CN106532914A - Dual-switching uninterrupted power supply device - Google Patents
Dual-switching uninterrupted power supply device Download PDFInfo
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- CN106532914A CN106532914A CN201611065897.1A CN201611065897A CN106532914A CN 106532914 A CN106532914 A CN 106532914A CN 201611065897 A CN201611065897 A CN 201611065897A CN 106532914 A CN106532914 A CN 106532914A
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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
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- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a dual-switching uninterrupted power supply device, which comprises a power supply, a UPS and a PLC device. The power supply end of the power supply provides power for the PLC device through the UPS. The dual-switching uninterrupted power supply device is characterized in that the dual-switching uninterrupted power supply device also comprises an uninterrupted switching module, an instantaneous constant-voltage power supply module, a stand-by power supply switching module and a stand-by power supply. A power connection port of the uninterrupted switching module is connected with power output ports of the power supply and the UPS; a power output port of the uninterrupted switching module is connected with the instantaneous constant-voltage power supply module; a power connection port of the stand-by power supply switching module is connected with the instantaneous constant-voltage power supply module and the stand-by power supply; and a power output port of the stand-by power supply switching module is connected with the PLC device. By adding the uninterrupted switching module between the UPS and the PLC system, automatic switching between the two paths of power supplies is realized; and meanwhile, through the stand-by power supply for uninterrupted switching, seamless switching of the PLC power supply system is ensured, and continuous operation of electric equipment is ensured.
Description
Technical field
The present invention relates to PLC power supply technique fields, more particularly to a kind of dual switching electric supply installation free of discontinuities.
Background technology
At present, PLC be at home and abroad widely used to iron and steel, oil, chemical industry, electric power, building materials, machine-building, automobile,
The industry-by-industries such as light textile, communications and transportation, environmental protection and entertainment.Such as more controller switching equipment and auxiliary power supply in electric power system
It is exactly the core by the use of PLC as automatic control system, using dispersion centralized control system, ensures the steady of electric power system
Operation and the normal use of electricity consumption user, PLC serve vital effect.Wherein, electric power system is to ensure PLC systems
The important step of normal operation, in order to ensure even running and the continuous-stable supplying power for outside of electric power system, no matter from the initial stage
Lectotype selection, or later stage construction, it is necessary to set up successive check.Find in actual production：The number of stoppages of PLC electric power systems with
The growth of the increase and run time of distribution class quantity has the trend of cumulative year after year.
The classification of the PLC system failures has：PLC module reasons, 220V ac power supply system reasons, 24V direct current supplys system
System reason, auxiliary device reason.PLC module failures and auxiliary device failure only can cause shadow to the subrange of PLC systems
Ring.And wherein electric power system（220V ac power supply systems and 24V DC power-supply systems）It is more that the number of stoppages accounts for part ratio, and
And UPS and 24V power failures, then can cause whole PLC systemic breakdowns.The operation principle of PLC electric power systems is powered for city
Source Jing uninterruption power sources（UPS）220V exchange outputs are provided.As UPS has burning voltage, electromagnetism interference, can use
The functions such as battery pack continued power, it is ensured that stable 220V exchange outputs.When UPS occurs hardware fault, PLC can be caused
Electric power system dead electricity, causes operation wholly off.Such as recover the normal operation of PLC electric power systems, manual mode need to be switched to,
And require that staff skillfully grasps operative skill, normal production run after about 30 minutes, can be recovered, treat that system is produced
The failure of UPS could be processed after operation.And most fast processing mode is exactly to change UPS, UPS is changed in the case where there is spare part
1 hour is taken around, the replacement cycle is then longer if there is no spare parts；Another kind of processing mode be maintenance UPS, but maintenance time compared with
It is long, need several hour times of even several days.
In addition, electric power system instantaneous voltage is unstable, the damage to equipment will be immeasurable, it is therefore desirable to ensure
The stability of power supply.
The content of the invention
It is an object of the invention to provide a kind of dual switching electric supply installation free of discontinuities, increases between UPS and PLC systems
The automatic conversion of two-way power supply after handover module free of discontinuities, is realized, while adopting stand-by power supply, is uninterruptedly changed, protected
The seamless switching of card PLC electric power systems, it is ensured that electrical equipment is continuously run.
The technical solution used in the present invention is：
A kind of dual switching electric supply installation free of discontinuities, including power supply, UPS and PLC device, the feeder ear of power supply pass through
UPS powers for PLC device, it is characterised in that：Also include that handover module free of discontinuities, instantaneous voltage stabilizing supply module, stand-by power supply are cut
Mold changing block and stand-by power supply, handover module free of discontinuities connect the transmission of electricity mouth that power port connects power supply and UPS respectively, free of discontinuities to cut
The transmission of electricity mouth of mold changing block connects instantaneous voltage stabilizing supply module, and the power port that connects of stand-by power supply handover module connects instantaneous voltage stabilizing confession respectively
Electric module and stand-by power supply, the transmission of electricity mouth connection PLC device of stand-by power supply handover module.
Described handover module free of discontinuities includes power supply main line, UPS main lines, switch control unit and output control
An air-break is respectively arranged in the supply line of unit processed, power supply main line and UPS main lines；Described switching
Control unit includes the first solid-state relay, the second solid-state relay, the 3rd solid-state relay, the 4th solid-state relay and electric current
The first end of transformer, the first solid-state relay and the 3rd solid-state relay be connected to power supply main line live wire and
On zero line, the first end of the second solid-state relay and the 4th solid-state relay is connected to the live wire and zero line of UPS main lines
On, the second end of the first solid-state relay and the second solid-state relay is connected to output control list through current mutual inductor coil
Second end of unit, the 3rd solid-state relay and the 4th solid-state relay is connected to output control unit, and current transformer passes through intelligence
Can ammeter be connected respectively to the second end and the 3rd solid-state relay and the of the first solid-state relay and the second solid-state relay
Second end of four solid-state relays；Described output control unit includes the first control relay, the second control relay and defeated
Go out circuit, the first control relay coil is serially connected with power supply main line, the second control relay coil by the first disconnecting link
UPS main lines are serially connected with by the second disconnecting link, two that the first control relay is sequentially provided with power supply main line are normally opened
Two normally-closed contacts of contact, two normally-closed contacts of the first control relay and the second control relay, the second control relay
Two normally opened contacts of device are respectively arranged on the live wire and zero line of UPS main lines, two normally opened contacts of the second control relay
Static contact connect respectively the first control relay two normally-closed contacts close the second control relays two normally-closed contacts it
Between, the static contact of two normally-closed contacts of the second control relay connects the first solid-state relay and the second solid-state relay respectively
The second end and the 3rd solid-state relay and the 4th solid-state relay the second end, normally opened touch at two of the first control relay
Connect outlet line between point and two normally-closed contacts of the first control relay, and outlet line is provided with fuse.
Described instantaneous voltage stabilizing supply module includes rectification module, voltage changing module, voltage regulation unit, dual flow-restriction and mistake
Stream buffer cell, the output end of rectification module connection outlet line, rectification module connection voltage changing module, voltage changing module connection voltage stabilizing
Unit, the output end of voltage regulation unit connect the input of dual flow-restriction, and the output end connection excessively stream of dual flow-restriction is delayed
Rush the input of unit, the output end of pressure-stabilizing connection stand-by power supply handover module of excessively stream buffer cell.
Described stand-by power supply handover module includes power supply mu balanced circuit and stand-by power supply power supply circuits, power supply
The power interface of mu balanced circuit connects the output end of pressure-stabilizing of excessively stream buffer cell, the power interface connection of stand-by power supply power supply circuits
Stand-by power supply.
Described voltage regulation unit includes the first fuse, the first end connection power supply of the first fuse, the second end company
Connect the negative electrode of three Zener diodes in parallel, the plus earth of three Zener diodes in parallel.
Described dual flow-restriction includes primary flow-restriction and secondary flow-restriction, and primary flow-restriction includes first
Sample resistance, the first end of the first sample resistance connect the second end of the first fuse, the second end connection of the first sample resistance
The emitter stage of the first triode, the base stage of the first triode is by first resistor ground connection, the first diode and the second diode string
Connection, the anode of the first diode connect the first end of the first sample resistance, and the negative electrode of the second diode connects the first triode
Base stage, the colelctor electrode of the first triode connect the grid of the first FET by the second sample resistance, the first FET
Source electrode is grounded by second resistance, and the base stage of the second triode connects the second end of the second sample resistance by 3rd resistor, the
The emitter stage of two triodes connects the colelctor electrode of the first triode, and the colelctor electrode of the second triode connects the source of the first FET
Pole；Secondary flow-restriction circuit structure is identical with primary flow-restriction circuit structure.
Described excessively stream buffer cell includes inductance, the output end of the secondary flow-restriction of first end connection of inductance, inductance
Two fly-wheel diodes in parallel, the second end of inductance is used as output end of pressure-stabilizing.
Described power supply mu balanced circuit includes the first parallel diode circuit.Described stand-by power supply power supply circuits bag
The first triode, the second triode and the 3rd triode are included, the base stage of the first triode is by first resistor silk connection the one or two
The negative pole of pole pipe, the positive pole connection stand-by power supply of the first diode, the emitter stage of the first triode once by second resistance silk,
3rd resistor silk and the second diode connection stand-by power supply, and the grounded emitter of the first triode, the current collection of the first triode
Pole connects the base stage of the second triode by the 4th resistance wire, and the emitter stage of the second triode is grounded by the 5th resistance wire, the
The colelctor electrode of two triodes connects the source electrode of the 3rd triode, and the grid of the 3rd triode is grounded by the 5th resistance wire, and the 3rd
The drain electrode of triode passes through the second parallel diode circuit output.
The present invention constitutes that the first weight is free of discontinuities to be cut handover module free of discontinuities is set up between PLC power supply units and UPS
Power supply is changed, when UPS hardware catastrophic failures lead to not power supply, after handover module free of discontinuities detects dead electricity signal, can be in 4-
5 milliseconds automatically switch to power supply, it is ensured that system is not affected by UPS and powered；Stand-by power supply handover module is recycled to exist
Switch between stand-by power supply and periphery power supply, even if periphery has a power failure, also can guarantee that the unremitting power supply of system.
Meanwhile, in the moment of peripheral power supply power transmission, ensure the stability of system voltage using instantaneous voltage stabilizing supply module, carry
High system service life.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of the present invention；
Fig. 2 is the handover module circuit theory diagrams free of discontinuities of the present invention；
Fig. 3 is the instantaneous voltage stabilizing supply module circuit theory diagrams of the present invention；
Fig. 4 is the stand-by power supply handover module circuit theory diagrams of the present invention.
Specific embodiment
As shown in figure 1, the present invention includes power supply, UPS and PLC device, the feeder ear of power supply by UPS is
PLC device is powered, also including handover module free of discontinuities, instantaneous voltage stabilizing supply module, stand-by power supply handover module and stand-by power supply,
Handover module free of discontinuities connects the transmission of electricity mouth that power port connects power supply and UPS respectively, and the transmission of electricity mouth of handover module free of discontinuities connects
Instantaneous voltage stabilizing supply module is connect, the power port that connects of stand-by power supply handover module connects instantaneous voltage stabilizing supply module and standby electricity respectively
Source, the transmission of electricity mouth connection PLC device of stand-by power supply handover module.
As shown in Fig. 2 described handover module free of discontinuities includes power supply main line, UPS main lines, switching control list
An air-break is respectively arranged in the supply line of unit and output control unit, power supply main line and UPS main lines；
Described switch control unit includes that the first solid-state relay 1, the second solid-state relay 2, the 3rd solid-state relay the 3, the 4th are solid
The first end of 4 summation current transformer of state relay, the first solid-state relay 1 and the 3rd solid-state relay 3 is connected to power supply
On the live wire and zero line of power supply main line, the first end of the second solid-state relay 2 and the 4th solid-state relay 4 is connected to
On the live wire and zero line of UPS main lines, the second end of the first solid-state relay 1 and the second solid-state relay 2 passes through Current Mutual Inductance
Device coil is connected to the second end of output control unit, the 3rd solid-state relay 3 and the 4th solid-state relay 4 and is connected to output control
Unit processed, current transformer are connected respectively to the of the first solid-state relay 1 and the second solid-state relay 2 by Intelligent current table
Two ends and the second end of the 3rd solid-state relay 3 and the 4th solid-state relay 4；Described output control unit includes the first control
Relay, the second control relay and outlet line, the first control relay coil are serially connected with power supply by the first disconnecting link
Main line, the second control relay coil are serially connected with UPS main lines by the second disconnecting link, are sequentially provided with power supply main line
The two of two normally opened contacts of the first control relay, two normally-closed contacts of the first control relay and the second control relay
Individual normally-closed contact, two normally opened contacts of the second control relay are respectively arranged on the live wire and zero line of UPS main lines, the second control
The static contact of two normally opened contacts of relay processed connects two normally-closed contacts of the first control relay respectively and closes the second control
Between two normally-closed contacts of relay, the static contact of two normally-closed contacts of the second control relay connects the first solid-state respectively
Second end at second end and the 3rd solid-state relay 3 and the 4th solid-state relay 4 of relay 1 and the second solid-state relay 2,
Connect outlet line between two normally-closed contacts of two normally opened contacts and the first control relay of the first control relay, and
Outlet line is provided with fuse W.
As shown in figure 3, described instantaneous voltage stabilizing supply module includes rectification module, voltage changing module, voltage regulation unit, dual limit
Stream unit and excessively stream buffer cell, the output end of rectification module connection outlet line, rectification module connection voltage changing module, become pressing mold
Block connects voltage regulation unit, and the output end of voltage regulation unit connects the input of dual flow-restriction, the output end of dual flow-restriction
The input of connection excessively stream buffer cell, the output end of pressure-stabilizing connection stand-by power supply handover module of excessively stream buffer cell.
Described voltage regulation unit includes the first fuse F1, the first end connection power supply of the first fuse F1, second
The negative electrode of three Zener diodes (D1, D2, D3) in parallel of end connection, the sun of three Zener diodes (D1, D2, D3) in parallel
Pole is grounded.
Described dual flow-restriction includes primary flow-restriction and secondary flow-restriction, and primary flow-restriction includes first
The first end of sample resistance R1, the first sample resistance R1 connects second end of the first fuse F1, and the of the first sample resistance R1
Two ends connect the emitter stage of the first triode Q9, and the base stage of the first triode Q9 is grounded by first resistor R15, the first diode
D24 and the second diode D25 series connection, the anode of the first diode D24 connect the first end of the first sample resistance R1, the two or two pole
The negative electrode of pipe D25 connects the base stage of the first triode Q9, and the colelctor electrode of the first triode Q9 is connected by the second sample resistance R2
The grid of the first FET Q2, the source electrode of the first FET Q2 are grounded by second resistance R7, the base of the second triode Q10
Pole connects second end of the second sample resistance R2 by 3rd resistor R16, and the emitter stage of the second triode Q10 connects the one or three pole
The colelctor electrode of pipe Q9, the colelctor electrode of the second triode Q10 connect the source electrode of the first FET Q2；Secondary flow-restriction circuit knot
Structure is identical with primary flow-restriction circuit structure.
Described excessively stream buffer cell includes inductance L, the output end of the secondary flow-restriction of first end connection of inductance L, electricity
Sense L two fly-wheel diodes (D32, D33) of parallel connection, second end of inductance L is used as output end of pressure-stabilizing.
As shown in figure 4, described stand-by power supply handover module includes that power supply mu balanced circuit and stand-by power supply are powered electricity
Road, the power interface of power supply mu balanced circuit connect the output end of pressure-stabilizing of excessively stream buffer cell, stand-by power supply power supply circuits
Power interface connects stand-by power supply.
Described power supply mu balanced circuit includes the first parallel diode circuit.Described stand-by power supply power supply circuits bag
The first triode Q6, the second triode Q5 and the 3rd triode Q3 are included, the base stage of the first triode Q6 passes through first resistor silk R9
Connect the negative pole of the first diode D4, the positive pole connection stand-by power supply of the first diode D4, the emitter stage of the first triode Q9 according to
It is secondary that stand-by power supply is connected by second resistance silk R12,3rd resistor silk R13 and the second diode D5, and the first triode Q9
Grounded emitter, the colelctor electrode of the first triode Q9 connect the base stage of the second triode Q5 by the 4th resistance wire R8, and the two or three
The emitter stage of pole pipe Q5 is grounded by the 5th resistance wire R11, and the colelctor electrode of the second triode Q5 connects the source of the 3rd triode Q3
Pole, the grid of the 3rd triode Q3 are grounded by the 5th resistance wire R11, and the drain electrode of the 3rd triode Q3 is by second and di- pole
Pipe circuit output.
Describe the operation principle of the present invention below in conjunction with the accompanying drawings in detail：
Accompanying drawing 2 is referred to, handover module free of discontinuities is set up between PLC power supply units and UPS and is constituted the switching free of discontinuities of the first weight
Power supply, the input of handover module free of discontinuities are connected with UPS output ends, and output end and the PLC of handover module free of discontinuities power
System input connects, and the input of handover module free of discontinuities is also directly connected to the outer power supply sources of 220V.Power supply Jing air breaks
Device Jing current transformers sensed current signal after logic judgment Jing solid-state relay, Jing fuse W to PLC electrical equipments.
The switching time of handover module free of discontinuities is 4-5 milliseconds.
Under normal conditions, city's power supply source Jing uninterruption power sources（UPS）, output end is connected to switching mould free of discontinuities
Block.Stable alternating current 220V power supply is exported by handover module free of discontinuities.At the same time, the input of handover module free of discontinuities is also
Connection city's power supply source is used as stand-by power supply.When UPS hardware catastrophic failures lead to not power supply, handover module detection free of discontinuities
To after dead electricity signal, stand-by power supply can be automatically switched in 4-5 milliseconds, it is ensured that the seamless switching of PLC electric power systems, PLC set
Standby continuous and steady operation.The switching time of handover module free of discontinuities is 4-5 milliseconds, main two electric capacity different by capacity
Discharge time difference realizing, measure the on or off time of two electric capacity respectively with oscillograph, draw the electric discharge of two electric capacity
Time difference be 4-5 milliseconds, the switching time of handover module as free of discontinuities.
In the case of the conventional power supplys of UPS and 220V two power supplys of outer power supply source, it is intended that UPS position of source, its operation
Program is by handover module automatic conversion free of discontinuities；If UPS power supplys are detected deviation occurs, will load from UPS automatically
Conventional Power convert is to the outer power supply sources of 220V；If UPS power ups are normal, load is returned into changing-over automatically normal to UPS
Use power supply.The change of detected power supply characteristic, when power supply characteristic deviates prescribed limits（It is improper such as supply voltage or frequency
Change）When, the power supply drift being detected will send signal and make change-over switch action；Actuation time accomplishes≤5ms. ensures negative
Carry power supply uninterrupted.
City's power supply source and UPS out-put supplies are respectively connecting to the terminal for being input into 1 and input 2, the air break of Jing two-way
After device, the break-make of power supply main line and UPS main lines is controlled by switch control unit, be input into 1 power supply Jing solid-states after
The shut-off of 3 control input 1 of electrical equipment 1 and solid-state relay, is input into 2 power supply Jing solid-state relays 2 and solid-state relay 4
The shut-off of control input 2.In the judgement through current transformer, two-way input source is only turned on all the way, free of discontinuities so as to reach
The purpose of switching.
Afterwards, the output all the way then after output control unit is to selection is controlled output.First disconnecting link or second
Disconnecting link is closed, the conducting of KM1 or KM2 contactors, Jing fuses after the normally opened of KM1 or KM2, the conversion of normally-closed contact generating state
After W, then Jing output ports are connected to instantaneous voltage stabilizing supply module, are then forwarded to electrical equipment for which and provide continuous power supply electricity
Source.
The electric energy that handover module free of discontinuities is mainly sended over by the effect of instantaneous voltage stabilizing supply module is carried out again
Stablize.In due to line voltage shutdown process unexpected again, the voltage that invariably accompanies is fluctuated, unstable, so as to damage
Equipment, so, carry out rectification, step-down, stablize using instantaneous voltage stabilizing supply module.
Voltage stabilizing power supplying circuit operation principle：During normal work, Zener diode D1, D2, D3 are being set supply voltage stable
Below the maximum output voltage value of standby setting, when the voltage entered from the first terminal 1 is higher than Zener diode D1, D2, D3 highest
During upper voltage limit, Zener diode punctures, and electric current increases rapidly, and the first fuse F1F1 moments fused, and disconnected circuit, reached
Dangerous voltage is limited into the effect of PCL.In the selection of components and parts, during Zener diode normal work, power should be in its volume
Determine less than the 2/3 of power, that is to say, that Zener diode power rating should be at least 1.7In（Specified electricity of the In for fuse
Stream）The highest Zener voltage for being multiplied by Zener diode is multiplied by 1.5 times again, and generally serial from 1N, its single tube rated power is
5W.In circuit, the time-current characteristic of fuse should ensure that the transient state rated value less than Zener diode, and it is in 250V electrical networks
Prospective current be considered as 1500A, the breaking capacity of fuse should be not less than the prospective current, generally select the U.S.
The ceramic fuse W such as littlefuse（That is fuse）If selecting general glass fuse W, need to be with the metal of 10 ohm of 1w
Film resistor limits prospective current.
As a example by dual flow-restriction is for primary circuit flow-restriction, during normal circuit operation, electric current I is by for circuit voltage stabilizing
Unit comes, and flows into after flowing through the first sample resistance R1, the first triode Q9, the second sample resistance R2, the first FET Q2
In next unit, now the first diode D24, the second diode D25 and the second triode Q10 are not turned on, when electric current I exceedes
When the maximum output current value of equipment setting flows through the first sample resistance R1, the first sample resistance R1 both end voltages add the one or three
The Ueb voltages sum of pole pipe Q9 is more than 1.4V, and now the first diode of quick on-off D24, the second diode D25 are turned on rapidly,
High current is switched to the first diode D24, the second diode D25, first resistor R15 by original path and flows into the earth, if
When first diode D24, the second diode D25 are not turned on, electric current I continues to raise, when it flows through the second sample resistance R2R2 two
Side pressure drop can then exceed 0.7V, then the second triode Q10 is turned on rapidly, and the second triode Q10 enters saturation with electric current increase
State, now between the colelctor electrode and emitter-base bandgap grading of the second triode Q10, voltage drops to 0.3V, then the first FET Q2 shut-offs,
Circuit disconnects, and plays a part of to prevent dangerous high current from flowing into.For circuit secondary flow-restriction circuit structure with supply primary circuit
Flow-restriction circuit structure is identical, will not be described here.
Excessively stream buffer cell is made up of solid-state inductance L devices L and two sustained diodes 32, D33, and it is to buffer limit
In stream unit, FET and the electric current increased in the triode reaction time, make its peak value step-down, are conducive to normal operation.Just
When often operating, the unit can play good buffer current effect.
Finally, prevent PLC power-off from not working, the electric energy that instantaneous voltage stabilizing supply module is sent is being marked as reference power supply
Switch between quasi- power supply and stand-by power supply.
As shown in Fig. 4,2 tunnel power inputs are had, be+24V-IN (reference power supply), stand-by power supply respectively, as+24V-IN
When supply voltage is normal, on POWER-IN-BUS, there is power supply, directly can be powered by Switching Power Supply.Simultaneously because NPN tri-
The base stage high voltage of pole pipe Q6, Q6 conducting, cause PNP triode Q5 base stage be low-voltage, Q5 conducting, cause Q3's
VGS is almost nil, Q3 cut-offs, is achieved that the purpose of stand-by power supply cut-out.
In the case that+24V-IN power supplys are not powered, start stand-by power supply, stand-by power supply signal is set to low level,
The base stage low-voltage of NPN triode Q6, Q6 cut-off, cause PNP triode Q5 base stage be high voltage, Q5 cut-off, lead
The VGS conductings of Q3 are caused, the purpose that stand-by power supply is powered is achieved that；
When backup power source voltage is all low, stand-by power supply control signal is set to high level, stand-by power supply is cut off, prevent battery
Overdischarge, acts the purpose for reaching protection battery.
Claims (9)
1. a kind of dual switching electric supply installation free of discontinuities, it is characterised in that：Including power supply, UPS and PLC device, power supply electricity
The feeder ear in source is powered for PLC device by UPS, it is characterised in that：Also include that handover module free of discontinuities, instantaneous voltage stabilizing are powered mould
Block, stand-by power supply handover module and stand-by power supply, the power port that connects of handover module free of discontinuities connect the defeated of power supply and UPS respectively
Power port, the transmission of electricity mouth of handover module free of discontinuities connect instantaneous voltage stabilizing supply module, and the power port that connects of stand-by power supply handover module is distinguished
Connect instantaneous voltage stabilizing supply module and stand-by power supply, the transmission of electricity mouth connection PLC device of stand-by power supply handover module.
2. dual switching according to claim 1 electric supply installation free of discontinuities, it is characterised in that：Described switching mould free of discontinuities
Block includes power supply main line, UPS main lines, switch control unit and output control unit, power supply main line and UPS
An air-break is respectively arranged in the supply line of main line；Described switch control unit includes the first solid-state relay
Device, the second solid-state relay, the 3rd solid-state relay, the 4th solid-state relay summation current transformer, the first solid-state relay and
The first end of the 3rd solid-state relay is connected on the live wire and zero line of power supply main line, the second solid-state relay and
The first end of the 4th solid-state relay is connected on the live wire and zero line of UPS main lines, the first solid-state relay and second
Second end of solid-state relay is connected to output control unit through current mutual inductor coil, and the 3rd solid-state relay and the 4th is admittedly
Second end of state relay is connected to output control unit, and current transformer is connected respectively to the first solid-state by Intelligent current table
Second end at second end and the 3rd solid-state relay and the 4th solid-state relay of relay and the second solid-state relay；Described
Output control unit includes the first control relay, the second control relay and outlet line, and the first control relay coil leads to
Cross the first disconnecting link and be serially connected with power supply main line, the second control relay coil is serially connected with UPS main lines by the second disconnecting link,
Be sequentially provided with power supply main line two normally opened contacts of the first control relay, two of the first control relay it is normally closed
Contact and two normally-closed contacts of the second control relay, two normally opened contacts of the second control relay are respectively arranged on UPS master
On the live wire and zero line of circuit, the static contact of two normally opened contacts of the second control relay connects the first control relay respectively
Two normally-closed contacts close between two normally-closed contacts of the second control relays, two normally-closed contacts of the second control relay
Static contact connect the second end and the 3rd solid-state relay and the 4th of the first solid-state relay and the second solid-state relay respectively
Second end of solid-state relay, normally closed touches at two of two normally opened contacts and the first control relay of the first control relay
Connect outlet line between point, and outlet line is provided with fuse.
3. dual switching according to claim 1 electric supply installation free of discontinuities, it is characterised in that：Described instantaneous voltage stabilizing is powered
Module includes rectification module, voltage changing module, voltage regulation unit, dual flow-restriction and excessively stream buffer cell, and rectification module connection is defeated
Go out output end, the rectification module connection voltage changing module of circuit, voltage changing module connection voltage regulation unit, the output end connection of voltage regulation unit
The input of dual flow-restriction, the output end of dual flow-restriction connect the input of excessively stream buffer cell, and excessively stream buffering is single
The output end of pressure-stabilizing connection stand-by power supply handover module of unit.
4. dual switching according to claim 1 electric supply installation free of discontinuities, it is characterised in that：Described stand-by power supply switching
Module includes power supply mu balanced circuit and stand-by power supply power supply circuits, the power interface connection excessively stream of power supply mu balanced circuit
The output end of pressure-stabilizing of buffer cell, the power interface connection stand-by power supply of stand-by power supply power supply circuits.
5. dual switching according to claim 3 electric supply installation free of discontinuities, it is characterised in that：Described voltage regulation unit includes
First fuse, the first end connection power supply of the first fuse, the second end connects the moon of three Zener diodes in parallel
Pole, the plus earth of three Zener diodes in parallel.
6. dual switching according to claim 3 electric supply installation free of discontinuities, it is characterised in that：Described dual flow-restriction
Including primary flow-restriction and secondary flow-restriction, primary flow-restriction includes the first sample resistance, the of the first sample resistance
Second end of the first fuse of one end connection, the emitter stage of first triode of the second end connection of the first sample resistance, the one or three
The base stage of pole pipe is grounded by first resistor, the first diode and the second Diode series, the anode connection of the first diode the
The first end of one sample resistance, the negative electrode of the second diode connect the base stage of the first triode, and the colelctor electrode of the first triode leads to
The grid that the second sample resistance connects the first FET is crossed, the source electrode of the first FET is grounded by second resistance, second
The base stage of triode connects the second end of the second sample resistance, the emitter stage connection the one or three of the second triode by 3rd resistor
The colelctor electrode of pole pipe, the colelctor electrode of the second triode connect the source electrode of the first FET；Secondary flow-restriction circuit structure with
Primary flow-restriction circuit structure is identical.
7. dual switching according to claim 3 electric supply installation free of discontinuities, it is characterised in that：Described excessively stream buffer cell
Including inductance, the output end of the secondary flow-restriction of first end connection of inductance, two fly-wheel diodes of inductance in parallel, the of inductance
Two ends are used as output end of pressure-stabilizing.
8. dual switching according to claim 4 electric supply installation free of discontinuities, it is characterised in that：Described power supply voltage stabilizing
Circuit includes the first parallel diode circuit.
9. dual switching according to claim 4 electric supply installation free of discontinuities, it is characterised in that：Described stand-by power supply is powered
Circuit includes the first triode, the second triode and the 3rd triode, and the base stage of the first triode is connected by first resistor silk
The negative pole of the first diode, the positive pole connection stand-by power supply of the first diode, the emitter stage of the first triode once pass through second
Resistance wire, 3rd resistor silk and the second diode connection stand-by power supply, and the grounded emitter of the first triode, the first triode
Colelctor electrode connect the base stage of the second triode by the 4th resistance wire, the emitter stage of the second triode connect by the 5th resistance wire
Ground, the colelctor electrode of the second triode connect the source electrode of the 3rd triode, and the grid of the 3rd triode is grounded by the 5th resistance wire,
The drain electrode of the 3rd triode passes through the second parallel diode circuit output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611065897.1A CN106532914A (en) | 2016-11-28 | 2016-11-28 | Dual-switching uninterrupted power supply device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611065897.1A CN106532914A (en) | 2016-11-28 | 2016-11-28 | Dual-switching uninterrupted power supply device |
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| CN106532914A true CN106532914A (en) | 2017-03-22 |
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| CN201611065897.1A Pending CN106532914A (en) | 2016-11-28 | 2016-11-28 | Dual-switching uninterrupted power supply device |
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| CN111030287A (en) * | 2019-12-23 | 2020-04-17 | 广州市科士达电源设备有限公司 | UPS uninterrupted power source system |
| CN112491115A (en) * | 2020-11-25 | 2021-03-12 | 四川长虹电器股份有限公司 | Power supply management circuit for standby rechargeable battery |
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