CN109672255A - Standby capacitor charge and discharge circuit, charging/discharging thereof and its fault detector - Google Patents
Standby capacitor charge and discharge circuit, charging/discharging thereof and its fault detector Download PDFInfo
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- CN109672255A CN109672255A CN201910137864.0A CN201910137864A CN109672255A CN 109672255 A CN109672255 A CN 109672255A CN 201910137864 A CN201910137864 A CN 201910137864A CN 109672255 A CN109672255 A CN 109672255A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of standby capacitor charge and discharge circuits, including standby capacitor, charging circuit, charging control circuit, charging enabling circuitry, starting control circuit, discharge circuit, charge/discharge control circuit and electric discharge start-up circuit；Charge power supply signal connects standby capacitor by charging circuit；Charging control circuit controls standby capacitor charging；Charging enabling circuitry starts charging control circuit；Start control circuit to be worked according to the output voltage control charging enabling circuitry of standby capacitor；Standby capacitor is powered by discharge circuit；Charge/discharge control circuit controls discharge circuit work；The start-up circuit that discharges controls charge/discharge control circuit according to normal power supply signal and works.The invention also discloses the charging/discharging thereofs of the standby capacitor charge and discharge circuit, and include the fault detector of the standby capacitor charge and discharge circuit and its charging/discharging thereof.High reliablity, circuit safety and circuit of the present invention are swift in response.
Description
Technical field
Present invention relates particularly to a kind of standby capacitor charge and discharge circuit, charging/discharging thereof and its fault detectors.
Background technique
With the development and the improvement of people's living standards of economic technology, electronic equipment has been widely used for the life of people
In producing and living, endless convenience is brought to people's production and life.Meanwhile with widely available, the electricity of electronic equipment
The reliability requirement of sub- equipment is also higher and higher.
Power backup circuit is widely used in all types of electronic equipments, and it acts as the normal power supply terminations in electronic equipment
Or when occurring abnormal, it can quickly come into operation and provide power supply for electronic equipment, to improve the reliable of electronic equipment
Property.
In power backup circuit, most important component is energy storage component.Power supply of the energy storage component in electronic equipment
Energy storage state is in when normal work, for storing enough energy；And (for example fall the power supply of electronic equipment is abnormal
Electricity) when, it can quickly put into power circuit and discharge spare energy.Currently, widely used energy storage component is farad capacitor.
But at present using in the power backup circuit of farad capacitor, circuit is too simple, so that farad capacitor exists
Situations such as overcharging does not simply fail to detect the capacity of farad capacitor, and when system is powered down when farad capacitor investment circuit
Also controller is needed to operate, the reaction time is slower, and reliability is not high.
Summary of the invention
One of the objects of the present invention is to provide a kind of high reliablity, circuit safety and the willing standby capacitors of circuit
Charge-discharge circuit.
The second object of the present invention is to provide a kind of charging/discharging thereof of standby capacitor charge and discharge circuit.
The third object of the present invention is to provide a kind of fault detector, which includes the standby electricity
Hold charge-discharge circuit and its charging/discharging thereof.
This standby capacitor charge and discharge circuit provided by the invention, including standby capacitor further include charging circuit, charging control
Circuit, charging enabling circuitry, starting control circuit, discharge circuit, charge/discharge control circuit and electric discharge start-up circuit processed；Charge power supply
Signal connects standby capacitor by charging circuit；The control terminal of the output end connection charging circuit of charging control circuit, to control
The charging process of standby capacitor processed；The input terminal of the output end connection charging control circuit of charging enabling circuitry, fills for starting
Electric control circuit；The output end for starting the input terminal connection standby capacitor of control circuit, starts the output end connection of control circuit
The input terminal of charging enabling circuitry, starting control circuit are used for the output voltage control charging enabling circuitry work according to standby capacitor
Make；The output end connection discharge circuit of standby capacitor simultaneously externally provides backup power source；The output end connection of charge/discharge control circuit is put
The control terminal of circuit simultaneously controls discharge circuit work；The input terminal of electric discharge start-up circuit connects normal power supply signal, and electric discharge is opened
The input terminal of the output end connection charge/discharge control circuit of dynamic circuit, electric discharge start-up circuit are used to be put according to the control of normal power supply signal
Electric control circuit work.
The standby capacitor charge and discharge circuit further includes voltage detecting circuit；Voltage detecting circuit is connected to standby capacitor
Output end, for detecting the output voltage of standby capacitor, and will test signal and externally upload.
The voltage detecting circuit is the resistor voltage divider circuit being made of concatenated resistance.
The charging circuit includes the first PMOS tube of charging, the second PMOS tube of charging and charging current limiter resistance；Charging the
The drain electrode of one PMOS tube connects charge power supply signal, and the source electrode of the first PMOS tube of charging connects the source electrode of the second PMOS tube of charging,
One end of the drain electrode connection charging current limiter resistance for second PMOS tube that charges, the other end connection standby capacitor of charging current limiter resistance
Anode；The grid for including the second PMOS tube of grid and charging of the first PMOS tube of charging is shorted and connects as the control terminal of charging circuit
Connect the output end of charging control circuit.
The charging control circuit includes charge control pull-up resistor and charge control adjustable voltage stabilizer；Charge control can
One end of the cathode connection charge control pull-up resistor of voltage-stablizer is adjusted, while the cathode of charge control adjustable voltage stabilizer is also used as and fills
The control terminal of the output end connection charging circuit of electric control circuit；The other end connection charging first of charge control pull-up resistor
The source electrode of PMOS tube；The cathode of the anode connection standby capacitor of charge control adjustable voltage stabilizer；Charge control adjustable voltage stabilizer
Input terminal with reference to pole as charging control circuit, and connect the output end of charging enabling circuitry.
The charging enabling circuitry includes the first divider resistance of charge initiation, the second divider resistance of charge initiation, charging
Start third divider resistance, charge initiation filter capacitor and charge initiation adjustable voltage stabilizer；The first divider resistance of charge initiation fills
Electrically activate the second divider resistance and charge initiation third divider resistance be serially connected in charge power supply signal and standby capacitor cathode it
Between, for being divided to charge power supply signal；The cathode of charge initiation adjustable voltage stabilizer is connected to the partial pressure of charge initiation first
Between the second divider resistance of resistance and charge initiation, the cathode of the anode connection standby capacitor of charge initiation adjustable voltage stabilizer fills
Input terminal of the reference pole of adjustable voltage stabilizer as charging enabling circuitry is electrically activated, and connects the output end of starting control circuit；
Charge initiation filter capacitor is attempted by the both ends of charge initiation third divider resistance；The charging of charge initiation the second divider resistance volume is opened
Output end of the signal as charging enabling circuitry all the way is exported between dynamic third divider resistance, and connects the defeated of charging control circuit
Enter end.
The starting control circuit includes resistor voltage divider circuit and filter circuit；Resistor voltage divider circuit is attempted by standby electricity
The anode and cathode both ends of appearance, divide for the output voltage to standby capacitor；Signal after partial pressure passes through filter circuit
Output end after filtering as starting control circuit, and connect the input terminal of charging enabling circuitry.
The discharge circuit includes the second PMOS tube of the first PMOS tube of electric discharge and electric discharge；The anode connection of standby capacitor is put
The drain electrode of electric first PMOS tube, the drain electrode of source electrode connection the second PMOS tube of electric discharge of the first PMOS tube of electric discharge, discharge the 2nd PMOS
Output end of the source electrode of pipe as standby capacitor charge and discharge circuit, and supplying power for outside；The grid for first PMOS tube of discharging and electric discharge
The grid of second PMOS tube is shorted, and the output end as the control terminal of discharge circuit connection charge/discharge control circuit.
The charge/discharge control circuit includes control of discharge pull-up resistor and control of discharge adjustable voltage stabilizer；On control of discharge
The source electrode of one end connection the first PMOS tube of electric discharge of pull-up resistor, the other end connection control of discharge of control of discharge pull-up resistor is adjustable
The cathode of voltage-stablizer；The cathode of the anode connection standby capacitor of control of discharge adjustable voltage stabilizer；Control of discharge adjustable voltage stabilizer
Input terminal with reference to pole as charge/discharge control circuit, the output end of connection electric discharge start-up circuit.
The electric discharge start-up circuit includes the first divider resistance of electric discharge starting, the second divider resistance of electric discharge starting, electric discharge
Start switch pipe, electric discharge starts switch pipe current-limiting resistance and electric discharge starting standby capacitance current-limiting resistance；Normal power supply signal passes through
Electric discharge the first divider resistance of starting of concatenation connects the cathode of standby capacitor with electric discharge the second divider resistance of starting；Electric discharge starting the
The voltage division signal of normal power supply signal is exported between one divider resistance and electric discharge the second divider resistance of starting, and connects electric discharge starting
The control terminal of switching tube；Electric discharge starts switch the cathode of movable end one end connection standby capacitor of pipe, puts point driving switch pipe
The movable end other end connects the one end for putting point driving switch pipe current-limiting resistance；The anode connection electric discharge starting standby electricity of standby capacitor
One end of tolerance leakage resistance；The other end of electric discharge starting standby capacitance current-limiting resistance starts switch the another of pipe current-limiting resistance with electric discharge
One end connection and the output end as electric discharge start-up circuit, while connecting the input terminal of charge/discharge control circuit.
The present invention also provides a kind of charging/discharging thereofs of standby capacitor charge and discharge circuit, include the following steps:
S1. charge power supply signal gives standby capacitor charging by charging circuit；
S2. charging control circuit control charging circuit work, to control the charging current of standby capacitor；
S3. charging enabling circuitry control charging control circuit work, to control the voltage when starting of standby capacitor charging
It is horizontal；
S4. starting control circuit control charging enabling circuitry work, so that the output voltage level in standby capacitor reaches
Stop charging when setting value；
S5. standby capacitor passes through discharge circuit electric discharge and supplying power for outside；
S6. charge/discharge control circuit control discharge circuit work, so that controlling standby capacitor starts electric discharge and supplying power for outside
Time；
S7. electric discharge start-up circuit control charge/discharge control circuit work, to control control of discharge according to normal power supply signal
The working time of circuit.
The present invention also provides a kind of fault detector, which includes the standby capacitor charge and discharge electricity
Road and its charging/discharging thereof.
This standby capacitor charge and discharge circuit and charging/discharging thereof provided by the invention, are set by reliable and simple circuit
Meter itself has implemented the charging of standby capacitor only by hardware circuit, put in the case where not needing peripheral control unit participation
The control of electricity and its process, and can be realized standby capacitor and quickly can come into operation and supply in normal power supply Signal Fail
Electricity, therefore high reliablity of the present invention, circuit safety and circuit are swift in response.
Detailed description of the invention
Fig. 1 is the functional block diagram of standby capacitor charge and discharge circuit of the invention.
Fig. 2 is the circuit theory schematic diagram of standby capacitor charge and discharge circuit of the invention.
Fig. 3 is the method flow schematic diagram of the charging/discharging thereof of standby capacitor charge and discharge circuit of the invention.
Specific embodiment
As shown in Figure 1 be standby capacitor charge and discharge circuit of the invention functional block diagram: it is provided by the invention it is this after
Standby capacitor charge and discharge circuit, including standby capacitor further include charging circuit, charging control circuit, charging enabling circuitry, starting control
Circuit, discharge circuit, charge/discharge control circuit and electric discharge start-up circuit processed；Charge power supply signal connects standby electricity by charging circuit
Hold；The control terminal of the output end connection charging circuit of charging control circuit, to control the charging process of standby capacitor；Charging is opened
The input terminal of the output end connection charging control circuit of dynamic circuit, for starting charging control circuit；Start the defeated of control circuit
The output end for entering end connection standby capacitor starts the input terminal of the output end connection charging enabling circuitry of control circuit, starting control
Circuit processed is used to be worked according to the output voltage control charging enabling circuitry of standby capacitor；The output end of standby capacitor connects electric discharge
Circuit simultaneously externally provides backup power source；The control terminal of the output end connection discharge circuit of charge/discharge control circuit simultaneously controls discharge circuit
Work；The input terminal of electric discharge start-up circuit connects normal power supply signal, the output end connection control of discharge electricity for the start-up circuit that discharges
The input terminal on road, electric discharge start-up circuit are used to control charge/discharge control circuit work according to normal power supply signal.
In the specific implementation, voltage detecting circuit can also be increased；Voltage detecting circuit is connected to the output of standby capacitor
End, for detecting the output voltage of standby capacitor, and will test signal and externally uploads；For example the control of electronic equipment can be uploaded to
Device processed, so that controller will appreciate that the capacity status of standby capacitor.
It is illustrated in figure 2 the circuit theory schematic diagram of standby capacitor charge and discharge circuit of the invention:
Wherein, farad capacitor is capacitor C1 in figure；
Charging circuit includes charging the first PMOS tube (indicating V1 in figure), charging the second PMOS tube (indicating V2 in figure) and fills
Electric current-limiting resistance (R1 is indicated in figure)；The drain electrode for first PMOS tube that charges connects charge power supply signal, the first PMOS tube of charging
The source electrode of source electrode connection the second PMOS tube of charging, one end of the drain electrode connection charging current limiter resistance of the second PMOS tube of charging, charging
The anode of the other end connection standby capacitor of current-limiting resistance；Include the grid of the second PMOS tube of grid and charging of the first PMOS tube of charging
The extremely short output end connect and charging control circuit is connected as the control terminal of charging circuit.
Charging control circuit includes charge control pull-up resistor (R3 is indicated in figure) and charge control adjustable voltage stabilizer (in figure
Indicate V5, model TL431)；One end of the cathode connection charge control pull-up resistor of charge control adjustable voltage stabilizer, fills simultaneously
The cathode of electric control adjustable voltage stabilizer is also used as the control terminal of the output end connection charging circuit of charging control circuit；Charge control
The source electrode of other end connection the first PMOS tube of charging of pull-up resistor；The anode of charge control adjustable voltage stabilizer connects standby capacitor
Cathode；Input terminal of the reference pole of charge control adjustable voltage stabilizer as charging control circuit, and connect charging enabling circuitry
Output end.
Charging enabling circuitry includes the first divider resistance of charge initiation (R2 is indicated in figure), the second divider resistance of charge initiation
(R7 is indicated in figure), charge initiation third divider resistance (R14 is indicated in figure), charge initiation filter capacitor (C3 is indicated in figure) and
Charge initiation adjustable voltage stabilizer (indicates V8, model TL431) in figure；The first divider resistance of charge initiation, charge initiation second
Divider resistance and charge initiation third divider resistance are serially connected between charge power supply signal and the cathode of standby capacitor, for filling
Electric power supply signal is divided；The cathode of charge initiation adjustable voltage stabilizer is connected to the first divider resistance of charge initiation and charging is opened
Between dynamic second divider resistance, the cathode of the anode connection standby capacitor of charge initiation adjustable voltage stabilizer, it is steady that charge initiation is adjustable
Input terminal of the reference pole of depressor as charging enabling circuitry, and connect the output end of starting control circuit；Charge initiation filtering
Capacitor is attempted by the both ends of charge initiation third divider resistance；Charge initiation the second divider resistance volume charge initiation third partial pressure electricity
Output end of the signal as charging enabling circuitry all the way is exported between resistance, and connects the input terminal of charging control circuit.
Starting control circuit includes resistor voltage divider circuit (including resistance R4, R8 and R12 in figure) and filter circuit (figure acceptance of the bid
Show C4)；Resistor voltage divider circuit is attempted by the anode and cathode both ends of standby capacitor, carries out for the output voltage to standby capacitor
Partial pressure；Signal (terminal voltage signal of resistance R12) after partial pressure filtered by filter circuit after as starting the defeated of control circuit
Outlet, and connect the input terminal of charging enabling circuitry.
Discharge circuit includes electric discharge the first PMOS tube (V3 is indicated in figure) and electric discharge the second PMOS tube (V4 is indicated in figure)；Afterwards
The drain electrode of anode connection the first PMOS tube of electric discharge of standby capacitor, source electrode connection the second PMOS tube of electric discharge of the first PMOS tube of electric discharge
Drain electrode, output end of the source electrode for the second PMOS tube of discharging as standby capacitor charge and discharge circuit, and supplying power for outside；Electric discharge first
The grid of the second PMOS tube of grid and electric discharge of PMOS tube is shorted, and connects charge/discharge control circuit as the control terminal of discharge circuit
Output end.
Charge/discharge control circuit includes control of discharge pull-up resistor (R6 is indicated in figure) and control of discharge adjustable voltage stabilizer ((figure
Middle mark V6, model TL431)；The source electrode of one end connection the first PMOS tube of electric discharge of control of discharge pull-up resistor, control of discharge
The cathode of the other end connection control of discharge adjustable voltage stabilizer of pull-up resistor；The anode of control of discharge adjustable voltage stabilizer connects standby
The cathode of capacitor；Input terminal of the reference pole of control of discharge adjustable voltage stabilizer as charge/discharge control circuit, connection electric discharge starting electricity
The output end on road.
The start-up circuit that discharges includes electric discharge starting the first divider resistance (R15 is indicated in figure), electric discharge starting the second partial pressure electricity
Resistance (R16 is indicated in figure), electric discharge start switch pipe (V7 is indicated in figure), electric discharge starts switch pipe current-limiting resistance and (indicates in figure
R11) and electric discharge starts standby capacitance current-limiting resistance (R9 is indicated in figure)；The electric discharge starting first that normal power supply signal passes through concatenation
Divider resistance connects the cathode of standby capacitor with electric discharge the second divider resistance of starting；Electric discharge the first divider resistance of starting and electric discharge are opened
The voltage division signal of normal power supply signal is exported between dynamic second divider resistance, and connects the control terminal that electric discharge starts switch pipe；It puts
The cathode of movable end one end connection standby capacitor of electric switch pipe, the movable end other end connection for putting point driving switch pipe are put
One end of point driving switch pipe current-limiting resistance；One end of the anode connection electric discharge starting standby capacitance current-limiting resistance of standby capacitor；
The other end of electric discharge starting standby capacitance current-limiting resistance is connect and as putting with the other end that electric discharge starts switch pipe current-limiting resistance
The output end of circuit is electrically activated, while connecting the input terminal of charge/discharge control circuit.
Voltage detecting circuit is the resistor voltage divider circuit being made of concatenated resistance；In figure include resistance R5, R10, R13 and
Capacitor C2；Wherein, resistance R5, R10 and R13 constitutes resistor voltage divider circuit, wherein the voltage signal conduct on resistance R10 and R13
Sampled signal exports the voltage detection signal AD7 of farad capacitor and is uploaded to external circuit after being filtered by capacitor C2.
Above-mentioned standby capacitor charge and discharge circuit, the course of work are as follows:
CT_IN (charge power supply signal, can come from current transformer) through V1, V2, R1 to farad capacitor C1, between V1 and V2
Pull-up resistor R3 is connected through TL431 to ground, realizes charging to control grid voltage.Wherein, after R2, R7, R14, C3 divider filter
The control electrode for meeting TL431 is precisely controlled charge initiation voltage, and change charge initiation voltage can be realized by adjusting branch pressure voltage.And it should
Circuit is realized according to metal-oxide-semiconductor pressure drop automatically controls charging current, and CT takes and starts to charge when can be greater than system energy consumption, i.e., CT_IN is big
When a certain threshold value (such as 4V), V5 starts to work, and by V1, V2 grid voltage clamper to 2.5V, CT takes electric flux residue more,
CT_IN voltage is higher, and metal-oxide-semiconductor pressure drop is bigger, and equivalent impedance is smaller to realize that charging current is bigger, and metal-oxide-semiconductor is according to tube voltage drop
Increase is gradually opened until fully on, and smooth transition does not influence system power supply.
VCAP connection R4, R8, R12, C4 divide the control electrode for being followed by V8, (equivalent electricity in parallel with V8 after R7 and R14 connect
Resistance is customized for Ri).When VCAP is greater than given threshold (such as 5.4V), the TL431 control pole tension for triggering V8 starts to start work
Make, change the resistance value of Ri immediately, so that the control pole tension of V5 is lower than 2.5V, V5 stops working, and V1, V2 tube voltage drop are lower than
Beginning conducting voltage, which is realized, stops charging.
When the line current on equipment institute's hanging wire road is insufficient or breaks down, Current Transmit can not provide foot at this time
Enough electric energy, equipment should start backup power supply and maintain its work.VDD controls MOS state after connecing R15, R16 partial pressure, and VDD is normal
When work, V7 conducting, V6 controls pole tension and is less than 2.5V, and V6 does not work at this time, and the tube voltage drop of V3, V4 are lower than starting electric conduction
Pressure, is in close state；When VDD operating voltage is unstable or even powered-off fault, V7 is immediately turned off at this time, and V6 controls pole tension
It starts to work greater than 2.5V, V6, the grid voltage clamper of V3, V4 arrives 2.5V, and tube voltage drop makes switch conduction to the confession of rear class system
Electricity.Meanwhile when signal supplying power for outside, the presence or absence of the backup power supply power supply signal is detected, can be realized to normal power supply signal
It detects (such as abnormality detection, detection of power loss etc.).
Being charged and discharged circuit is double metal-oxide-semiconductor designs.Rectification two need to be added in major loop generally for the flow direction of control energy
Pole pipe, for low-power consumption product there are multiple tube voltage drops be it is inappropriate, which realizes reverse-filling using double metal-oxide-semiconductors designs
And diode drop is avoided, it realizes energy hole and high efficiency utilizes.
In capacitance voltage detection circuit, VCAP is after resistance R5, R10 and R13 partial pressure, by entering AD after capacitor filtering
Acquisition interface, the expansion interface can real-time or periodic monitor capacitance states.
It can be seen that technical solution of the present invention, circuit realizes the work and control of circuit using pure passive device
System does not need additional controller or control algolithm and participates in, and efficiency is higher, and reaction speed is fast.
It is illustrated in figure 3 the method flow schematic diagram of the charging/discharging thereof of standby capacitor charge and discharge circuit of the invention: this
The charging/discharging thereof for inventing this standby capacitor charge and discharge circuit provided, includes the following steps:
S1. charge power supply signal gives standby capacitor charging by charging circuit；
S2. charging control circuit control charging circuit work, to control the charging current of standby capacitor；
S3. charging enabling circuitry control charging control circuit work, to control the voltage when starting of standby capacitor charging
It is horizontal；
S4. starting control circuit control charging enabling circuitry work, so that the output voltage level in standby capacitor reaches
Stop charging when setting value；
S5. standby capacitor passes through discharge circuit electric discharge and supplying power for outside；
S6. charge/discharge control circuit control discharge circuit work, so that controlling standby capacitor starts electric discharge and supplying power for outside
Time；
S7. electric discharge start-up circuit control charge/discharge control circuit work, to control control of discharge according to normal power supply signal
The working time of circuit.
This standby capacitor charge and discharge circuit and its charging/discharging thereof provided by the present application, can be used for other it is any required into
The electronic equipment of row standby capacitor charge and discharge management, including all types of measuring instrument (such as electric energy meter, water meter, gas meter, flow meter, heat
Scale etc.), electric energy management terminal, distribution terminal, electric energy quality monitoring equipment, grid automation terminal, acquisition terminal, concentration
Device, data collector, measuring instrument, write by hand device, fault detector etc..
Claims (10)
1. a kind of standby capacitor charge and discharge circuit, including standby capacitor, it is characterised in that further include charging circuit, charge control electricity
Road, charging enabling circuitry, starting control circuit, discharge circuit, charge/discharge control circuit and electric discharge start-up circuit；Charge power supply signal
Standby capacitor is connected by charging circuit；The control terminal of the output end connection charging circuit of charging control circuit, thus after control
The charging process of standby capacitor；The input terminal of the output end connection charging control circuit of charging enabling circuitry, for starting charging control
Circuit processed；The output end for starting the input terminal connection standby capacitor of control circuit starts the output end connection charging of control circuit
The input terminal of start-up circuit, starting control circuit are used to be worked according to the output voltage control charging enabling circuitry of standby capacitor；
The output end connection discharge circuit of standby capacitor simultaneously externally provides backup power source；The output end connection electric discharge electricity of charge/discharge control circuit
The control terminal on road simultaneously controls discharge circuit work；The input terminal of electric discharge start-up circuit connects normal power supply signal, electric discharge starting electricity
The input terminal of the output end connection charge/discharge control circuit on road, electric discharge start-up circuit are used to control electric discharge control according to normal power supply signal
Circuit work processed.
2. standby capacitor charge and discharge circuit according to claim 1, it is characterised in that the charging circuit includes charging
First PMOS tube, the second PMOS tube of charging and charging current limiter resistance；The drain electrode for first PMOS tube that charges connects charge power supply signal,
The source electrode of source electrode connection the second PMOS tube of charging for first PMOS tube that charges, the drain electrode of the second PMOS tube of charging connect charging current limiter
One end of resistance, the anode of the other end connection standby capacitor of charging current limiter resistance；It includes the grid of the first PMOS tube of charging and fills
The grid of electric second PMOS tube is shorted and the output end as the control terminal of charging circuit connection charging control circuit.
3. standby capacitor charge and discharge circuit according to claim 3, it is characterised in that the charging control circuit includes
Charge control pull-up resistor and charge control adjustable voltage stabilizer；The cathode connection charge control pull-up of charge control adjustable voltage stabilizer
One end of resistance, while the cathode of charge control adjustable voltage stabilizer is also used as the output end of charging control circuit to connect charging circuit
Control terminal；The source electrode of other end connection the first PMOS tube of charging of charge control pull-up resistor；Charge control adjustable voltage stabilizer
Anode connection standby capacitor cathode；Input terminal of the reference pole of charge control adjustable voltage stabilizer as charging control circuit,
And connect the output end of charging enabling circuitry.
4. standby capacitor charge and discharge circuit according to claim 3, it is characterised in that the charging enabling circuitry includes
The first divider resistance of charge initiation, the second divider resistance of charge initiation, charge initiation third divider resistance, charge initiation filtered electrical
Hold and charge initiation adjustable voltage stabilizer；The first divider resistance of charge initiation, the second divider resistance of charge initiation and charge initiation
Three divider resistances are serially connected between charge power supply signal and the cathode of standby capacitor, for dividing to charge power supply signal；
The cathode of charge initiation adjustable voltage stabilizer is connected between the second divider resistance of the first divider resistance of charge initiation and charge initiation,
The cathode of the anode connection standby capacitor of charge initiation adjustable voltage stabilizer, the reference pole of charge initiation adjustable voltage stabilizer is as charging
The input terminal of start-up circuit, and connect the output end of starting control circuit；Charge initiation filter capacitor is attempted by charge initiation
The both ends of three divider resistances；Signal work all the way is exported between charge initiation the second divider resistance volume charge initiation third divider resistance
For the output end of charging enabling circuitry, and connect the input terminal of charging control circuit.
5. standby capacitor charge and discharge circuit according to claim 4, it is characterised in that the starting control circuit includes
Resistor voltage divider circuit and filter circuit；Resistor voltage divider circuit is attempted by the anode and cathode both ends of standby capacitor, for standby
The output voltage of capacitor is divided；Signal after partial pressure passes through the output after filter circuit filtering as starting control circuit
End, and connect the input terminal of charging enabling circuitry.
6. standby capacitor charge and discharge circuit according to claim 5, it is characterised in that the discharge circuit includes electric discharge
The second PMOS tube of first PMOS tube and electric discharge；The drain electrode of anode connection the first PMOS tube of electric discharge of standby capacitor, electric discharge first
The drain electrode of source electrode connection the second PMOS tube of electric discharge of PMOS tube, the source electrode for the second PMOS tube of discharging is as standby capacitor charge and discharge electricity
The output end on road, and supplying power for outside；The grid of the second PMOS tube of the grid of first PMOS tube of discharging and electric discharge is shorted, and as putting
The output end of the control terminal connection charge/discharge control circuit of circuit.
7. standby capacitor charge and discharge circuit according to claim 6, it is characterised in that the charge/discharge control circuit includes
Control of discharge pull-up resistor and control of discharge adjustable voltage stabilizer；One end connection the first PMOS tube of electric discharge of control of discharge pull-up resistor
Source electrode, control of discharge pull-up resistor the other end connection control of discharge adjustable voltage stabilizer cathode；Pressure stabilizing that control of discharge is adjustable
The cathode of the anode connection standby capacitor of device；Input of the reference pole of control of discharge adjustable voltage stabilizer as charge/discharge control circuit
End, the output end of connection electric discharge start-up circuit.
8. standby capacitor charge and discharge circuit according to claim 7, it is characterised in that the electric discharge start-up circuit includes
The first divider resistance of electric discharge starting, the second divider resistance of electric discharge starting, electric discharge starts switch pipe, electric discharge starts switch pipe current limliting electricity
Resistance and electric discharge starting standby capacitance current-limiting resistance；Normal power supply signal starts the first divider resistance and electric discharge by the electric discharge of concatenation
Start the cathode of the second divider resistance connection standby capacitor；Electric discharge the first divider resistance of starting and electric discharge the second divider resistance of starting
Between export the voltage division signal of normal power supply signal, and connect electric discharge and start switch the control terminal of pipe；Electric discharge starts switch pipe
Movable end one end connects the cathode of standby capacitor, and point driving switch pipe limit is put in the movable end other end connection for putting point driving switch pipe
One end of leakage resistance；One end of the anode connection electric discharge starting standby capacitance current-limiting resistance of standby capacitor；Electric discharge starting standby electricity
The other end of tolerance leakage resistance connect with the other end that electric discharge starts switch pipe current-limiting resistance and as the defeated of electric discharge start-up circuit
Outlet, while connecting the input terminal of charge/discharge control circuit.
9. the charging/discharging thereof of standby capacitor charge and discharge circuit described in a kind of one of claim 1~8, includes the following steps:
S1. charge power supply signal gives standby capacitor charging by charging circuit；
S2. charging control circuit control charging circuit work, to control the charging current of standby capacitor；
S3. charging enabling circuitry control charging control circuit work, to control the voltage level when starting of standby capacitor charging；
S4. starting control circuit control charging enabling circuitry work, so that the output voltage level in standby capacitor reaches setting
Stop charging when value；
S5. standby capacitor passes through discharge circuit electric discharge and supplying power for outside；
S6. charge/discharge control circuit control discharge circuit work, to control the time that standby capacitor starts electric discharge and supplying power for outside；
S7. electric discharge start-up circuit control charge/discharge control circuit work, to control charge/discharge control circuit according to normal power supply signal
Working time.
10. a kind of fault detector, it is characterised in that include the electricity of standby capacitor charge and discharge described in one of claim 1~8
Road and charging/discharging thereof as claimed in claim 9.
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| CN201910137864.0A CN109672255B (en) | 2019-02-25 | 2019-02-25 | Backup capacitor charging and discharging circuit, charging and discharging method and fault indicator thereof |
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| CN201910137864.0A CN109672255B (en) | 2019-02-25 | 2019-02-25 | Backup capacitor charging and discharging circuit, charging and discharging method and fault indicator thereof |
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| CN109672255B CN109672255B (en) | 2024-09-10 |
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| CN114709914A (en) * | 2022-03-22 | 2022-07-05 | 成都宏明电子股份有限公司 | Power supply circuit with temporary power supply and charge-discharge control functions and control method |
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