CN110061560A - Off-line type uninterruptible power supply and its control method - Google Patents
Off-line type uninterruptible power supply and its control method Download PDFInfo
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- CN110061560A CN110061560A CN201910440028.XA CN201910440028A CN110061560A CN 110061560 A CN110061560 A CN 110061560A CN 201910440028 A CN201910440028 A CN 201910440028A CN 110061560 A CN110061560 A CN 110061560A
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- switch
- controls
- transformer
- rechargeable battery
- power supply
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- 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
- H02J9/062—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 AC powered loads
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The present invention provides a kind of off-line type uninterruptible power supply and its control method, the off-line type uninterruptible power supply includes: the safety switch being connected between ac input end and ac output end；Transformer, one end of primary side are connected to a terminal of the ac output end；Sequentially connected first switch, second switch and output switch between the safety switch and another terminal of the ac output end, the first switch operationally make the safety switch be connected to the transformer primary side the other end and one of tap, the second switch operationally make the output switch be connected to the transformer primary side the other end and one of tap；Third switch, operationally makes the safety switch be connected to one of another terminal of the first switch and ac output end；And reversible transducer.Off-line type uninterruptible power supply of the invention electric energy efficiency of transmission with higher.
Description
Technical field
The present invention relates to field of electronic circuitry, and in particular to a kind of off-line type uninterruptible power supply and its control method.
Background technique
Off-line type uninterruptible power supply, is directly powered to the load by alternating current when line voltage is normal, and at rechargeable battery
In charged state；When line voltage is abnormal or has a power failure, inverter is switched to working condition, by the direct current in rechargeable battery
Be converted to stable exchange electricity output；When line voltage is relatively low or higher, the transformer of ac input end is connected to for adjusting
The voltage of alternating current is saved, so that ac output end has stable output voltage.
Fig. 1 is a kind of circuit diagram of off-line type uninterruptible power supply in the prior art.As shown in Figure 1, off-line type is uninterrupted
Power supply 1 includes Electro Magnetic Compatibility (EMC) filter 11 connected between its ac input end 10 and ac output end 10 '；Peace
Full switch 12, be configured to double-pole single-throw (D.P.S.T.) relay or including at the same switching safety switch unit 121 and safety switch list
Member 122；Sequentially connected first switch 131, second switch 132 between safety switch 12 and the terminal L of ac output end 10 '
With output switch 14；One end T1 of transformer Tr1, the primary side of transformer Tr1 are connected to safety switch 12 and ac output end
Between 10 ' terminal N, wherein first switch 131 operationally makes safety switch 12 be connected to the primary side of transformer Tr1
One of other end T2 and tap T3, second switch 132 operationally to export the primary side that switch 14 is connected to transformer Tr1
Other end T2 and one of tap T3；And rechargeable battery 16, reversible transducer 15 and auxiliary power supply system 17, chargeable electricity
Pond 16 is connected to the secondary side of transformer Tr1 by reversible transducer 15, and the input terminal of auxiliary power supply system 17, which is connected to, to be filled
16 both ends of battery are used to provide various required voltages to off-line type uninterruptible power supply 1.Wherein for simplified electrical circuit diagram,
Fig. 1 is not shown for city's electric detection means of detection line voltage, the electricity of the charged state for detecting rechargeable battery 16
Pond detection device, and the working condition for controlling reversible transducer 15, and control safety switch 12, first switch 131,
The control device of the switch state of second switch 132 and output switch 14.
When line voltage is higher, off-line type uninterruptible power supply 1 is controlled as in automatic voltage reduction regulation mode,
In, safety switch 12 and output switch 14 are controlled as being connected, and first switch 131 is controlled as being connected to the one of transformer Tr1
The terminal T2 of secondary side, second switch 132 are controlled as being connected to the tap T3 of the primary side of transformer Tr1, thus exchange output
The alternating current for holding 10 ' output voltages to reduce.Simultaneously bi-directionally converter 15 is controlled as the alternating current of the secondary side of transformer Tr1
Direct current is converted to, to charge to rechargeable battery 16, and provides direct current to auxiliary power supply system 17.
When line voltage is relatively low, off-line type uninterruptible power supply 1 is controlled as the shaping modes that boost in automatic voltage,
In, safety switch 12 and output switch 14 are controlled as being connected, and first switch 131 is controlled as being connected to the one of transformer Tr1
The tap T3 of secondary side, second switch 132 are controlled as being connected to the terminal T2 of the primary side of transformer Tr1, thus exchange output
Hold the raised alternating current of 10 ' output voltages.Simultaneously bi-directionally converter 15 is controlled as the alternating current of the secondary side of transformer Tr1
Direct current is converted to, to charge to rechargeable battery 16, and provides direct current to auxiliary power supply system 17.
When line voltage abnormal (such as overtension) or power failure, off-line type uninterruptible power supply 1 is controlled as in electricity
Pool mode.Wherein, safety switch 12 is controlled as disconnecting, and output switch 14 is controlled as being connected, and second switch 132 is connected by control
It is connected to the terminal T2 of the primary side of transformer Tr1, reversible transducer 15 is controlled as work, by the direct current of rechargeable battery 16
Electricity is converted to alternating current, after transformer Tr1 transformation, obtains required alternating current in ac output end 10 '.Meanwhile it can fill
Battery 16 provides direct current to auxiliary power supply system 17.
When line voltage in the normal range when, off-line type uninterruptible power supply 1 is controlled as in normal mode.Safety open
It closes 12 and exports switch 14 and be controlled as being connected, first switch 131 and second switch 132 are controlled as being connected to transformer
The terminal T2 of the primary side of Tr1.Simultaneously bi-directionally converter 15 is controlled as being converted in the alternating current of the secondary side of transformer Tr1
Direct current to charge to rechargeable battery 16, and provides direct current to auxiliary power supply system 17.
Fig. 2 is that off-line type uninterruptible power supply shown in FIG. 1 is equivalent after rechargeable battery is fully charged in the normal mode
Circuit diagram.As shown in Fig. 2, the alternating current of ac input end 10 passes through EMC filter 11, and the safety switch 12, first of conducting
Ac output end 10 ' is transmitted to after switch 131, second switch 132 and output switch 14.On the one hand, safety switch 12 with exchange
The contact of 3 switches between the terminal L of output end 10 ' reduces electric energy efficiency.On the other hand, the primary side of transformer Tr1 with
Ac output end 10 ' is electrically connected, therefore transformer Tr1 has biggish no-load loss.Furthermore transformer Tr1 works always, and
Reversible transducer 15 is controlled as working always, and floating charge electricity condition is constantly in after rechargeable battery 16 is fully charged.When chargeable
When battery 16 is constantly in floating charge electricity condition, the positive plate of rechargeable battery 16 can be inactivated, and generate a large amount of PbSO4And it is absorbed
Onto negative plate.This will lead to its activity and reduces, and internal resistance increases, and then the capacity of rechargeable battery 16 will fall rapidly upon, the longevity
Life will greatly reduce.
Summary of the invention
For above-mentioned technical problem of the existing technology, the present invention provides a kind of off-line type uninterruptible power supplies, comprising:
The safety switch being connected between ac input end and ac output end；
Transformer, one end of primary side are connected to a terminal of the ac output end；
Sequentially connected first switch, second between the safety switch and another terminal of the ac output end
Switch and output switch, the first switch operationally make the safety switch be connected to the primary side of the transformer
One of the other end and tap, the second switch operationally make the output switch the primary side for being connected to the transformer
The other end and one of tap；
Third switch, operationally makes the safety switch be connected to the another of the first switch and ac output end
One of one terminal；And
The alternating current of the secondary side of the transformer is controllably converted to direct current to chargeable by reversible transducer
Battery charges, and the direct current of the rechargeable battery is converted to alternating current.
Preferably, the off-line type uninterruptible power supply further include:
Charger, input terminal are connected to the ac input end, and controllably by the alternating current of the ac input end
Be converted to direct current；And
Auxiliary power supply system, input terminal are connected to the output end of the charger.
Preferably, the third switch includes:
The public terminal being connect with the safety switch；
The first switched terminal being connected between the output switch and another terminal of the ac output end；And
It is connected to the second switched terminal of the first switch.
Preferably, the output end of the charger is connected to the both ends of the rechargeable battery.
Preferably, the off-line type uninterruptible power supply further includes diode, and anode is connected to the rechargeable battery
Anode, cathode are connected to the positive terminal of the output end of the charger.
Preferably, the output power of the charger is less than the maximum charge power of the rechargeable battery, and described fills
The output voltage of electric appliance is greater than the voltage at the rechargeable battery both ends.
Preferably, the off-line type uninterruptible power supply further include:
City's electric detection means is configured as detecting the line voltage of the ac output end；
Battery check device is configured as detecting the charged state of the rechargeable battery；And
Control device is configured as according to the control of the charged state of the line voltage and the rechargeable battery
The working condition of charger and reversible transducer, and the control safety switch, first switch, second switch, third switch
With the switch state of output switch.
Preferably, when first threshold voltage≤line voltage < second threshold voltage, the control device control
The safety switch conducting controls the third switch and is connected to the first switch, controls the first switch and be connected to institute
The tap for stating the primary side of transformer controls the other end that the second switch is connected to the primary side of the transformer, control
The output switch conduction；Wherein, when it is described can electric battery be not fully charged when, the control device controls the charger and stops
It only works, and controls reversible transducer and the alternating current of the secondary side of the transformer is converted into direct current；And it can described in
When rechargeable battery is fully charged, the control device controls the reversible transducer and stops working, and controls the charger for institute
The alternating current for stating ac input end is converted to direct current.
Preferably, when second threshold voltage≤line voltage < third threshold voltage, the control device control
The safety switch conducting；Wherein, when the rechargeable battery is not fully charged, the control device controls the third and opens
Connection be connected to the first switch, control the first switch and the second switch be connected to the transformer primary side it is another
End, controls the output switch conduction, controls the reversible transducer to convert the alternating current of the secondary side of the transformer
For direct current；When the rechargeable battery is fully charged, the control device controls the third switch and is connected to the exchange
Another terminal of output end controls the output switch and disconnects, controls the reversible transducer and stop working, fill described in control
Electric appliance is to be converted to direct current for the alternating current of the ac input end.
Preferably, when the third threshold voltage≤line voltage four threshold voltage of <, the control device control
The safety switch conducting controls the third switch and is connected to the first switch, controls the first switch and be connected to institute
The other end for stating the primary side of transformer controls the tap that the second switch is connected to the primary side of the transformer, and controls
Make the output switch conduction；Wherein, when the rechargeable battery is not fully charged, the control device controls the charging
Device stops working, and controls the reversible transducer for the alternating current of the secondary side of the transformer and is converted to direct current；When described
When rechargeable battery is fully charged, the control device controls the reversible transducer and stops working, and controlling the charger will
The alternating current of the ac input end is converted to direct current.
Preferably, when the line voltage < first threshold voltage or >=four threshold voltage, the control device control
It makes the safety switch to disconnect, control second switch is connected to the other end of the primary side of the transformer, controls the output
Switch conduction controls the reversible transducer so that the direct current of the rechargeable battery is converted to alternating current.
The present invention also provides a kind of control methods for above-mentioned off-line type uninterruptible power supply, including the following steps: inspection
Survey the line voltage of the ac output end and the charged state of the rechargeable battery, according to the line voltage and it is described can
The charged state of rechargeable battery controls the working condition of the charger and reversible transducer, and the control safety switch,
The switch state of first switch, second switch, third switch and output switch.
Preferably, when first threshold voltage≤line voltage < second threshold voltage, the safety switch is controlled
Conducting controls the third switch and is connected to the first switch, controls the first switch is connected to the transformer one
The tap of secondary side controls the other end that the second switch is connected to the primary side of the transformer, controls the output switch
Conducting；Wherein, when it is described can electric battery be not fully charged when, control the charger and stop working, and control reversible transducer
The alternating current of the secondary side of the transformer is converted into direct current；And when the rechargeable battery is fully charged, institute is controlled
It states reversible transducer to stop working, and controls the charger and the alternating current of the ac input end is converted into direct current.
Preferably, when second threshold voltage≤line voltage < third threshold voltage, the safety switch is controlled
Conducting；Wherein, it when the rechargeable battery is not fully charged, controls the third switch and is connected to the first switch, control
The other end that the first switch and the second switch is connected to the primary side of the transformer is made, the output switch is controlled and leads
It is logical, the reversible transducer is controlled so that the alternating current of the secondary side of the transformer is converted to direct current；When described chargeable
When battery is fully charged, another terminal that the third switch is connected to the ac output end is controlled, the output is controlled and opens
Shutdown is opened, and is controlled the reversible transducer and is stopped working, and controls the charger to turn the alternating current of the ac input end
It is changed to direct current.
Preferably, when the third threshold voltage≤line voltage four threshold voltage of <, the safety switch is controlled
Conducting controls the third switch and is connected to the first switch, controls the first switch is connected to the transformer one
The other end of secondary side controls the tap that the second switch is connected to the primary side of the transformer, and controls the output and open
Close conducting；Wherein, it when the rechargeable battery is not fully charged, controls the charger and stops working, control described two-way
The alternating current of the secondary side of the transformer is converted to direct current by converter；When the rechargeable battery is fully charged, control
The reversible transducer stops working, and controls the charger and the alternating current of the ac input end is converted to direct current.
Preferably, when the line voltage < first threshold voltage or >=four threshold voltage, the safety open is controlled
Shutdown is opened, and control second switch is connected to the other end of the primary side of the transformer, controls the output switch conduction, is controlled
The reversible transducer is to be converted to alternating current for the direct current of the rechargeable battery.
Off-line type uninterruptible power supply of the invention electric energy efficiency of transmission with higher, can be realized no start battery, can
To select small charger, the cost of charger is reduced, additionally it is possible to avoid rechargeable battery from being in floating charge electricity condition, and extend
The service life of rechargeable battery and the cost for reducing rechargeable battery.
Detailed description of the invention
Embodiments of the present invention is further illustrated referring to the drawings, in which:
Fig. 1 is a kind of circuit diagram of off-line type uninterruptible power supply in the prior art.
Fig. 2 is that off-line type uninterruptible power supply shown in FIG. 1 is equivalent after rechargeable battery is fully charged in the normal mode
Circuit diagram.
Fig. 3 is the circuit diagram of the off-line type uninterruptible power supply of one embodiment according to the present invention.
Fig. 4 is that off-line type uninterruptible power supply shown in Fig. 3 is equivalent after rechargeable battery is fully charged in the normal mode
Circuit diagram.
Fig. 5 is the circuit diagram of the off-line type uninterruptible power supply of second embodiment according to the present invention.
Fig. 6 is that off-line type uninterruptible power supply shown in fig. 5 is equivalent after rechargeable battery is fully charged in the normal mode
Circuit diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, pass through below in conjunction with attached drawing specific real
Applying example, the present invention is described in more detail.
Fig. 3 is the circuit diagram of the off-line type uninterruptible power supply of one embodiment according to the present invention.As shown in figure 3, its with
Fig. 1 is essentially identical, and difference is, off-line type uninterruptible power supply 2 further includes charger 28 and third switch 29.Third switch 29 wraps
Include the public terminal connecting with the second safety switch unit 222 of safety switch 22, be connected electrically in output switch 24 with exchange it is defeated
The first switched terminal S1 between the terminal L of outlet 20 ', and the second switching being connect with the public terminal of first switch 231
Terminal S2.Third switch 29 operationally makes safety switch 22 be connected to the terminal of first switch 231 and ac output end 20 '
One of L, safety switch 22 is for realizing feedback protection function.The input terminal of charger 28 is connected to ac input end 20, output
End is connected to the input terminal of auxiliary power supply system 27.Wherein for simplified electrical circuit diagram, Fig. 3 is equally not shown for detecting alternating current electricity
City's electric detection means of pressure, for detecting the battery check device and control device of the charged state of rechargeable battery 26,
For controlling the working condition of charger 28 and reversible transducer 25, and control safety switch 22, first switch 231, second
The control device of the switch state of switch 232, third switch 29 and output switch 24.
The operating mode of briefing off-line type uninterruptible power supply 2 will be divided below.
(1) when line voltage in the normal range when, off-line type uninterruptible power supply 2 is controlled as in normal mode.Its
In, safety switch 22 (i.e. the first safety switch unit 221 and the second safety switch unit 222) is controlled as being connected.If can
Rechargeable battery 26 is not fully charged, and the public terminal of control third switch 29 is connect with the second switched terminal S2 (i.e. so that third
Switch 29 is connected to first switch 231), first switch 231 and second switch 232 are controlled as being connected to transformer Tr2's
The terminal T22 of primary side, and output switch 24 are controlled as being connected, and it is defeated that the alternating current of ac input end 20 will be transmitted to exchange
Outlet 20 '.Simultaneously bi-directionally converter 25 is controlled as the alternating current of the secondary side of transformer Tr2 being converted to direct current, with right
Rechargeable battery 26 carries out quick charge, and provides direct current to auxiliary power supply system 27.
If rechargeable battery 26 is fully charged, third switch 29 is controlled as that its public terminal is made to be connected to first at this time
Switched terminal S1 (i.e. third switch 29 be connected to ac output end 20 ' terminal L), output switch 24 is controlled as disconnecting, double
It is controlled as stopping charging to rechargeable battery 26 to converter 25, while charger 28 is controlled as ac input end 20
Alternating current is converted to direct current, to charge to rechargeable battery 26, and required direct current is provided to auxiliary power supply system 27.Figure
4 be equivalent circuit diagram of the off-line type uninterruptible power supply shown in Fig. 3 after rechargeable battery is fully charged in the normal mode.Fig. 4
Shown in equivalent circuit compared with equivalent circuit shown in Fig. 2 known to: first, the primary side of transformer Tr2 is simultaneously not attached to electricity
Lu Zhong, therefore transformer noload losses is not present, and reversible transducer 25 stops working.Second, safety switch 22 passes through third
Switch 29 is connected directly to the terminal L of ac output end 20 ', reduces the contact loss of 2 switches.Third, third switch 29
It in normally off, and exports switch 24 and is in normally open, therefore reduce and export the electromagnetic coil of switch 24 (Fig. 3 does not show
It is lost out).Inventor tests in identical condition, and the electric energy efficiency of transmission of equivalent circuit shown in Fig. 2 is 95.62%,
The electric energy efficiency of transmission of equivalent circuit shown in Fig. 4 has been increased to 98.75%, therefore improves electric energy efficiency of transmission, thus full
The Energy Star Valuation Standard that sufficient Environmental Protection Agency USA and Ministry of Energy implement.
(2) when line voltage is higher, off-line type uninterruptible power supply 2 is controlled as in automatic voltage reduction regulation mould
Formula.Wherein, safety switch 22 is controlled as being connected, and third switch 29 is controlled as that its public terminal is made to be connected to the second switch terminal
Sub- S2 (i.e. third switch 29 is connected to first switch 231), first switch 231 are controlled as being connected to the primary of transformer Tr2
The terminal T22 of side, second switch 232 is controlled as being connected to the tap T23 of the primary side of transformer Tr2, and exports switch 24
It is controlled as being connected.
Wherein, if rechargeable battery 26 is not fully charged, charger 28 stops working, and reversible transducer 25 is controlled as
The alternating current of the secondary side of transformer Tr2 is converted into direct current, to carry out quick charge to rechargeable battery 26, and to auxiliary
Power supply system 27 provides direct current.
If rechargeable battery 26 has been filled with electricity, reversible transducer 25 stops working, and charger 28 is controlled as to hand over
The alternating current of stream input terminal 20 is converted to direct current, to charge to rechargeable battery 26, and mentions to auxiliary power supply system 27
For required direct current.
(3) when line voltage is relatively low, off-line type uninterruptible power supply 2 is controlled as adjusting mould in automatic voltage boosting
Formula.Wherein, safety switch 22 is controlled as being connected, and third switch 29 is controlled as that its public terminal is made to be connected to the second switch terminal
Sub- S2 (the second safety switch unit 222 is connected to first switch 231), first switch 231 is controlled as being connected to transformation
The tap T23 of the primary side of device Tr2, second switch 232 are controlled as being connected to the terminal T22 of the primary side of transformer Tr2, and
Output switch 24 is controlled as being connected.
If rechargeable battery 26 is not fully charged, charger 28 stops working, and reversible transducer 25 is controlled as to become
The alternating current of the secondary side of depressor Tr2 is converted to direct current, to carry out quick charge to rechargeable battery 26, and gives auxiliary power supply
System 27 provides direct current.
If rechargeable battery 26 has been filled with electricity, reversible transducer 25 stops working, and charger 28 is controlled as to hand over
The alternating current of stream input terminal 20 is converted to direct current, to charge to rechargeable battery 26, and mentions to auxiliary power supply system 27
For required direct current.
(4) when line voltage is abnormal or has a power failure, off-line type uninterruptible power supply 2 is controlled as in battery mode, wherein
Safety switch 22 is controlled as disconnecting, and second switch 232 is controlled as being connected to the terminal T22 of the primary side of transformer Tr2, and
Output switch 24 is controlled as being connected, and simultaneously bi-directionally converter 25 is controlled as the direct current of rechargeable battery 26 being converted to friendship
Galvanic electricity, after transformer Tr2 transformation, to obtain required alternating current in ac output end 20 '.Rechargeable battery 26 simultaneously
Direct current is provided to auxiliary power supply system 27.
If off-line type uninterruptible power supply 2 is on startup, there is no connect rechargeable battery 26 or rechargeable battery 26
Electric energy can not be provided, since the input terminal of charger 28 is connected to ac input end 20, charger 28 is started to work and given
Auxiliary power supply system 27 provides electric energy, so that off-line type uninterruptible power supply 2 is started to work.It follows that off-line type is uninterruptedly electric
Source 2 realizes no start battery.
In conjunction with above-mentioned operating mode it is found that after rechargeable battery 26 is fully charged, charger 28 is controlled as work with right
Auxiliary power supply system 27 is powered.Since in uninterruptible power supply, the power of auxiliary power supply system 27 is much smaller than chargeable electricity
The maximum charge power in pond 26, therefore can choose small charger compatible with the power of auxiliary power supply system 27, that is, it fills
The output power of electric appliance 28 is less than the maximum charge power of rechargeable battery 26, to reduce the cost of circuit.
In the normal mode, when rechargeable battery 26 is not fully charged, first switch 231 and second switch 232 are controlled
It is made as being connected to the terminal T22 of the primary side of transformer Tr2, thus whole windings electrical connection of the primary side of transformer Tr2
To ac input end 20, transformer Tr2 can be effectively prevent to be saturated.
In battery mode, second switch 232 is controlled as being connected to the terminal T22 of the primary side of transformer Tr2, thus
Whole windings of the primary side of transformer Tr2 are electrically connected to ac output end 20 ', constant in the duty ratio of reversible transducer 25
In the case of, alternating voltage as big as possible can be obtained in ac output end 20 '.It is controlled as being connected to second switch 232
The tap T23 of the primary side of transformer Tr2 compares, and can choose the lesser rechargeable battery 26 of output voltage, thus reduces
The cost of rechargeable battery 26.
Fig. 5 is the circuit diagram of the off-line type uninterruptible power supply of second embodiment according to the present invention.Wherein Fig. 5 does not show equally
City's electric detection means, battery check device and control device out.As shown in figure 5, described in off-line type uninterruptible power supply 3 and Fig. 3
Off-line type uninterruptible power supply 2 is essentially identical, and difference is, off-line type uninterruptible power supply 3 further includes being connected to rechargeable battery 36
Anode and charger 38 output end positive terminal between diode D3, wherein the anode of diode D3, which is connected to, to fill
The anode of battery 36, cathode are connected to the positive terminal of the output end of charger 38.
The operating mode of briefing off-line type uninterruptible power supply 3 will be divided below.
(1) when line voltage in the normal range when, the control method phase of control method and off-line type uninterruptible power supply 2
Together, it is not repeated herein.Fig. 6 is that rechargeable battery is filled off-line type uninterruptible power supply shown in fig. 5 in the normal mode
Equivalent circuit diagram after electricity.As shown in fig. 6, charger 38 is controlled as providing required direct current to auxiliary power supply system 37.
The charging voltage of charger 38 is greater than the voltage at 36 both ends of rechargeable battery, and rechargeable battery 36 can't be D3 pairs by diode
Auxiliary power supply system 37 is powered, and due to the reversed cutoff function of diode D3, charger 38 will not be filled to being in
The rechargeable battery 36 of full electricity continues to charge.Therefore rechargeable battery 36 is now in suspend mode, can extend use in this way
Service life.
(2) when line voltage is higher, control method is identical as the control method of off-line type uninterruptible power supply 2, herein
It is not repeated.It is in suspend mode after same rechargeable battery 36 is fully charged, can be prolonged the service life in this way.
(3) when line voltage is relatively low, control method is identical as the control method of off-line type uninterruptible power supply 2, herein
It is not repeated.It is in suspend mode after same rechargeable battery 36 is fully charged, can be prolonged the service life in this way.
(4) when line voltage is abnormal or has a power failure, the control method phase of control method and off-line type uninterruptible power supply 2
Together, it is not repeated herein.
In summary, after rechargeable battery 36 is fully charged, rechargeable battery 36 is filled in the stopping of reversible transducer 35
Electricity, while charger 38 starts to work and provides required direct current to auxiliary power supply system 37.It is reversed due to diode D3
Cutoff function, charger 38 can't charge to rechargeable battery 36 at this time.Further, it enables the output voltage of charger 38 is higher than
The voltage at 36 both ends of rechargeable battery, rechargeable battery 36 can't carry out auxiliary power supply system 37 by diode D3 at this time
Power supply.Rechargeable battery 36 was not both electrically charged, and was not also discharged, and is avoided and is constantly in floating charge electricity condition.
When needing to charge to rechargeable battery 36, reversible transducer 35 work with to rechargeable battery 36 promptly
Charging.After rechargeable battery 36 is fully charged, reversible transducer 35 stops working, and rechargeable battery 36 is automatically in suspend mode mould
Formula greatly extends the service life of rechargeable battery 36.
In other control methods of the invention, in normal mode or automatic voltage shaping modes, work as rechargeable battery
36 when not being fully charged, and charger 38 is controlled as working always, to provide auxiliary power supply system 37 required direct current.
In the above embodiment of the invention, reversible transducer can be using the single circuit module reality for realizing above-mentioned function
It applies, circuit module combination can also be used to implement, such as DC inversion at the circuit module of exchange and can be utilized friendship by selection
Galvanic electricity is reverse into the combination for the circuit module that direct current charges the battery, for example is inverter.
EMC filter is suitable for inhibiting noise and high-frequency harmonic caused by electric network noise and higher harmonics and Switching Power Supply,
Therefore in the application of less demanding to power quality, off-line type uninterruptible power supply can also not have EMC filter.?
In the other embodiment of the present invention, EMC filter by safety switch is connected to ac input end, and (i.e. safety switch is connected to friendship
It flows between input terminal and EMC filter).
Control method of the invention selects different operating modes based on the line voltage of ac input end.For example, working as
When line voltage < first threshold voltage, off-line type uninterruptible power supply is in battery mode；When first threshold voltage≤alternating current electricity
When pressing < second threshold voltage, off-line type uninterruptible power supply is in automatic voltage boosting shaping modes；When second threshold voltage≤
When line voltage < third threshold voltage, off-line type uninterruptible power supply is in normal mode；When third threshold voltage≤alternating current electricity
When pressing four threshold voltage of <, off-line type uninterruptible power supply is in automatic voltage reduction regulation mode；When the 4th threshold voltage≤
When line voltage, off-line type uninterruptible power supply is in battery mode.Control method of the invention is not intended to restriction first,
Two, third, the specific value of the 4th threshold voltage, but the electricity of permission is loaded according to the voltage rating size of alternating current by user
Deviation range and the turn ratio of transformer is pressed to select.Such as the load voltage value of alternating current is 220 volts, loads the electricity of permission
Pressing range is 200 volts~240 volts, the number of turns of the terminal T1 and tap T3 of the primary side of transformer Tr1 and terminal T1 and end
The ratio of the number of turns of sub- T2 be 5:6, then it is 167 volts that first threshold voltage, which can choose, second threshold voltage can choose for
200 volts, it is 240 volts that third threshold voltage, which can choose, and it is 288 volts that the 4th threshold voltage, which can choose,.
Although the present invention has been described by means of preferred embodiments, the present invention is not limited to described here
Embodiment, without departing from the present invention further include made various changes and variation.
Claims (13)
1. a kind of off-line type uninterruptible power supply characterized by comprising
The safety switch being connected between ac input end and ac output end；
Transformer, one end of primary side are connected to a terminal of the ac output end；
Sequentially connected first switch, second switch between the safety switch and another terminal of the ac output end
With output switch, the first switch operationally make the safety switch be connected to the transformer primary side it is another
One of end and tap, the second switch operationally make the output switch the another of the primary side for being connected to the transformer
One of one end and tap；
Third switch, operationally make the safety switch be connected to the first switch and ac output end another
One of terminal；And
The alternating current of the secondary side of the transformer is controllably converted to direct current to rechargeable battery by reversible transducer
It charges, and the direct current of the rechargeable battery is converted into alternating current.
2. off-line type uninterruptible power supply according to claim 1, which is characterized in that the off-line type uninterruptible power supply also wraps
It includes:
Charger, input terminal are connected to the ac input end, and controllably convert the alternating current of the ac input end
For direct current；And
Auxiliary power supply system, input terminal are connected to the output end of the charger.
3. off-line type uninterruptible power supply according to claim 2, which is characterized in that the third, which switchs, includes:
The public terminal being connect with the safety switch；
The first switched terminal being connected between the output switch and another terminal of the ac output end；And
It is connected to the second switched terminal of the first switch.
4. off-line type uninterruptible power supply according to claim 2, which is characterized in that the output end of the charger is connected to
The both ends of the rechargeable battery.
5. off-line type uninterruptible power supply according to claim 2, which is characterized in that the off-line type uninterruptible power supply also wraps
Diode is included, anode is connected to the anode of the rechargeable battery, and cathode is being connected to the output end of the charger just
Extreme son.
6. off-line type uninterruptible power supply according to claim 5, which is characterized in that the output power of the charger is less than
The maximum charge power of the rechargeable battery, and the output voltage of the charger is greater than the electricity at the rechargeable battery both ends
Pressure.
7. the off-line type uninterruptible power supply according to any one of claim 2 to 6, which is characterized in that the off-line type is not
Uninterruptible power further include:
City's electric detection means is configured as detecting the line voltage of the ac output end；
Battery check device is configured as detecting the charged state of the rechargeable battery；And
Control device is configured as controlling the charging according to the charged state of the line voltage and the rechargeable battery
The working condition of device and reversible transducer, and the control safety switch, first switch, second switch, third switch and defeated
The switch state switched out.
8. off-line type uninterruptible power supply according to claim 7, it is characterised in that:
When first threshold voltage≤line voltage < second threshold voltage, the control device controls the safety switch
Conducting controls the third switch and is connected to the first switch, controls the first switch is connected to the transformer one
The tap of secondary side controls the other end that the second switch is connected to the primary side of the transformer, controls the output switch
Conducting；Wherein, when it is described can electric battery be not fully charged when, the control device controls the charger and stops working, and controls
The alternating current of the secondary side of the transformer is converted to direct current by reversible transducer processed；And when the rechargeable battery is full of
When electric, the control device controls the reversible transducer and stops working, and controls the charger for the ac input end
Alternating current be converted to direct current；
When second threshold voltage≤line voltage < third threshold voltage, the control device controls the safety switch
Conducting；Wherein, when the rechargeable battery is not fully charged, the control device control third switch is connected to described
First switch, controls the other end that the first switch and the second switch is connected to the primary side of the transformer, described in control
Switch conduction is exported, controls the reversible transducer so that the alternating current of the secondary side of the transformer is converted to direct current；When
When the rechargeable battery is fully charged, the control device controls the third switch and is connected to the another of the ac output end
A terminal controls output switch and disconnects, controls the reversible transducer and stop working, control the charger with will described in
The alternating current of ac input end is converted to direct current；
When the third threshold voltage≤line voltage four threshold voltage of <, the control device controls the safety switch
Conducting controls the third switch and is connected to the first switch, controls the first switch is connected to the transformer one
The other end of secondary side controls the tap that the second switch is connected to the primary side of the transformer, and controls the output and open
Close conducting；Wherein, when the rechargeable battery is not fully charged, the control device controls the charger and stops working,
It controls the reversible transducer and the alternating current of the secondary side of the transformer is converted into direct current；When the rechargeable battery fills
When full electricity, the control device controls the reversible transducer and stops working, and controls the charger and input the exchange
The alternating current at end is converted to direct current；
Or when the line voltage < first threshold voltage or >=four threshold voltage, the control device controls the safety
Switch disconnects, and control second switch is connected to the other end of the primary side of the transformer, controls the output switch conduction, controls
The reversible transducer is made so that the direct current of the rechargeable battery is converted to alternating current.
9. a kind of control method for the off-line type uninterruptible power supply as described in any one of claim 2 to 6, feature exist
In, including the following steps: the line voltage of the ac output end and the charged state of the rechargeable battery are detected, according to institute
The charged state for stating line voltage and the rechargeable battery controls the working condition of the charger and reversible transducer, and
Control the switch state of the safety switch, first switch, second switch, third switch and output switch.
10. control method according to claim 9, which is characterized in that as first threshold voltage≤line voltage <
When second threshold voltage, the safety switch conducting is controlled, the third switch is controlled and is connected to the first switch, control institute
The tap that first switch is connected to the primary side of the transformer is stated, controls the second switch is connected to the transformer one
The other end of secondary side controls the output switch conduction；
Wherein, when it is described can electric battery be not fully charged when, control the charger and stop working, and controlling reversible transducer will
The alternating current of the secondary side of the transformer is converted to direct current；And
It when the rechargeable battery is fully charged, controls the reversible transducer and stops working, and control the charger for institute
The alternating current for stating ac input end is converted to direct current.
11. control method according to claim 9, which is characterized in that as second threshold voltage≤line voltage <
When third threshold voltage, the safety switch conducting is controlled；
Wherein, it when the rechargeable battery is not fully charged, controls the third switch and is connected to the first switch, control
The first switch and the second switch is connected to the other end of the primary side of the transformer, controls the output switch conduction,
The reversible transducer is controlled so that the alternating current of the secondary side of the transformer is converted to direct current；
When the rechargeable battery is fully charged, another end that the third switch is connected to the ac output end is controlled
Son controls output switch disconnection, controls the reversible transducer and stop working, and controls the charger with by the exchange
The alternating current of input terminal is converted to direct current.
12. control method according to claim 9, which is characterized in that as third threshold voltage≤line voltage <
When four threshold voltages, the safety switch conducting is controlled, the third switch is controlled and is connected to the first switch, control institute
The other end that first switch is connected to the primary side of the transformer is stated, the second switch is controlled and is connected to the transformer
The tap of primary side, and control the output switch conduction；
Wherein, it when the rechargeable battery is not fully charged, controls the charger and stops working, control the two-way changing
The alternating current of the secondary side of the transformer is converted to direct current by device；
It when the rechargeable battery is fully charged, controls the reversible transducer and stops working, and control the charger for institute
The alternating current for stating ac input end is converted to direct current.
13. control method according to claim 9, which is characterized in that when the line voltage < first threshold voltage or
It when the >=the four threshold voltage, controls the safety switch and disconnects, control second switch is connected to the primary side of the transformer
The other end controls the output switch conduction, controls the reversible transducer to convert the direct current of the rechargeable battery
For alternating current.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111490588A (en) * | 2020-04-02 | 2020-08-04 | 国网浙江省电力有限公司杭州供电公司 | Method for realizing mutual backup of communication power supply and operation power supply of transformer substation |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4246633A (en) * | 1979-02-09 | 1981-01-20 | General Signal Corporation | Voltage control circuitry for UPS |
| CN101976871A (en) * | 2010-10-22 | 2011-02-16 | 艾默生网络能源有限公司 | UPS (Uninterrupted Power Supply) power supply control circuit and UPS power supply |
| CN103368235A (en) * | 2013-07-30 | 2013-10-23 | 深圳市国耀电子科技有限公司 | Nickel-metal hydride battery charge-discharge circuit in uninterruptible power supply |
| CN104065157A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Uninterruptible power supply with improved power supply reliability |
| CN104953696A (en) * | 2014-03-27 | 2015-09-30 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | On-line interactive uninterrupted power source |
| CN105723587A (en) * | 2013-09-30 | 2016-06-29 | 施耐德电气It公司 | UPS for mixed AC and DC loads |
| US20170250546A1 (en) * | 2016-02-25 | 2017-08-31 | Fujitsu Limited | Power device, storage device and power device control method |
-
2019
- 2019-05-24 CN CN201910440028.XA patent/CN110061560B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4246633A (en) * | 1979-02-09 | 1981-01-20 | General Signal Corporation | Voltage control circuitry for UPS |
| CN101976871A (en) * | 2010-10-22 | 2011-02-16 | 艾默生网络能源有限公司 | UPS (Uninterrupted Power Supply) power supply control circuit and UPS power supply |
| CN103368235A (en) * | 2013-07-30 | 2013-10-23 | 深圳市国耀电子科技有限公司 | Nickel-metal hydride battery charge-discharge circuit in uninterruptible power supply |
| CN105723587A (en) * | 2013-09-30 | 2016-06-29 | 施耐德电气It公司 | UPS for mixed AC and DC loads |
| CN104953696A (en) * | 2014-03-27 | 2015-09-30 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | On-line interactive uninterrupted power source |
| CN104065157A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Uninterruptible power supply with improved power supply reliability |
| US20170250546A1 (en) * | 2016-02-25 | 2017-08-31 | Fujitsu Limited | Power device, storage device and power device control method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111490588A (en) * | 2020-04-02 | 2020-08-04 | 国网浙江省电力有限公司杭州供电公司 | Method for realizing mutual backup of communication power supply and operation power supply of transformer substation |
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| CN110061560B (en) | 2022-02-08 |
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