3 driving triode Q7
It is logical.D1 charges to capacitor C3, and when C3 charging complete, T1 exports 12V voltage, and relay switch K1, K2 closure is defeated to rectifying below
Out.When switch S1 is disconnected, R5 at once without voltage, close by Q7 moment, the non-delay disconnection of relay, without voltage output.When again
When closure switch S1, voltage, which is still first flowed through from thermistor, inhibits moment starup current, then passes through R5, R3 driving triode
Q7 makes relay work, can make switching on and shutting down each time that can effectively inhibit immediate current, reduces booting dash current
It is excessive, lead to circuit damage.
Claims (6)
1. a kind of closing anti-surge circuit of the power supply without switching delay, it is characterised in that include:
First connecting pin is connected to one end of the input terminal of power rectifier circuit；
Second connection end is connected to one end of power supply relay switch coil；
Third connecting pin, is connected to ground terminal；
Be connected with a switching tube between the second connection end and third connecting pin, the switching tube by the first connecting pin voltage
Driving.
2. anti-surge circuit as described in claim 1, it is characterised in that the switching tube is triode, and collector connects institute
Second connection end is stated, emitter connects the third connecting pin, and base stage is connected to first connecting pin through resistance.
3. anti-surge circuit as claimed in claim 2, it is characterised in that connected between the base stage and emitter of the switching tube
There is RC filter circuit.
4. anti-surge circuit as claimed in claim 2, it is characterised in that between the base stage of the switching tube and the first connecting pin
There are two resistance for series connection, and a zener diode and one are parallel between the emitter of switching tube and the series connection point of two resistance
Capacitor.
5. a kind of Switching Power Supply, it is characterised in that including any anti-surge circuit of claim 1 ~ 4.
6. Switching Power Supply as claimed in claim 5, it is characterised in that including sequentially connected pre-filter circuit, switch electricity
Road, rectification circuit and transformer circuit, the switching circuit are connected in the AC line of rectification circuit input side, simultaneously comprising two groups
The switch of connection: wherein one group is power switch, is connected with thermistor；Another group is relay switch, and relay coil is by becoming
Transformer circuits power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383053.0A CN109217273A (en) | 2018-11-20 | 2018-11-20 | One kind turning off the power switch undelayed anti-surge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383053.0A CN109217273A (en) | 2018-11-20 | 2018-11-20 | One kind turning off the power switch undelayed anti-surge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109217273A true CN109217273A (en) | 2019-01-15 |
Family
ID=64993899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811383053.0A Pending CN109217273A (en) | 2018-11-20 | 2018-11-20 | One kind turning off the power switch undelayed anti-surge circuit |
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| Country | Link |
|---|---|
| CN (1) | CN109217273A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110022053A (en) * | 2019-03-29 | 2019-07-16 | 合肥华耀电子工业有限公司 | It is a kind of to inhibit the three phase rectifier of function to protect circuit with inrush current |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08107674A (en) * | 1994-10-04 | 1996-04-23 | Sony Corp | Switching power circuit |
| CN101453658A (en) * | 2008-12-26 | 2009-06-10 | 深圳创维－Rgb电子有限公司 | Degaussing control circuit, degaussing control apparatus and television set |
| CN102710149A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | Anti-surging switching power supply and corresponding light emitting diode (LED) driving circuit |
| CN102931647A (en) * | 2011-08-10 | 2013-02-13 | 海洋王照明科技股份有限公司 | Surge current suppression circuit and lamp |
| CN203632542U (en) * | 2013-11-18 | 2014-06-04 | 肖志明 | Soft-start electronic switching circuit |
| CN104104075A (en) * | 2013-04-11 | 2014-10-15 | 海洋王（东莞）照明科技有限公司 | Anti-surge circuit |
| CN208015581U (en) * | 2018-04-13 | 2018-10-26 | 成都华普电器有限公司 | A kind of simple power-on surge current suppressing circuit |
| CN209267167U (en) * | 2018-11-20 | 2019-08-16 | 艾乐德电子（南京）有限公司 | One kind turning off the power switch undelayed anti-surge circuit and Switching Power Supply |
-
2018
- 2018-11-20 CN CN201811383053.0A patent/CN109217273A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08107674A (en) * | 1994-10-04 | 1996-04-23 | Sony Corp | Switching power circuit |
| CN101453658A (en) * | 2008-12-26 | 2009-06-10 | 深圳创维－Rgb电子有限公司 | Degaussing control circuit, degaussing control apparatus and television set |
| CN102710149A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | Anti-surging switching power supply and corresponding light emitting diode (LED) driving circuit |
| CN102931647A (en) * | 2011-08-10 | 2013-02-13 | 海洋王照明科技股份有限公司 | Surge current suppression circuit and lamp |
| CN104104075A (en) * | 2013-04-11 | 2014-10-15 | 海洋王（东莞）照明科技有限公司 | Anti-surge circuit |
| CN203632542U (en) * | 2013-11-18 | 2014-06-04 | 肖志明 | Soft-start electronic switching circuit |
| CN208015581U (en) * | 2018-04-13 | 2018-10-26 | 成都华普电器有限公司 | A kind of simple power-on surge current suppressing circuit |
| CN209267167U (en) * | 2018-11-20 | 2019-08-16 | 艾乐德电子（南京）有限公司 | One kind turning off the power switch undelayed anti-surge circuit and Switching Power Supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110022053A (en) * | 2019-03-29 | 2019-07-16 | 合肥华耀电子工业有限公司 | It is a kind of to inhibit the three phase rectifier of function to protect circuit with inrush current |
| CN110022053B (en) * | 2019-03-29 | 2024-03-29 | 合肥华耀电子工业有限公司 | Three-phase rectification protection circuit with input surge current suppression function |
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