CN104716736B - Control circuit of double-power-supply changeover device - Google Patents
Control circuit of double-power-supply changeover device Download PDFInfo
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- CN104716736B CN104716736B CN201510156941.9A CN201510156941A CN104716736B CN 104716736 B CN104716736 B CN 104716736B CN 201510156941 A CN201510156941 A CN 201510156941A CN 104716736 B CN104716736 B CN 104716736B
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Abstract
The invention discloses a control circuit of a double-power-supply changeover device. The control circuit is characterized in that when a frequently-used power supply is normal, a power supplying circuit of a reserve power supply is deenergized and does not work; an N phase of the frequently-used power supply and an N phase of the reserve power supply cannot be communicated at any time, so that the misoperation of a frontend residual current circuit-breaker caused by a current current-direction imbalance phenomenon resulting from the connection of voltage of two channels is avoided. A three-phase voltage detection circuit of the frequently-used power supply and a power supplying circuit of the power supply adopt capacitive step-down circuits to replace transformers; a gate circuit is adopted as a logic control circuit instead of a microcontroller. The control circuit mainly has the following advantages that the whole circuit is simple, scientific and ingenious in structure, high in reliability, good in EMC (Electro-Magnetic Compatibility) and low in power consumption; the economical efficiency is high, the cost performance is high, the manufacturing is easy, the maintenance is convenient, the maintenance cost is low, and the control circuit is energy-saving and environment-friendly, thereby having relatively great popularization value.
Description
Technical field
The present invention relates to dual-power transfer switch appliance field, particularly to a kind of electronics of dual-power transfer switch electrical equipment
Control circuit.
Background technology
The important events of some low-voltage distributions, for reducing the economic loss causing because of power failure, are powered using two road power supplys:
Conventional, standby or standby each other, this two roads power supply can be all that electrical network is powered, and Ye Ke mono- tunnel powers for electrical network, and a road is diesel oil
Generator powered.When in power supply process, barrier is unable to normal power supply to a road power supply for some reason, its load is switched to another road
The device of power supply is referred to as dual-power transfer switch electrical equipment, abbreviation tse, is intended to referred to as double-power supply switching device, its load is cut automatically
The device changing to another road power supply is referred to as automatic transfer switching electric appliance, abbreviation atse.
At present, atse is typically made up of automatic change-over body and control circuit two parts, is used primarily in and does not allow to stop
The important place of electricity.Automatic change-over body mainly by two choppers as master switch, prevent two breaker mechanicals
Interlocking mechanism and being made up of the machinery conversion mechanism that two-way reducing motor drives, control circuit is mainly core by microcontroller
Intelligent control circuit composition.When the conventional supply voltage that control circuit detects the current power supply of load occurs more than permission
During deviation, atse automatically switches to another stand-by power supply and powers it is ensured that load supplying is unlikely to interrupt for a long time；When conventional
When power up is normal, atse can automatically switch back into conventional power supply and power it is also possible to continue to continue power supply by current stand-by power supply,
Proper time is manual again or remote control switches back into conventional power supply and powers.
Atse with intelligent control circuit is commonly referred to as intelligent duplicate power supply conversion equipment, its master switch nominal operation
, typically in more than 100a device for switching, its price is also of a relatively high for electric current, is commonly used in the larger unit of ratio, such as hospital, airport
Etc. occasion.But the occasion in some small ranges, the place such as market as little in some, little company, in its unit interval, power consumption is relative
Less, as long as with the higher small-sized economical double-power supply switching device of cost performance, such as master switch rated operational current
For the miniature circuit breaker in the range of 16a ~ 100a, also not high to the monitoring requirement of supply voltage, general only need to monitor conventional
The voltage failures such as the phase shortage of power supply.
Intelligent duplicate power supply conversion equipment control circuit is complicated, and manufacturing cost is high.As in control circuit at least provided with for whole
Individual circuit provides working power two-way power supply, passes through two mains transformer respectively by conventional power supply and stand-by power supply blood pressure lowering, stupid
The mains transformer volume of weight is big, takes up room big, heating is big, easily occurs burning phenomenon in airtight space.Monitoring two
The circuit of road power supply voltage, is typically used as decompression device by miniature transformer and drops to power-frequency voltage than relatively low in proportion
Safe voltage is input to control circuit voltage detecting end and carries out voltage monitoring.Typically two-way detecting voltage by three phase needs 6 are small-sized
Transformator, miniature transformer is inductive load, and because it exists, volume is big, takies the larger space of controller, is unfavorable for controlling
Device miniaturization processed；But also there is the defects such as miniature transformer harmonic wave is high, radiation height, high cost, power consumption are big, easily burn out.Again
As microcontroller, in the severe electric room environment of working condition, electromagnetic interference is serious, be easily damaged, easy malfunction, reliability phase
To poor, and need to program, development difficulty is big, difficult in maintenance.
Content of the invention
There is drawbacks described above in the control circuit for solving existing double-power supply switching device, the present invention provides a kind of structure simple
The control circuit of the high double-power supply switching device of science small power consumption, low cost, reliability.
For achieving the above object, the scheme that the present invention takes is:
A kind of control circuit of double-power supply switching device, it is included in the machinery conversion mechanism of double-power supply switching device
Reducing motor and normally closed travel switch, and for whole circuit provide working power Circuits System power circuit；Its feature
It is: conventional power supply detecting voltage by three phase circuit that it also includes being sequentially connected in series by tandem, photoelectric isolating circuit, patrol
Collect computing circuit, motor positive and inverse selection circuit, time delay conversion circuit；Time delay conversion circuit is connected in series with reducing motor；Its
In, time delay conversion circuit includes controlling conventional turn of standby delay circuit of reducing motor rotating forward standby with control reducing motor to invert
With turning conventional delay circuit, commonly use and turn the corresponding normally closed travel switch corresponding conventional power supply of connection of standby delay circuit, standby
Turn the corresponding normally closed travel switch of conventional delay circuit and connect corresponding stand-by power supply；Commonly use and turn standby delay circuit and standby turn
The working power of conventional delay circuit is controlled by motor positive and inverse selection circuit.
As the explanation of such scheme, when there is the decompression phenomenons such as phase shortage in conventional power supply, conventional power supply three-phase voltage inspection
Slowdown monitoring circuit sends abnormal signal, after photoelectric isolating circuit isolation processing, is sent to logical operation circuit and carries out logical operationss, root
Send abnormal control signal, the conversion of motor positive and inverse selection circuit off delay according to operation result to motor positive and inverse selection circuit
The conventional working power turning standby delay circuit in circuit, and working power is switched to standby turn in time delay conversion circuit
Conventional delay circuit, after suitable time-delay, reducing motor reversion end is connected with stand-by power supply, and reducing motor action, by conventional electricity
The chopper of source disconnects, and by the breaker closing of standby electricity source, load is powered by stand-by power supply.When conventional power up just
Chang Shi, conventional power supply detecting voltage by three phase circuit sends normal signal, after photoelectric isolating circuit isolation processing, is sent to logic
Computing circuit carries out logical operationss, is just sending normal control signal, motor according to operation result to motor positive and inverse selection circuit
The working power of standby turn of conventional delay circuit in reversion selection circuit off delay change-over circuit, and working power is switched
To conventional turn of standby delay circuit in time delay conversion circuit, after suitable time-delay, reducing motor is rotated forward end and is connect with conventional power supply
Logical, reducing motor action, the chopper of standby electricity source is disconnected, by the breaker closing of conventional mains side, load is by commonly using
Power supply is powered.
Further illustrating as such scheme, aforementioned circuit system power supply circuit includes power supply stabilization circuit and two-way simultaneously
The low-voltage power circuit of connection, low-voltage power circuit one tunnel is the common system power circuit being connected with conventional power supply, and another road is
With electricity after the back-up system power circuit being connected with stand-by power supply, common system power circuit and the parallel connection of back-up system power circuit
Source mu balanced circuit is connected；Common system power circuit by the conventional power capacitor reduction voltage circuit being sequentially connected in series in order,
Conventional power rectifier circuit and conventional power isolation circuit composition；Back-up system power circuit is by being sequentially connected in series in order
Stand-by power supply capacity voltage dropping circuit, stand-by power supply rectification circuit and stand-by power supply isolation circuit composition.Power isolation circuit guarantees
When being out of order in any road of two-way power supply, do not interfere with the normal work on another road.
Preferably, aforementioned conventional power capacitor reduction voltage circuit and stand-by power supply capacity voltage dropping circuit are by non-polar condenser
And the discharge resistance composition in parallel with this non-polar condenser；Conventional power capacitor reduction voltage circuit and stand-by power supply capacitance decompression electricity
Road input all and is connected to varistor；Non-polar condenser is the cbb electric capacity of 240v ~ 1000v or safety electric capacity for pressure voltage；
Aforementioned conventional power rectifier circuit and stand-by power supply rectification circuit are full-wave rectification bridge；Aforementioned conventional power isolation circuit and standby
It is the diode that anode is connected with full-wave rectification bridge positive pole with power isolation circuit, the negative electrode of this two diodes is connected
It is connected to the input of power supply stabilization circuit after connecing.
The use of capacity voltage dropping circuit, efficiently solves the series of problems bringing using heavy transformator, due to electricity
Hold for capacitive load, its emc performance is good, in theory its not power consumption, power consumption becomes very low, and harmonic wave is little.Cbb electric capacity or safety
Electric capacity is cheap, and security performance is high.Its principle of capacity voltage dropping circuit actually utilizes capacitive reactance current limliting, its Current calculation formula
It is illustrated below.For example, it is being connected to the alternating voltage of 220v/50hz as control voltage, when capacitance c is 1uf, if
Using the available electric current of all wave rectification (meansigma methodss) it is: i (av)=0.89 × v/zc=0.89 × 220 × 2 × ∏ × f × c=
0.89×220×2×3.14×50×c=60000c =60000×0.000001=0.06a=60ma.Reasonable selection is nonpolarity electricity
The capacity of container, circuit gets final product normal work.
Further illustrating as such scheme, aforementioned power source mu balanced circuit is made up of two-stage mu balanced circuit, and the first order is steady
Volt circuit is mainly made up of the stabilivolt of resistance and 12v, and the second level is that the main integrated regulator by voltage stabilizing value for 5v forms；
First order mu balanced circuit is connected with the diode in conventional power isolation circuit and stand-by power supply isolation circuit, and its junction sets
There is filter capacitor；The outfan of second level mu balanced circuit also is provided with filter capacitor.First order mu balanced circuit is the work making relay
Make power supply, second level mu balanced circuit is standard 5v power supply.
Further illustrating as such scheme, aforementioned conventional power supply detecting voltage by three phase circuit includes its input respectively
Be connected to each the conventional power supply a phase voltage detection circuit of corresponding conventional power supply three-phase, conventional power supply b phase voltage detection circuit and
Conventional power supply c phase voltage detection circuit；Aforementioned Photon-Electron isolation circuit includes a phase Phototube Coupling electricity being made up of photoelectrical coupler
Road, b phase photoelectric isolating circuit and c phase photoelectric isolating circuit, the c pole of each photoelectrical coupler connects pull-up resistor to aforementioned voltage stabilizing collection
Become the outfan of circuit；The a phase capacity voltage dropping circuit that conventional power supply a phase voltage detection circuit includes being sequentially connected in series, a commutating phase are steady
Volt circuit；Conventional power supply b phase voltage detection circuit includes b phase capacity voltage dropping circuit, the b commutating phase mu balanced circuit being sequentially connected in series；
Conventional power supply c phase voltage detection circuit includes c phase capacity voltage dropping circuit, the c commutating phase mu balanced circuit being sequentially connected in series；Conventional power supply
A phase voltage detection circuit passes through a phase photoelectric isolating circuit, conventional power supply b phase voltage detection circuit passes through b phase Phototube Coupling electricity
Road, conventional power supply c phase voltage detection circuit are each connected respectively to the input of logical operation circuit by c phase photoelectric isolating circuit
End.
As long as there being conventional power supply to have a phase voltage, photoelectric isolating circuit just cannot get normal signal and sends abnormal letter
Number, logical operation circuit can enter row operation to gained signal.Capacity voltage dropping circuit is used as potential circuit, because electric capacity is
Idle device, does not consume active power during work, does not generate heat yet, and transformator relatively is safer, small volume, and pin is few, easily pacifies
Dress, also more saves controller space, meanwhile, cost is also less expensive, is conducive to energy-conserving and environment-protective.
Preferably, aforementioned a phase capacity voltage dropping circuit, b phase capacity voltage dropping circuit and c phase capacity voltage dropping circuit are by being resistant to work
The non-polar condenser of frequency high pressure and the discharge resistance in parallel with this non-polar condenser composition；The capacity voltage dropping circuit of each phase is defeated
Enter and hold and be connected to varistor；Non-polar condenser is the cbb electric capacity of 240v ~ 1000v or safety electric capacity for pressure voltage；A phase is whole
Stream mu balanced circuit, b commutating phase mu balanced circuit and c commutating phase mu balanced circuit all include full-wave rectification bridge, Zener diode；All-wave is whole
It is provided with current-limiting resistance, full-wave rectification bridge outfan is additionally provided with filter capacitor, and each is steady between stream bridge outfan and Zener diode
The input that the outfan of pressure diode is corresponding with the photoelectrical coupler in photoelectric isolating circuit connects.Capacity voltage dropping circuit
Use, efficiently solve the series of problems bringing using transformator, make that the volume of circuit is less, power consumption is less, capacitor valency
Lattice village is cost-effective to inexpensively, being conducive to.
Preferably, aforementioned logic computing circuit mainly by the phase inverter with Schmidt trigger for three tunnels and with this phase inverter string
The diode composition of connection, the outfan of three diodes is connected with an output phase inverter after being connected in parallel again, and this output is anti-
Phase device is as logic operation result outfan；The input of each phase inverter each corresponds to and a phase photoelectric isolating circuit, b respectively
The e of the one of photoelectrical coupler in phase photoelectric isolating circuit, c phase photoelectric isolating circuit is extremely connected, each phase inverter defeated
Enter end and be provided with the filter capacitor being connected with the negative pole of Circuits System power circuit, both ends of filter capacitor is parallel with fixed resistance or electricity
Position device.
When conventional power supply is normal, what all of phase inverter obtained is high level signal, now phase inverter output low level, two
Pole pipe is not turned on, when there are decompression, the abnormal conditions such as under-voltage in the arbitrary phase voltage of conventional power supply, the high electricity of corresponding phase inverter output
Flat, corresponding diode current flow, it is connected with a phase inverter after being connected in parallel due to the outfan of three diodes, structure again
Become logical "or" relation, logical operation circuit exports high level signal.The NAND gate circuit of Schmidt trigger is because being provided with voltage
Fluctuation window, can effectively prevent the short-time fluctuations of conventional supply voltage from causing reducing motor frequent switching, the confession to load for the impact
Electricity.
Preferably, aforementioned motor rotating selection circuit includes the rotating choosing with one group of normally open contact and normally closed interlock
Select relay；Rotating selective relay common port is connected to the input of aforementioned integrated regulator, and rotating selects relay
The normally open contact of device is connected to conventional turn of standby delay circuit, and the normally closed interlock of rotating selective relay is often connected to standby turn
Use delay circuit；Rotating selective relay is driven by a npn audion, and resistance and logic are passed through in the b pole of this audion
The outfan of the output phase inverter of computing circuit is connected.Rotating selective relay guarantees the conventional standby delay circuit and standby of turning
Turn conventional delay circuit only one of which and be in live line work state.
Preferably, an aforementioned conventional turn standby delay circuit includes the conventional relay with two groups of normally open contacts and normally closed interlock
Device, and the phase inverter of two series connection, the input of previous phase inverter is provided with potentiometer and the time delay of capacitances in series composition is filled
Discharge circuit, the input of potentiometer is extremely connected with the b of the audion in motor positive and inverse selection circuit, potentiometer and electric capacity string
It is provided with a repid discharge diode and the outfan of output phase inverter of logical operation circuit between at connection point；Conventional relay
First group of normally open contact be connected to the n phase of conventional power supply, first group of normally closed interlock of conventional relay is connected to stand-by power supply
N phase, first group of common port of conventional relay be connected with the common port of reducing motor；Second group of conventional relay normally opened tactile
Head is connected to a phase, second group of common port of conventional relay and the reducing motor of conventional power supply by a normally closed travel switch
Rotating forward end connect；Conventional relay is driven by a npn audion, and resistance is passed through with latter one instead in the b pole of this audion
The outfan of phase device is connected；Coil one end of conventional relay is connected with the normally open contact of rotating selective relay, the other end
Extremely it is connected with the c of the npn audion driving conventional relay；Aforementioned standby turn of conventional delay circuit includes normally opened with one group
Contact and the duplicate relay of normally closed interlock, and the standby time delay logic electricity that two-stage is respectively made up of the phase inverter of two series connection
Road, the input of the standby relay logic of previous stage is connected with the normally closed interlock of rotating selective relay by resistance, front
The input of the standby relay logic of one-level is further connected with the Zener diode of a 5.1v, the standby relay logic of rear stage
Input be provided with potentiometer and capacitances in series composition time delay charge-discharge circuit, the input of potentiometer is standby with previous stage to be prolonged
When logic circuit outfan be connected, anti-with the outfan of the standby relay logic of previous stage at potentiometer and capacitances in series point
It is provided with a repid discharge diode between the outfan of phase device；The normally open contact of duplicate relay and the reversion end of reducing motor
Connect, the common port of duplicate relay is connected to a phase of stand-by power supply by a normally closed travel switch；Duplicate relay is by one
Individual npn audion drives, and the outfan phase inverter of resistance and the standby relay logic of rear stage is passed through in the b pole of this audion
Outfan be connected；Coil one end of duplicate relay is connected with the normally closed interlock of rotating selective relay, the other end and drive
The c of the npn audion of dynamic duplicate relay is extremely connected.
Standby relay logic in standby turn of conventional delay circuit arranges the phase inverter by two series connection for the two-stage, purpose
It is to keep preferable concordance with the conventional delay time turning standby delay circuit.During rotating selective relay closure, will often
Coil and 12v power on relay；When rotating selective relay disconnects, by the coil of duplicate relay and 12v electricity
Source is connected；It is not in situation about being closed at that rotating selective relay controls conventional relay and duplicate relay closure.
When rotating selective relay closure, conventional relay closure, reducing motor is connected with conventional power supply current supply circuit, reducing motor
Obtain electric rotating forward, the chopper of standby electricity source is disconnected, by the breaker closing of conventional mains side, load is supplied by conventional power supply
Electricity；When rotating selective relay disconnects, duplicate relay closes, reducing motor is connected with stand-by power supply current supply circuit, slows down
Motor obtains electric reversion, and the chopper of conventional mains side is disconnected, and by the breaker closing of standby electricity source, load is by stand-by power supply
Power supply.
Aforementioned control circuit also includes whether being in the state instruction electricity of "on" position as the chopper of instruction master switch
Road, condition indication circuit is connected with conventional power supply and stand-by power supply respectively by normally opened travel switch.
From the foregoing, it will be observed that the present invention mainly has the advantage that whole circuit structure is simple, science is ingenious, reliability is high, emc
Performance is good, small power consumption；Not only good economy performance, cost performance are high, and easy to manufacture, maintenance is also convenient for, and maintenance cost is low, energy-conserving and environment-protective,
There is larger promotional value.
Brief description
Fig. 1 is the schematic block circuit diagram of the present invention.
Fig. 2 is conventional power supply detecting voltage by three phase schematic block circuit diagram.
Fig. 3 is the theory diagram of Circuits System power circuit.
Fig. 4 is Fig. 3 circuit theory diagrams.
Fig. 5 commonly uses the circuit theory diagrams of power supply detecting voltage by three phase circuit and logical operation circuit.
Fig. 6 is the circuit theory diagrams of time delay conversion circuit.
Fig. 7 is the circuit theory diagrams of condition indication circuit.
Main Reference label declaration: 11, reducing motor 13, conventional power supply detecting voltage by three phase circuit 131, a phase are electric
Pressure testing circuit 1311, a phase capacity voltage dropping circuit 1312, a commutating phase mu balanced circuit 1313, a phase photoelectric isolating circuit
132nd, power supply b phase voltage detection circuit 1321, b phase capacity voltage dropping circuit 1322, b commutating phase mu balanced circuit are commonly used
1323rd, b phase photoelectric isolating circuit 133, conventional power supply c phase voltage detection circuit 1331, c phase capacity voltage dropping circuit
1332nd, c commutating phase mu balanced circuit 1333, c phase photoelectric isolating circuit 14, photoelectric isolating circuit 15, motor positive and inverse choosing
Select circuit 16, conventional turn of standby delay circuit 17, standby turn of conventional delay circuit 18, Circuits System power circuit
181st, common system power circuit 182, back-up system power circuit 183, power supply stabilization circuit 19, logical operation circuit
20th, condition indication circuit.
Specific embodiment
Below in conjunction with the accompanying drawings and preferred embodiment, the present invention and its Advantageous Effects are carried out further specifically
Bright.
Referring to Fig. 1, the control circuit of double-power supply switching device includes the machinery conversion mechanism located at double-power supply switching device
In reducing motor 11 and normally closed travel switch (sa1, sa2), and for whole circuit provide working power Circuits System electricity
Source circuit 18；It is characterized in that: it also includes the conventional power supply detecting voltage by three phase circuit being sequentially connected in series by tandem
13rd, photoelectric isolating circuit 14, logical operation circuit 19, motor positive and inverse selection circuit 15, time delay conversion circuit；Time-delay conversion electricity
Road is connected in series with reducing motor 11；Wherein, time delay conversion circuit includes controlling the conventional of reducing motor 11 rotating forward to turn standby prolonging
When circuit 16 and standby turn of conventional delay circuit 17 controlling reducing motor 11 reversion, commonly use that to turn standby delay circuit 16 corresponding
Normally closed travel switch sa1 connects corresponding conventional power supply, and the corresponding normally closed travel switch sa2 of standby turn of conventional delay circuit 17 is even
Connect corresponding stand-by power supply；The working power of conventional turn of standby delay circuit 16 and standby turn of conventional delay circuit 17 is by motor just
Reversion selection circuit 15 controls.
Referring to Fig. 3, Circuits System power circuit 18 includes the low-tension supply electricity of power supply stabilization circuit 183 and two-way parallel connection
Road, low-voltage power circuit one tunnel is the common system power circuit 181 being connected with conventional power supply, and another road is with stand-by power supply even
With power supply after the back-up system power circuit 182 connecing, common system power circuit 181 and back-up system power circuit 182 parallel connection
Mu balanced circuit 183 is connected；Common system power circuit 181 is by the conventional power capacitor blood pressure lowering electricity being sequentially connected in series in order
Road, conventional power rectifier circuit and conventional power isolation circuit composition；Back-up system power circuit 182 is by being sequentially connected in series in order
Stand-by power supply capacity voltage dropping circuit, stand-by power supply rectification circuit and the stand-by power supply isolation circuit composition connecting.
Referring to Fig. 4, conventional power capacitor reduction voltage circuit and stand-by power supply capacity voltage dropping circuit are by non-polar condenser
(c7, c8) and the discharge resistance (r10, r11) in parallel with this non-polar condenser (c7, c8) form；Conventional power capacitor blood pressure lowering
Circuit and stand-by power supply capacity voltage dropping circuit input all and are connected to varistor (rt4, rt5)；Non-polar condenser (c7, c8)
For the cbb electric capacity for 240v ~ 1000v for the pressure voltage or safety electric capacity；Conventional power rectifier circuit and stand-by power supply rectification circuit are equal
For full-wave rectification bridge (dg4, dg5)；Conventional power isolation circuit and stand-by power supply isolation circuit are anode and full-wave rectification bridge
The diode (d9, d10) that positive pole connects, the negative electrode of this two diodes (d9, d10) is connected to power supply voltage stabilizing after being connected
The input of circuit 183.
Referring to Fig. 4, power supply stabilization circuit 183 is made up of two-stage mu balanced circuit, and first order mu balanced circuit is mainly by resistance r12
With the stabilivolt vd4 composition of 12v, the second level is that the main integrated regulator u4 by voltage stabilizing value for 5v forms；First order voltage stabilizing
Circuit is connected with the diode (d9, d10) in conventional power isolation circuit and stand-by power supply isolation circuit, and its junction is provided with
Filter capacitor c14；The outfan of second level mu balanced circuit also is provided with filter capacitor (c13, c9).
Referring to Fig. 2, conventional power supply detecting voltage by three phase circuit 13 includes its input and is connected respectively to each corresponding commonly using
The conventional power supply a phase voltage detection circuit 131 of power supply three-phase, conventional power supply b phase voltage detection circuit 132 and conventional power supply c phase
Voltage detecting circuit 133；Photoelectric isolating circuit 14 includes a phase photoelectric isolating circuit 1313, the b phase being made up of photoelectrical coupler u1
Photoelectric isolating circuit 1323 and c phase photoelectric isolating circuit 1333, the c pole of each photoelectrical coupler connects pull-up resistor (r5, r6, r9)
Outfan to integrated regulator u4；Conventional power supply a phase voltage detection circuit 131 includes a phase capacitance decompression being sequentially connected in series
Circuit 1311, a commutating phase mu balanced circuit 1312；Conventional power supply b phase voltage detection circuit 132 includes the b phase electric capacity being sequentially connected in series
Reduction voltage circuit 1321, b commutating phase mu balanced circuit 1322；Conventional power supply c phase voltage detection circuit 133 includes the c phase being sequentially connected in series
Capacity voltage dropping circuit 1331, c commutating phase mu balanced circuit 1332；Conventional power supply a phase voltage detection circuit 131 pass through a phase photoelectricity every
Pass through b phase photoelectric isolating circuit 1323, conventional power supply c phase voltage from circuit 1313, conventional power supply b phase voltage detection circuit 132
Testing circuit 133 is each connected respectively to the input of logical operation circuit 19 by c phase photoelectric isolating circuit 1333.
Referring to Fig. 5, a phase capacity voltage dropping circuit 1311, b phase capacity voltage dropping circuit 1321 and c phase capacity voltage dropping circuit 1331
By the non-polar condenser (c1, c2, c3) being resistant to power frequency high voltage and with this non-polar condenser (c1, c2, c3) in parallel putting
Resistance (r1, r2, r3) forms；The capacity voltage dropping circuit input of each phase is simultaneously connected to varistor (rt1, rt 2, rt 3)；No
Polar capacitor (c1, c2, c3) is the cbb electric capacity of 240v ~ 1000v or safety electric capacity for pressure voltage；A commutating phase mu balanced circuit
1312nd, b commutating phase mu balanced circuit 1322 and c commutating phase mu balanced circuit 1332 all include full-wave rectification bridge (dg1, dg2, dg3), steady
Pressure diode (vd1, vd2, vd 3)；Full-wave rectification bridge (dg1, dg2, dg3) outfan and Zener diode (vd1, vd2, vd
3) be provided with current-limiting resistance (r4, r7, r8) between, full-wave rectification bridge (dg1, dg2, dg3) outfan be additionally provided with filter capacitor (c10,
C1, c12), the photoelectrical coupler u1 in the outfan and photoelectric isolating circuit 14 of each Zener diode (vd1, vd2, vd 3)
Corresponding input connects.
Referring to Fig. 5, logical operation circuit 19 main by the phase inverter with Schmidt trigger for three tunnels (u21, u22, u23) and
Diode (d6, the d7, d8) composition connected with this phase inverter (u21, u22, u23), the output of three diodes (d6, d7, d8)
End is connected with an output phase inverter u24 after being connected in parallel again, and this output phase inverter u24 exports as logic operation result
End；The input of each phase inverter (u21, u22, u23) each respectively correspond to a phase photoelectric isolating circuit 1313, b phase photoelectricity every
The e of the one of photoelectrical coupler in circuit 1323, c phase photoelectric isolating circuit 1333 is extremely connected, each phase inverter (u21,
U22, u23) input be provided with the filter capacitor (c4, c5, c6) being connected with the negative pole of Circuits System power circuit 18, filtered electrical
Hold (c4, c5, c6) two ends and be parallel with fixed resistance or potentiometer (pr1, pr2, pr3).
Referring to Fig. 6, motor positive and inverse selection circuit 15 includes the rotating choosing with one group of normally open contact and normally closed interlock
Select relay ka1；Rotating selective relay ka1 common port is connected to the input of integrated regulator u4, and rotating selects
The normally open contact of relay ka1 is connected to conventional turn of standby delay circuit 16, and the normally closed interlock of rotating selective relay ka1 is even
It is connected to standby turn of conventional delay circuit 17；Rotating selective relay ka1 is driven by a npn audion q1, this audion
The b pole of q1 is connected with the outfan of the output phase inverter u24 of logical operation circuit 19 by resistance.
Referring to Fig. 6, a conventional turn standby delay circuit 16 includes the conventional relay with two groups of normally open contacts and normally closed interlock
Device ka3, and the phase inverter (u32, u33) of two series connection, the input of previous phase inverter u32 is provided with potentiometer pr5 and electricity
Hold the time delay charge-discharge circuit that c16 is composed in series, three poles in the input of potentiometer pr5 and motor positive and inverse selection circuit 15
The b of pipe q1 is extremely connected, the output with the output phase inverter u24 of logical operation circuit 19 at potentiometer pr5 and electric capacity c16 series connection point
It is provided with a repid discharge diode d12 between end；First group of normally open contact of conventional relay ka3 is connected to conventional power supply
N phase, first group of normally closed interlock of conventional relay ka3 is connected to the n phase of stand-by power supply, and first group of conventional relay ka3 public
End is connected with the common port of reducing motor 11 altogether；Second group of normally open contact of conventional relay ka3 is opened by a normally closed stroke
Close a phase that sa1 is connected to conventional power supply, second group of common port of conventional relay ka3 is connected with the rotating forward end of reducing motor 11；
Conventional relay ka3 is driven by a npn audion q3, and resistance r15 and a rear phase inverter are passed through in the b pole of this audion q3
The outfan of u33 is connected；Coil one end of conventional relay ka3 is connected with the normally open contact of rotating selective relay ka1, separately
One end is extremely connected with the c of the npn audion q3 driving conventional relay ka3；Standby turn of conventional delay circuit 17 includes carrying
One group of normally open contact and the duplicate relay ka2 of normally closed interlock, and two-stage respectively by two series connection phase inverters (u25, u26,
U31, u34) the standby relay logic that forms, the input of the standby relay logic of previous stage pass through resistance r13 with just
The normally closed interlock of reversion selective relay ka1 is connected, and the input of the standby relay logic of previous stage is further connected with a 5.1v
Zener diode vd5, the input of the standby relay logic of rear stage is provided with potentiometer pr4 and electric capacity c15 and is composed in series
Time delay charge-discharge circuit, the input of potentiometer pr4 is connected with the outfan of the standby relay logic of previous stage, potentiometer
It is provided with and the outfan of outfan phase inverter u26 of the standby relay logic of previous stage between at pr4 and electric capacity c15 series connection point
One repid discharge diode d13；The normally open contact of duplicate relay ka2 is connected with the reversion end of reducing motor 11, standby continues
The common port of electrical equipment ka2 is connected to a phase of stand-by power supply by a normally closed travel switch sa2；Duplicate relay ka2 is by one
Npn audion q2 drives, and the outfan of resistance r20 and the standby relay logic of rear stage is passed through in the b pole of this audion q2
The outfan of phase inverter (u31, u34) is connected；Coil one end of duplicate relay ka2 is normal with rotating selective relay ka1's
Close that contact is connected, the other end is extremely connected with the c of npn audion q2 driving duplicate relay ka2.
Referring to Fig. 7, the state that control circuit also includes whether being in "on" position as the chopper of instruction master switch refers to
Show circuit 20, condition indication circuit 20 is connected with conventional power supply and stand-by power supply respectively by normally opened travel switch (sb1, sb2).
Book and specific embodiment do not constitute any restriction to the present invention according to the above description, the invention is not limited in
The specific embodiment that face is disclosed and described, some modifications to the present invention and deformation are it should also the right falling into the present invention will
In the protection domain asked.
Claims (6)
1. a kind of control circuit of double-power supply switching device, it is included in the machinery conversion mechanism of double-power supply switching device
Reducing motor and normally closed travel switch, and the Circuits System power circuit of working power is provided for whole circuit；It also includes
The conventional power supply detecting voltage by three phase circuit that is sequentially connected in series by tandem, photoelectric isolating circuit, logical operation circuit, electricity
Machine rotating selection circuit, time delay conversion circuit；Time delay conversion circuit is connected in series with reducing motor；Wherein, time-delay conversion electricity
Road includes the conventional standby turn of conventional time delay turning standby delay circuit and controlling reducing motor reversion controlling reducing motor to rotate forward
Circuit, commonly uses and turns the corresponding normally closed travel switch corresponding conventional power supply of connection of standby delay circuit, standby turn of conventional time delay electricity
The corresponding normally closed travel switch in road connects corresponding stand-by power supply；Conventional turn of standby delay circuit and standby turn of conventional delay circuit
Working power controlled by motor positive and inverse selection circuit；Circuits System power circuit includes power supply stabilization circuit and two-way is in parallel
Low-voltage power circuit, low-voltage power circuit one tunnel is the common system power circuit being connected with conventional power supply, another road be with
With power supply after the back-up system power circuit that stand-by power supply connects, common system power circuit and the parallel connection of back-up system power circuit
Mu balanced circuit is connected；Common system power circuit by the conventional power capacitor reduction voltage circuit being sequentially connected in series in order, often
With power rectifier circuit and conventional power isolation circuit composition；Back-up system power circuit is standby by be sequentially connected in series in order
With power supply capacity voltage dropping circuit, stand-by power supply rectification circuit and stand-by power supply isolation circuit composition；Conventional power capacitor blood pressure lowering electricity
Road and stand-by power supply capacity voltage dropping circuit are formed by non-polar condenser and the discharge resistance in parallel with this non-polar condenser；
Conventional power capacitor reduction voltage circuit and stand-by power supply capacity voltage dropping circuit input all and are connected to varistor；Non-polar condenser
For the cbb electric capacity for 240v ~ 1000v for the pressure voltage or safety electric capacity；Described conventional power rectifier circuit and stand-by power supply rectified current
Road is full-wave rectification bridge；Described conventional power isolation circuit and stand-by power supply isolation circuit with full-wave rectification bridge are just being anode
The diode that pole connects, the negative electrode of this two diodes is connected to the input of power supply stabilization circuit after being connected；Power supply
Mu balanced circuit is made up of two-stage mu balanced circuit, and first order mu balanced circuit is mainly made up of the stabilivolt of resistance and 12v, and the second level is
The main integrated regulator by voltage stabilizing value for 5v forms；First order mu balanced circuit and conventional power isolation circuit and stand-by power supply
Diode in isolation circuit is connected, and its junction is provided with filter capacitor；The outfan of second level mu balanced circuit also is provided with filtering
Ripple electric capacity；It is characterized in that: described conventional power supply detecting voltage by three phase circuit include its input be connected respectively to each corresponding often
With the conventional power supply a phase voltage detection circuit of power supply three-phase, conventional power supply b phase voltage detection circuit and conventional power supply c phase voltage
Testing circuit；Described photoelectric isolating circuit includes a phase photoelectric isolating circuit, the b phase Phototube Coupling electricity being made up of photoelectrical coupler
Road and c phase photoelectric isolating circuit, the c pole of each photoelectrical coupler connects pull-up resistor to the outfan of aforementioned integrated regulator；
Conventional power supply a phase voltage detection circuit includes a phase capacity voltage dropping circuit, a commutating phase mu balanced circuit being sequentially connected in series；Conventional power supply
B phase voltage detection circuit includes b phase capacity voltage dropping circuit, the b commutating phase mu balanced circuit being sequentially connected in series；Conventional power supply c phase voltage
Testing circuit includes c phase capacity voltage dropping circuit, the c commutating phase mu balanced circuit being sequentially connected in series；Conventional power supply a phase voltage detection circuit
Electric by b phase photoelectric isolating circuit, conventional power supply c phase by a phase photoelectric isolating circuit, conventional power supply b phase voltage detection circuit
Pressure testing circuit is each connected respectively to the input of logical operation circuit by c phase photoelectric isolating circuit.
2. the control circuit of double-power supply switching device as claimed in claim 1, is characterized in that: described a phase capacity voltage dropping circuit,
B phase capacity voltage dropping circuit and c phase capacity voltage dropping circuit by the non-polar condenser being resistant to power frequency high voltage and with this nonpolarity electricity
Container discharge resistance composition in parallel；The capacity voltage dropping circuit input of each phase is simultaneously connected to varistor；Non-polar condenser is
Pressure voltage is cbb electric capacity or the safety electric capacity of 240v ~ 1000v；A commutating phase mu balanced circuit, b commutating phase mu balanced circuit are whole with c phase
Stream mu balanced circuit all includes full-wave rectification bridge, Zener diode；It is provided with limit between full-wave rectification bridge outfan and Zener diode
Leakage resistance, full-wave rectification bridge outfan is additionally provided with filter capacitor, in the outfan of each Zener diode and photoelectric isolating circuit
The corresponding input of photoelectrical coupler connect.
3. the control circuit of double-power supply switching device as claimed in claim 2, is characterized in that: described logical operation circuit is main
It is made up of the phase inverter with Schmidt trigger for three tunnels and the diode with this inverter series, the outfan of three diodes is simultaneously
It is connected with an output phase inverter after being linked togather, this output phase inverter is as logic operation result outfan again；Each is anti-phase
The input of device each respectively correspond to a phase photoelectric isolating circuit, b phase photoelectric isolating circuit, c phase photoelectric isolating circuit in its
In a photoelectrical coupler e extremely connected, the input of each phase inverter is provided with and is connected with the negative pole of Circuits System power circuit
Filter capacitor, both ends of filter capacitor is parallel with fixed resistance or potentiometer.
4. the control circuit of double-power supply switching device as claimed in claim 3, is characterized in that: described motor positive and inverse selects electricity
Road includes the rotating selective relay with one group of normally open contact and normally closed interlock；Rotating selective relay common port connects
To the input of aforementioned integrated regulator, the normally open contact of rotating selective relay is connected to commonly uses a turn standby time delay electricity
Road, the normally closed interlock of rotating selective relay is connected to standby turn of conventional delay circuit；Rotating selective relay is by one
Npn audion drives, and the b pole of this audion is passed through resistance and is connected with the outfan of the output phase inverter of logical operation circuit.
5. the control circuit of double-power supply switching device as claimed in claim 4, is characterized in that: described conventional turn of standby time delay electricity
Road includes the conventional relay with two groups of normally open contacts and normally closed interlock, and the phase inverter of two series connection, previous anti-phase
The input of device is provided with potentiometer and time delay charge-discharge circuit, the input of potentiometer and the motor positive and inverse of capacitances in series composition
The b of the audion in selection circuit is extremely connected, with the output phase inverter of logical operation circuit at potentiometer and capacitances in series point
It is provided with a repid discharge diode between outfan；First group of normally open contact of conventional relay is connected to the n of conventional power supply
Phase, first group of normally closed interlock of conventional relay is connected to the n phase of stand-by power supply, first group of common port of conventional relay with subtract
The common port of speed motor connects；Second group of normally open contact of conventional relay is connected to conventional electricity by a normally closed travel switch
The a phase in source, second group of common port of conventional relay is connected with the rotating forward end of reducing motor；Conventional relay is by a npn
Audion drives, and the b pole of this audion is connected with the outfan of a rear phase inverter by resistance；The coil one of conventional relay
End be connected with the normally open contact of rotating selective relay, the other end with drive commonly use relay npn audion c pole phase
Even；Described standby turn of conventional delay circuit includes the duplicate relay with one group of normally open contact and normally closed interlock, and two-stage
The standby relay logic that each phase inverter by two series connection forms, the input of the standby relay logic of previous stage passes through
Resistance is connected with the normally closed interlock of rotating selective relay, and the input of the standby relay logic of previous stage is further connected with one
The Zener diode of 5.1v, the input of the standby relay logic of rear stage is provided with potentiometer and the time delay of capacitances in series composition
Charge-discharge circuit, the input of potentiometer is connected with the outfan of the standby relay logic of previous stage, potentiometer and electric capacity string
It is provided with repid discharge two pole and the outfan of outfan phase inverter of the standby relay logic of previous stage between at connection point
Pipe；The normally open contact of duplicate relay is connected with the reversion end of reducing motor, and the common port of duplicate relay is normally closed by one
Travel switch is connected to a phase of stand-by power supply；Duplicate relay is driven by a npn audion, and the b pole of this audion is passed through
Resistance is connected with the outfan of the outfan phase inverter of the standby relay logic of rear stage；Coil one end of duplicate relay with
The normally closed interlock of rotating selective relay is connected, the other end is extremely connected with the c of the npn audion driving duplicate relay.
6. the control circuit of double-power supply switching device as claimed in claim 5, is characterized in that: described control circuit also includes making
Whether the chopper for indicating master switch is in the condition indication circuit of "on" position, and condition indication circuit is opened by normally opened stroke
Close and be connected with conventional power supply and stand-by power supply respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156941.9A CN104716736B (en) | 2015-04-04 | 2015-04-04 | Control circuit of double-power-supply changeover device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156941.9A CN104716736B (en) | 2015-04-04 | 2015-04-04 | Control circuit of double-power-supply changeover device |
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| Publication Number | Publication Date |
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| CN104716736A CN104716736A (en) | 2015-06-17 |
| CN104716736B true CN104716736B (en) | 2017-01-18 |
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| CN201510156941.9A Expired - Fee Related CN104716736B (en) | 2015-04-04 | 2015-04-04 | Control circuit of double-power-supply changeover device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253271B (en) * | 2016-08-19 | 2019-02-01 | 天津市百利电气有限公司 | Automatic change-over with the power control circuit that supplies power with double circuit |
| CN107645205B (en) * | 2017-10-20 | 2024-06-28 | 德力西电气有限公司 | Dual-power change-over switch control circuit |
| CN112072782B (en) * | 2020-09-03 | 2022-03-22 | 福建永强力加动力设备有限公司 | Generator time delay control circuit based on UPS |
| CN113658815B (en) * | 2021-08-06 | 2023-10-13 | 江苏威腾配电有限公司 | Interlocking control circuit for three-phase-sequence phase-change switch |
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| CN201119051Y (en) * | 2007-08-23 | 2008-09-17 | 梁雯洁 | A capacitor voltage reduction LED lighting circuit |
| CN201298749Y (en) * | 2008-10-08 | 2009-08-26 | 深圳市宝安任达电器实业有限公司 | Automatic transfer switching electrical appliance with double phase-correction power sources |
| CN102332749A (en) * | 2010-12-31 | 2012-01-25 | 上海源致信息技术有限公司 | Control equipment and power supply management device and method thereof |
| CN103078394A (en) * | 2012-12-28 | 2013-05-01 | 安徽鑫龙电器股份有限公司 | Dual power supply automatic conversion controller |
| CN104240978A (en) * | 2014-09-29 | 2014-12-24 | 河北工业大学 | Automatic changeover device for three-output power source |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9490636B2 (en) * | 2010-12-08 | 2016-11-08 | Panasonic Intellectual Property Management Co., Ltd. | Power supply circuit, power supply method and power supply system |
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- 2015-04-04 CN CN201510156941.9A patent/CN104716736B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201119051Y (en) * | 2007-08-23 | 2008-09-17 | 梁雯洁 | A capacitor voltage reduction LED lighting circuit |
| CN201298749Y (en) * | 2008-10-08 | 2009-08-26 | 深圳市宝安任达电器实业有限公司 | Automatic transfer switching electrical appliance with double phase-correction power sources |
| CN102332749A (en) * | 2010-12-31 | 2012-01-25 | 上海源致信息技术有限公司 | Control equipment and power supply management device and method thereof |
| CN103078394A (en) * | 2012-12-28 | 2013-05-01 | 安徽鑫龙电器股份有限公司 | Dual power supply automatic conversion controller |
| CN104240978A (en) * | 2014-09-29 | 2014-12-24 | 河北工业大学 | Automatic changeover device for three-output power source |
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