CN205622303U - Utilize super capacitor to realize that current transformer of uninterrupted power supply gets electric power supply circuit - Google Patents
Utilize super capacitor to realize that current transformer of uninterrupted power supply gets electric power supply circuit Download PDFInfo
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- CN205622303U CN205622303U CN201620453830.4U CN201620453830U CN205622303U CN 205622303 U CN205622303 U CN 205622303U CN 201620453830 U CN201620453830 U CN 201620453830U CN 205622303 U CN205622303 U CN 205622303U
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Abstract
The utility model discloses an utilize super capacitor to realize that current transformer of uninterrupted power supply gets electric power supply circuit, including current transformer, rectifier circuit, reverse discharging protective diode D1, forward discharge diode D2, direct current voltage conversion circuit, two direction switch and super capacitor, rectifier circuit's output has still met the bypass switch, forward discharge diode D2's negative pole has still met overvoltage protection sampling circuit, charging voltage sampling circuit and reference voltage circuit, and overvoltage protection sampling circuit's output termination has excessive pressure control and drive circuit, and charging voltage sampling circuit's output termination has sampling circuit 0 and drive circuit, and sampling circuit 2 is connected with drive circuit's output with excessive pressure control, and sampling circuit 4 and sampling circuit 0 are connected with drive circuit's output. The utility model discloses circuit structure is simple, reasonable in design, and improving energy efficiency greatly, the practicality is strong, excellent in use effect, convenient to popularize and use.
Description
Technical field
This utility model belongs to power technique fields, is specifically related to a kind of electricity utilizing super capacitor to realize uninterrupted power supply
Current transformer power taking power circuit.
Background technology
At present country proposes high requirement to the quality of power supply of electrical network conveying electric energy, it is desirable to operation of power networks has higher reliable
Property and safety, can detect in time when circuit breaks down, and fault message sent to monitoring center, notify electric power overhaul
Personnel get rid of line fault in time, recover operation power.Electric network fault detects the device necessary facility as electric power netting safe running,
Application is all had in each grid company.And the normal job demand of failure detector has reliable and stable DC source, it is currently used in
The DC source that electric network fault detection device is powered has following several middle mode: (1) coordinates confession by solar panel and accumulator
Electricity, the when of daylight abundance, solar panel works, and is charged a battery energy storage by charging circuit, and cell panel is not
In the case of work, accumulator is powered to device by discharge circuit；(2) electrical network overhead transmission line is used for the frame communicating and taking shelter from the thunder
Empty Ground wire with insulation ocver, can produce induced potential in high-intensity magnetic field, by certain technology, form closed-loop path, have sensing in circuit
Electric current produces, and is charged a battery energy storage by charging circuit, and after power-off, battery discharging realizes uninterrupted power supply；(3) same
Time there is the area of wind energy and luminous energy, wind light mutual complementing can be used to power；Wind-photovoltaic complementary power supply system has wind-driven generator and the sun
Two kinds of generating equipments of array can jointly generate electricity, by controller control, the electric energy sent is stored in accumulator, works as dress
When putting needs electricity, battery discharging, it is achieved uninterrupted power supply；(4) by PT (voltage transformer) power taking, it is ensured that electricity system is just
Often batteries to store energy in the case of work, after power-off, control circuit automatically switches between accumulator realizes not as DC source
Cut-off electricity；(5) by CT (current transformer) power taking from a circuit, batteries to store energy, circuit automatic switchover mould after power-off
Formula, battery discharging, it is achieved the uninterrupted power supply of device.
Mode (1) uses solar panel and accumulator, without meeting long work in the case of external power supply
Make, environmental protection and energy saving, but the size that solar panel and accumulator make line fault testing device is greatly increased, and the sun
Can cell panel conversion efficiency be affected relatively greatly by factors such as weather, weather, geography, and accumulator itself to there is service life short, fill
Discharge current is little, needs to add to overcharge and cross problems such as putting cut-off protection circuit, charge-discharge performance temperature influence；Mode (2) takes
Electricity scheme is suitable for 110KV and above HVAC power transmission line, and earthing mode uses graded insulation, the operation side of one point earth
Formula, has significant application value for newly-built circuit and old technological transformation circuit；Mode (3) requires to use region to have the abundant sun
Energy and wind energy resources, have the biggest application potential on the ground such as Qinghai, Tibet；Mode (4) uses PT power taking, and voltage transformer volume is relatively
Greatly, PT way to take power is difficult in the space of small volume, and the PT of outdoor installation is easily subject to the damage of external force, fortune
The safety of row is affected.And accumulator charge and discharge electric current is less, need to add charging and discharging currents control circuit.PT coordinates
It is relatively big to there is power supply overall volume in the power supply mode of accumulator, and service lifetime of accumulator is shorter, needs after there is the certain time limit of use
Will the problem such as replacing again；Mode (5) uses CT power taking, and accumulator is little due to self-characteristic charge and discharge electric current, needs to add to fill, put
Electricity current control circuit avoids damaging accumulator because electric current is excessive, and battery-operated voltage is narrower, it is necessary to add electric power storage
Pond charging and discharging voltage protection circuit guarantees that battery-operated is within allowed band.CT coordinates the power supply mode of accumulator to deposit
Complex in protection circuit, device volume is bigger installs the shortcomings such as inconvenience.
In sum, the power supply mode of mode (1)～(5) all has certain limitation, it is impossible to meet actual making well
Use demand.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, it is provided that a kind of utilization
Super capacitor realizes the current transformer power taking power circuit of uninterrupted power supply, and its circuit structure is simple, reasonable in design, it is possible to big
Improving greatly energy utilization rate, practical, using effect is good, it is simple to promote the use of.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is: one utilizes super capacitor to realize not
The current transformer power taking power circuit of interruptedly supplying power, it is characterised in that: include that the electric current for power taking on power network line is mutual
Sensor and the rectification circuit being connected with the outfan of current transformer, and back discharge protection diode D1, forward electric discharge two
Pole pipe D2, DC voltage converting circuit, two-way switch and super capacitor；The outfan of described rectification circuit is further connected with bypass and opens
Closing, the anode of described back discharge protection diode D1 is connected with outfan and the by-pass switch of rectification circuit, and described forward is put
The anode of electric diode D2 and two-way switch all protect the negative electrode of diode D1 to be connected with back discharge, and described super capacitor is with double
Connect to switch；The input of described DC voltage converting circuit is connected with the negative electrode of forward discharge diode D2, described forward
The negative electrode of discharge diode D2 is further connected with overvoltage protection sample circuit, charging voltage sample circuit and reference voltage circuit, described
The outfan of DC voltage converting circuit is the current transformer power taking power circuit utilizing super capacitor to realize uninterrupted power supply
Cathode output end Vo+, the negative pole of described super capacitor is that the current transformer utilizing super capacitor to realize uninterrupted power supply takes
The cathode output end Vo-of electricity power circuit, the outfan of described overvoltage protection sample circuit is connected to overvoltage controlling and driving circuits,
The outfan of described charging voltage sample circuit is connected to charge and discharge control and drive circuit, described overvoltage controlling and driving circuits and
Charge and discharge control is all connected with the outfan of reference voltage circuit with drive circuit, and described by-pass switch and overvoltage control and drive
The outfan of circuit connects, and described two-way switch is connected with the outfan of drive circuit with charge and discharge control.
The above-mentioned current transformer power taking power circuit utilizing super capacitor to realize uninterrupted power supply, it is characterised in that:
Described rectification circuit is the full bridge rectifier being made up of diode D3, diode D4, diode D5 and diode D6, described two
The negative electrode of pole pipe D3 is connected and is the first AC signal input AC1 of rectification circuit, described two poles with the anode of diode D4
The negative electrode of pipe D6 is connected and is the second AC signal input AC2 of rectification circuit, described diode with the anode of diode D5
The negative electrode of D4 is connected and is the positive DC voltage output end V+ of rectification circuit with the negative electrode of diode D5, described diode D3's
Anode is connected and is the negative DC voltage output end V-of rectification circuit with the anode of diode D6；The first of described rectification circuit
AC signal input AC1 is connected with one end of the secondary side of current transformer, and the second AC signal of described rectification circuit is defeated
Enter to hold AC2 to be connected with the other end of the secondary side of current transformer.
The above-mentioned current transformer power taking power circuit utilizing super capacitor to realize uninterrupted power supply, it is characterised in that:
Described DC voltage converting circuit includes voltage conversion chip U4 and polar capacitor C1, the input of described voltage conversion chip U4
Pin VIN is the input of DC voltage converting circuit and is connected with the positive pole of polar capacitor C1, described voltage conversion chip U4
Outfan pin OUT be the outfan of DC voltage converting circuit, the earth terminal pin GND of described voltage conversion chip U4 and
The equal ground connection of negative pole of polar capacitor C1.
The above-mentioned current transformer power taking power circuit utilizing super capacitor to realize uninterrupted power supply, it is characterised in that:
Described reference voltage circuit includes three-terminal voltage-stabilizing chip TL431, nonpolar electric capacity C3 and resistance R17, described three-terminal voltage-stabilizing chip
The positive terminal of TL431 and the equal ground connection in one end of nonpolar electric capacity C3, one end of described resistance R17 and forward discharge diode
The negative electrode of D2 connects, and the Voltage Reference end of described three-terminal voltage-stabilizing chip TL431 and negative terminals are all with nonpolar electric capacity C3's
The other end of the other end and resistance R17 connect and on the basis of the outfan of potential circuit.
The above-mentioned current transformer power taking power circuit utilizing super capacitor to realize uninterrupted power supply, it is characterised in that:
Described charging voltage sample circuit include series connection resistance R2 and resistance R3, described resistance R2 and resistance R3 series connection after one end with
The negative electrode of forward discharge diode D2 connects, the other end ground connection after described resistance R2 and resistance R3 series connection, described resistance R2 and
Resistance R3 connects the outfan that end is charging voltage sample circuit.
The above-mentioned current transformer power taking power circuit utilizing super capacitor to realize uninterrupted power supply, it is characterised in that:
Described charge and discharge control and drive circuit include comparator U2 and audion VT1, and described two-way switch is enhancement mode PMOS Q1；
The in-phase input end of described comparator U2 is connected with the outfan of charging voltage sample circuit by resistance R14, described comparator
The inverting input of U2 is connected with the outfan of reference voltage circuit by resistance R13, and the base stage of described audion VT1 is with described
The outfan of comparator U2 connects, and is connected by the in-phase input end of resistance R15 and described comparator U2, described audion
The grounded emitter of VT1, the colelctor electrode of described audion VT1 is connected to resistance R7 and resistance R6, described enhancement mode PMOS of series connection
The grid of pipe Q1 connects with the connection end of resistance R7 and resistance R6, the source electrode of described enhancement mode PMOS Q1 and one end of resistance R6
Connecting with the negative electrode of back discharge protection diode D1, the drain electrode of described enhancement mode PMOS Q1 connects with the positive pole of super capacitor
Connect.
The above-mentioned current transformer power taking power circuit utilizing super capacitor to realize uninterrupted power supply, it is characterised in that:
Described overvoltage protection sample circuit include series connection resistance R4 and resistance R5, described resistance R4 and resistance R5 series connection after one end with
The negative electrode of forward discharge diode D2 connects, the other end ground connection after described resistance R4 and resistance R5 series connection, described resistance R4 and
Resistance R5 connects the outfan that end is overvoltage protection sample circuit.
The above-mentioned current transformer power taking power circuit utilizing super capacitor to realize uninterrupted power supply, it is characterised in that:
Described overvoltage controlling and driving circuits includes that comparator U1, described by-pass switch are enhancement mode NMOS tube Q2；Described comparator U1
In-phase input end be connected with the outfan of overvoltage protection sample circuit by resistance R10, the anti-phase input of described comparator U1
End is connected with the outfan of reference voltage circuit by resistance R9, the grid of described enhancement mode NMOS tube Q2 and described comparator U1
Outfan connect, and be connected by the in-phase input end of resistance R11 and described comparator U1, described enhancement mode NMOS tube Q2
Drain electrode is connected with the outfan of rectification circuit and the anode of back discharge protection diode D1, the source of described enhancement mode NMOS tube Q2
Pole ground connection.
This utility model compared with prior art has the advantage that
1, circuit structure of the present utility model is simple, reasonable in design, it is achieved convenient.
2, this utility model uses current transformer power taking from a circuit, and is aided with super capacitor energy-storage realization power supply
Uninterruptedly, this mode is compared with traditional approach, takes into account size and the service life of failure detector, is that traditional method cannot
Analogy, due to current transformer relatively voltage transformer low price, and can be conveniently mounted to panel switches box house or
Make opening form directly to hang on distribution line, thus for overhead transmission line electric power monitoring with instruction equipment, Current Mutual Inductance
Device power taking method is the power supply mode of a kind of great application prospect.
As long as 3, circuit of this utility model uninterrupted power source has certain electric current, can be supplied by current transformer power taking
Can, power supply has versatility.
4, after electrical network causes the tripping operation of circuit electric brake because of fault, standby super capacitor discharges, and DC voltage converting circuit continues
It is provided out stable operating voltage, it is achieved power supply is uninterrupted.Charging controls the voltage by pre-mu balanced circuit and reference voltage ratio
Relatively realize, after reaching charging voltage value, trigger two-way switch control circuit immediately, make two-way switch turn on, fill to super capacitor
Electricity energy storage.When the charging voltage of super capacitor soon reaches setting voltage, sampling network branch pressure voltage compares with reference voltage,
Overvoltage protection control circuits output high level, makes by-pass switch turn on, protects super capacitor.The action of protection switch is by pure mould
Plan method realizes, and the complexity of circuit substantially reduces.
5, connect cleverly in the front end of DC voltage converting circuit a diode, two-way switch conducting can be prevented super
During level electric capacity charging, it is abnormal that DC voltage converting circuit input voltage falls supplying power for outside.Circuit charges back at super capacitor
Concatenating a diode in road, prevent when by-pass switch turns on, super capacitor is discharged by by-pass switch.
6, power-supply system based on current transformer power taking super capacitor energy-storage has low cost, low in energy consumption, isolation performance
Good, the advantage of environmental protection, has great promotion and application in line-failure indicator or distribution power automation terminal and is worth.
7, of the present utility model practical, using effect is good, it is simple to promote the use of.
In sum, circuit structure of the present utility model is simple, reasonable in design, it is possible to be greatly improved energy utilization rate, real
Strong by property, using effect is good, it is simple to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Description of reference numerals:
1 rectification circuit；2 by-pass switches；3 DC voltage converting circuits；
4 two-way switch；5 super capacitors；6 charge and discharge control and drive circuit；
7 reference voltage circuits；8 overvoltage controlling and driving circuits；9 overvoltage protection sample circuits；
10 charging voltage sample circuits；11 current transformers.
Detailed description of the invention
A kind of current transformer power taking power supply electricity utilizing super capacitor to realize uninterrupted power supply as depicted in figs. 1 and 2
Road, including the current transformer 11 for power taking on power network line and the rectified current that is connected with the outfan of current transformer 11
Road 1, and back discharge protection diode D1, forward discharge diode D2, DC voltage converting circuit 3, two-way switch 4 and super
Level electric capacity 5；The outfan of described rectification circuit 1 is further connected with by-pass switch 2, the anode of described back discharge protection diode D1 with
Outfan and the by-pass switch 2 of rectification circuit 1 connect, and the anode of described forward discharge diode D2 and two-way switch 4 are all with anti-
Connecting to the negative electrode of discharge prevention diode D1, described super capacitor 5 is connected with two-way switch 4；Described DC voltage conversion electricity
The input on road 3 is connected with the negative electrode of forward discharge diode D2, and the negative electrode of described forward discharge diode D2 is further connected with overvoltage
Protection sample circuit 9, charging voltage sample circuit 10 and reference voltage circuit 7, the outfan of described DC voltage converting circuit 3
For utilizing super capacitor to realize the cathode output end Vo+ of current transformer power taking power circuit of uninterrupted power supply, described super
The negative pole of electric capacity 5 is the cathode output end utilizing current transformer power taking power circuit that super capacitor realizes uninterrupted power supply
Vo-, the outfan of described overvoltage protection sample circuit 9 is connected to overvoltage controlling and driving circuits 8, described charging voltage sample circuit
The outfan of 10 is connected to charge and discharge control and drive circuit 6, described overvoltage controlling and driving circuits 8 and charge and discharge control and driving
Circuit 6 all outfans with reference voltage circuit 7 are connected, the outfan of described by-pass switch 2 and overvoltage controlling and driving circuits 8
Connecting, described two-way switch 4 is connected with the outfan of charge and discharge control with drive circuit 6.
As in figure 2 it is shown, in the present embodiment, described rectification circuit 1 is by diode D3, diode D4, diode D5 and two
The full bridge rectifier of pole pipe D6 composition, the negative electrode of described diode D3 is connected with the anode of diode D4 and is rectification circuit 1
The first AC signal input AC1, the negative electrode of described diode D6 is connected with the anode of diode D5 and for rectification circuit 1
Second AC signal input AC2, the negative electrode of described diode D4 be connected with the negative electrode of diode D5 and for rectification circuit 1 just
Pole DC voltage output end V+, the anode of described diode D3 is connected and is the negative pole of rectification circuit 1 with the anode of diode D6
DC voltage output end V-；First AC signal input AC1 of described rectification circuit 1 and the secondary side of current transformer 11
One end connects, and the second AC signal input AC2 of described rectification circuit 1 connects with the other end of the secondary side of current transformer 11
Connect.
As in figure 2 it is shown, in the present embodiment, described DC voltage converting circuit 3 includes voltage conversion chip U4 and polarity electricity
Hold C1, the input that input pin VIN is DC voltage converting circuit 3 of described voltage conversion chip U4 and and polar capacitor
The positive pole of C1 connects, the outfan that outfan pin OUT is DC voltage converting circuit 3 of described voltage conversion chip U4, institute
State the equal ground connection of negative pole of the earth terminal pin GND and polar capacitor C1 of voltage conversion chip U4.
As in figure 2 it is shown, in the present embodiment, described reference voltage circuit 7 includes three-terminal voltage-stabilizing chip TL431, nonpolar electricity
Hold C3 and resistance R17, the positive terminal of described three-terminal voltage-stabilizing chip TL431 and the equal ground connection in one end of nonpolar electric capacity C3, institute
The negative electrode of one end and forward discharge diode D2 of stating resistance R17 is connected, the Voltage Reference end of described three-terminal voltage-stabilizing chip TL431
With negative terminals all with the other end of nonpolar electric capacity C3 and the other end of resistance R17 is connected and on the basis of potential circuit 7
Outfan.
As in figure 2 it is shown, in the present embodiment, described charging voltage sample circuit 10 includes the resistance R2 and resistance R3 of series connection,
One end after described resistance R2 and resistance R3 series connection is connected with the negative electrode of forward discharge diode D2, described resistance R2 and resistance R3
Other end ground connection after series connection, described resistance R2 and resistance R3 connects the outfan that end is charging voltage sample circuit 10.
As in figure 2 it is shown, in the present embodiment, described charge and discharge control and drive circuit 6 include comparator U2 and audion
VT1, described two-way switch 4 is enhancement mode PMOS Q1；The in-phase input end of described comparator U2 passes through resistance R14 and charged electrical
The outfan of pressure sample circuit 10 connects, and the inverting input of described comparator U2 is by resistance R13 and reference voltage circuit 7
Outfan connects, and the base stage of described audion VT1 is connected with the outfan of described comparator U2, and by resistance R15 with described
The in-phase input end of comparator U2 connects, and the grounded emitter of described audion VT1, the colelctor electrode of described audion VT1 is connected to
The resistance R7 and resistance R6 of series connection, the grid of described enhancement mode PMOS Q1 connects with the connection end of resistance R7 and resistance R6, institute
Stating the source electrode of enhancement mode PMOS Q1 protects the negative electrode of diode D1 to be connected with one end of resistance R6 and back discharge, described enhancing
The drain electrode of type PMOS Q1 is connected with the positive pole of super capacitor 5.When being embodied as, the power end of described comparator U2 is put with forward
The negative electrode of electric diode D2 connects, the earth terminal ground connection of described comparator U2, and the base stage of described audion VT1 passes through resistance R16
It is connected with the negative electrode of forward discharge diode D2.
As in figure 2 it is shown, in the present embodiment, described overvoltage protection sample circuit 9 includes resistance R4 and resistance R5, the institute of series connection
State the one end after resistance R4 and resistance R5 series connection to be connected with the negative electrode of forward discharge diode D2, described resistance R4 and resistance R5 string
Other end ground connection after connection, described resistance R4 and resistance R5 connects the outfan that end is overvoltage protection sample circuit 9.
As in figure 2 it is shown, in the present embodiment, described overvoltage controlling and driving circuits 8 includes comparator U1, described by-pass switch
2 is enhancement mode NMOS tube Q2；The in-phase input end of described comparator U1 is defeated by resistance R10 and overvoltage protection sample circuit 9
Going out end to connect, the inverting input of described comparator U1 is connected with the outfan of reference voltage circuit 7 by resistance R9, described increasing
The grid of strong type NMOS tube Q2 is connected with the outfan of described comparator U1, and passes through the same of resistance R11 and described comparator U1
Phase input connects, the drain electrode of described enhancement mode NMOS tube Q2 and the outfan of rectification circuit 1 and back discharge protection diode
The anode of D1 connects, the source ground of described enhancement mode NMOS tube Q2.When being embodied as, the power end of described comparator U1 with just
Connecting to the negative electrode of discharge diode D2, the earth terminal ground connection of described comparator U1, the grid of described enhancement mode NMOS tube Q2 leads to
The negative electrode crossing resistance R12 and forward discharge diode D2 is connected, and by resistance R1 ground connection.
Detailed process when using this utility model to power is:
The primary side of current transformer 11 is received on power network line, and by electrical equipment and DC voltage converting circuit 3
Outfan connect；
When current transformer 11 primary side has electric current to flow through, it is coupled to the alternating current circulation of current transformer 11 secondary side
Over commutation circuit 1 is transformed to DC current, and this DC current first passes around back discharge protection diode D1 and forward electric discharge two
Electric capacity C1 in DC voltage converting circuit 3 is charged by pole pipe D2, voltage in electric capacity C1 is charged to DC voltage converting circuit 3
During running voltage required for conversion chip U4, carry out voltage conversion and voltage stabilizing through DC voltage converting circuit 3, set for electricity consumption
Standby offer galvanic current pressure Vo；Meanwhile, the voltage after forward discharge diode D2 is entered by overvoltage protection sample circuit 9
Row sampling voltage sampling obtained export to overvoltage controlling and driving circuits 8, and charging voltage sample circuit 10 is to through just
The voltage that voltage after discharge diode D2 carries out sampling and sampling obtained exports to charge and discharge control and drive circuit 6,
Reference voltage circuit 7 is by voltage on the basis of the voltage transformation after forward discharge diode D2, it is provided that controls to overvoltage and drives
Galvanic electricity road 8 and charge and discharge control and drive circuit 6；Charging voltage sample circuit 10 is sampled by charge and discharge control with drive circuit 6
The voltage and the reference voltage that obtain compare, and the voltage obtained when charging voltage sample circuit 10 sampling is higher than reference voltage
Time, the voltage that now charging voltage sample circuit 10 sampling obtains has reached charging setting voltage, charge and discharge control and driving electricity
Road 6 controls two-way switch 4 and turns on, and the voltage of rectification circuit 1 output gives super capacitor 5 after back discharge protection diode D1
Charging energy-storing；Voltage and reference voltage that overvoltage protection sample circuit 9 sampling is obtained by overvoltage controlling and driving circuits 8 compare
Relatively, when the voltage that overvoltage protection sample circuit 9 sampling obtains is higher than reference voltage, now super capacitor 5 charging energy-storing reaches
Energy storage limit setting voltage, the voltage that overvoltage protection sample circuit 9 sampling obtains has reached overvoltage protection setting voltage, overvoltage
Controlling and driving circuits 8 controls by-pass switch 2 and turns on, and the DC current of rectification circuit 1 output forms circulation through by-pass switch 2
Loop；
When power network line breaks down and after error protection circuit breaker trip in power network line, current transformer 11 is once
Side current vanishes, super capacitor 5 as back-up source, the voltage of output after two-way switch 4 and forward discharge diode D2,
Carry out voltage conversion and voltage stabilizing through DC voltage converting circuit 3, continue as electrical equipment and galvanic current pressure Vo is provided.
In this utility model, by arranging overvoltage protection sample circuit 9, overvoltage controlling and driving circuits 8 and by-pass switch
2, it is possible to prevent from damaging super capacitor 5 because super capacitor 5 charging voltage is too high.
The above, be only preferred embodiment of the present utility model, not impose any restrictions this utility model, every
Any simple modification, change and equivalent structure change above example made according to this utility model technical spirit, the most still
Belong in the protection domain of technical solutions of the utility model.
Claims (8)
1. the current transformer power taking power circuit that a kind utilizes super capacitor to realize uninterrupted power supply, it is characterised in that: include
For the current transformer (11) of power taking on power network line and the rectification circuit that is connected with the outfan of current transformer (11)
(1), and back discharge protection diode D1, forward discharge diode D2, DC voltage converting circuit (3), two-way switch (4)
With super capacitor (5)；The outfan of described rectification circuit (1) is further connected with by-pass switch (2), described back discharge protection diode
The anode of D1 is connected with outfan and the by-pass switch (2) of rectification circuit (1), and the anode of described forward discharge diode D2 is with double
All protecting the negative electrode of diode D1 to be connected with back discharge to switch (4), described super capacitor (5) is connected with two-way switch (4)；
The input of described DC voltage converting circuit (3) is connected with the negative electrode of forward discharge diode D2, and described forward discharges two poles
The negative electrode of pipe D2 is further connected with overvoltage protection sample circuit (9), charging voltage sample circuit (10) and reference voltage circuit (7), institute
The outfan stating DC voltage converting circuit (3) is the current transformer power taking power supply utilizing super capacitor to realize uninterrupted power supply
The cathode output end Vo+ of circuit, the negative pole of described super capacitor (5) is that to utilize super capacitor to realize the electric current of uninterrupted power supply mutual
The cathode output end Vo-of sensor power taking power circuit, the outfan of described overvoltage protection sample circuit (9) be connected to overvoltage control with
Drive circuit (8), the outfan of described charging voltage sample circuit (10) is connected to charge and discharge control and drive circuit (6), described
Overvoltage controlling and driving circuits (8) and charge and discharge control and drive circuit (6) all with the outfan company of reference voltage circuit (7)
Connecing, described by-pass switch (2) is connected with the outfan of overvoltage controlling and driving circuits (8), described two-way switch (4) and discharge and recharge
The outfan of controlling and driving circuits (6) connects.
2. realize the current transformer power taking power circuit of uninterrupted power supply according to the super capacitor that utilizes described in claim 1,
It is characterized in that: described rectification circuit (1) is the full-bridge being made up of diode D3, diode D4, diode D5 and diode D6
Rectification circuit, the negative electrode of described diode D3 is connected and is the first AC signal of rectification circuit (1) with the anode of diode D4
Input AC1, the negative electrode of described diode D6 is connected and is the second AC signal of rectification circuit (1) with the anode of diode D5
Input AC2, the negative electrode of described diode D4 is connected and is the positive DC voltage of rectification circuit (1) with the negative electrode of diode D5
Outfan V+, the anode of described diode D3 is connected and is the negative DC voltage of rectification circuit (1) with the anode of diode D6
Outfan V-；First AC signal input AC1 of described rectification circuit (1) and one end of the secondary side of current transformer (11)
Connecting, the second AC signal input AC2 of described rectification circuit (1) connects with the other end of the secondary side of current transformer (11)
Connect.
3. realize the current transformer power taking power circuit of uninterrupted power supply according to the super capacitor that utilizes described in claim 1,
It is characterized in that: described DC voltage converting circuit (3) includes voltage conversion chip U4 and polar capacitor C1, described voltage is changed
The input that input pin VIN is DC voltage converting circuit (3) of chip U4 and being connected with the positive pole of polar capacitor C1, institute
State the outfan that outfan pin OUT is DC voltage converting circuit (3) of voltage conversion chip U4, described voltage conversion chip
The equal ground connection of negative pole of the earth terminal pin GND and polar capacitor C1 of U4.
4. realize the current transformer power taking power circuit of uninterrupted power supply according to the super capacitor that utilizes described in claim 1,
It is characterized in that: described reference voltage circuit (7) includes three-terminal voltage-stabilizing chip TL431, nonpolar electric capacity C3 and resistance R17, institute
State the positive terminal of three-terminal voltage-stabilizing chip TL431 and the equal ground connection in one end of nonpolar electric capacity C3, one end of described resistance R17 with
The negative electrode of forward discharge diode D2 connects, the Voltage Reference end of described three-terminal voltage-stabilizing chip TL431 and negative terminals all with
The other end of the other end of nonpolar electric capacity C3 and resistance R17 connect and on the basis of the outfan of potential circuit (7).
5. realize the current transformer power taking power circuit of uninterrupted power supply according to the super capacitor that utilizes described in claim 1,
It is characterized in that: described charging voltage sample circuit (10) includes resistance R2 and resistance R3, described resistance R2 and the resistance of series connection
One end after R3 series connection is connected with the negative electrode of forward discharge diode D2, another termination after described resistance R2 and resistance R3 series connection
Ground, the outfan that connection end is charging voltage sample circuit (10) of described resistance R2 and resistance R3.
6. realize the current transformer power taking power circuit of uninterrupted power supply according to the super capacitor that utilizes described in claim 1,
It is characterized in that: described charge and discharge control and drive circuit (6) include comparator U2 and audion VT1, described two-way switch (4)
For enhancement mode PMOS Q1；The in-phase input end of described comparator U2 is by resistance R14 and charging voltage sample circuit (10)
Outfan connects, and the inverting input of described comparator U2 is connected with the outfan of reference voltage circuit (7) by resistance R13,
The base stage of described audion VT1 is connected with the outfan of described comparator U2, and passes through the same of resistance R15 and described comparator U2
Phase input connects, the grounded emitter of described audion VT1, and the colelctor electrode of described audion VT1 is connected to the resistance R7 of series connection
With resistance R6, the grid of described enhancement mode PMOS Q1 connects with the connection end of resistance R7 and resistance R6, described enhancement mode PMOS
The source electrode of pipe Q1 is connected with one end of resistance R6 and the negative electrode of back discharge protection diode D1, described enhancement mode PMOS Q1
Drain electrode is connected with the positive pole of super capacitor (5).
7. realize the current transformer power taking power circuit of uninterrupted power supply according to the super capacitor that utilizes described in claim 1,
It is characterized in that: described overvoltage protection sample circuit (9) includes resistance R4 and the resistance R5, described resistance R4 and resistance R5 of series connection
One end after series connection is connected with the negative electrode of forward discharge diode D2, another termination after described resistance R4 and resistance R5 series connection
Ground, the outfan that connection end is overvoltage protection sample circuit (9) of described resistance R4 and resistance R5.
8. realize the current transformer power taking power circuit of uninterrupted power supply according to the super capacitor that utilizes described in claim 1,
It is characterized in that: described overvoltage controlling and driving circuits (8) includes that comparator U1, described by-pass switch (2) are enhancement mode NMOS
Pipe Q2；The in-phase input end of described comparator U1 is connected with the outfan of overvoltage protection sample circuit (9) by resistance R10, institute
The inverting input stating comparator U1 is connected with the outfan of reference voltage circuit (7) by resistance R9, described enhancement mode NMOS
The grid of pipe Q2 is connected with the outfan of described comparator U1, and by the in-phase input end of resistance R11 and described comparator U1
Connect, the drain electrode of described enhancement mode NMOS tube Q2 and the outfan of rectification circuit (1) and the sun of back discharge protection diode D1
Pole connects, the source ground of described enhancement mode NMOS tube Q2.
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| CN201620453830.4U CN205622303U (en) | 2016-05-18 | 2016-05-18 | Utilize super capacitor to realize that current transformer of uninterrupted power supply gets electric power supply circuit |
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| CN201620453830.4U CN205622303U (en) | 2016-05-18 | 2016-05-18 | Utilize super capacitor to realize that current transformer of uninterrupted power supply gets electric power supply circuit |
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| CN105914868A (en) * | 2016-05-18 | 2016-08-31 | 西安科技大学 | Supercapacitor energy storage uninterruptible power supply based on current transformer, and power supply method thereof |
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| CN110380608A (en) * | 2019-08-15 | 2019-10-25 | 荣信汇科电气技术有限责任公司 | It is a kind of taking for application is connected with power module equalizing resistance can circuit |
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