CN107733073A - A kind of main secondary power switching circuit - Google Patents
A kind of main secondary power switching circuit Download PDFInfo
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- CN107733073A CN107733073A CN201711060610.0A CN201711060610A CN107733073A CN 107733073 A CN107733073 A CN 107733073A CN 201711060610 A CN201711060610 A CN 201711060610A CN 107733073 A CN107733073 A CN 107733073A
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- 239000000853 adhesive Substances 0.000 claims description 9
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Classifications
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/085—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current making use of a thermal sensor, e.g. thermistor, heated by the excess current
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Voltage And Current In General (AREA)
- Power Conversion In General (AREA)
Abstract
The invention discloses a kind of main secondary power switching circuit,The plate internal power circuit of setting can provide the operating voltage being adapted for switching execution circuit and governor circuit,So governor circuit can be controlled to switch driving chip,And pass through the setting of switch drive chip,The control of zero line controlling switch and live wire controlling switch can also be made more convenient,And simplify circuit,Master is accessed compared to an existing dpdt relay simultaneously,The zero line and live wire of stand-by power source,This programme zero line controlling switch exports main circuit zero line or stand-by circuit zero line,Live wire controlling switch exports main circuit live wire or stand-by circuit live wire,The remote of power line can be realized,And live wire controlling switch only controls master,The break-make of the live wire of stand-by power source,Zero line controlling switch only controls master,The break-make of the zero line of stand-by power source,So relay it also avoid electric arc generation.
Description
Technical field
Power supply switch circuit of the present invention, specially a kind of main secondary power switching circuit.
Background technology
Existing power supply switch circuit uses No. four relays using every road power supply, and wherein two-way is normally opened, separately
Outer two-way is respectively connected to zero line and live wire, and so when relay adhesive, two armature are attracted to zero line respectively from normally open position
And zero line, power on circuitry can be thus realized, but the zero line of this circuit and live wire position are very close, in relay
The moment that electric shock contact is powered during adhesive easily produces electric arc, is so easy for burning out whole circuit, causes device damage, even
Cause heavy losses.
The content of the invention
To be located away from avoiding in view of the deficienciess of the prior art, it is an object of the invention to provide a kind of zero line and live wire
The execution circuit of main secondary power switching circuit caused by electric arc, to solve the problems mentioned in the above background technology.
To achieve the above object, a kind of main secondary power switching circuit, including governor circuit, plate internal power circuit and switching are held
Row circuit, the plate internal power circuit also couple with switching execution circuit coupling, the plate internal power circuit with governor circuit, institute
State plate internal power circuit and provide working power to governor circuit and switching execution circuit, the governor circuit is with switching execution circuit
Coupling, to send switching signal, the switching execution circuit receives switching signal and switching action, the switching execution circuit bag
Power selection circuit and switch drive chip are included, the power selection circuit couples with switch drive chip, the switch drive
Chip and governor circuit couple, to receive the switching signal of governor circuit output, the power selection circuit also with main power source and
Stand-by power source is coupled, and the power selection circuit includes zero line controlling switch K1 and live wire controlling switch K2, and the zero line control is opened
Close K1 to couple with the zero line of main power source and stand-by power source, the live wire controlling switch K2 switches and main power source and the live wire coupling of stand-by power source
Connecing, the zero line controlling switch K1 and live wire controlling switch K2 also couple with switch drive chip, and by switch drive chip
Control switching output main power source or stand-by power source.
As a further improvement on the present invention, the zero line controlling switch K1 and live wire controlling switch K2 is DPDT
Selective relay, it has the line of four inputs and two output ends, zero line controlling switch K1 and live wire controlling switch K2
Circle with switch drive chip couple, wherein zero line controlling switch K1 two of which input respectively with main power source and stand-by power source
Zero line connection, the equal sky of two other input connects, and when zero line controlling switch K1 is normally opened or during adhesive, zero line control
Switch K1 two output ends export main power source zero line and connect sky or connect empty and stand-by power source zero line；The live wire controlling switch K2
Live wire of the two of which input respectively with main power source and stand-by power source be connected, the equal sky of two other input connects, and when should
Live wire controlling switch K2 is normally opened or during adhesive, live wire controlling switch K2 two output ends output main power source live wire and connect it is empty or
Person connects empty and stand-by power source live wire.
As a further improvement on the present invention, the plate internal power circuit includes main power transformer and stand-by power source transformation
Device, the input of main power transformer and the stand-by power source transformer are connected with main power source and stand-by power source respectively, the main power source
The output end of transformer and stand-by power source transformer has been respectively coupled to main rectifier bridge and standby rectifier bridge, and the main rectifier bridge has been also coupled to
Mu balanced circuit, the standby rectifier bridge are coupled to mu balanced circuit, and the mu balanced circuit includes the first mu balanced circuit and the second voltage stabilizing electricity
Road, coupled with main rectifier bridge and standby rectifier bridge after the input short circuit of first mu balanced circuit and the second mu balanced circuit, it is described
First mu balanced circuit and the second mu balanced circuit 7 export the power supply of different voltage series, the main power transformer and stand-by power source
Protection circuit is also coupled between the input and main power source and stand-by power source of transformer, the protection circuit includes piezo-resistance
VR1, PTC resistor PTC1 and fuse FU1, the fuse FU1 one end couple with piezo-resistance VR1, the other end and main electricity
Source or stand-by power source connection, after one end couplings of the piezo-resistance VR1 with respect to the other end and the PTC resistor PTC1 of fuse with master
Power supply or stand-by power source coupling, the other ends of the PTC resistor PTC1 with respect to piezo-resistance VR1 and main power transformer or stand-by power source
The input coupling of transformer, node and main power transformer or stand-by power source between the fuse FU1 and piezo-resistance VR1
The input coupling of transformer.
As a further improvement on the present invention, the output end of main power transformer and the stand-by power source transformer also distinguishes coupling
Main sampling rectifier bridge and standby sampling rectifier bridge are connected to, the main sampling rectifier bridge has been also coupled to location circuit, described whole for sampling
Stream bridge is coupled to location circuit, and the location circuit exports power on signal, and the location circuit includes electric capacity parallel with one another
EC6, electric capacity C18 and transient diode TVS1, its end node ground connection in parallel simultaneously couple, another end node with sampling rectifier bridge
With exporting power on signal after sampling rectifier bridge coupling.
As a further improvement on the present invention, in addition to position signalling sample circuit, the position signalling sample circuit bag
Include position optical coupling isolator, input and the sampling rectifier bridge coupling, to obtain power on signal, institute of the position optical coupling isolator
Rheme put optical coupling isolator output end be coupled with electric capacity C20 after be grounded, be also coupled to resistance R47 and be followed by power supply, and gone back coupling
Coupled after being connected to socket CZ7 with governor circuit.
As a further improvement on the present invention, in addition to voltage sampling circuit, the voltage sampling circuit and governor circuit
Coupling, the voltage sampling circuit include low pressure sample circuit and real pressure sample circuit, and the low pressure sample circuit 2 is adopted with real pressure
Sample circuit couples with governor circuit, and the real pressure sample circuit includes voltage transformer, the input of the voltage transformer
It is coupled with resistance R1 and is coupled with main power source or stand-by power source, the voltage transformer has two output ends, the mutual induction of voltage
Resistance R10 and electric capacity C1 are coupled between two output ends of device, one of output end of the voltage transformer is also coupled to
Have and be grounded after coupling capacitance C2 after resistance R7, the node between the resistance R7 and electric capacity C2 couples with governor circuit, described low
Sample circuit is pressed to include sampling optical coupling isolator, the sampling optical coupling isolator has two inputs and two output ends, institute
State and be coupled with resistance R24 between two inputs of sampling optical coupling isolator, and one of input has been also coupled to resistance
Coupled after R17 with main power source or stand-by power source, wherein one end of two output ends of the sampling optical coupling isolator and power supply coupling
Connect, the other end is coupled with after resistance R23 and is grounded after coupling resistance R28, and is also coupled with governor circuit, the resistance R28 two
End is also parallel with one another electric capacity EC1 and electric capacity C13.
As a further improvement on the present invention, in addition to reference voltage circuit, the reference voltage circuit and governor circuit
Coupling, also coupled with plate internal power circuit, the reference voltage circuit output reference voltage is to governor circuit.
As a further improvement on the present invention, in addition to fire alarm circuit, the fire alarm circuit include fire-fighting light
Coupling isolator, the fire-fighting optical coupling isolator have two inputs and two output ends, and the two of the fire-fighting optical coupling isolator
Piezo-resistance VR3 is coupled between individual input and is coupled with outside fire-fighting signal source, it is described to disappear to obtain fire alarm signal
Between two output ends of anti-optical coupling isolator after shunt capacitance C34, wherein one end is grounded, after the other end is coupled with resistance R66
Power supply is connect, and is coupled with governor circuit.
As a further improvement on the present invention, in addition to delay setting circuit, the delay setting circuit and governor circuit
Coupling, also coupled with plate internal power circuit, the delay setting circuit includes two potentiometers, two of each potentiometer
Definite value end is grounded and is coupled with respectively resistance R63 or resistance R64 is followed by power supply, and the adjustable side of two potentiometers is and master control
Circuit couples.
As a further improvement on the present invention, total lock on-off circuit, total lock on-off circuit and plate internal power circuit coupling
Connect, total lock on-off circuit includes single-pole single-throw switch (SPST), one end ground connection of the single-pole single-throw switch (SPST), and the other end is coupled with electricity
It is connected after resistance R61 with plate internal power circuit.
Beneficial effects of the present invention, the plate internal power circuit of setting can provide phase for switching execution circuit and governor circuit
The operating voltage of adaptation, such governor circuit can be controlled to switch driving chip, and pass through switch drive chip
Set, the control of zero line controlling switch and live wire controlling switch can also be made more convenient, and simplify circuit, compared to existing
A dpdt relay having while the zero line and live wire of main power source and stand-by power source are accessed, this programme is by main power source and standby electricity
The zero line in source is accessed on same zero line controlling switch K1, and the live wire of main power source and stand-by power source is accessed in same live wire control
On system switch K2, so zero line controlling switch K1 and live wire controlling switch K2 are separated by and are arranged distant from, such zero line controlling switch
K1 exports main circuit zero line or stand-by circuit zero line, live wire controlling switch K2 output main circuit live wires or stand-by circuit live wire, this
Sample can realize the remote of power line, so by connected mode add electric clearance, make that two conductive pressure differences are larger zero
Part is located remotely from each other, and live wire controlling switch K2 only controls the break-make of the live wire of main power source and stand-by power source, zero line controlling switch
K1 only controls the break-make of the zero line of main power source and stand-by power source, so avoids dpdt relay of the prior art and produces
The phenomenon of electric arc, by the setting of switch drive chip, zero line controlling switch K1 and live wire controlling switch K2 control can also be made
System is more convenient, and simplifies circuit.
Brief description of the drawings
Fig. 1 is circuit block diagram of the present invention；
Fig. 2 is voltage sampling circuit of the present invention and reference voltage circuit figure；
Fig. 3 is present invention switching execution circuit figure；
Fig. 4 is position signalling sample circuit of the present invention and fire alarm circuit diagram；
Fig. 5 is plate internal power circuit figure of the present invention；
Fig. 6 is governor circuit of the present invention, key circuit and total lock on-off circuit figure.
Embodiment
The present invention is described in further detail below in conjunction with the embodiment given by accompanying drawing.
Shown in reference picture 1-6, a kind of main secondary power switching circuit of the present embodiment, including governor circuit 1, plate interior power electricity
Road 2 and switching execution circuit 3, the plate internal power circuit 2 with switch execution circuit 3 couple, the plate internal power circuit 2 also with
Governor circuit 1 couples, and the plate internal power circuit 2 provides working power to governor circuit 1 and switching execution circuit 3, the master
Control circuit 1 couples with switching execution circuit 3, and to send switching signal, the switching execution circuit 3 receives switching signal and switched
Action, the switching execution circuit 3 include power selection circuit 32 and switch drive chip 31, the power selection circuit 32 and
Switch drive chip 31 couples, and the switch drive chip 31 couples with governor circuit 1, to receive cutting for the output of governor circuit 1
Signal is changed, the power selection circuit 32 also couples with main power source and stand-by power source, and the power selection circuit 32 includes zero line control
System switch K1 and live wire controlling switch K2, the zero line controlling switch K1 couple with the zero line of main power source and stand-by power source, the fire
Line control switch K2 switchs to be coupled with the live wire of main power source and stand-by power source, the zero line controlling switch K1 and live wire controlling switch K2
Also coupled with switch drive chip 31, and switching output main power source or stand-by power source are controlled by switch drive chip 31.
Pass through above-mentioned technical proposal, the plate internal power circuit of setting can be that switching execution circuit 3 and governor circuit 1 provide
The operating voltage being adapted, peripheral circuit system of the governor circuit 1 including at least one main control chip and its normal work here
System, such governor circuit 1 can be controlled to switch driving chip 31, and by the setting of switch drive chip 31,
The control of zero line controlling switch and live wire controlling switch can be made more convenient, and simplify circuit, user is if desired
Main power source is exported, then zero line controlling switch K1 and live wire controlling switch K2 is distinguished into switching to main electricity using switch drive chip 2
Source zero line and main power source live wire, so both exportable main power sources, when user needs to export stand-by power source, then utilize switch drive core
Zero line controlling switch K1 and live wire controlling switch K2 is distinguished switching to stand-by power source zero line and stand-by power source live wire by piece 2, so both may be used
Stand-by power source is exported, accesses the zero line and live wire of main power source and stand-by power source simultaneously compared to an existing dpdt relay, this
Scheme accesses the zero line of main power source and stand-by power source on same zero line controlling switch K1, by main power source and the live wire of stand-by power source
Zero line controlling switch K1 and live wire controlling switch K2 are so separated by remote set by access on same live wire controlling switch K2
Put, so by connected mode add electric clearance, be located remotely from each other two larger parts of conductive pressure difference, such zero line
Controlling switch K1 exports main circuit zero line or stand-by circuit zero line, live wire controlling switch K2 output main circuit live wires or stand-by circuit
Live wire, the remote of power line can be so realized, and live wire controlling switch K2 only controls the live wire of main power source and stand-by power source
Break-make, zero line controlling switch K1 only control the break-make of the zero line of main power source and stand-by power source, so avoided of the prior art
Dpdt relay produces the phenomenon of electric arc, and by the setting of switch drive chip 2, can also make zero line controlling switch
K1 and live wire controlling switch K2 control are more convenient, and simplify circuit.
As an improved embodiment, the zero line controlling switch K1 and live wire controlling switch K2 are that double-pole is double
The selective relay thrown, it has four inputs and two output ends, zero line controlling switch K1 and live wire controlling switch K2's
Coil couples with switch drive chip 31, wherein zero line controlling switch K1 two of which input respectively with main power source and standby
The zero line connection of power supply, the equal sky of two other input connects, and when zero line controlling switch K1 is normally opened or during adhesive, the zero line
Controlling switch K1 two output ends export main power source zero line and connect sky or connect empty and stand-by power source zero line；The live wire control is opened
Live wire of the K2 two of which input respectively with main power source and stand-by power source is closed to be connected, the equal sky of two other input connects, and
When live wire controlling switch K2 is normally opened or during adhesive, live wire controlling switch K2 two output ends output main power source live wire and connect
Sky connects empty and stand-by power source live wire.
Pass through above-mentioned technical proposal, employ the selective relay of two DPDTs, the choosing of such a DPDT
When selecting relay normally open, the contact of one of armature contact is connected with main power source zero line, and the contact of another armature contact connects
Sky, when the selective relay adhesive, the contact contacted now with the armature of the contact of main power source zero line connection originally connects
Sky, the contact of another armature contact connect stand-by power source zero line, and the selective relay of another DPDT is connected using identical
Mode is connected with main power source live wire and stand-by power source live wire, two armature of such zero line controlling switch K1 selective relay it is defeated
Go out to become one of them to connect space-time another connects main power source zero line or one of them connects stand-by power source zero line another connects sky, fire
The output of two armature of line control switch K2 selective relay will become one of them and connect space-time another connect main power source
Another connects sky, the switching of the such way of output can control main power supply during live wire or during one of stand-by power source live wire
Main power source and stand-by power source are exported, and is switched compared to large power triode, large power triode heating is serious, and cost is very
Height, price, Control is convenient, and principle is simple.
As an improved embodiment, the plate internal power circuit 2 includes main power transformer 21 and stand-by power source
Transformer 22, the input of the main power transformer 21 and stand-by power source transformer 22 are connected with main power source and stand-by power source respectively,
The output end of the main power transformer 21 and stand-by power source transformer 22 has been respectively coupled to main rectifier bridge 23 and standby rectifier bridge 233,
The main rectifier bridge 23 has been also coupled to mu balanced circuit 27, and the standby rectifier bridge 233 is coupled to mu balanced circuit 27, the mu balanced circuit
27 include the first mu balanced circuit 271 and the second mu balanced circuit 272, the mu balanced circuit 272 of the first mu balanced circuit 271 and second
Coupled after input short circuit with main rectifier bridge 23 and standby rectifier bridge 233, the mu balanced circuit of the first mu balanced circuit 271 and second
The power supply of the different voltage series of 272 outputs, input and the main electricity of the main power transformer 21 and stand-by power source transformer 22
Protection circuit 26 is also coupled between source and stand-by power source, the protection circuit 26 includes piezo-resistance VR1, PTC resistor PTC1
Being coupled with fuse FU1, one end and the piezo-resistance VR1 of the fuse FU1, the other end is connected with main power source or stand-by power source,
After one end couplings of the piezo-resistance VR1 with respect to the other end and the PTC resistor PTC1 of fuse with main power source or stand-by power source coupling
Connect, the other ends of the PTC resistor PTC1 with respect to piezo-resistance VR1 and main power transformer 21 or stand-by power source transformer 22 it is defeated
Enter end coupling, node and main power transformer 21 or stand-by power source transformer 22 between the fuse FU1 and piezo-resistance VR1
Input coupling.
Pass through above-mentioned technical proposal, the first mu balanced circuit 271 and the second mu balanced circuit 272 can be 12V voltage stabilizing cores herein
Piece and 5V voltage stabilizing chips and its existing peripheral circuit composition, user need to only connect main power source or stand-by power source can passes through
The plate internal power circuit 2 of the present embodiment carries out the transformation of main power transformer 21 or stand-by power source transformer 22, then by master
Rectifier bridge 23 or standby rectifier bridge 233 export pulse direct current after carrying out rectification, then are linked into 12V voltage stabilizing chips and 5V voltage stabilizing chips
In, voltage stabilizing output 12V voltage-stabilized power supplies and 5V voltage-stabilized power supplies are carried out, 12V voltage stabilizing chips can be L7812CV model chips here,
Here 5V voltage stabilizing chips can be LM2575S-5 model chips, and because be wherein the one of main power source or stand-by power source during conducting
It is individual or be both not turned on, be not in two phenomenons turned on together, so employ two transformers respectively based on electricity
Source transformer 21 and stand-by power source transformer 22, and same mu balanced circuit 27 is coupled in its output end, but also in main power source
Piezo-resistance VR1 is coupled between two ports of the input of transformer 21 and stand-by power source transformer 22, can so be played
Anti-surging function, and PTC resistor PTC1 is also add, it can so be produced when piezo-resistance VR1 short circuits carry out Anti-surging action
Raw high temperature, such PTC resistor PTC1 cans increase the resistance value of oneself, so as to which subsequent conditioning circuit be disconnected, then treat pressure-sensitive electricity
Circuit after resistance VR1 temperature declines slowly turns on again, and the phenomenon for being so not in circuit transient switching can be with protection circuit
It will not be burnt out because of instantaneous pressure, while excessive electric current can also make fuse FU1 fuse, so when electric current is excessive and can be with
Protection subsequent conditioning circuit will not be burned, and the output end of main power transformer 21 and stand-by power source transformer 22 has been respectively coupled to master
Rectifier bridge 23 and standby rectifier bridge 233, and its output end has coupled same 12V voltage stabilizing chips and 5V voltage stabilizing chips, because
Active and standby power supply only has a conducting, so using public element, can thus save cost, and can give
There is provided various operating voltages to power to corresponding circuit, ensure the normal operation of circuit.
As an improved embodiment, the output end of the main power transformer 21 and stand-by power source transformer 22 is also
Main sampling rectifier bridge 24 and standby sampling rectifier bridge 244 are respectively coupled to, the main sampling rectifier bridge 24 has been also coupled to location circuit
25, the standby sampling rectifier bridge 244 is coupled to location circuit 25, and the location circuit 25 exports power on signal, the position electricity
Road 25 includes electric capacity EC6 parallel with one another, electric capacity C18 and transient diode TVS1, and its end node in parallel is grounded and with adopting
Sample rectifier bridge 24 couples, and another end node exports power on signal after being coupled with sampling rectifier bridge 24.
Pass through above-mentioned technical proposal, it is respectively coupled to again in the output end of main power transformer 21 and stand-by power source transformer 22
Main sampling rectifier bridge 24 and standby sampling rectifier bridge 244, and in the output end of main sampling rectifier bridge 24 and standby sampling rectifier bridge 244
Transient Suppression Diode TVS1 is also coupled to after having coupled public electric capacity EC6 and electric capacity C18, the so main sampling He of rectifier bridge 24
The signal that standby sampling rectifier bridge 244 exports is gone by Transient Suppression Diode TVS1 again after electric capacity EC6 and electric capacity C18 filtering
Interference, and Transient Suppression Diode TVS1 can be used for absorbing the high pressure of moment, prevent high pressure from causing subsequent conditioning circuit to burn,
Stable and accurate power on signal so out is exported, and compared to directly to main sampling rectifier bridge 24 and standby sampling rectification
The output signal of bridge 244 is filtered post-sampling, and embodiment adds Transient Suppression Diode TVS1, can be gone with significantly more efficient
Except interference, sampling precision is further increased, improves the accuracy of sampling, and main transformer and standby transformer secondary output are divided to two
Group output, it is effectively isolated the position signalling sample circuit and governor circuit of outside.
As an improved embodiment, in addition to position signalling sample circuit 5, the position signalling sample circuit
5 include position optical coupling isolator 51, and input and the sampling rectifier bridge 24 of the position optical coupling isolator 51 couple, logical to obtain
Electric signal, the output end of the position optical coupling isolator 51 are grounded after being coupled with electric capacity C20, have been also coupled to resistance R47 and have been followed by electricity
Source, and coupled after being also coupled to magnetic bead CZ7 with governor circuit 1.
Pass through above-mentioned technical proposal, when position optical coupling isolator 51 receives the energization that Transient Suppression Diode TVS1 sends
After signal, the lumination of light emitting diode in position optical coupling isolator 51, the then photosensitive semiconductor in position optical coupling isolator 51
Turn on, the level of the output end for the position optical coupling isolator 51 that will make to couple with governor circuit 1 drags down, and can thus make
Governor circuit 1 detects the level change of the output end, can thus detect to have been received by power on signal, and pass through
Position optical coupling isolator 51 carries out signal sampling, so compares and external signal directly is linked into governor circuit 1 sampled, just
Can be safer, external signal can be isolated and low and high level signal can also be gathered, so can both be protected
Governor circuit can carry out signal sampling again, and the electric capacity C20 in parallel between the output end of optical coupling isolator 51, so
When becoming high level again again after being pulled low in one end that governor circuit 1 receives, power supply needs first to charge to electric capacity C20, this
Sample can be such that voltage slowly rises, rather than moment produces high level, so further protect governor circuit 1, and also have
It magnetic bead CZ7, can be used for anti-Radio frequency interference, preferably improve the stability of circuit.
As an improved embodiment, in addition to voltage sampling circuit 4, the voltage sampling circuit 4 and master control
Circuit 1 couples, and the voltage sampling circuit 4 includes low pressure sample circuit 422 and real pressure sample circuit 411, the low pressure sampling
Circuit 422 couples with real pressure sample circuit 411 with governor circuit 1, and the real pressure sample circuit 411 includes voltage transformer
41, the input of the voltage transformer 41 is coupled with resistance R1 and coupled with main power source or stand-by power source, the voltage transformer
41 have two output ends, and resistance R10, the voltage transformer are coupled between two output ends of the voltage transformer 41
41 one of output end has been also coupled to be grounded after coupling capacitance C2 after resistance R7, the section between the resistance R7 and electric capacity C2
Point couples with governor circuit 1, and the low pressure sample circuit 422 includes sampling optical coupling isolator 42, the sampling optical coupling isolator
42 have two inputs and two output ends, and resistance is coupled between two inputs of the sampling optical coupling isolator 42
R24, and one of input has been also coupled to after resistance R17 couple with main power source or stand-by power source, the sampling optocoupler every
Wherein one end and supply coupling from two output ends of device 42, coupling resistance R28 is followed by after the other end is coupled with resistance R23
Ground, and also coupled with governor circuit 1, the resistance R28 both ends are also parallel with one another electric capacity EC1 and electric capacity C13.
Pass through above-mentioned technical proposal, real press in sample circuit 411 employ voltage transformer 41, thus can be by outside
Signal source is isolated, and will not be entered directly into governor circuit 1, accordingly even when in external signal big ups and downs, inside is main
Control circuit 1 will not also be burnt out, and further protect the governor circuit 1 during real pressure sampling, and voltage transformer 41 herein can select
With the voltage transformer 41 of ZMPT107 models, the ratio of the resistance set by input and output end can adjust output with
The voltage ratio of output, Uo=Ui*Ro/Ri, the voltage of output end are multiplied by output end resistance divided by input for input terminal voltage
Resistance, so may be adjusted to suitable measurement range, such as the resistance R1, R5 in Fig. 2 are input pickup resistance, and resistance R10 is
Output end resistance, and the output end of voltage transformer 41 is connected to after resistance R7 carries out current limliting and filtered by electric capacity C2
Ripple, exports low current and stable voltage signal is to governor circuit 1, is received by governor circuit 1 and reality is calculated
Border magnitude of voltage, while low pressure sample circuit 422 is also provided with, the voltage of outside live wire is directly sampled, wherein employing
Optical coupling isolator 42 is sampled, the too high voltage signal of the live wire of outside can thus be isolated, by sampling optocoupler
Isolator 42 changes into relatively low voltage signal and received for governor circuit 1, can further protect governor circuit 1, and this is adopted
The input of sample optical coupling isolator 42 can connect multiple main power sources or stand-by power source, so when multiple main power sources and stand-by power source all do not have
When having power input, the output end meeting mutual conduction of sampling optical coupling isolator 42, the one end for exporting termination power can be with being connected master
One end connection of circuit 1 is controlled, and current limliting and partial pressure are carried out by resistance R23 and resistance R28 and pass through electric capacity EC1 and electricity again afterwards
Hold C13 filtering, it is possible to obtain magnitude of voltage and current value is smaller and stable electric signal, be so input in governor circuit 1,
Governor circuit 1 can more accurately be judged, reduce error rate, and small voltage low current can preferably protect master control
Circuit 1 is not burned, while whether main power source or stand-by power source all do not have voltage outside the multichannel that can be detected while detect.
As an improved embodiment, in addition to reference voltage circuit 43, the reference voltage circuit 43 and master
Control circuit 1 couples, and is also coupled with plate internal power circuit 2, the output reference voltage of reference voltage circuit 43 is to governor circuit 1.
Pass through above-mentioned technical proposal, the reference voltage circuit 43 can be reference pole and the moon of TL431 voltage stabilizing triodes
The connected mode of the extremely short connected mode output 2.5V reference voltages connect, 2.5V reference voltage is exported to governor circuit 1, so
Governor circuit 1 can obtain high-precision reference voltage, can so improve precision during ADC sampled voltages, compared to directly making
The a reference value carried with governor circuit 1, the present embodiment can provide the outside precision voltage reference of governor circuit 1, greatly improve
The accuracy of voltage sample.
As an improved embodiment, in addition to fire alarm circuit 52, the fire alarm circuit 52 includes
Fire-fighting optical coupling isolator 53, the fire-fighting optical coupling isolator 53 have two inputs and two output ends, the fire-fighting optocoupler
Piezo-resistance VR3 is coupled between two inputs of isolator 53 and is coupled with outside fire-fighting signal source, to obtain fire-fighting police
The number of notifying, between two output ends of the fire-fighting optical coupling isolator 53 after shunt capacitance C34, wherein one end is grounded, the other end
It is coupled with resistance R66 and is followed by power supply, and is coupled with governor circuit 1.
Pass through above-mentioned technical proposal, it can be connected by the fire alarm circuit 52 of setting with the fire-fighting signal source of outside,
Such as the alarm signal that fire alarm apparatus is sent, after such fire alarm circuit 52 receives fire-fighting signal, fire-fighting will be made
The lumination of light emitting diode of optical coupling isolator 53, then causes photosensitive semiconductor conducting, and such output end connects governor circuit 1
One end can be pulled low, and the saltus step of such low and high level can produce the judgement signal for determining whether fire alarm, when this
The level of output end, which is pulled low, to be made, and judges there is fire alarm, and so when there is fire alarm outside, governor circuit 1, which receives, to disappear
Anti- alarm signal, such governor circuit 1 can control active and standby power supply to turn off, and can so avoid the fountain head ejection that disappears
Water causes the phenomenon of circuit breaker burning apparatus, while is also provided with piezo-resistance VR3, can be with Anti-surging.
As an improved embodiment, in addition to delay setting circuit 6, the delay setting circuit 6 and master control
Circuit 1 couples, and is also coupled with plate internal power circuit 2, and the delay setting circuit 6 includes two potentiometers 61, each electricity
Two definite value ends of position device 61 are grounded and are coupled with respectively resistance R63 or resistance R64 and are followed by power supply, two potentiometers 61
Adjustable side couples with governor circuit 1.
Pass through above-mentioned technical proposal, user can by adjust the adjustable side of potentiometer 61 change the resistance value of output come
Adjustment delay option, governor circuit 1 can obtain the magnitude of voltage corresponding to the resistance value of the output of potentiometer 61 after partial pressure to judge
The delay duration of user's setting, if be not delayed, the switching of main power supply can be very fast, if instantaneous power-off, that
Moment has electricity to be so very easy to burn out circuit element and equipment again after power-off, can once be powered off after setting delay, needs
To turn on again after a period of time, can thus avoid this phenomenon from burning out equipment and circuit element, more preferable protection equipment
And circuit.
As an improved embodiment, total lock on-off circuit 7, total lock on-off circuit 7 and plate interior power are electric
Road 2 couples, and total lock on-off circuit 7 includes single-pole single-throw switch (SPST), one end ground connection of the single-pole single-throw switch (SPST), other end coupling
It is connected after being connected to resistance R61 with plate internal power circuit 2.
Pass through above-mentioned technical proposal, when single-pole single-throw switch (SPST) closes, the working power that the plate internal power circuit 2 provides is just
It can be grounded after resistance R61, such governor circuit 1 does not just have working power, can not just be controlled by switch drive chip 31
Selective relay and zero line controlling switch K1 and live wire controlling switch K2 switching, all relays can all enter normal in circuit
Open state, and do not have power input, would not be powered in such circuit, and referred to herein as single-pole single-throw switch (SPST) connect
Power supply is the working power that plate internal power circuit 2 provides, and the working power is low-tension supply, so compares and is directly connected on electric brake
It is safer when user closes total lock on main power source and stand-by power source, it will not get an electric shock, it is possible to achieve the single-pole single-throw(SPST of small voltage is opened
Close the break-make for the active and standby circuit for controlling big voltage.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of main secondary power switching circuit, including governor circuit (1), plate internal power circuit (2) and switching execution circuit (3),
The plate internal power circuit (2) with switching execution circuit (3) couple, the plate internal power circuit (2) also with governor circuit (1) coupling
Connect, the plate internal power circuit (2) provides working power to governor circuit (1) and switching execution circuit (3), the governor circuit
(1) coupled with switching execution circuit (3), to send switching signal, the switching execution circuit (3) receives switching signal and switched
Action, the switching execution circuit (3) include power selection circuit (32) and switch drive chip (31), the power supply selection electricity
Road (32) couples with switch drive chip (31), and the switch drive chip (31) couples with governor circuit (1), to receive master control
The switching signal of circuit (1) output, the power selection circuit (32) also couple with main power source and stand-by power source, it is characterised in that
The power selection circuit (32) includes zero line controlling switch K1 and live wire controlling switch K2, the zero line controlling switch K1 and master
The zero line of power supply and stand-by power source couples, and the live wire controlling switch K2 switches couple with the live wire of main power source and stand-by power source, described
Zero line controlling switch K1 and live wire controlling switch K2 also couples with switch drive chip (31), and by switch drive chip (31)
Control switching output main power source or stand-by power source.
2. main secondary power switching circuit according to claim 1, it is characterised in that the zero line controlling switch K1 and live wire
Controlling switch K2 is the selective relay of DPDT, and it has four inputs and two output ends, zero line controlling switch
K1 and live wire controlling switch K2 coil couple with switch drive chip (31), wherein zero line controlling switch K1 two of which
Zero line of the input respectively with main power source and stand-by power source is connected, and the equal sky of two other input connects, and when zero line control is opened
When closing K1 normally opened or adhesive, zero line controlling switch K1 two output ends export main power source zero line and connect sky or connect empty and standby
Zero-power line；Live wire of the two of which input of the live wire controlling switch K2 respectively with main power source and stand-by power source is connected, separately
The equal sky of outer two inputs connects, and when live wire controlling switch K2 is normally opened or during adhesive, two of live wire controlling switch K2
Output end exports main power source live wire and connects sky or connect empty and stand-by power source live wire.
3. main secondary power switching circuit according to claim 1 or 2, it is characterised in that plate internal power circuit (2) bag
Include main power transformer (21) and stand-by power source transformer (22), the main power transformer (21) and stand-by power source transformer (22)
Input is connected with main power source and stand-by power source respectively, the output end of the main power transformer (21) and stand-by power source transformer (22)
Main rectifier bridge (23) and standby rectifier bridge (233) are respectively coupled to, the main rectifier bridge (23) has been also coupled to mu balanced circuit (27), institute
State standby rectifier bridge (233) and be coupled to mu balanced circuit (27), the mu balanced circuit (27) includes the first mu balanced circuit (271) and second
After the input short circuit of mu balanced circuit (272), first mu balanced circuit (271) and the second mu balanced circuit (272) with main rectification
Bridge (23) and standby rectifier bridge (233) couple, and first mu balanced circuit (271) is different with the second mu balanced circuit (272) output
The input of the power supply of voltage series, the main power transformer (21) and stand-by power source transformer (22) and main power source and stand-by power source
Between be also coupled with protection circuit (26), the protection circuit (26) includes piezo-resistance VR1, PTC resistor PTC1 and insurance
Silk FU1, the fuse FU1 one end are coupled with piezo-resistance VR1, and the other end is connected with main power source or stand-by power source, the pressure
Quick resistance VR1 is coupled after being coupled with respect to the other end of fuse with PTC resistor PTC1 one end with main power source or stand-by power source, described
The input of the other ends of the PTC resistor PTC1 with respect to piezo-resistance VR1 and main power transformer (21) or stand-by power source transformer (22)
End coupling, node and main power transformer (21) or stand-by power source transformer between the fuse FU1 and piezo-resistance VR1
(22) input coupling.
4. main secondary power switching circuit according to claim 3, it is characterised in that the main power transformer (21) and standby
The output end of power transformer (22) has also been respectively coupled to main sampling rectifier bridge (24) and standby sampling rectifier bridge (244), the master
Sampling rectifier bridge (24) has been also coupled to location circuit (25), and the standby sampling rectifier bridge (244) is coupled to location circuit (25), institute
Rheme circuits (25) export power on signal, and the location circuit (25) includes electric capacity EC6 parallel with one another, electric capacity C18 and wink
State diode TVS1, its end node ground connection in parallel simultaneously couple with sampling rectifier bridge (24), another end node and sampling rectification
Power on signal is exported after bridge (24) coupling.
5. main secondary power switching circuit according to claim 4, it is characterised in that also including position signalling sample circuit
(5), the position signalling sample circuit (5) includes position optical coupling isolator (51), the position optical coupling isolator (51) it is defeated
Enter end to couple with sampling rectifier bridge (24), to obtain power on signal, the output end of the position optical coupling isolator (51) is coupled with
It is grounded after electric capacity C20, has been also coupled to resistance R47 and has been followed by power supply, and is coupled after being also coupled to magnetic bead CZ7 with governor circuit (1).
6. main secondary power switching circuit according to claim 5, it is characterised in that also including voltage sampling circuit (4), institute
Voltage sampling circuit (4) and governor circuit (1) is stated to couple, the voltage sampling circuit (4) include low pressure sample circuit (422) with
Real pressure sample circuit (411), the low pressure sample circuit (422) and real pressure sample circuit (411) with governor circuit (1) coupling
Connect, the real pressure sample circuit (411) includes voltage transformer (41), and the input of the voltage transformer (41) is coupled with electricity
Hinder R1 and coupled with main power source or stand-by power source, the voltage transformer (41) has two output ends, the voltage transformer
(41) resistance R10 and electric capacity C1, one of output end of the voltage transformer (41) are coupled between two output ends
It has been also coupled to be grounded after coupling capacitance C2 after resistance R7, the node between the resistance R7 and electric capacity C2 and governor circuit (1) coupling
Connect, the low pressure sample circuit (422) includes sampling optical coupling isolator (42), and the sampling optical coupling isolator (42) has two
Input and two output ends, it is described sampling optical coupling isolator (42) two inputs between be coupled with resistance R24, and its
In an input be also coupled to after resistance R17 couple with main power source or stand-by power source, the sampling optical coupling isolator (42)
Wherein one end of two output ends and supply coupling, the other end are coupled with after resistance R23 and are grounded after coupling resistance R28, and also
Coupled with governor circuit (1), the resistance R28 both ends are also parallel with one another electric capacity EC1 and electric capacity C13.
7. main secondary power switching circuit according to claim 1 or 2, it is characterised in that also including reference voltage circuit
(43), the reference voltage circuit (43) couples with governor circuit (1), is also coupled with plate internal power circuit (2), the benchmark electricity
Volt circuit (43) output reference voltage gives governor circuit (1).
8. main secondary power switching circuit according to claim 1 or 2, it is characterised in that also including fire alarm circuit
(52), the fire alarm circuit (52) includes fire-fighting optical coupling isolator (53), and the fire-fighting optical coupling isolator (53) has two
Individual input and two output ends, piezo-resistance VR3 is coupled between two inputs of the fire-fighting optical coupling isolator (53)
And coupled with outside fire-fighting signal source, to obtain fire alarm signal, two output ends of the fire-fighting optical coupling isolator (53)
Between after shunt capacitance C34, wherein one end is grounded, and the other end is coupled with resistance R66 and is followed by power supply, and with governor circuit (1)
Coupling.
9. main secondary power switching circuit according to claim 1 or 2, it is characterised in that also including delay setting circuit
(6), the delay setting circuit (6) couples with governor circuit (1), is also coupled with plate internal power circuit (2), the delay adjustmentses
Circuit (6) includes two potentiometers (61), and two definite value ends of each potentiometer (61) are grounded and be coupled with respectively resistance
R63 or resistance R64 is followed by power supply, and the adjustable side of two potentiometers (61) couples with governor circuit (1).
10. main secondary power switching circuit according to claim 2, it is characterised in that total lock on-off circuit (7), it is described total
Lock on-off circuit (7) couples with plate internal power circuit (2), and total lock on-off circuit (7) includes single-pole single-throw switch (SPST), the list
One end ground connection of monopole single throw switch, the other end are connected after being coupled with resistance R61 with plate internal power circuit (2).
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| CN201711060610.0A CN107733073B (en) | 2017-11-01 | 2017-11-01 | Main and standby power supply switching circuit |
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| CN201711060610.0A CN107733073B (en) | 2017-11-01 | 2017-11-01 | Main and standby power supply switching circuit |
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| CN107733073B (en) | 2024-03-15 |
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