CN106532879B - A kind of AC current transformer takes can circuit - Google Patents
A kind of AC current transformer takes can circuit Download PDFInfo
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- CN106532879B CN106532879B CN201610977274.5A CN201610977274A CN106532879B CN 106532879 B CN106532879 B CN 106532879B CN 201610977274 A CN201610977274 A CN 201610977274A CN 106532879 B CN106532879 B CN 106532879B
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- 239000003990 capacitor Substances 0.000 claims abstract description 53
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- 239000003381 stabilizer Substances 0.000 claims description 26
- 230000005611 electricity Effects 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
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- H02J7/025—
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- H02J5/005—
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Abstract
The present invention relates to a kind of AC current transformers to take energy circuit, including current transformer, rectifier and regulated power supply output circuit；The exchange side of the output end connection rectifier of the current transformer, regulated power supply output circuit is for connecting load；It further include high-voltage capacitor Cs and start-up circuit；When the voltage value at the both ends high-voltage capacitor Cs is less than setting value, current transformer is high-voltage capacitor Cs charging by rectifier, and start-up circuit will be connected between rectifier and regulated power supply output circuit and be disconnected；When the voltage value at the both ends high-voltage capacitor Cs reaches setting value, trigger starting circuit connects the DC side of regulated power supply output circuit and rectifier, and high-voltage capacitor Cs discharges.Technical solution provided by the invention can discharge high-power energy in high-voltage capacitor Cs electric discharge, to solve the problems, such as that current transformer cannot provide high-power energy the short time in a short time.
Description
Technical field
The present invention relates to high voltage power transmission technical fields, and in particular to a kind of AC current transformer takes can circuit.
Background technique
In high voltage power transmisson system, require to be powered when having the work of many detection devices.The big portion of these detection devices
Dividing all is weak current equipment, and the high-voltage electricity that cannot be directlyed adopt in high voltage power transmisson system supplies, and needs that power supply is separately provided.But individually
Power supply is set and not only needs certain cost, but also needs to access a large amount of electric wire in power supply, increases high voltage power transmisson system
Complexity.
Therefore, many high voltage power transmisson systems all use current transformer to take from the high-tension line of high voltage power transmisson system at present
Can, it powers for weak current equipment, has not only saved cost, but also ensure that the continuity of power supply.But many equipment, such as switch electricity
Source, needs high-power energy in short-term on startup, and the finite energy that current transformer is taken, and is not able to satisfy short time offer
The demand of high-power energy.
Summary of the invention
The present invention provide a kind of AC current transformer take can circuit, cannot the short time for solving above-mentioned current transformer
The problem of high-power energy is provided.
A kind of AC current transformer take can circuit, including current transformer, rectifier and regulated power supply output circuit；Institute
The exchange side of the output end connection rectifier of current transformer is stated, regulated power supply output circuit is for connecting load；It further include height
Piezoelectric capsule Cs and start-up circuit；
When the voltage value at the both ends high-voltage capacitor Cs is less than setting value, current transformer is high-voltage capacitance by rectifier
Device Cs charging, start-up circuit will be connected between rectifier and regulated power supply output circuit and disconnected；
When the voltage value at the both ends high-voltage capacitor Cs reaches setting value, regulated power supply is exported electricity by trigger starting circuit
The connection of the DC side of road and rectifier, high-voltage capacitor Cs discharge.
A kind of AC current transformer provided by the present invention takes energy circuit, when the voltage value at the both ends high-voltage capacitor Cs is small
When setting value, start-up circuit is not triggered, and will be isolated between rectifier and regulated power supply output circuit, at this time high-voltage capacitance
Device Cs charges；As high-voltage capacitance Cs charges, the voltage at both ends is gradually risen, when reaching setting value, triggering
The DC side of start-up circuit, regulated power supply output circuit and rectifier connects, and high-voltage capacitor Cs carries out the high-power of short time
Electric discharge, starting load, to solve the problems, such as that current transformer cannot provide high-power energy the short time.
Further, the DC side of rectifier is arranged in the high-voltage capacitor Cs, and the start-up circuit includes silicon-controlled
T, triode DK1 and voltage-stabiliser tube W1；Voltage higher one end when the anode connection high-voltage capacitor Cs electric discharge of the voltage-stabiliser tube W1,
Voltage lower one end when cathode is discharged by resistance R1 connection high-voltage capacitor Cs；The base stage of triode DK1 connects voltage-stabiliser tube
The anode of W1, voltage higher one end when collector is discharged by pull-up resistor R3 connection high-voltage capacitor Cs, emitter pass through
Voltage lower one end when pull down resistor R2 connection high-voltage capacitor Cs discharges；The gate pole connecting triode DK1 of the silicon-controlled T
Emitter, cathode connect high-voltage capacitor Cs electric discharge when the lower one end of voltage, anode connect regulated power supply output circuit.It adopts
With resistance, voltage-stabiliser tube, triode and Group of Silicon Controlled Rectifier at start-up circuit, it is not only at low cost but also real by the characteristic of component
It now triggers, reaction speed is fast.
Further, the regulated power supply output circuit includes voltage-stabiliser tube W2, triode DK2, positive output terminal and bears defeated
Terminal out；Voltage higher one end when the anode of the voltage-stabiliser tube W2 is discharged by resistance R4 connection high-voltage capacitor Cs, cathode
Connect start-up circuit and negative output terminal；The anode of the base stage connection voltage-stabiliser tube W2 of the triode DK2, collector pass through resistance
Voltage higher end when R5 connection high-voltage capacitor Cs discharges, emitter connect positive output terminal.Wherein voltage-stabiliser tube W2 is for steady
Determine the output voltage between positive output terminal and negative output terminal, resistance R5 is used for current limliting, prevents the electric current of output excessive.
Detailed description of the invention
Fig. 1 is the schematic diagram that AC current transformer takes energy circuit in embodiment.
Specific embodiment
The present invention provide a kind of AC current transformer take can circuit, cannot be provided the short time for solving current transformer
The problem of high-power energy.
A kind of AC current transformer provided by the present invention takes energy circuit, including current transformer, rectifier and pressure stabilizing
Power output circuit；The exchange side of the output end connection rectifier of the current transformer, regulated power supply output circuit is for connecting
Connect load；It further include high-voltage capacitor Cs and start-up circuit；
When the voltage value at the both ends high-voltage capacitor Cs is less than setting value, current transformer is high-voltage capacitance by rectifier
Device Cs charging, start-up circuit will be connected between rectifier and regulated power supply output circuit and disconnected；
When the voltage value at the both ends high-voltage capacitor Cs reaches setting value, regulated power supply is exported electricity by trigger starting circuit
The connection of the DC side of road and rectifier, high-voltage capacitor Cs discharge.
A kind of AC current transformer provided by the present invention takes energy circuit, when the voltage value at the both ends high-voltage capacitor Cs is small
When setting value, start-up circuit is not triggered, and will be isolated between rectifier and regulated power supply output circuit, at this time high-voltage capacitance
Device Cs charges；As high-voltage capacitor Cs charges, the voltage at both ends is gradually risen, when reaching setting value, touching
Start-up circuit, the DC side connection of regulated power supply output circuit and rectifier are sent out, high-voltage capacitor Cs carries out the big function of short time
Rate electric discharge, starting load, to solve the problems, such as that current transformer cannot provide high-power energy the short time.
The present invention is described in detail with reference to the accompanying drawing.
The present embodiment provides a kind of AC current transformers to take energy circuit, and schematic diagram is as shown in Figure 1, include Current Mutual Inductance
Device CT, rectification circuit, high-voltage capacitor Cs, start-up circuit and regulated power supply output circuit.Wherein Current Transmit is used and is worn
Cored structure is connected in alternating current circuit, and outlet side connects the exchange side of rectifier, rectifier be by diode D1, D2, D3 and
The rectifier that D4 uses bridge-type to be formed by connecting, DC side connect high-voltage capacitor Cs.
Start-up circuit includes thyristor T, triode DK1 and voltage-stabiliser tube W1；The anode connection high-voltage capacitor of voltage-stabiliser tube W1
Voltage higher one end when Cs discharges, voltage lower one end when cathode is discharged by resistance R1 connection high-voltage capacitor Cs；Three
The anode of the base stage connection voltage-stabiliser tube W1 of pole pipe DK1, electricity when collector is discharged by pull-up resistor R3 connection high-voltage capacitor Cs
Press higher one end, voltage lower one end when emitter is discharged by pull down resistor R2 connection high-voltage capacitor Cs；Thyristor T
Gate pole connecting triode DK1 emitter, cathode connect high-voltage capacitor Cs electric discharge when the lower one end of voltage, anode connection
Regulated power supply output circuit.
Regulated power supply output circuit includes voltage-stabiliser tube W2, triode DK2, positive output terminal+V and negative output terminal 0V；Its
Voltage higher one end when the anode of middle voltage-stabiliser tube W2 is discharged by resistance R4 connection high-voltage capacitor Cs, cathode connection starting electricity
Road and negative output terminal 0V；The anode of the base stage connection voltage-stabiliser tube W2 of triode DK2, collector pass through resistance R5 connection high-voltage electricity
Voltage higher end when container Cs discharges, emitter connect positive output terminal+V.Positive output terminal+V and negative output terminal 0V is used
It is loaded in connection.
When the voltage at the both ends high-voltage capacitor Cs is lower, the base voltage of triode DK1 under the action of voltage-stabiliser tube W1
Lower, thyristor T cannot be triggered, and be in off state, cannot be formed back between positive output terminal+V and negative output terminal 0V
The electric current on road, at this time Current Transmit output charges after rectifier to high-voltage capacitor Cs.With high-voltage capacitance
The electric energy of device Cs storage is more and more, and the voltage at both ends also can be higher and higher, when reaching the pressure stabilizing value of voltage-stabiliser tube W1, three poles
Pipe DK1 conducting, emitter voltage increase, and trigger thyristor T.Regulated power supply output circuit and rectifier after thyristor T conducting
DC side connection, is formed into a loop, high-voltage capacitor Cs discharges in a short time between positive output terminal+V and negative output terminal 0V
High-power energy is to load, load starting.Voltage-stabiliser tube W2 carries out pressure stabilizing control to positive output terminal+V and negative output terminal 0V at this time
System, resistance R5 play metering function, prevent the electric current for flowing through load excessive.
After load starting, as high-voltage capacitor Cs discharges, the voltage at both ends can be gradually decreased.Due to thyristor
T is in forward voltage control, so can maintain always to be connected, the electric current of Current Transmit secondary side passes through rectifier rectification,
Using being directly output to load after voltage-stabiliser tube W2 pressure stabilizing, the effect of high-voltage capacitor Cs at this time is filtering.
In the present embodiment, start-up circuit includes thyristor T, triode DK1 and voltage-stabiliser tube W1, as other embodiments,
Thyristor T and triode DK1 can use switching tube, or using the corresponding detection device detection both ends high-voltage capacitor Cs
Voltage, regulated power supply output circuit is controlled when voltage reaches setting value and the DC side of rectifier is attached.
In the present embodiment, regulated power supply output circuit includes voltage-stabiliser tube W2, triode DK2, positive output terminal and negative output
Terminal；As other embodiments, triode DK2 can be provided only with positive output for switching tube or regulated power supply output circuit
Terminal and negative output terminal.
Specific embodiment of the present invention is presented above, but the present invention is not limited to described embodiment.
Under the thinking that the present invention provides, to the skill in above-described embodiment by the way of being readily apparent that those skilled in the art
Art means are converted, are replaced, are modified, and play the role of with the present invention in relevant art means it is essentially identical, realize
Goal of the invention it is also essentially identical, the technical solution formed in this way is to be finely adjusted to be formed to above-described embodiment, this technology
Scheme is still fallen in protection scope of the present invention.
Claims (2)
1. a kind of AC current transformer takes energy circuit, including current transformer, rectifier and regulated power supply output circuit；It is described
The exchange side of the output end connection rectifier of current transformer, regulated power supply output circuit is for connecting load；It is characterized in that,
It further include high-voltage capacitor Cs and start-up circuit；
When the voltage value at the both ends high-voltage capacitor Cs is less than setting value, current transformer is high-voltage capacitor Cs by rectifier
Charging, start-up circuit will be connected between rectifier and regulated power supply output circuit and disconnected；
When the voltage value at the both ends high-voltage capacitor Cs reaches setting value, trigger starting circuit, by regulated power supply output circuit with
The DC side of rectifier connects, and high-voltage capacitor Cs discharges；
The high-voltage capacitor Cs is arranged in the DC side of rectifier, the start-up circuit include silicon-controlled T, triode DK1 and
Voltage-stabiliser tube W1；Voltage higher one end when the anode connection high-voltage capacitor Cs electric discharge of the voltage-stabiliser tube W1, cathode pass through resistance
Voltage lower one end when R1 connection high-voltage capacitor Cs discharges；The anode of the base stage connection voltage-stabiliser tube W1 of triode DK1, current collection
Voltage higher one end when pole is discharged by pull-up resistor R3 connection high-voltage capacitor Cs, emitter are connected by pull down resistor R2
Voltage lower one end when high-voltage capacitor Cs discharges；The emitter of the gate pole connecting triode DK1 of the silicon-controlled T, cathode
Voltage lower one end when connecting high-voltage capacitor Cs electric discharge, anode connect regulated power supply output circuit.
2. a kind of AC current transformer according to claim 1 takes energy circuit, which is characterized in that the regulated power supply is defeated
Circuit includes voltage-stabiliser tube W2, triode DK2, positive output terminal and negative output terminal out；The anode of the voltage-stabiliser tube W2 passes through electricity
Voltage higher one end when hindering R4 connection high-voltage capacitor Cs electric discharge, cathode connect start-up circuit and negative output terminal；Described three
Pole pipe DK2 base stage connection voltage-stabiliser tube W2 anode, collector by resistance R5 connection high-voltage capacitor Cs electric discharge when voltage compared with
High one end, emitter connect positive output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610977274.5A CN106532879B (en) | 2016-11-07 | 2016-11-07 | A kind of AC current transformer takes can circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610977274.5A CN106532879B (en) | 2016-11-07 | 2016-11-07 | A kind of AC current transformer takes can circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106532879A CN106532879A (en) | 2017-03-22 |
| CN106532879B true CN106532879B (en) | 2019-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610977274.5A Active CN106532879B (en) | 2016-11-07 | 2016-11-07 | A kind of AC current transformer takes can circuit |
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| CN (1) | CN106532879B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953371B (en) * | 2017-04-24 | 2020-02-21 | 许继集团有限公司 | Alternating current CT energy taking device and overvoltage preventing circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0746771A (en) * | 1993-07-30 | 1995-02-14 | Technical Asoshieeto:Kk | Automatic charger |
| CN201904731U (en) * | 2010-12-30 | 2011-07-20 | 宁波三星电气股份有限公司 | Power-supply circuit for power transformer |
| CN102377163B (en) * | 2011-09-16 | 2014-03-12 | 上海诺雅克电气有限公司 | Electronic tripping device with function of monitoring tripping power source |
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| CN106532879A (en) | 2017-03-22 |
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