CN110138079A - Power supply safety protection system - Google Patents
Power supply safety protection system Download PDFInfo
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- CN110138079A CN110138079A CN201910575499.1A CN201910575499A CN110138079A CN 110138079 A CN110138079 A CN 110138079A CN 201910575499 A CN201910575499 A CN 201910575499A CN 110138079 A CN110138079 A CN 110138079A
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a power supply safety protection system, wherein a fault prediction circuit receives a voltage signal of a main power supply phase line L induced by a voltage transformer, when the deviation exceeds +/-7%, the voltage change rate is calculated, and when the deviation exceeds +/-9%, the fault is predicted, one path of the fault controls a normally closed switch K1-1 to be in delayed disconnection, a normally open switch K1-2 is closed, the main power supply is in delayed disconnection, a load storage pump circuit temporarily supplies power to a load, the other path of the fault controls the normally open switch K2-1 to be in delayed connection, and a backup power supply is started; when the failure prediction of the main power supply is normal, the charge storage pump circuit allows the energy storage circuit to charge and store electric energy, the electric energy is converted into AC220V through the booster circuit, and the load is supplied with power when the failure prediction of the main power supply is normal; the short circuit judging circuit detects current flowing in a load through a current transformer, when the short circuit occurs, the triode Q3 and the Q4 form a composite tube to be conducted, the coil of the relay K3 is electrified, and the normally closed contacts K3-1 and K3-2 are all disconnected, so that a main power supply, a backup power supply and a charge storage pump circuit do not supply power to the load.
Description
Technical field
The present invention relates to power supply control technology fields, protect system more particularly to a kind of power safety.
Background technique
Long-time hitless operation, highly reliable system are needed for some, such as base station communication apparatus, monitoring device, clothes
Business device etc. generally requires highly reliable power supply supply, and redundant power design is key component therein, and redundant power generally configures
2 or 2 or more power supplys, when 1 power supply breaks down, other power supplys can be put at once, not interrupt the normal fortune of equipment
Row.
Redundant power is divided into three kinds, and redundancy cold standby is (standby when its failure by one of power supply power supply when normal
Part power supply start at once devotes oneself to work), the N+1 of parallel current-sharing back up that (each power supply is connected in parallel by OR gate diode, simultaneously
To equipment power), redundancy backup (multiple power supplys work at the same time, but only from one of them to equipment power, other underloading),
There are time intervals when due to the switching of redundancy cold standby power supply, and the N+1 of voltage gap, parallel current-sharing is caused to back up in load short circuits
It is easy to involve all power supply units, and redundancy backup cost input is big, is not easy expanded, therefore, a kind of power supply need to be provided and cut
There is no time interval, load short circuits not to involve the redundant power of power supply when changing.
So the present invention provides the new scheme of one kind to solve the problems, such as this.
Summary of the invention
For above situation, for the defect for overcoming the prior art, purpose of the present invention is to provide a kind of power safety guarantors
Protecting system, have be skillfully constructed, the characteristic of human oriented design, there are time intervals, load when effective solution power supply switching
Short circuit can involve the problem of power supply.
Its technical solution solved is, including main power source, backup battery, load, and the main power source and backup battery are superfluous
Remaining power supply, when realizing mains power failure, backup battery is load supplying, which is characterized in that also sets up failure predication circuit, Chu He
Pump circuit, short-circuit decision circuit；
The failure predication circuit receives the voltage signal of the main power source phase line L of voltage transformer induction, be more than tolerance ±
When 7 ﹪, thyristor VTL1 triggering and conducting, voltage signal enters the integrating circuit that operational amplifier AR1 is core and calculates voltage
When change rate, the growth of voltage change ratio forward direction and voltage corresponding higher than ± 9 ﹪ of tolerance, it is predicted as failure, triode Q1
Conducting, trigger relay K1 coil obtains electric all the way, and string is delayed in the normally closed switch K1-1 of main power source phase line L and disconnects, normal open switch
K1-2 closure, another way after RC is delayed trigger triode Q2 be connected, relay K2 coil obtain it is electric, go here and there in backup battery phase line L
Normal open switch K2-1 timing closing；
For the storage lotus pump circuit when the prediction of failure predication circuit is normal, triode Q5 conducting, transformer T1 powers main power source
Voltage step-down, the bidirectional thyristor VS1 through being connected is to inductance L1, resistance R9, R10, R11 and capacitor after diode D6 rectification
The accumulator charging of C4, C5, C6 composition stores electric energy, the liter that charged voltage is formed through transformer T2, triode Q6, Q7
Volt circuit is converted to AC220V, and closed normally closed switch K1-2, normally closed switch K2-1, normally closed switch K3-1 power to the load；
The short circuit decision circuit is converted to electricity through resistance R14 by the electric current flowed through in current transformer TA1 detection load
Pressure, when being higher than the corresponding threshold voltage of short circuit current, triode Q3, Q4 form multiple tube conducting, and voltage is through resistance R17 and capacitor
After C8 delay, triggering thyristor VTL2 conducting, relay K3 coil obtains electric, and normally-closed contact K3-1, K3-2 are disconnected, and make main electricity
Source, backup battery, storage lotus pump circuit do not power to the load.
Due to the use of above technical scheme, the invention has the following advantages over the prior art: voltage transformer sense
The voltage signal of the main power source phase line L answered, when being more than tolerance ± 7 ﹪, thyristor VTL1 triggering and conducting, voltage signal enters
Operational amplifier AR1 is that the integrating circuit of core calculates voltage change ratio, and voltage change ratio forward direction, which increases and is higher than, to be allowed partially
When the corresponding voltage of ± 9 ﹪ of difference, prediction main power source is failure, and trigger relay K1 coil obtains electric all the way, is gone here and there in main power source phase line L
Normally closed switch K1-1 be delayed disconnect, normal open switch K1-2 closure, main power source delay disconnect, You Chuhe pump circuit is temporarily load
Power supply, another way trigger relay K2 coil after RC is delayed obtain electric, normal open switch K2-1 delay of the string in backup battery phase line L
Closure is load supplying by backup battery after backup battery starting, solves the problems, such as that power supply switches there are time interval,
Power supply gap is filled up using deferred action, storage lotus pump circuit simultaneously and avoids the problem of power supply accidentally switches；
When load short circuits, triode Q3, Q4 form multiple tube conducting, after being delayed, triggering thyristor VTL2 conducting, and relay K3
Coil obtains electric, and normally-closed contact K3-1, K3-2 are disconnected, and main power source, backup battery, storage lotus pump circuit is made not to power to the load,
Solves the problems, such as power failure caused by load short circuits.
Detailed description of the invention
Fig. 1 is failure predication circuit diagram of the invention.
Fig. 2 is storage lotus pump circuit schematic diagram of the invention.
Fig. 3 is short-circuit decision circuit schematic diagram of the invention.
Fig. 4 is structural block diagram of the invention.
Specific embodiment
For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to figures 1 through attached drawing 4
To in the detailed description of embodiment, can clearly present.The structure content being previously mentioned in following embodiment is with specification
Attached drawing is reference.
Each exemplary embodiment of the invention is described below with reference to accompanying drawings.
Embodiment one, a kind of power safety protect system, including main power source, backup battery, load, the main power source and standby
Part power supply is redundant power, and when realizing mains power failure, backup battery is load supplying, also sets up failure predication circuit, Chu He
Pump circuit, short-circuit decision circuit；
The failure predication circuit receives the voltage signal of the main power source phase line L of voltage transformer induction, be more than tolerance ±
When 7 ﹪, thyristor VTL1 triggering and conducting, voltage signal enters the integrating circuit that operational amplifier AR1 is core and calculates voltage
When change rate, the growth of voltage change ratio forward direction and voltage corresponding higher than ± 9 ﹪ of tolerance, it is predicted as failure, triode Q1
Conducting, trigger relay K1 coil obtains electric all the way, and string is delayed in the normally closed switch K1-1 of main power source phase line L and disconnects, normal open switch
K1-2 closure, another way after RC is delayed trigger triode Q2 be connected, relay K2 coil obtain it is electric, go here and there in backup battery phase line L
Normal open switch K2-1 timing closing, the problem of error in judgement pre- to avoid mains power failure using deferred action；
For the storage lotus pump circuit when the prediction of failure predication circuit is normal, triode Q5 conducting, transformer T1 powers main power source
Voltage step-down, the bidirectional thyristor VS1 through being connected is to inductance L1, resistance R9, R10, R11 and capacitor after diode D6 rectification
The accumulator charging of C4, C5, C6 composition stores electric energy, the liter that charged voltage is formed through transformer T2, triode Q6, Q7
Volt circuit is converted to AC220V, and closed normally closed switch K1-2, normally closed switch K2-1, normally closed switch K3-1 power to the load,
Namely when mains power failure occurs in advance, You Chuhe pump circuit is that load supplying is by backup battery after backup battery starting
Load supplying solves the problems, such as that there are time intervals for power supply switching, while filling up power supply using deferred action, storage lotus pump circuit
Gap avoids the problem of power supply accidentally switches；
The short circuit decision circuit is converted to electricity through resistance R14 by the electric current flowed through in current transformer TA1 detection load
Pressure, when being higher than the corresponding threshold voltage of short circuit current, triode Q3, Q4 form multiple tube conducting, and voltage is through resistance R17 and capacitor
After C8 delay, triggering thyristor VTL2 conducting, relay K3 coil obtains electric, and normally-closed contact K3-1, K3-2 are disconnected, and make main electricity
Source, backup battery, storage lotus pump circuit do not power to the load, solve the problems, such as power failure caused by load short circuits, realize
Power safety protection.
Embodiment two, on the basis of example 1, the short circuit decision circuit pass through current transformer TA1 detection load
In the electric current that flows through, be converted to voltage through resistance R14, being higher than the corresponding threshold voltage of short circuit current, (namely equipment operates normally
When 7 times of rated current) when, triode Q3, Q4 form multiple tube conducting, and voltage is after resistance R17 and capacitor C8 delay, triggering
Thyristor VTL2 conducting, relay K3 coil obtains electric, and normally-closed contact K3-1, K3-2 are disconnected, and make main power source, backup battery, storage
Lotus pump circuit does not power to the load, including current transformer TA1, and the one of the upper end connection resistance R14 of current transformer TA1
End, the other end of resistance R14 be separately connected one end of resistance R15, the base stage of triode Q4, triode Q3 collector, three poles
The collector of pipe Q4 connects power supply+4.7V, the emitter of triode Q4 be separately connected the base stage of triode Q3, resistance R16 one
End, one end of resistance R17, capacitor C8 one end, the emitter of the other end connecting triode Q3 of resistance R16, resistance R17's is another
One end connect thyristor VTL2 control electrode, the lower end of current transformer TA1, the other end of resistance R15, capacitor C8 it is another
End, thyristor VTL2 cathode be all connected with ground, the anode of thyristor VTL2 is separately connected relay K3 coil one end, diode D3
Anode, the cathode connection power supply+12V relay K3 normally-closed contact K3-1, normally closed of the relay K3 coil other end, diode D3
Contact one end K3-3 connection load RL one end, normally-closed contact K3-1, normally-closed contact K3-3 the other end distinguish it is closed after
One end of electric appliance K1 normally-closed contact K1-1, relay K2 normally-closed contact K2-1 connection fuse RUZ1, RUB1, fuse RUZ1,
The other end of RUB1 connects main power source phase line L, backup battery phase line L, load RL the other end it is closed relay K1 it is normally closed
One end of contact K1-1A, relay K2 normally-closed contact K2-1A connection fuse RUZ2, RUB2, fuse RUZ2, RUB2's is another
One end connects main power source phase line N, backup battery phase line N.
Embodiment three, on the basis of example 1, the failure predication circuit receive the main electricity of voltage transformer induction
Source phase line L 0-5V voltage signal (can be used no-load voltage ratio be 100/2 voltage transformer incuded), be more than tolerance ±
When 7 ﹪ namely power supply is lower than 204.6 or when being higher than 235.4, voltage-stabiliser tube Z1 or Z2 reverse breakdown, thyristor VTL1 triggering and conducting,
Voltage signal enters the integrating amplification circuit product of operational amplifier AR1, resistance R3- resistance R5, potentiometer RW1, capacitor C2 composition
Point, the voltage change ratio corresponding voltage signal of output certain time is calculated, integration time constant is by resistance R3, capacitor C2
It is worth size to determine, to avoid operational amplifier AR1 imbalance setting feedback resistance R5, potentiometer RW1 feedback potentiometer, for controlling
The amplification factor of integrating amplification circuit calculates the corresponding voltage signal of positive or negative voltage change ratio, after through operation amplifier
The absolute value circuit that device AR2, diode D1, D2 are formed calculates positive voltage signal, and voltage change ratio forward direction increases and is higher than
When the corresponding voltage of ± 9 ﹪ of tolerance namely power supply is lower than 200.2 or when being higher than 239.8, is predicted as failure, triode Q1
Conducting, trigger relay K1 coil obtains electric all the way, and string is delayed in the normally closed switch K1-1 of main power source phase line L and disconnects, normal open switch
K1-2 closure, trigger triode Q2 is connected after the delay circuit RC delay that another way is formed through resistance R7 and electrolytic capacitor E1, after
Electric appliance K2 coil obtains electric, to go here and there in backup battery phase line L normal open switch K2-1 timing closing, including voltage-stabiliser tube Z1, Z2, thyristor
VTL1, the anode of voltage-stabiliser tube Z2, the cathode of voltage-stabiliser tube Z1, thyristor VTL1 anode receive the main power source of voltage transformer induction
Voltage on middle phase line L, the cathode of voltage-stabiliser tube Z2 are separately connected one end of resistance R1, and the other end of resistance R1 is separately connected ground connection
One end of capacitor C1, the positive thyristor VTL1 control electrode of voltage-stabiliser tube Z1, ground resistance R2 one end, the control of thyristor VTL1
Pole connect resistance R3 one end, the other end of resistance R3 be separately connected the non-inverting input terminal of operational amplifier AR1, resistance R5 one
End, capacitor C2 one end, the inverting input terminal of operational amplifier AR1 be separately connected one end of resistance R4, potentiometer RW1 it is adjustable
End, the other end of resistance R4, the left end of potentiometer RW1 connect ground, and the output end of operational amplifier AR1 is separately connected resistance R5's
The other end, the other end of capacitor C2, the right end of potentiometer RW1, the anode of diode D1, diode D2 cathode, diode D2
Anode connection operational amplifier AR2 non-inverting input terminal, the inverting input terminal of operational amplifier AR2 is separately connected operation amplifier
The base stage of the output end of device AR2, the cathode of diode D1, triode Q1, the collector of triode Q1 are separately connected resistance R6's
One end, resistance R7 one end, the other end of resistance R6 is separately connected the anode of relay K1 coil one end, diode D4, relay
The device K1 coil other end connects power supply+5V with the cathode of diode D4 by the normally-closed contact K3-1 of relay K3, resistance R7's
The other end is separately connected the anode of the base stage electrolytic capacitor E1 of triode Q1, and the collector of triode Q2 connects the one of resistance R8
End, the other end of resistance R8 are separately connected the anode of relay K2 coil one end, diode D5, and the relay K2 coil other end is logical
The normally-closed contact K3-2 for crossing relay K3 connects power supply+5V with the cathode of diode D5.
Example IV, on the basis of example 1, the storage lotus pump circuit failure predication circuit prediction it is normal when or
When can't accept prediction signal, triode Q5 conducting allows transformer T1 to be depressured main power source supply voltage, whole through diode D6
The accumulator that bidirectional thyristor VS1 after stream through being connected is formed to inductance L1, resistance R9, R10, R11 and capacitor C4, C5, C6
Charging stores electric energy, and the conducting of bidirectional thyristor VS1 is acquired the electric flux of accumulator by potentiometer RP1, lower than 12V's
When 20 ﹪, the voltage-stabiliser tube Z3 through reverse breakdown is added to the control electrode of bidirectional thyristor VS1, and bidirectional thyristor VS1 triggering and conducting is filled
The booster circuit that voltage is formed through transformer T2, triode Q6, Q7 after electricity is converted to AC220V, closed normally closed switch K1-
2, normally closed switch K2-1, normally closed switch K3-1 power to the load, namely when mains power failure occurs, are negative for storage lotus pump circuit
Power supply is carried to be negative by this independent power source after backup battery starting and carry power supply, including step-down transformer T1, step-down transformer T1's
Primary is separately connected the phase line L and zero curve N of main power source, the emitter of secondary one end connecting triode Q5 of step-down transformer T1,
By capacitor C3 connection, the base stage connection operational amplifier AR2's of triode Q5 is defeated for the secondary other end of step-down transformer T1
Outlet, the main electrode 2 of the collector connection bidirectional thyristor VS1 of triode Q5, the main electrode 1 of bidirectional thyristor VS1 connect electricity
Feel L1 one end, the other end of inductance L1 be separately connected one end of resistance R9, one end of resistance R10, resistance R11 one end, electricity
Resistance R9, R10, resistance R11 the other end be separately connected one end of capacitor C4, C5, C6, the other end of capacitor C4, C5, C6 connect respectively
Connect the upper end of potentiometer RP1, the pin 2 of transformer T2, the adjustable end of potentiometer RP1 be separately connected one end of ground capacity C7,
The cathode of voltage-stabiliser tube Z3, the control electrode of the anode connection bidirectional thyristor VS1 of voltage-stabiliser tube Z3, the lower end of potentiometer RP1 connect ground,
The pin 1 of transformer T2 is separately connected one end of the collector of triode Q6, resistance R12, and the other end of resistance R12 connects three poles
The base stage of pipe Q7, the pin 3 of transformer T2 are separately connected one end of the collector of triode Q7, resistance R13, and resistance R13's is another
The base stage of one end connecting triode Q6, secondary one end of transformer T2 through sequentially connected relay K1 normally opened contact K1-2, after
Electric appliance K2 normally-closed contact K2-1, relay K3 normally-closed contact K3-1 and transformer T2 the secondary other end for load power supply is provided.
When the present invention is specifically used, the 0-5V voltage signal of the main power source phase line L of voltage transformer induction is more than to allow partially
When difference ± 7 ﹪ namely power supply is lower than 204.6 or when being higher than 235.4, voltage-stabiliser tube Z1 or Z2 reverse breakdown, thyristor VTL1 triggering
Conducting, voltage signal enter the integral amplification electricity of operational amplifier AR1, resistance R3- resistance R5, potentiometer RW1, capacitor C2 composition
Road integral, calculate output certain time the corresponding voltage signal of voltage change ratio, after through operational amplifier AR2, two poles
The absolute value circuit of pipe D1, D2 composition calculates positive voltage signal, voltage change ratio forward direction increase and be higher than tolerance ±
When the corresponding voltage of 9 ﹪ namely power supply is lower than 200.2 or when being higher than 239.8, is predicted as failure, and triode Q1 conducting is touched all the way
Generate relay K1 coil obtain it is electric, go here and there main power source phase line L normally closed switch K1-1 be delayed disconnect, normal open switch K1-2 closure, separately
Trigger triode Q2 is connected after the delay circuit RC delay formed all the way through resistance R7 and electrolytic capacitor E1, and relay K2 coil obtains
Electricity, go here and there backup battery phase line L normal open switch K2-1 timing closing, the storage lotus pump circuit failure predication circuit prediction just
When often or when can't accept prediction signal, triode Q5 conducting allows transformer T1 to be depressured main power source supply voltage, through two poles
The storage that the bidirectional thyristor VS1 through being connected is formed to inductance L1, resistance R9, R10, R11 and capacitor C4, C5, C6 after pipe D6 rectification
Energy circuit charging, stores electric energy, and the conducting of bidirectional thyristor VS1 is lower than by the electric flux of potentiometer RP1 acquisition accumulator
When 20 ﹪ of 12V, the voltage-stabiliser tube Z3 through reverse breakdown is added to the control electrode of bidirectional thyristor VS1, bidirectional thyristor VS1 triggering
Conducting, the booster circuit that charged voltage is formed through transformer T2, triode Q6, Q7 are converted to AC220V, and closed is normally closed
Switch K1-2, normally closed switch K2-1, normally closed switch K3-1 power to the load, namely when mains power failure occurs in advance, You Chuhe
Pump circuit is load supplying, is load supplying by backup battery after backup battery starting, and solving power supply switching, there are the times
The problem of interval, the short circuit decision circuit are turned by the electric current flowed through in current transformer TA1 detection load through resistance R14
It is changed to voltage, when being higher than the corresponding threshold voltage of short circuit current while operating normally (namely equipment 7 times of rated current), triode
Q3, Q4 form multiple tube conducting, and voltage is after resistance R17 and capacitor C8 delay, triggering thyristor VTL2 conducting, relay K3 line
Enclose electric, normally-closed contact K3-1, K3-2 are disconnected, and so that main power source, backup battery, storage lotus pump circuit is not powered to the load, are solved
Determined power failure caused by load short circuits the problem of.
Claims (4)
1. a kind of power safety protects system, including main power source, backup battery, load, the main power source and backup battery are superfluous
Remaining power supply, when realizing mains power failure, backup battery is load supplying, which is characterized in that also sets up failure predication circuit, Chu He
Pump circuit, short-circuit decision circuit；
The failure predication circuit receives the voltage signal of the main power source phase line L of voltage transformer induction, be more than tolerance ±
When 7 ﹪, thyristor VTL1 triggering and conducting, voltage signal enters the integrating circuit that operational amplifier AR1 is core and calculates voltage
When change rate, the growth of voltage change ratio forward direction and voltage corresponding higher than ± 9 ﹪ of tolerance, it is predicted as failure, triode Q1
Conducting, trigger relay K1 coil obtains electric all the way, and string is delayed in the normally closed switch K1-1 of main power source phase line L and disconnects, normal open switch
K1-2 closure, another way after RC is delayed trigger triode Q2 be connected, relay K2 coil obtain it is electric, go here and there in backup battery phase line L
Normal open switch K2-1 timing closing；
For the storage lotus pump circuit when the prediction of failure predication circuit is normal, triode Q5 conducting, transformer T1 powers main power source
Voltage step-down, the bidirectional thyristor VS1 through being connected is to inductance L1, resistance R9, R10, R11 and capacitor after diode D6 rectification
The accumulator charging of C4, C5, C6 composition stores electric energy, the liter that charged voltage is formed through transformer T2, triode Q6, Q7
Volt circuit is converted to AC220V, and closed normally closed switch K1-2, normally closed switch K2-1, normally closed switch K3-1 power to the load；
The short circuit decision circuit is converted to electricity through resistance R14 by the electric current flowed through in current transformer TA1 detection load
Pressure, when being higher than the corresponding threshold voltage of short circuit current, triode Q3, Q4 form multiple tube conducting, and voltage is through resistance R17 and capacitor
After C8 delay, triggering thyristor VTL2 conducting, relay K3 coil obtains electric, and normally-closed contact K3-1, K3-2 are disconnected, and make main electricity
Source, backup battery, storage lotus pump circuit do not power to the load.
2. a kind of power safety protects system as described in claim 1, which is characterized in that the short circuit decision circuit includes electric current
One end of the upper end connection resistance R14 of mutual inductor TA1, current transformer TA1, the other end of resistance R14 are separately connected resistance R15
One end, the base stage of triode Q4, triode Q3 collector, the collector of triode Q4 connects power supply+4.7V, triode Q4
Emitter be separately connected the base stage of triode Q3, one end of resistance R16, one end of resistance R17, capacitor C8 one end, resistance
The emitter of the other end connecting triode Q3 of R16, the control electrode of the other end connection thyristor VTL2 of resistance R17, electric current are mutual
The lower end of sensor TA1, the other end of resistance R15, the other end of capacitor C8, thyristor VTL2 cathode be all connected with ground, thyristor
The anode of VTL2 is separately connected the anode of relay K3 coil one end, diode D3, the relay K3 coil other end, diode D3
Cathode connect power supply+12V, relay K3 normally-closed contact K3-1, the one end normally-closed contact K3-3 connection load RL one end, it is normally closed
Contact K3-1, normally-closed contact K3-3 the other end distinguish closed relay K1 normally-closed contact K1-1, the normally closed touching of relay K2
One end of point K2-1 connection fuse RUZ1, RUB1, other end connection main power source phase line L, the backup electricity of fuse RUZ1, RUB1
Source phase line L loads the closed relay K1 normally-closed contact K1-1A of the other end of RL, relay K2 normally-closed contact K2-1A connection
The other end of one end of fuse RUZ2, RUB2, fuse RUZ2, RUB2 connects main power source phase line N, backup battery phase line N.
3. a kind of power safety protects system as described in claim 1, which is characterized in that the failure predication circuit includes pressure stabilizing
Pipe Z1, Z2, thyristor VTL1, the anode of voltage-stabiliser tube Z2, the cathode of voltage-stabiliser tube Z1, thyristor VTL1 anode receive mutual induction of voltage
Voltage in the main power source of device induction on phase line L, the cathode of voltage-stabiliser tube Z2 are separately connected one end of resistance R1, and resistance R1's is another
End be separately connected one end of ground capacity C1, the positive thyristor VTL1 control electrode of voltage-stabiliser tube Z1, ground resistance R2 one end, it is brilliant
One end of the control electrode connection resistance R3 of brake tube VTL1, the other end of resistance R3 are separately connected the same mutually defeated of operational amplifier AR1
Enter end, one end of resistance R5, capacitor C2 one end, the inverting input terminal of operational amplifier AR1 be separately connected resistance R4 one end,
The adjustable end of potentiometer RW1, the other end of resistance R4, the left end of potentiometer RW1 connect ground, the output end of operational amplifier AR1
It is separately connected the other end of resistance R5, the other end of capacitor C2, the right end of potentiometer RW1, the anode of diode D1, diode D2
Cathode, diode D2 anode connection operational amplifier AR2 non-inverting input terminal, the inverting input terminal of operational amplifier AR2
It is separately connected the base stage of the output end of operational amplifier AR2, the cathode of diode D1, triode Q1, the collector of triode Q1
It is separately connected one end of resistance R6, one end of resistance R7, the other end of resistance R6 is separately connected relay K1 coil one end, two poles
The anode of pipe D4, the relay K1 coil other end connect electricity with the cathode of diode D4 by the normally-closed contact K3-1 of relay K3
Source+5V, the other end of resistance R7 are separately connected the anode of the base stage electrolytic capacitor E1 of triode Q1, and the collector of triode Q2 connects
One end of connecting resistance R8, the other end of resistance R8 are separately connected the anode of relay K2 coil one end, diode D5, relay K2
The coil other end connects power supply+5V with the cathode of diode D5 by the normally-closed contact K3-2 of relay K3.
4. a kind of power safety protects system as described in claim 1, which is characterized in that the storage lotus pump circuit includes that decompression becomes
Depressor T1, the primary of step-down transformer T1 are separately connected the phase line L and zero curve N of main power source, secondary one end of step-down transformer T1
The emitter of connecting triode Q5, the secondary other end of step-down transformer T1 by capacitor C3 connection, the base stage of triode Q5
Connect the output end of operational amplifier AR2, the main electrode 2 of the collector connection bidirectional thyristor VS1 of triode Q5, two-way crystalline substance lock
The main electrode 1 of pipe VS1 connects one end of inductance L1, the other end of inductance L1 be separately connected one end of resistance R9, resistance R10 one
End, resistance R11 one end, resistance R9, R10, resistance R11 the other end be separately connected one end of capacitor C4, C5, C6, capacitor C4,
The other end of C5, C6 are separately connected the pin 2 of the upper end of potentiometer RP1, transformer T2, and the adjustable end of potentiometer RP1 connects respectively
Connect one end of ground capacity C7, the cathode of voltage-stabiliser tube Z3, the control electrode of the anode connection bidirectional thyristor VS1 of voltage-stabiliser tube Z3, electricity
The lower end of position device RP1 connects ground, and the pin 1 of transformer T2 is separately connected one end of the collector of triode Q6, resistance R12, electricity
The base stage of the other end connecting triode Q7 of R12 is hindered, the pin 3 of transformer T2 is separately connected the collector of triode Q7, resistance
One end of R13, the base stage of the other end connecting triode Q6 of resistance R13, secondary one end of transformer T2 through it is sequentially connected after
The secondary of electric appliance K1 normally opened contact K1-2, relay K2 normally-closed contact K2-1, relay K3 normally-closed contact K3-1 and transformer T2
The other end provides power supply for load.
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| CN201910575499.1A CN110138079B (en) | 2019-06-28 | 2019-06-28 | Power supply safety protection system |
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| CN201910575499.1A CN110138079B (en) | 2019-06-28 | 2019-06-28 | Power supply safety protection system |
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| CN110988445A (en) * | 2019-12-31 | 2020-04-10 | 国网河南省电力公司信息通信公司 | Power grid operation data acquisition system |
| CN111952973A (en) * | 2020-08-31 | 2020-11-17 | 郑州工程技术学院 | Power supply circuit of transfer robot |
| CN113363932A (en) * | 2021-06-07 | 2021-09-07 | 山东建筑大学 | Series short-circuit fault detection and protection circuit based on electrolytic capacitor |
| CN114660500A (en) * | 2022-05-19 | 2022-06-24 | 秦皇岛广控科技有限公司 | Three-phase monitoring protection system |
| CN116742786A (en) * | 2023-08-14 | 2023-09-12 | 四川中久大光科技有限公司 | Laser seed source and main control loop safety power supply circuit |
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| CN108092271A (en) * | 2017-12-15 | 2018-05-29 | 河南工业职业技术学院 | Phase three-wire three series type dynamic voltage compensation device |
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| CN104682542A (en) * | 2013-11-28 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | Emergency illumination lamp control circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110988445A (en) * | 2019-12-31 | 2020-04-10 | 国网河南省电力公司信息通信公司 | Power grid operation data acquisition system |
| CN110988445B (en) * | 2019-12-31 | 2021-11-30 | 国网河南省电力公司信息通信公司 | Power grid operation data acquisition system |
| CN111952973A (en) * | 2020-08-31 | 2020-11-17 | 郑州工程技术学院 | Power supply circuit of transfer robot |
| CN113363932A (en) * | 2021-06-07 | 2021-09-07 | 山东建筑大学 | Series short-circuit fault detection and protection circuit based on electrolytic capacitor |
| CN114660500A (en) * | 2022-05-19 | 2022-06-24 | 秦皇岛广控科技有限公司 | Three-phase monitoring protection system |
| CN116742786A (en) * | 2023-08-14 | 2023-09-12 | 四川中久大光科技有限公司 | Laser seed source and main control loop safety power supply circuit |
| CN116742786B (en) * | 2023-08-14 | 2023-10-20 | 四川中久大光科技有限公司 | Laser seed source and main control loop safety power supply circuit |
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| CN110138079B (en) | 2020-02-18 |
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Effective date of registration: 20220510 Address after: 250000 room 1007, building 2, China Railway Caizhi center, No. 59, Gongye South Road, high tech Zone, Jinan, Shandong Province Patentee after: Jinan Huiheng Electric Co.,Ltd. Address before: No. 18, Ying Cai street, Hui Ji District, Zhengzhou, Henan Province Patentee before: ZHENGZHOU University OF TECHNOLOGY |