CN103779831B - SCM Based three-phase self-resetting type over voltage protector - Google Patents
SCM Based three-phase self-resetting type over voltage protector Download PDFInfo
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- 238000001914 filtration Methods 0.000 claims description 9
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
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Abstract
The present invention relates to a kind of SCM Based three-phase self-resetting type over voltage protector.Existing overvoltage, under-voltage protection product for three-phase voltage protect little, and use step-down transformer complete voltage detecting, this results in systemic-function cannot Complete Synchronization.The protector of the present invention is made up of power circuit, voltage detecting sample circuit, single chip machine controlling circuit and drive circuit of magnetic latching relay；The input of power circuit is three-phase electricity end of incoming cables, and outfan is single chip machine controlling circuit and drive circuit of magnetic latching relay；The input of voltage detecting sample circuit is three-phase electricity end of incoming cables, and outfan is single chip machine controlling circuit；The outfan of single chip machine controlling circuit is drive circuit of magnetic latching relay, and single chip machine controlling circuit receives voltage signal conversion and judges, then exports to drive circuit of magnetic latching relay through delays time to control.Volume of the present invention is little, length in service life, concordance are good, can realize protecting the accurate adjustment of voltage parameter, and protection is reliable.
Description
Technical field
The present invention relates to the over voltage protection device of a kind of power supply, be specifically related to a kind of SCM Based three-phase self-resetting type over voltage protector.
Background technology
Within 2008, rise in " design of civil buildings specification " JGJ16-2008 of execution and specify, " short circuit, overload and mistake, under-voltage protector should be installed in the end of incoming cables of Residential distribution box ".The most commercially available is mostly individual event Self-recover overvoltage-undervoltage protector, it is adaptable to home dwelling etc. use, but other bigger Tenement such as hotel, villas etc. have the most higher requirement to Electrical Safety, and individual event protector can not meet.The existing overvoltage for three-phase electricity on market, undervoltage protection system are all to form by three independent single-phase simple concatenation; the most this usage is due to the limitation of tectonic sieving own; can not realize synchronizing, so can not play a protective role in reality uses.
Summary of the invention
It is an object of the invention to provide a kind of SCM Based three-phase self-resetting type over voltage protector being applicable to large-scale property, power consumption is lower, more reliable, service life is longer.
The technical solution adopted in the present invention is:
SCM Based three-phase self-resetting type over voltage protector, it is characterised in that:
Described protector is made up of power circuit, voltage detecting sample circuit, single chip machine controlling circuit and drive circuit of magnetic latching relay；
The input of described power circuit is three-phase electricity end of incoming cables, and outfan is single chip machine controlling circuit and drive circuit of magnetic latching relay；
The input of described voltage detecting sample circuit is three-phase electricity end of incoming cables, and outfan is single chip machine controlling circuit；
The outfan of described single chip machine controlling circuit is drive circuit of magnetic latching relay；
The voltage signal that single chip machine controlling circuit receives voltage detecting sample circuit and provides carries out conversion judgement, then exports to drive circuit of magnetic latching relay through delays time to control, i.e. judges sampling voltage over voltage situation.
In described power circuit, three-phase phase voltage A, B, C divide three tunnel inputs, phase voltage A, N are through varistor RV1 in parallel, after the most filtered device C1 filtering, the first via, through resistance R1 dividing potential drop, is filtered by wave filter C2, give diode D1, D2 and electric capacity E1 carries out the flat ripple of halfwave rectifier, produce DC power supply, then send into mu balanced circuit chip TL7812 through resistance R9 and R2, audion Q5, resistance R3 and diode D4, it export 12V DC source；Second road is delivered to power supply chip TL7805 and is formed+5V power supply；
B, C are biphase identical with A phase.
Described voltage detecting sample circuit gathers A, B, C three-phase electricity, provides voltage signal for single-chip microcomputer；A phase electricity completes halfwave rectifier through diode D3, filters blood pressure lowering through resistance R14, electric capacity E2, by adjustable resistance W1 Gather and input signal, sends into single chip machine controlling circuit through electric capacity E3 filtering；
B, C are biphase identical with A phase.
Described single chip machine controlling circuit includes single-chip microcomputer U2, electric capacity C7, stabilivolt Z1, Z2, Z3；
+ 5V the power supply that power circuit provides provides power supply for single-chip microcomputer U2, and between its both positive and negative polarity, shunt-wound capacitance C7 completes filtering；Stabilivolt Z1-Z3 is that sampled input voltage signal provides abnormal protection, and its voltage stabilizing value be+5.1V, gathers signal value and is generally 1.5～3V, once inputs exception, and when signal value is more than+5.1V, stabilivolt punctures input voltage value is clamped on voltage stabilizing value, protection single-chip microcomputer；
A, B, C three-phase voltage signal that voltage detecting sample circuit gathers sends into single-chip microcomputer U2, becomes digital signal, compares generation over voltage and default phase signal with setting value, be respectively used to driven for emitting lights diode L1-L4 and show protector state after internal A/D conversion；Meanwhile, the signal output order of generation exports to drive circuit of magnetic latching relay, is switched on or switched off protected main circuit according to detection limit size.
Described drive circuit of magnetic latching relay includes magnetic latching relay K3, audion Q1-Q4 and resistance R6, R7, R10, R11, R19, R20, R21 and R22；
Resistance R7, R10, R19, R20 and Q1, Q3 form one group of power amplification circuit, during single-chip microcomputer U2 output order, its high level signal extremely forms loop through resistance R10, audion Q3, make audion Q3 turn on, so that+12V power supply is through audion Q1, resistance R20, audion Q3 extremely, make audion Q1 turn on, then+12V power supply adds to magnetic latching relay K3 coil through audion Q1, driving magnetic latching relay K3 work, its main contacts closes, and connects three phase mains main circuit；
When there is over voltage fault in power supply; single-chip microcomputer U2 output order, through resistance R11, R6, audion Q2, Q4, the power amplification circuit of resistance R21, R22 composition, is sent into reverse impulse to 1,2 ends of magnetic latching relay K3 and is driven signal so that it is state inverts; main contacts disconnects, and protects main circuit.
The invention have the advantages that
The over voltage protection system that the present invention relates to has that power consumption is little, reliable operation, length in service life, advantage that concordance is good；And, main control unit uses Single-chip Controlling, can realize comparing voltage and arbitrarily arrange.
Accompanying drawing explanation
Fig. 1 is power circuit diagram (A phase).
Fig. 2 is voltage detecting sample circuit figure (A phase).
Fig. 3 is single chip machine controlling circuit figure.
Fig. 4 is drive circuit of magnetic latching relay.
Fig. 5 SCM Based three-phase self-resetting type over voltage protector software flow pattern.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be described in detail.
One involved in the present invention SCM Based three-phase self-resetting type over voltage protector; it is made up of power circuit, voltage detecting sample circuit, single chip machine controlling circuit and drive circuit of magnetic latching relay; the input of power circuit is three-phase electricity end of incoming cables, and outfan is single chip machine controlling circuit and drive circuit of magnetic latching relay；The input of voltage detecting sample circuit is three-phase electricity end of incoming cables, and outfan is single chip machine controlling circuit；The outfan of single chip machine controlling circuit is drive circuit of magnetic latching relay.The voltage signal that single chip machine controlling circuit receives voltage detecting sample circuit and provides carries out conversion judgement, then exports to drive circuit of magnetic latching relay through delays time to control, i.e. judges sampling voltage over voltage situation.During protector work, power circuit input three-phase voltage DC source needed for integrated stable voltage circuit generation system；Voltage detecting sample circuit gathers A, B, C three-phase electricity, provides voltage signal for single-chip microcomputer；Single chip control unit circuit completes through internal A/D conversion, the voltage signal detected is carried out judgement process；Three-phase magnetic latching relay accepts single-chip microcomputer output control instruction, by drive circuit drive actions, completes the protection to main power source.
The present invention has following structure function feature: (1) uses special integrated stable voltage circuit voltage stabilizing, it is provided that system single-chip microcomputer and the working power of magnetic latching relay；(2) Chip Microcomputer A/D converter sampling input signal and reference signal circuit, in order to input three-phase voltage and the reference voltage of sampling respectively；(3) single-chip microcomputer is to input and reference signal samples, automatic decision overvoltage, under-voltage；(4) single-chip microcomputer and drive circuit output over voltage signal, produce the energy driving magnetic latching relay；(5) dedicated magnetic guard relay is as executor, the final break-make controlling three phase mains.
See Fig. 1, in power circuit, three-phase phase voltage A, B, C divide three tunnels inputs, and phase voltage A, N are through varistor RV1 in parallel, then after filtered device C1 filtering, the first via is through resistance R1 dividing potential drop, filtered by wave filter C2, give diode D1, D2 and electric capacity E1 carries out the flat ripple of halfwave rectifier, produce DC power supply, then send into mu balanced circuit chip TL7812 through resistance R9 and R2, audion Q5, resistance R3 and diode D4, it export 12V DC source；Second road is delivered to power supply chip TL7805 and is formed+5V power supply.B, C are biphase identical with A phase.
Seeing Fig. 2, voltage detecting sample circuit gathers A, B, C three-phase electricity, provides voltage signal for single-chip microcomputer；A phase electricity completes halfwave rectifier through diode D3, filters blood pressure lowering through resistance R14, electric capacity E2, by adjustable resistance W1 Gather and input signal, sends into single chip machine controlling circuit through electric capacity E3 filtering.B, C are biphase identical with A phase.
Seeing Fig. 3, single chip machine controlling circuit includes single-chip microcomputer U2, electric capacity C7, stabilivolt Z1, Z2, Z3.+ 5V the power supply that power circuit provides provides power supply for single-chip microcomputer U2, and between its both positive and negative polarity, shunt-wound capacitance C7 completes filtering；Stabilivolt Z1-Z3 is that sampled input voltage signal provides abnormal protection, and its voltage stabilizing value be+5.1V, gathers signal value and is generally 1.5～3V, once inputs exception, and when signal value is more than+5.1V, stabilivolt punctures input voltage value is clamped on voltage stabilizing value, protection single-chip microcomputer.A, B, C three-phase voltage signal that voltage detecting sample circuit gathers sends into single-chip microcomputer U2, becomes digital signal, compares generation over voltage and default phase signal with setting value, be respectively used to driven for emitting lights diode L1-L4 and show protector state after internal A/D conversion；Meanwhile, the signal output order of generation exports to drive circuit of magnetic latching relay, is switched on or switched off protected main circuit according to detection limit size.
Seeing Fig. 4, drive circuit of magnetic latching relay includes magnetic latching relay K3, audion Q1-Q4 and resistance R6, R7, R10, R11, R19, R20, R21 and R22.Resistance R7, R10, R19, R20 and Q1, Q3 form one group of power amplification circuit, during single-chip microcomputer U2 output order, its high level signal extremely forms loop through resistance R10, audion Q3, make audion Q3 turn on, so that+12V power supply is through audion Q1, resistance R20, audion Q3 extremely, make audion Q1 turn on, then+12V power supply adds to magnetic latching relay K3 coil through audion Q1, driving magnetic latching relay K3 work, its main contacts closes, and connects three phase mains main circuit.When there is over voltage fault in power supply; single-chip microcomputer U2 output order, through resistance R11, R6, audion Q2, Q4, the power amplification circuit of resistance R21, R22 composition, is sent into reverse impulse to 1,2 ends of magnetic latching relay K3 and is driven signal so that it is state inverts; main contacts disconnects, and protects main circuit.
Voltage detecting sample circuit inputs single-chip microcomputer U2, single-chip microcomputer U2 detection real-time to line voltage power supply signal, when detecting that voltage is within normal range, single-chip microcomputer U2 sends pulse adhesive instruction to drive circuit of magnetic latching relay.Drive circuit of magnetic latching relay drives the pull-in winding of magnetic latching relay, completes to close a floodgate, powering load.If because of electric network source fault cause overtension or too low and exceed setting after, then start-up study, after delay arrival time, then sent the instruction of pulse separating brake by single-chip microcomputer U2, drive magnetic latching relay switching winding through drive circuit of magnetic latching relay again, complete separating brake, stop powering to the load.After cut-out powers to the load, single-chip microcomputer U2 detects line voltage the most in real time, when line voltage recovers to normal value, single-chip microcomputer U2 starts runback time delay, to prevent voltage from recovering suddenly, power supply de-stabilising effect user power utilization during power supply, after delay arrival time, sent pulse adhesive instruction by single-chip microcomputer U2 to drive circuit of magnetic latching relay, complete the combined floodgate that automatically resets, recover powering load.Such time delay designs, and both ensure that power supply continuity, it is also possible to the safety utilization of electric power of protection electrical equipment.
Present disclosure is not limited to cited by embodiment, and the conversion of any equivalence that technical solution of the present invention is taked by those of ordinary skill in the art by reading description of the invention, the claim being the present invention is contained.
Claims (1)
- The guard method of the most SCM Based three-phase self-resetting type over voltage protector, it is characterised in that:Described protector is made up of power circuit, voltage detecting sample circuit, single chip machine controlling circuit and drive circuit of magnetic latching relay；The input termination three-phase electricity end of incoming cables of described power circuit, outfan connects single chip machine controlling circuit and drive circuit of magnetic latching relay；The input termination three-phase electricity end of incoming cables of described voltage detecting sample circuit, outfan connects single chip machine controlling circuit；The output termination drive circuit of magnetic latching relay of described single chip machine controlling circuit；The voltage signal that single chip machine controlling circuit receives voltage detecting sample circuit and provides carries out conversion judgement, then exports to drive circuit of magnetic latching relay through delays time to control, i.e. judges sampling voltage over voltage situation；nullIn described power circuit，Three-phase phase voltage A、B、C divides three tunnel inputs，A end connects one end of varistor RV1 respectively、One end of wave filter C1、One end of resistance R1 and one end of wave filter C2，N end connects the other end of varistor RV1 respectively、The other end of wave filter C1、The positive pole of diode D1 and the negative pole of electric capacity E1，The other end of resistance R1、The other end of wave filter C2 and the negative pole of diode D1 access the positive pole of diode D2 in the lump，The negative pole of diode D2 and the positive pole of electric capacity E1 are respectively connected to one end of resistance R9，The other end of resistance R9 connects base stage and one end of resistance R2 of audion Q5 respectively，The emitter stage of another termination audion Q5 of resistance R2，One end of the colelctor electrode connecting resistance R3 of audion Q5，The positive pole of another terminating diode D4 of resistance R3，The negative pole of diode D4 accesses mu balanced circuit chip TL7812，The negative pole of diode D2、The positive pole of electric capacity E1、One end of resistance R9、The other end of resistance R3 and the positive pole of diode D4 are respectively connected to power supply chip TL7805；Ground connection after ground connection after the positive pole of diode D1 and the negative pole connection of electric capacity E1, the other end of resistance R2 and the emitter stage connection of audion Q5；Phase voltage A, N are through varistor RV1 in parallel, point two-way output after the most filtered device C1 filtering, the first via is through resistance R1 dividing potential drop, filtered by wave filter C2, give diode D1, D2 and electric capacity E1 carries out the flat ripple of halfwave rectifier, produce DC power supply, then send into mu balanced circuit chip TL7812 through resistance R9 and R2, audion Q5, resistance R3 and diode D4, mu balanced circuit chip TL7812 export 12V DC source；Second road is delivered to power supply chip TL7805 and is formed+5V power supply；In power circuit, B, C are biphase identical with A phase；Described voltage detecting sample circuit gathers A, B, C three-phase electricity, provides voltage signal for single-chip microcomputer；The positive pole of A terminating diode D3, one end of the negative pole connecting resistance R14 of diode D3, the other end of resistance R14 connects positive pole and one end of adjustable resistance W1 of electric capacity E2 respectively, the negative pole of another termination capacitor E3 of adjustable resistance W1, the electric shock of sliding of adjustable resistance W1 connects the positive pole of electric capacity E3, and the positive pole of electric capacity E3 accesses single chip machine controlling circuit in the lump with the slip electric shock of adjustable resistance W1；The minus earth of electric capacity E2, the negative pole of electric capacity E3 be connected with the other end of adjustable resistance W1 after ground connection；A phase electricity completes halfwave rectifier through diode D3, filters blood pressure lowering through resistance R14, electric capacity E2, by adjustable resistance W1 Gather and input signal, sends into single chip machine controlling circuit through electric capacity E3 filtering；In voltage detecting sample circuit, B, C are biphase identical with A phase；Described single chip machine controlling circuit includes single-chip microcomputer U2, electric capacity C7, stabilivolt Z1, Z2, Z3；+ 5V the power supply that power circuit provides provides power supply for single-chip microcomputer U2, and between+5V power positive cathode, shunt-wound capacitance C7 completes filtering；Stabilivolt Z1-Z3 provides abnormal protection for sampled input voltage signal, and stabilivolt Z1-Z3 voltage stabilizing value is+5.1V, and gathering signal value is 1.5～3V; once input exception; when signal value is more than+5.1V, stabilivolt punctures input voltage value is clamped on voltage stabilizing value, protects single-chip microcomputer；A, B, C three-phase voltage signal that voltage detecting sample circuit gathers sends into single-chip microcomputer U2, becomes digital signal, compares generation over voltage and default phase signal with setting value, be respectively used to driven for emitting lights diode L1-L4 and show protector state after internal A/D conversion；Meanwhile, the signal output order of generation exports to drive circuit of magnetic latching relay, is switched on or switched off protected main circuit according to detection limit size；Described drive circuit of magnetic latching relay includes magnetic latching relay K3, audion Q1-Q4 and resistance R6, R7, R10, R11, R19, R20, R21 and R22；One end of resistance R10 connects base stage and one end of resistance R7 of audion Q3 respectively, the other end of the emitter stage connecting resistance R7 of audion Q3, one end of the colelctor electrode connecting resistance R20 of audion Q3, one end of the other end of resistance R20 connecting resistance R19 respectively and the base stage of audion Q1, the other end of the emitter stage connecting resistance 19 of audion Q1, the colelctor electrode of audion Q1 connects 3 ends of magnetic latching relay K3；One end of resistance R11 connects base stage and one end of resistance R6 of audion Q4 respectively, the other end of the emitter stage connecting resistance R6 of audion Q4, one end of the colelctor electrode connecting resistance R22 of audion Q4, one end of the other end of resistance R22 connecting resistance R21 respectively and the base stage of audion Q2, the other end of the emitter stage connecting resistance 21 of audion Q2, the colelctor electrode of audion Q2 connects 1 end of magnetic latching relay K3；Ground connection after ground connection after the emitter stage of audion Q3 and the other end connection of resistance R7, the emitter stage of audion Q4 and the other end connection of resistance R6, the 2 end ground connection of magnetic latching relay K3；Resistance R7, R10, R19, R20 and Q1, Q3 form one group of power amplification circuit, during single-chip microcomputer U2 output order, its high level signal extremely forms loop through resistance R10, audion Q3, audion Q3 is made to turn on, so that+12V power supply is through audion Q1, resistance R20, audion Q3 extremely, audion Q1 is made to turn on, then+12V power supply adds to magnetic latching relay K3 coil through audion Q1, drive magnetic latching relay K3 work, magnetic latching relay K3 main contacts closes, and connects three phase mains main circuit；When there is over voltage fault in power supply; single-chip microcomputer U2 output order is through resistance R11, R6, audion Q2, Q4, the power amplification circuit of resistance R21, R22 composition; send into reverse impulse to 1,2 ends of magnetic latching relay K3 and drive signal; magnetic latching relay K3 state is made to invert; main contacts disconnects, and protects main circuit；Voltage detecting sample circuit inputs single-chip microcomputer U2, single-chip microcomputer U2 detection real-time to line voltage power supply signal, when detecting that voltage is within normal range, single-chip microcomputer U2 sends pulse adhesive instruction to drive circuit of magnetic latching relay；Drive circuit of magnetic latching relay drives the pull-in winding of magnetic latching relay, completes to close a floodgate, powering load；If because of electric network source fault cause overtension or too low and exceed setting after, then start-up study, after delay arrival time, then sent the instruction of pulse separating brake by single-chip microcomputer U2, drive magnetic latching relay switching winding through drive circuit of magnetic latching relay again, complete separating brake, stop powering to the load；After cut-out powers to the load, single-chip microcomputer U2 detects line voltage the most in real time, when line voltage recovers to normal value, single-chip microcomputer U2 starts runback time delay, to prevent voltage from recovering suddenly, power supply de-stabilising effect user power utilization during power supply, after delay arrival time, sent pulse adhesive instruction by single-chip microcomputer U2 to drive circuit of magnetic latching relay, complete the combined floodgate that automatically resets, recover powering load.
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| CN201410046164.8A CN103779831B (en) | 2014-02-10 | 2014-02-10 | SCM Based three-phase self-resetting type over voltage protector |
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| CN201410046164.8A CN103779831B (en) | 2014-02-10 | 2014-02-10 | SCM Based three-phase self-resetting type over voltage protector |
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| CN103779831B true CN103779831B (en) | 2016-11-23 |
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| CN106026013A (en) * | 2016-05-19 | 2016-10-12 | 安徽信邦塑业有限公司 | Protection circuit for storage battery charger |
| CN112821345A (en) * | 2021-01-25 | 2021-05-18 | 上海电器科学研究所（集团）有限公司 | Control device and control method for voltage fault protection |
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| CN203026906U (en) * | 2013-01-16 | 2013-06-26 | 黄锋勇 | Resettable over-voltage and under-voltage protector |
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| US8493012B2 (en) * | 2009-11-17 | 2013-07-23 | Eaton Corporation | Protection relay, electrical switching apparatus, and system for determining and outputting fault current available at a load and incident energy or personal protective equipment level operatively associated therewith |
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Denomination of invention: A three-phase self resetting overvoltage and undervoltage protector based on microcontroller Effective date of registration: 20231130 Granted publication date: 20161123 Pledgee: Xi'an Caijin Financing Guarantee Co.,Ltd. Pledgor: XI'AN A PU DUN ELECTRICITY TECHNOLOGY CO.,LTD. Registration number: Y2023980068866 |