CN204168130U - A kind of interchange inputs soft-start circuit - Google Patents
A kind of interchange inputs soft-start circuit Download PDFInfo
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- CN204168130U CN204168130U CN201420571693.5U CN201420571693U CN204168130U CN 204168130 U CN204168130 U CN 204168130U CN 201420571693 U CN201420571693 U CN 201420571693U CN 204168130 U CN204168130 U CN 204168130U
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Abstract
The utility model relates to AC power technical field, open a kind of interchange inputs soft-start circuit, comprises the first rectifier bridge (1), the first voltage-stabiliser tube (3), the first optocoupler (6), the first metal-oxide-semiconductor (7), the second metal-oxide-semiconductor (9), the first integrated transporting discharging (12), the second voltage-stabiliser tube (16) and thermistor PTC; The utility model utilizes the switching characteristic of metal-oxide-semiconductor and the metering function of thermistor PTC, effectively suppresses power-on surge electric current.Be applicable to high power switching power supply, easy to use, control accurately, can repetitive operation, reliability high, successful.
Description
Technical field
The utility model relates to AC power technical field, particularly relates to a kind of interchange and inputs soft-start circuit.
Background technology
Alternating current input power supplying particularly often adopts the filtering capacitor of larger capacity after high power switching power supply input rectifying.Momentary capacitance device two ends near short circuit is connected in power supply input, can produce large surge current like this, input fuse trip or air switch may be caused not to close, even damage power source internal device, affect the normal work of equipment.
Usually at power input designs soft-start circuit, be used for suppressing power-on surge current, ensure that power supply normally, reliably runs.Conventional surging current suppression method is connected in series negative tempperature coefficient thermistor NTC in circuit, but be applicable to power output more and be less than in the power supply of 200W, and start shooting immediately after shutdown, and NTC temperature is too high, can not effective surge current suppression again.Therefore the method restricted application of circuit connected in series NTC.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of novel interchange input soft-start circuit; be applicable to high power switching power supply, effectively suppress power-on surge electric current, protection power source internal components; improve the reliability of power supply, the safety of the electrical network of protection input simultaneously.
In order to realize the delay startup defencive function of above-mentioned requirements, the utility model have employed following technical scheme:
One of the present utility model exchanges input soft-start circuit, comprise the first rectifier bridge (1), first resistor (2), first voltage-stabiliser tube (3), second resistor (4), 3rd resistor (5), first optocoupler (6), first metal-oxide-semiconductor (7), 4th resistor (8), second metal-oxide-semiconductor (9), 5th resistor (10), 6th resistor (11), first integrated transporting discharging (12), 7th resistor (13), 8th resistor (14), 9th resistor (15), second voltage-stabiliser tube (16), first capacitor (17), second capacitor (18), three-phase alternating current input port L1, L2, L3, DC output end mouth+OUT,-OUT,
Wherein three-phase alternating current input port L1 holds with a of the first rectifier bridge (1) and is connected, three-phase alternating current input port L2 holds with the b of the first rectifier bridge (1) and is connected, three-phase alternating current input port L3 holds with the c of the first rectifier bridge (1) and is connected, the d end of the first rectifier bridge (1), the a end of the first resistance (2), the a end of the 5th resistor (10), the a end of the 7th resistor (13), the a end of the second capacitor (18) is connected with the anode+OUT of DC output end mouth, the e end of the first rectifier bridge (1), the b end of the first voltage-stabiliser tube (3), the b end of the first metal-oxide-semiconductor (13) is held with a of the 4th resistor (8) and is connected, the b end of the first resistance (2), the a end of the first voltage-stabiliser tube (3) is held with a of the 3rd resistor (5) and is connected, the a end of the first optocoupler (6) is held with a of the second resistor (4) and is connected, the b end of the first optocoupler (6) is held with the c of the second metal-oxide-semiconductor (9) and is connected, the c end of the first optocoupler (6) is held with the b of the 3rd resistor (5) and is connected, the d end of the first optocoupler (6) is held with a of the first metal-oxide-semiconductor (7) and is connected, a end of the first integrated transporting discharging (12), the b end of the second resistor (4), the b end of the 7th resistor (13), the a end of the 8th resistor (14), the a end of the second voltage-stabiliser tube (16) is held with a of the first capacitor (17) and is connected, the b end of the first integrated transporting discharging (12), the b end of the 5th resistor (10) is held with a of the 6th resistor (11) and is connected, the c end of the first integrated transporting discharging (12), the b end of the 8th resistor (14) is held with a of the 9th resistor (15) and is connected, and the d end of the first integrated transporting discharging (12) is held with a of the second metal-oxide-semiconductor (9) and is connected, the e end of the first integrated transporting discharging (12), the c end of the first metal-oxide-semiconductor (7), the b end of the 4th resistor (8), the b end of the second metal-oxide-semiconductor (9), the b end of the 6th resistor (11), the b end of the second voltage-stabiliser tube (16), the b end of the first capacitor (17), the b end of the second capacitor (18) is connected with the negative terminal-OUT of DC output end mouth,
Concrete described three-phase alternating current input port comprises ac input end mouth L1, L2, L3;
Concrete described DC output end mouth comprises DC output end mouth+OUT ,-OUT; + OUT, the i.e. anode of DC output end mouth;-OUT, the i.e. negative terminal of DC output end mouth;
The implication that a end of the first rectifier bridge (1), b end, c end, d end, e hold is: a end, b end, c hold three-phase alternating current input, and d end is direct current output plus terminal after rectification, and it is that after rectification, direct current exports negative terminal that e holds;
The implication that a end of the first optocoupler (6), b end, c end, d hold is: a end is the anode of optocoupler input, and b end is the negative terminal of optocoupler input, and it is the anode that optocoupler exports that c holds, and d end is the negative terminal that optocoupler exports;
The a end of the first voltage-stabiliser tube (3), the first voltage-stabiliser tube (16), the implication of b end are: a end is the negative electrode of voltage-stabiliser tube, and b end is the anode of voltage-stabiliser tube;
The implication that a end of the first metal-oxide-semiconductor (7), the second metal-oxide-semiconductor (9), b end, c hold is: a end is the grid of metal-oxide-semiconductor, and b end is the source electrode of metal-oxide-semiconductor, and c end is the drain electrode of metal-oxide-semiconductor;
The implication of a end of the first integrated transporting discharging (12), b end, c end, d end, e end is: output 1, the e end that input 1 anode that the power supply source that a end is integrated transporting discharging, b end are integrated transporting dischargings, c end are input 1 negative terminals of integrated transporting discharging, d end is integrated transporting discharging is reference of integrated transporting discharging;
The a end of the second capacitor (18), the implication of b end are: a end is the positive pole of electric capacity, and b end is the negative pole of electric capacity.
By adopting technique scheme, the utility model has following beneficial effect:
The one of the utility model design exchanges input soft-start circuit, surge current suppression in circuit of connecting after using switch element and current limiting element parallel connection.Switch element selects metal-oxide-semiconductor, and current limiting element selects semistor PTC.In circuit, booting moment, PTC plays metering function, and when voltage is increased to set point, metal-oxide-semiconductor conducting, bypasses PTC in PTC series connection.Utilize the switching characteristic of metal-oxide-semiconductor and the metering function of PTC, effectively suppress power-on surge electric current.
The utility model adopts metal-oxide-semiconductor and the rear series connection of thermistor parallel connection to reduce power supply start effect electric current in circuit, and successful, is applicable to high power switching power supply, not only protective circuit internal components, and the safety of protection input electrical network.Whole circuit is easy to use, control accurately, can repetitive operation, reliability high.
Accompanying drawing explanation
Fig. 1 is that the utility model exchanges input soft-start circuit schematic diagram.
In figure, 1-first rectifier bridge, 2-first resistor, 3-first voltage-stabiliser tube, 4-second resistor, 5-the 3rd resistor, 6-first optocoupler, 7-first metal-oxide-semiconductor, 8-the 4th resistor, 9-second metal-oxide-semiconductor, 10-the 5th resistor, 11-the 6th resistor, 12-first integrated transporting discharging, 13-the 7th resistor, 14-the 8th resistor, 15-the 9th resistor, 16-second voltage-stabiliser tube, 17-first capacitor, 18-second capacitor.
Embodiment
Below in conjunction with accompanying drawing, further explanation is explained to this patent.But the protection range of this patent is not limited to concrete execution mode.
Embodiment 1
As shown in Figure 1, one of the present utility model novel interchange input soft-start circuit, comprise the first rectifier bridge (1), first resistor (2), first voltage-stabiliser tube (3), second resistor (4), 3rd resistor (5), first optocoupler (6), first metal-oxide-semiconductor (7), 4th resistor (8), second metal-oxide-semiconductor (9), 5th resistor (10), 6th resistor (11), first integrated transporting discharging (12), 7th resistor (13), 8th resistor (14), 9th resistor (15), second voltage-stabiliser tube (16), first capacitor (17), second capacitor (18), three-phase alternating current input port L1, L2, L3, DC output end mouth+OUT,-OUT,
Wherein three-phase alternating current input port L1 holds with a of the first rectifier bridge (1) and is connected, three-phase alternating current input port L2 holds with the b of the first rectifier bridge (1) and is connected, three-phase alternating current input port L3 holds with the c of the first rectifier bridge (1) and is connected, the d end of the first rectifier bridge (1), the a end of the first resistance (2), the a end of the 5th resistor (10), the a end of the 7th resistor (13), the a end of the second capacitor (18) is connected with the anode+OUT of DC output end mouth, the e end of the first rectifier bridge (1), the b end of the first voltage-stabiliser tube (3), the b end of the first metal-oxide-semiconductor (13) is held with a of the 4th resistor (8) and is connected, the b end of the first resistance (2), the a end of the first voltage-stabiliser tube (3) is held with a of the 3rd resistor (5) and is connected, the a end of the first optocoupler (6) is held with a of the second resistor (4) and is connected, the b end of the first optocoupler (6) is held with the c of the second metal-oxide-semiconductor (9) and is connected, the c end of the first optocoupler (6) is held with the b of the 3rd resistor (5) and is connected, the d end of the first optocoupler (6) is held with a of the first metal-oxide-semiconductor (7) and is connected, a end of the first integrated transporting discharging (12), the b end of the second resistor (4), the b end of the 7th resistor (13), the a end of the 8th resistor (14), the a end of the second voltage-stabiliser tube (16) is held with a of the first capacitor (17) and is connected, the b end of the first integrated transporting discharging (12), the b end of the 5th resistor (10) is held with a of the 6th resistor (11) and is connected, the c end of the first integrated transporting discharging (12), the b end of the 8th resistor (14) is held with a of the 9th resistor (15) and is connected, and the d end of the first integrated transporting discharging (12) is held with a of the second metal-oxide-semiconductor (9) and is connected, the e end of the first integrated transporting discharging (12), the c end of the first metal-oxide-semiconductor (7), the b end of the 4th resistor (8), the b end of the second metal-oxide-semiconductor (9), the b end of the 6th resistor (11), the b end of the second voltage-stabiliser tube (16), the b end of the first capacitor (17), the b end of the second capacitor (18) is connected with the negative terminal-OUT of DC output end mouth,
Surge current suppression circuit of the present utility model, its working method is: interchange input soft-start circuit of the present utility model, its working method is: connect three-phase alternating voltage between three-phase alternating current input port L1, L2, L3, by output dc voltage after the first rectifier bridge (1) rectification, producing+15V boost voltage by the first resistor (2), the first voltage-stabiliser tube (3) is that the first metal-oxide-semiconductor (7) provides V
gSconducting voltage, producing+7.5V boost voltage by the 7th resistor (13), the second voltage-stabiliser tube (16) and the first capacitor (17) is that the first integrated transporting discharging (12) and the first optocoupler (6) provide voltage, producing 2.5V boost voltage after 8th resistor (14) and the 9th resistor (15) dividing potential drop, is that the first integrated transporting discharging (12) provides benchmark.
Three-phase alternating voltage moment is connected between three-phase alternating current input port L1, L2, L3, power supply is in under-voltage condition, the reference voltage that the voltage (i.e. the b terminal voltage of the first integrated transporting discharging (12)) produced after 5th resistor (10) and the 6th resistor (11) dividing potential drop is held lower than the c of the first integrated transporting discharging (12), therefore the d of the first integrated transporting discharging (12) holds output low level, second metal-oxide-semiconductor (9) not conducting, first optocoupler (6) also not conducting, the first metal-oxide-semiconductor (7) V
gSno-voltage, thus the first metal-oxide-semiconductor (7) is in cut-off state.Now main circuit current, by the 8th resistor (14) to the second capacitor (18).When the second capacitor (18) electric capacity rises to certain value, the reference voltage that the voltage (i.e. the b terminal voltage of the first integrated transporting discharging (12)) produced after 5th resistor (10) and the 6th resistor (11) dividing potential drop is held higher than the c of the first integrated transporting discharging (12), the d end of the first integrated transporting discharging (12) exports high level, second metal-oxide-semiconductor (9) conducting, first optocoupler (6) conducting, the first metal-oxide-semiconductor (7) V
gSthere is cut-in voltage, thus the first metal-oxide-semiconductor (7) conducting.Bypassed by 8th resistor (14), the electric current of major loop mainly flows through the first metal-oxide-semiconductor (7).In circuit, adopt the thermistor PTC of positive temperature coefficient, temperature is higher, and resistance is larger, a metering function in 8th resistor (14) series connection, and current limit when making start in loop, within safe current, effectively reduces the impact of surge current to circuit.
Claims (4)
1. exchange an input soft-start circuit, it is characterized in that: comprise the first rectifier bridge (1), the first voltage-stabiliser tube (3), the first optocoupler (6), the first metal-oxide-semiconductor (7), the second metal-oxide-semiconductor (9), the first integrated transporting discharging (12), the second voltage-stabiliser tube (16), three-phase alternating current input port L1, L2, L3, DC output end mouth+OUT ,-OUT;
Wherein three-phase alternating current input port L1 holds with a of the first rectifier bridge (1) and is connected, three-phase alternating current input port L2 holds with the b of the first rectifier bridge (1) and is connected, three-phase alternating current input port L3 holds with the c of the first rectifier bridge (1) and is connected, the d end of the first rectifier bridge (1), the a end of the first resistance (2), the a end of the 5th resistor (10), the a end of the 7th resistor (13), the a end of the second capacitor (18) is connected with the anode+OUT of DC output end mouth, the e end of the first rectifier bridge (1), the b end of the first voltage-stabiliser tube (3), the b end of the first metal-oxide-semiconductor (13) is held with a of the 4th resistor (8) and is connected, the b end of the first resistance (2), the a end of the first voltage-stabiliser tube (3) is held with a of the 3rd resistor (5) and is connected, the a end of the first optocoupler (6) is held with a of the second resistor (4) and is connected, the b end of the first optocoupler (6) is held with the c of the second metal-oxide-semiconductor (9) and is connected, the c end of the first optocoupler (6) is held with the b of the 3rd resistor (5) and is connected, the d end of the first optocoupler (6) is held with a of the first metal-oxide-semiconductor (7) and is connected, a end of the first integrated transporting discharging (12), the b end of the second resistor (4), the b end of the 7th resistor (13), the a end of the 8th resistor (14), the a end of the second voltage-stabiliser tube (16) is held with a of the first capacitor (17) and is connected, the b end of the first integrated transporting discharging (12), the b end of the 5th resistor (10) is held with a of the 6th resistor (11) and is connected, the c end of the first integrated transporting discharging (12), the b end of the 8th resistor (14) is held with a of the 9th resistor (15) and is connected, and the d end of the first integrated transporting discharging (12) is held with a of the second metal-oxide-semiconductor (9) and is connected, the e end of the first integrated transporting discharging (12), the c end of the first metal-oxide-semiconductor (7), the b end of the 4th resistor (8), the b end of the second metal-oxide-semiconductor (9), the b end of the 6th resistor (11), the b end of the second voltage-stabiliser tube (16), the b end of the first capacitor (17), the b end of the second capacitor (18) is connected with the negative terminal-OUT of DC output end mouth.
2. one according to claim 1 exchanges input soft-start circuit, it is characterized in that: described three-phase alternating current input port comprises ac input end mouth L1, L2, L3.
3. one according to claim 1 exchanges input soft-start circuit, it is characterized in that: described DC output end mouth comprises DC output end mouth+OUT ,-OUT; + OUT, the i.e. anode of DC output end mouth;-OUT, the i.e. negative terminal of DC output end mouth.
4. one according to claim 1 exchanges input soft-start circuit, it is characterized in that: the implication that a end of described the first rectifier bridge (1), b end, c end, d end, e hold is: a end, b end, c hold three-phase alternating current input, d end is direct current output plus terminal after rectification, and e end is that after rectification, direct current exports negative terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571693.5U CN204168130U (en) | 2014-09-30 | 2014-09-30 | A kind of interchange inputs soft-start circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571693.5U CN204168130U (en) | 2014-09-30 | 2014-09-30 | A kind of interchange inputs soft-start circuit |
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| Publication Number | Publication Date |
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| CN204168130U true CN204168130U (en) | 2015-02-18 |
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| CN201420571693.5U Expired - Fee Related CN204168130U (en) | 2014-09-30 | 2014-09-30 | A kind of interchange inputs soft-start circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471242A (en) * | 2016-01-07 | 2016-04-06 | 广东工业大学 | Novel power-on surge current suppression circuit |
| CN112423440A (en) * | 2020-11-10 | 2021-02-26 | 珠海银河智能电网有限公司 | Indicating lamp circuit, control method and device, power supply equipment and storage medium |
-
2014
- 2014-09-30 CN CN201420571693.5U patent/CN204168130U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471242A (en) * | 2016-01-07 | 2016-04-06 | 广东工业大学 | Novel power-on surge current suppression circuit |
| CN105471242B (en) * | 2016-01-07 | 2018-02-02 | 广东工业大学 | A kind of electric surge current suppression circuit |
| CN112423440A (en) * | 2020-11-10 | 2021-02-26 | 珠海银河智能电网有限公司 | Indicating lamp circuit, control method and device, power supply equipment and storage medium |
| CN112423440B (en) * | 2020-11-10 | 2023-10-20 | 珠海银河智能电网有限公司 | Indicator light circuit, control method and device, power supply equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20190930 |