CN204441876U - A kind of low-power consumption leadage circuit of AC power - Google Patents
A kind of low-power consumption leadage circuit of AC power Download PDFInfo
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- CN204441876U CN204441876U CN201420611358.3U CN201420611358U CN204441876U CN 204441876 U CN204441876 U CN 204441876U CN 201420611358 U CN201420611358 U CN 201420611358U CN 204441876 U CN204441876 U CN 204441876U
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- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 230000005669 field effect Effects 0.000 claims description 35
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
Abstract
The utility model relates to a kind of low-power consumption leadage circuit of AC power, comprise the detecting unit, comparing unit machine and the performance element that connect successively, the detection input of described detecting unit is connected with the AC signal input part of AC power, and output is connected with the input of comparing unit; The output of comparing unit is connected with the input control end of performance element, and the electric discharge input of performance element is connected with the output of the electrochemical capacitor of AC power.The utility model detects the ac input signal of AC power by arranging leadage circuit, when AC power normally works, leadage circuit does not work, do not produce power consumption, when the AC input power down of AC power, the electricity of the electrochemical capacitor of AC power is released by leadage circuit fast, produces dangerous when after avoiding AC power power down, maintenance personal operates, improve the safety and reliability of AC power, and leadage circuit structure is simple, cost is low, is beneficial to and applies.
Description
Technical field
The utility model relates to AC power discharge technology field, is specifically related to a kind of low-power consumption leadage circuit of AC power.
Background technology
Interchange (AC) power circuit of flyback topologies (Flyback) structure has low cost and the simple feature of debugging due to it, in the daily life electronic product of middle low power, have extensive application.The AC power circuit of described flyback topologies (Flyback) structure comprises the AC signal input part, rectifier bridge, the jumbo electrochemical capacitor that connect successively.Jumbo electrochemical capacitor is alleviating due to load after the power-off of AC signal input part, and the release of the electricity that electrochemical capacitor stores through the long period just can be discharged into below human safety voltage.On the one hand, the release of electrochemical capacitor voltage not in time, easily threatens the life security of maintenance personal, on the other hand, in complete machine application, because load time standby is lighter when closing AC power supplies under waiting condition, standby indicating lamp then can continue the longer time, causes misunderstanding to user.
In order to solve the problem, the means adopted at present usually arrange a small resistor and jumbo electrochemical capacitor is connected in parallel.The electricity stored to make electrochemical capacitor discharges fast after the power-off of AC signal input part, and small resistor resistance in parallel is with it enough little.But when AC power supplies normally works, this small resistor is always in running order, need to consume larger power consumption; When holding state, this small resistor is also in running order, and power consumption be not less than 0.5W.
Utility model content
The purpose of this utility model overcomes shortcomings and deficiencies of the prior art, there is provided a kind of low-power consumption leadage circuit of AC power, when AC power power-off, the electricity of electrochemical capacitor discharges by leadage circuit fast, when AC power normally works, leadage circuit is consumed power not.
The purpose of this utility model is achieved through the following technical solutions: a kind of low-power consumption leadage circuit of AC power, comprise the detecting unit, comparing unit machine and the performance element that connect successively, the detection input of described detecting unit is connected with the AC signal input part of AC power, and output is connected with the input of comparing unit; The output of comparing unit is connected with the input control end of performance element, and the electric discharge input of performance element is connected with the output of the electrochemical capacitor of AC power.
Particularly, described detecting unit comprises electric capacity C01, resistance R01, voltage stabilizing didoe D01, diode D02, resistance R02, electric capacity C02, field effect transistor Q01, one end of described electric capacity C01 is connected with the live wire of AC power AC signal input part as the input of detecting unit, connects the positive pole of diode D01 and the negative pole of voltage stabilizing didoe D01 after other end series resistance R01; One end of the negative pole connecting resistance R02 of diode D02, the other end of resistance R02 and the equal ground connection of positive pole of voltage stabilizing didoe D01; Electric capacity C02 and resistance R02 is connected in parallel, and the drain electrode of field effect transistor Q01 meets direct voltage VCC, and grid connects the negative pole of diode D02, and source electrode is connected with the input of comparing unit as the output of detecting unit.
Particularly, described comparing unit comprises resistance R03 and resistance R04, ground connection after one end series resistance R04 of resistance R03, and the other end is connected with the source electrode of field effect transistor Q01 as the input of comparing unit; Resistance R03 is connected with the input control end of performance element as the output of comparing unit with the node of resistance R04.
Particularly, described performance element comprises field effect transistor Q02 and resistance R05, ground connection after the source series resistance R05 of described field effect transistor Q02, grid is connected with the node between resistance R03 and resistance R04 as the input control end of performance element, and the electric discharge input drained as performance element is connected with the electrochemical capacitor of AC power.
Particularly, described field effect transistor Q01 is N channel field-effect pipe.
Particularly, described field effect transistor Q02 is P-channel field-effect transistor (PEFT) pipe.
Described detecting unit detects the AC signal of AC power AC signal input part.When AC power normally works, the grid of field effect transistor Q01 is high level, and field effect transistor Q01 is in cut-off state, field effect transistor Q02 is also in cut-off state, now leadage circuit does not work, and does not produce power consumption, does not also affect the normal work of electrochemical capacitor C1 in AC power circuit.When the AC signal input part power-off of AC power or incoming level are lower than voltage threshold V0 (value of V0 is determined by the size of the parameter of the element in detecting unit and the direct voltage VCC of input), effect pipe Q01 is in conducting state, through the dividing potential drop of resistance R03 and resistance R04, field effect transistor Q02 is also in conducting state, the voltage of electrochemical capacitor C1 discharges through resistance R05, realizes repid discharge.
The utility model comprises following advantage and beneficial effect compared to existing technology:
The utility model detects the ac input signal of AC power by arranging leadage circuit, when AC power normally works, leadage circuit does not work, do not produce power consumption, when the power down of AC input or brownout (the product introduction holding state) of AC power, the electricity of the electrochemical capacitor of AC power is released by leadage circuit fast, produce dangerous when after avoiding AC power power down, maintenance personal operates, improve the safety and reliability of AC power, and leadage circuit structure is simple, cost is low, is beneficial to and applies.
Accompanying drawing explanation
Fig. 1 is the application principle block diagram of the low-power consumption leadage circuit of AC power in embodiment;
Fig. 2 is the application circuit schematic diagram of the low-power consumption leadage circuit of AC power in embodiment.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, a kind of low-power consumption leadage circuit of AC power, comprise the detecting unit, comparing unit machine and the performance element that connect successively, the detection input of described detecting unit is connected with the AC signal input part of AC power, and output is connected with the input of comparing unit; The output of comparing unit is connected with the input control end of performance element, and the electric discharge input of performance element is connected with the output of the electrochemical capacitor of AC power.Described leadage circuit is applied to the AC power of flyback topologies structure.Described AC power comprises the AC signal input part, rectifier bridge and the jumbo electrochemical capacitor that connect successively.
As shown in Figure 2, described detecting unit comprises electric capacity C01, resistance R01, voltage stabilizing didoe D01, diode D02, resistance R02, electric capacity C02, field effect transistor Q01, one end of described electric capacity C01 is connected with the live wire of AC power AC signal input part as the input of detecting unit, connects the positive pole of diode D01 and the negative pole of voltage stabilizing didoe D01 after other end series resistance R01; One end of the negative pole connecting resistance R02 of diode D02, the other end of resistance R02 and the equal ground connection of positive pole of voltage stabilizing didoe D01; Electric capacity C02 and resistance R02 is connected in parallel, and the drain electrode of field effect transistor Q01 meets direct voltage VCC, and grid connects the negative pole of diode D02, and source electrode is connected with the input of comparing unit as the output of detecting unit.Described comparing unit comprises resistance R03 and resistance R04, ground connection after one end series resistance R04 of resistance R03, and the other end is connected with the source electrode of field effect transistor Q01 as the input of comparing unit; Resistance R03 is connected with the input control end of performance element as the output of comparing unit with the node of resistance R04.Described performance element comprises field effect transistor Q02 and resistance R05, ground connection after the source series resistance R05 of described field effect transistor Q02, grid is connected with the node between resistance R03 and resistance R04 as the input control end of performance element, and the electric discharge input Vbus drained as performance element is connected with the electrochemical capacitor C1 of AC power.Described field effect transistor Q01 is N channel enhancement field effect transistor, and described field effect transistor Q02 is P-channel enhancement type field effect transistor.
Described detecting unit detects the AC signal of AC power AC signal input part.When AC power normally works, the grid of field effect transistor Q01 is high level, and field effect transistor Q01 is in cut-off state, field effect transistor Q02 is also in cut-off state, now leadage circuit does not work, and does not produce power consumption, does not also affect the normal work of electrochemical capacitor C1 in AC power circuit.When the AC signal input part power-off of AC power or incoming level are lower than voltage threshold V0 (value of V0 is determined by the size of the parameter of the element in detecting unit and the direct voltage VCC of input), effect pipe Q01 is in conducting state, through the dividing potential drop of resistance R03 and resistance R04, field effect transistor Q02 is also in conducting state, the voltage of electrochemical capacitor C1 discharges through resistance R05, realizes repid discharge.The parameter of the element in comparison circuit determines that the threshold voltage of performance element work, the parameter of resistance R05 determine the velocity of discharge of electrochemical capacitor C1.
The above embodiment only have expressed execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (6)
1. the low-power consumption leadage circuit of an AC power, it is characterized in that: comprise the detecting unit, comparing unit machine and the performance element that connect successively, the detection input of described detecting unit is connected with the AC signal input part of AC power, and output is connected with the input of comparing unit; The output of comparing unit is connected with the input control end of performance element, and the electric discharge input of performance element is connected with the output of the electrochemical capacitor of AC power.
2. the low-power consumption leadage circuit of AC power according to claim 1, it is characterized in that: described detecting unit comprises electric capacity C01, resistance R01, voltage stabilizing didoe D01, diode D02, resistance R02, electric capacity C02, field effect transistor Q01, one end of described electric capacity C01 is connected with the live wire of AC power AC signal input part as the input of detecting unit, connects the positive pole of diode D01 and the negative pole of voltage stabilizing didoe D01 after other end series resistance R01; One end of the negative pole connecting resistance R02 of diode D02, the other end of resistance R02 and the equal ground connection of positive pole of voltage stabilizing didoe D01; Electric capacity C02 and resistance R02 is connected in parallel, and the drain electrode of field effect transistor Q01 meets direct voltage VCC, and grid connects the negative pole of diode D02, and source electrode is connected with the input of comparing unit as the output of detecting unit.
3. the low-power consumption leadage circuit of AC power according to claim 2, it is characterized in that: described comparing unit comprises resistance R03 and resistance R04, ground connection after one end series resistance R04 of resistance R03, the other end is connected with the source electrode of field effect transistor Q01 as the input of comparing unit; Resistance R03 is connected with the input control end of performance element as the output of comparing unit with the node of resistance R04.
4. the low-power consumption leadage circuit of AC power according to claim 3, it is characterized in that: described performance element comprises field effect transistor Q02 and resistance R05, ground connection after the source series resistance R05 of described field effect transistor Q02, grid is connected with the node between resistance R03 and resistance R04 as the input control end of performance element, and the electric discharge input drained as performance element is connected with the electrochemical capacitor of AC power.
5. the low-power consumption leadage circuit of AC power according to claim 2, is characterized in that: described field effect transistor Q01 is N channel field-effect pipe.
6. the low-power consumption leadage circuit of AC power according to claim 4, is characterized in that: described field effect transistor Q02 is P-channel field-effect transistor (PEFT) pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420611358.3U CN204441876U (en) | 2014-10-20 | 2014-10-20 | A kind of low-power consumption leadage circuit of AC power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420611358.3U CN204441876U (en) | 2014-10-20 | 2014-10-20 | A kind of low-power consumption leadage circuit of AC power |
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| CN204441876U true CN204441876U (en) | 2015-07-01 |
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| CN201420611358.3U Expired - Fee Related CN204441876U (en) | 2014-10-20 | 2014-10-20 | A kind of low-power consumption leadage circuit of AC power |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105959600A (en) * | 2016-06-29 | 2016-09-21 | 重庆惠科金扬科技有限公司 | Circuit capable of quickly turning off TV indicator lamp after power off, and television |
| CN106787654A (en) * | 2016-12-26 | 2017-05-31 | 厦门著赫电子科技有限公司 | The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump |
| CN111983292A (en) * | 2020-07-17 | 2020-11-24 | 苏州浪潮智能科技有限公司 | PSU voltage detection system based on server test |
-
2014
- 2014-10-20 CN CN201420611358.3U patent/CN204441876U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105959600A (en) * | 2016-06-29 | 2016-09-21 | 重庆惠科金扬科技有限公司 | Circuit capable of quickly turning off TV indicator lamp after power off, and television |
| CN105959600B (en) * | 2016-06-29 | 2023-04-07 | 重庆惠科金扬科技有限公司 | Circuit for quickly turning off TV indicator lamp after power failure and television |
| CN106787654A (en) * | 2016-12-26 | 2017-05-31 | 厦门著赫电子科技有限公司 | The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump |
| CN106787654B (en) * | 2016-12-26 | 2023-06-20 | 厦门著赫电子科技有限公司 | Circuit structure for switching power supply to rapidly shut off output voltage after alternating current power failure |
| CN111983292A (en) * | 2020-07-17 | 2020-11-24 | 苏州浪潮智能科技有限公司 | PSU voltage detection system based on server test |
| CN111983292B (en) * | 2020-07-17 | 2022-12-16 | 苏州浪潮智能科技有限公司 | PSU voltage detection system based on server test |
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| CF01 | Termination of patent right due to non-payment of annual fee |