CN107809131A - Uninterrupted power source - Google Patents
Uninterrupted power source Download PDFInfo
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- CN107809131A CN107809131A CN201610805843.8A CN201610805843A CN107809131A CN 107809131 A CN107809131 A CN 107809131A CN 201610805843 A CN201610805843 A CN 201610805843A CN 107809131 A CN107809131 A CN 107809131A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 17
- 239000010703 silicon Substances 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 2
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 description 1
- 101150105073 SCR1 gene Proteins 0.000 description 1
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
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- H02J7/022—
-
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The present invention provides a kind of uninterrupted power source, including the pfc circuit being connected in turn between the input of the uninterrupted power source and output end, first electric capacity, second electric capacity and inverter, the pfc circuit includes inductance and AC/DC conversion modules, wherein, uninterrupted power source also includes charger circuit, the input of the charger circuit is connected to node and reference ground between the inductance and the AC/DC conversion modules, the both ends of the circuit for composition that the output end of the AC/DC conversion modules is connected to first electric capacity and second electric capacity is connected to each other and it is connected to the input of the inverter, node between first electric capacity and second electric capacity is connected to reference ground.The uninterrupted power source of the present invention has reused pfc circuit, has saved cost, has improved efficiency.
Description
Technical field
The invention belongs to field of switch power, more particularly to a kind of uninterrupted power source.
Background technology
Uninterrupted power source (UPS) is a kind of to uninterrupted, high-quality, the reliable AC energy of load offer, and with real-time
Protection and the power supply unit of monitoring power supply state function, have to improvement power supply quality, guarantee equipment normal operation important
Effect.
Charger is UPS significant components.When civil power input is normal, charger gives battery storage electric energy, and works as civil power
During interruption, UPS is immediately switched to battery mode and continued to run with.According to UPS power grade, cell voltage can be in larger scope
Interior change, different chargers topology are used to meet different design requirements.
Fig. 1 is a UPS circuit topology of prior art, wherein, the input of charger is connected directly to civil power input
End, in this case, charger circuit does not carry out power factor correcting, therefore the input power factor (PF) is very low, causes
Total harmonic distortion (THD) performance and electromagnetic compatibility (EMC) poor-performing of whole UPS circuits, especially when charger power is larger
When, power supply network harmonic pollution is more serious.Therefore, if it is desirable to the charger that power is larger, it is necessary to increase in charger topology
Add other power factor correcting (PFC) circuit, this undoubtedly can improve cost and increase the complexity of circuit.
Fig. 2 is another UPS circuit topology of prior art, wherein, the input of charger is connected to DC bus (AC/
The output of DC converters), in this case, charger circuit experience power factor correcting, charger capabilities do not influence such as
PF, THD and EMC input characteristics.But in general, DC bus has three lines, and positive DC bus, the neutral conductor and negative DC are female
Line.DC bus voltage is more than twice of civil power crest voltage, and for the UPS of different capacity grade, it does not have wide variable model
Enclose.In addition, due to cost considerations, general battery concatenation number is few, cell voltage for DC bus voltage very
It is low, when being used as charger using reduction voltage circuit, if DC bus inputs as charger, then the efficiency of reduction voltage circuit is very
It is low.If in addition, being inputted using the half (i.e. positive DC bus or negative DC bus) of DC bus as charger, DC bus can be caused
It is unbalance.
The content of the invention
Therefore, it is an object of the invention to overcome above-mentioned prior art the defects of, there is provided a kind of uninterrupted power source, including according to
The secondary pfc circuit being connected between the input of uninterrupted power source and output end, the first electric capacity, the second electric capacity and inverter, institute
Stating pfc circuit includes inductance and AC/DC conversion modules, wherein, uninterrupted power source also includes charger circuit, the charger electricity
The input on road is connected to node and reference ground between the inductance and the AC/DC conversion modules, and the AC/DC becomes mold changing
The both ends of the circuit for composition that the output end of block is connected to first electric capacity and second electric capacity is connected to each other and it is connected to
The input of the inverter, the node between first electric capacity and second electric capacity are connected to reference ground.
According to the uninterrupted power source of the present invention, it is preferable that the AC/DC conversion modules include the first diode, the two or two
Pole pipe, the 3rd diode, the 4th diode, first switch pipe and second switch pipe, wherein, the negative pole of the 4th diode connects
The positive pole of the 3rd diode is connected to, the negative pole of the 3rd diode is connected to the positive pole of first diode, described
The negative pole of first diode is connected to the positive pole of second diode, and the source electrode of the first switch pipe is connected to described second
The drain electrode of switching tube, the drain electrode of the first switch pipe are connected to the section between first diode and second diode
Point, the source electrode of the second switch pipe are connected to the node between the 3rd diode and the 4th diode, and described
Node between one switching tube and the second switch pipe is connected to reference ground, the negative pole of second diode and the described 4th
The positive pole of diode is respectively connecting to the positive DC output end of the AC/DC conversion modules and negative DC output ends.
According to the uninterrupted power source of the present invention, it is preferable that the AC/DC conversion modules include the first controllable silicon, second can
Silicon, the second diode, the 4th diode, first switch pipe and second switch pipe are controlled, wherein, the negative pole of the 4th diode connects
The anode of second controllable silicon is connected to, the negative electrode of second controllable silicon is connected to the anode of first controllable silicon, described
The negative electrode of first controllable silicon is connected to the positive pole of second diode, and the source electrode of the first switch pipe is connected to described second
The drain electrode of switching tube, the drain electrode of the first switch pipe are connected to the section between first controllable silicon and second diode
Point, the source electrode of the second switch pipe are connected to the node between second controllable silicon and the 4th diode, and described
Node between one switching tube and the second switch pipe is connected to reference ground, the negative pole of second diode and the described 4th
The positive pole of diode is respectively connecting to the positive DC output end of the AC/DC conversion modules and negative DC output ends.
According to the uninterrupted power source of the present invention, it is preferable that the AC/DC conversion modules are I type tri-level circuits.
According to the uninterrupted power source of the present invention, it is preferable that the I types tri-level circuit includes the second switch being sequentially connected
Pipe and the 3rd switching tube, the first diode being sequentially connected, the second diode, the 3rd diode and the 4th diode, Yi Jiyi
5th diode of secondary connection and the 6th diode, the source electrode of the second switch pipe and drain electrode are respectively connecting to the described 2nd 2
The positive pole and negative pole of pole pipe, the source electrode of the 3rd switching tube and drain electrode are respectively connecting to the positive pole of the 3rd diode and born
Pole, the negative pole of the 5th diode are connected to the positive pole of first diode, and the positive pole of the 6th diode is connected to
The positive pole of 3rd diode, the node between the 5th diode and the 6th diode are connected to reference ground, institute
The positive pole of the negative pole and the 4th diode of stating the first diode is respectively connecting to the positive DC output of the AC/DC conversion modules
End and negative DC output ends.
According to the uninterrupted power source of the present invention, it is preferable that the I types tri-level circuit also includes first switch pipe and the 4th
Switching tube, the source electrode of the first switch pipe and drain electrode are respectively connecting to the positive pole and negative pole of first diode, and described four
The source electrode of switching tube and drain electrode are respectively connecting to the positive pole and negative pole of the 4th diode.
According to the uninterrupted power source of the present invention, it is preferable that the AC/DC conversion modules are T-shaped tri-level circuits.
According to the uninterrupted power source of the present invention, it is preferable that the T-shaped tri-level circuit includes the first diode, the two or two
Pole pipe, the 3rd diode and the 4th diode and the 3rd switching tube and the 4th switching tube, the positive pole of first diode connect
The negative pole of second diode is connected to, the positive pole of the 3rd diode is connected to the positive pole of the 4th diode, described
The negative pole of 3rd diode is connected to the node between first diode and second diode, the 4th diode
Negative pole be connected to reference ground, the source electrode of the 3rd switching tube and drain electrode be respectively connecting to the 3rd diode positive pole and
Negative pole, the source electrode of the 4th switching tube and drain electrode are respectively connecting to the positive pole and negative pole of the 4th diode, and described first
The positive pole of the negative pole of diode and second diode is respectively connecting to the positive DC output end of the AC/DC conversion modules and born
DC output ends.
According to the uninterrupted power source of the present invention, it is preferable that the T-shaped tri-level circuit also includes first switch pipe and second
Switching tube, the source electrode of the first switch pipe and drain electrode are respectively connecting to the positive pole and negative pole of first diode, and described
The source electrode of two switching tubes and drain electrode are respectively connecting to the positive pole and negative pole of second diode.
According to the uninterrupted power source of the present invention, it is preferable that the charger circuit includes rectifier, the 3rd electric capacity and DC/
DC converters, the rectifier, the 3rd electric capacity and the DC/DC converters are parallel with one another.
According to the uninterrupted power source of the present invention, it is preferable that each switching tube can be insulated gate bipolar transistor IGBT
Or mos field effect transistor MOSFET.
In the uninterrupted power source of the present invention, charger circuit and main power circuit share PFC circuits, realize charger
Active PFC function, reduce cost, and design by full-bridge rectification, two bus (BUS) voltages be reduced to one
Bus voltage, the input voltage of charger is reduced, improve the efficiency of charging.
Brief description of the drawings
Embodiments of the present invention is further illustrated referring to the drawings, wherein：
Fig. 1 is a UPS of prior art electrical block diagram；
Fig. 2 is another UPS of prior art electrical block diagram；
Fig. 3 is the electrical block diagram according to the UPS of the first embodiment of the present invention；
Fig. 4 show when civil power input for just, first switch pipe Q1 conducting when, the current loop in UPS shown in Fig. 3；
Fig. 5 show when civil power input for just, first switch pipe Q1 disconnect when, the current loop in UPS shown in Fig. 3；
When Fig. 6 shows that when civil power inputs be negative, second switch pipe Q2 is turned on, the current loop in UPS shown in Fig. 3；
When Fig. 7 shows that when civil power inputs be negative, second switch pipe Q2 disconnects, the current loop in UPS shown in Fig. 3；
Fig. 8 is the electrical block diagram according to the UPS of the second embodiment of the present invention；
Fig. 9 show when civil power input for just, the 3rd switching tube Q3 conducting when, the current loop in UPS shown in Fig. 8；
Figure 10 show when civil power input for just, the 3rd switching tube Q3 disconnect when, the current loop in UPS shown in Fig. 8；
When Figure 11 shows that when civil power inputs be negative, second switch pipe Q2 is turned on, the current loop in UPS shown in Fig. 8；
When Figure 12 shows that when civil power inputs be negative, second switch pipe Q2 disconnects, the current loop in UPS shown in Fig. 8；
Figure 13 is the electrical block diagram according to the UPS of the third embodiment of the present invention；
Figure 14 show when civil power input for just, the 3rd switching tube Q3 conducting when, the current loop in UPS shown in Figure 13；
Figure 15 show when civil power input for just, the 3rd switching tube Q3 disconnect when, the current loop in UPS shown in Figure 13；
When Figure 16 shows that when civil power inputs be negative, the 4th switching tube Q4 is turned on, the current loop in UPS shown in Figure 13；
When Figure 17 shows that when civil power inputs be negative, the 4th switching tube Q4 disconnects, the current loop in UPS shown in Figure 13.
Embodiment
In order that the purpose of the present invention, technical scheme and advantage are more clearly understood, pass through below in conjunction with accompanying drawing specific real
Applying example, the present invention is described in more detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
First embodiment
Fig. 3 is the electrical block diagram according to the UPS of the first embodiment of the present invention.The UPS include charger circuit,
Battery, pfc circuit, the first electric capacity C1, the second electric capacity C2 and inverter.Charger circuit includes rectifier REC, the 3rd electricity
Hold C3 and DC/DC converters, REC, the 3rd electric capacity C3 and DC/DC converter are parallel with one another.Pfc circuit includes inductance L1, first
Diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, first switch pipe Q1 and second switch pipe Q2, it is
It is easy to illustrate, in the present invention, the remainder that inductance L1 is removed in pfc circuit is referred to as AC/DC conversion modules, inductance L1
Output end be connected to the inputs of AC/DC conversion modules.Wherein, the 4th diode D4 negative pole is connected to the 3rd diode D3
Positive pole, the 3rd diode D3 negative pole is connected to the first diode D1 positive pole, and the first diode D1 negative pole is connected to
Two diode D2 positive pole, first switch pipe Q1 drain electrode are connected to second switch pipe Q2 source electrode, first switch pipe Q1 source
Pole is connected to the node between the first diode D1 and the second diode D2, and second switch pipe Q2 drain electrode is connected to the three or two pole
Node between pipe D3 and the 4th diode D4, the node between the first diode D1 and the 3rd diode D3 are connected to inductance L1
Output end, the second diode D2 negative pole and the 4th diode D4 positive pole are respectively connecting to the first electric capacity C1 and the second electric capacity
C2 form series circuit both ends and be connected to the input of inverter.The input of charger circuit is connected to the electricity
Node and reference ground, the output end of charger circuit between sense L1 and the AC/DC conversion modules are connected to the input of battery
End, for charging the battery.The input of pfc circuit is that inductance L1 input is connected to mains electricity input end.First electric capacity C1
Node between the second node and first switch pipe Q1 and second switch pipe Q2 between electric capacity C2 is connected to reference ground.It is inverse
The output end for becoming device is connected to load.
It is described referring to the working method of Fig. 4-7 couples of Fig. 3 charger topology.
When civil power input is timing：
First switch pipe Q1 turn on when, current loop 1 be civil power input->L1—>D1—>Q1—>Reference ground, PFC's
Inductance L1 storage energies, as shown in Figure 4.
When first switch pipe Q1 disconnects, electric current has two loops 2 and 3.Current loop 2 be civil power input->L1—>D1—
>D2—>C1—>Reference ground；Current loop 3 be civil power input->L1—>REC—>C3—>REC—>Reference ground, such as Fig. 5 institutes
Show.Current loop 2 charges to the first electric capacity C1, and current loop 3 charges via REC to the 3rd electric capacity C3, then passes through DC/DC
Converter charges the battery.
When civil power input is bears：
Second switch pipe Q2 turn on when, current loop 4 be reference ground->Q2—>D3—>L1—>Civil power inputs, PFC electricity
The inductance L1 storage energies on road, as shown in Figure 6.
When second switch pipe Q2 disconnects, electric current has two loops 5 and 6.Current loop 5 be reference ground->C2—>D4—>
D3—>L1—>Civil power inputs；Current loop 6 be reference ground->REC—>C3—>REC—>L1—>Civil power inputs, such as Fig. 7 institutes
Show.Current loop 5 charges to the second electric capacity C2, and current loop 6 charges via REC to the 3rd electric capacity C3, then passes through DC/DC
Converter charges the battery.
In the UPS topologys of the present embodiment, the input of charger circuit is connected to the inductance L1 of pfc circuit output
End, realize charger PFC correction, and make C3 voltage be always single DC bus capacitances (C1 or C2) voltage.
In the UPS of the first embodiment, the first diode D1 and the 3rd diode D3 can be respectively by the first controllable silicons
SCR1 and the second controllable silicon SCR 2 substitute, and the situation is not shown in accompanying drawing.
Second embodiment
Fig. 8 is the electrical block diagram according to the charger topology of the second embodiment of the present invention.It includes charger
Circuit, battery, pfc circuit, the first electric capacity C1, the second electric capacity C2 and inverter.Charger circuit includes rectifier REC, electricity
Hold C3 and DC/DC converters, REC, the 3rd electric capacity C3 and DC/DC converter are parallel with one another.Pfc circuit includes inductance L1, first
To the 6th diode D1-D6, first to fourth switching tube Q1-Q4.First to the 6th diode D1-D6 and first to fourth is opened
Close pipe Q1-Q4 and form typical I types tri-level circuit, in the present invention referred to as AC/DC conversion modules.Wherein, first to fourth
Switching tube Q1-Q4 is sequentially connected, and first to fourth diode D1-D4 is sequentially connected, and the 5th and the 6th diode D5 and D6 is successively
Connection, and first to fourth switching tube Q1-Q4 source electrode and drain electrode are being respectively connecting to first to fourth diode D1-D4 just
Pole and negative pole, the 5th diode D5 negative pole are connected to the first diode D1 positive pole, and the 6th diode D6 positive pole is connected to
3rd diode D3 positive pole, the node between the 5th diode D5 and the 6th diode D6 are connected to reference ground.Inductance L1's
Output end is connected to the input of AC/DC conversion modules.The input of charger circuit is connected to the inductance L1 and AC/DC and become
The node and reference ground between block are changed the mold, the output end of charger circuit is connected to the input of battery, for charging the battery.
The input of pfc circuit be connected to civil power input, its export DC bus positive pole and negative pole be respectively connecting to the first electric capacity C1 and
The both ends for the series circuit that second electric capacity C2 is formed, and it is connected to the input of inverter.The output end of inverter is connected to
Load.
It is described referring to the working method of Fig. 9-12 couples of Fig. 8 charger topology.
When civil power input is timing：
3rd switching tube Q3 turn on when, current loop 1 be civil power input->L1—>Q3—>D6—>Reference ground, PFC's
Inductance L1 storage energies, as shown in Figure 9.
When 3rd switch Q3 disconnects, electric current has two loops 2 and 3.Current loop 2 be civil power input->L1—>D2—>
D1—>C1—>Reference ground；Current loop 3 be civil power input->L1—>REC—>C3—>REC—>Reference ground, such as Figure 10 institutes
Show.Current loop 2 charges to the first electric capacity C1, and current loop 3 charges via REC to the 3rd electric capacity C3, then passes through DC/DC
Converter charges the battery.
When civil power input is bears：
Second switch pipe Q2 turn on when, current loop 4 be reference ground->D5—>Q2—>L1—>Civil power inputs, PFC's
Inductance L1 storage energies, as shown in figure 11.
When second switch pipe Q2 disconnects, electric current has two loops 5 and 6.Current loop 5 be reference ground->C2—>D4—>
D3—>L1—>Civil power input, current loop 6 be reference ground->REC—>C3—>REC—>L1—>Civil power inputs, such as Figure 12
It is shown.Current loop 5 charges to the second electric capacity C2, and current loop 6 charges via REC to the 3rd electric capacity C3, then passes through DC/
DC converters charge the battery.
In the UPS topologys of the second embodiment, the input of charger circuit is connected to the defeated of the inductance L1 of pfc circuit
Go out end, realize charger PFC correction, and make C3 voltage be always single DC bus capacitances (C1 or C2) voltage.
In the UPS of the second embodiment, first switch pipe Q1 and the 4th switching tube Q4 can be removed, and this is not shown in accompanying drawing
Situation.
3rd embodiment
Figure 13 is the electrical block diagram according to the charger topology of the third embodiment of the present invention.It includes charger
Circuit, battery, pfc circuit, the first electric capacity C1, the second electric capacity C2 and inverter.Charger circuit includes parallel with one another whole
Flow device REC, electric capacity C3 and DC/DC converter.Pfc circuit includes inductance L1, first to fourth diode D1-D4, first to the
Four switching tube Q1-Q4.First to fourth diode D1-D4 and first to fourth switching tube Q1-Q4 forms typical T-shaped three electricity
Ordinary telegram road, in the present invention referred to as AC/DC conversion modules.Wherein, the first diode D1 positive pole is connected to second switch pipe D2
Negative pole, the 3rd diode D3 positive pole is connected to the 4th diode D4 positive pole, and the 3rd diode D3 negative pole is connected to
Node between one diode D1 and the second diode D2, the 4th diode D4 negative pole are connected to reference ground, and first to fourth
Switching tube Q1-Q4 source electrode and drain electrode are respectively connecting to first to fourth diode D1-D4 positive pole and negative pole.Inductance L1's is defeated
Go out the input that end is connected to AC/DC conversion modules.The input of charger circuit is connected to the inductance L1 and AC/DC and converted
Node and reference ground between module, the output end of charger circuit is connected to the input of battery, for charging the battery.
The input of pfc circuit be connected to civil power input, its export DC bus positive pole and negative pole be respectively connecting to the first electric capacity C1 and
The both ends for the series circuit that second electric capacity C2 is formed, and it is connected to the input of inverter.The output end of inverter is connected to
Load.
It is described referring to the working method of Figure 14-17 couples of Figure 13 charger topology.
When civil power input is timing：
3rd switching tube Q3 turn on when, current loop 1 be civil power input->L1—>Q3—>D4—>Reference ground, PFC electricity
Sensor L1 storage energies, as shown in figure 14.
When 3rd switching tube Q3 disconnects, electric current has two loops 2 and 3.Current loop 2 be civil power input->L1—>D1—
>C1—>Reference ground, current loop 3 be civil power input->L1—>REC—>C3—>REC—>Reference ground, as shown in figure 15.Electricity
Loop 2 is flowed to charge to the first electric capacity C1, and current loop 3 charges via REC to the 3rd electric capacity C3, is then changed by DC/DC
Device charges the battery.
When civil power input is bears：
4th switching tube Q4 turn on when, current loop 4 be reference ground->Q4—>D3—>L1—>Civil power inputs, PFC's
Inductance L1 storage energies, as shown in figure 16.
When 4th switching tube Q4 disconnects, electric current has two loops 5 and 6.Current loop 5 be reference ground->C2—>D2—>
L1—>Civil power input, current loop 6 be reference ground->REC—>C3—>REC—>L1—>Civil power inputs, as shown in figure 17.
Current loop 5 charges to the second electric capacity C2, and current loop 6 charges via REC to the 3rd electric capacity C3, is then turned by DC/DC
Parallel operation charges the battery.
In the UPS topologys of the 3rd embodiment, the input of charger circuit is connected to the defeated of the inductance L1 of pfc circuit
Go out end, realize charger PFC correction, and make C3 voltage be always single DC bus capacitances (C1 or C2) voltage.
In addition, in the UPS of the 3rd embodiment, first switch pipe Q1 and second switch pipe Q2 can be removed, and accompanying drawing is not
The situation is shown.
According to other embodiments of the invention, UPS of the invention require nothing more than charger circuit input be connected to PFC electricity
The output end of inductance in road, the concrete structure without limiting pfc circuit.
According to other embodiments of the invention, UPS of the invention does not limit the concrete structure of charger circuit.
According to other embodiments of the invention, switching tube can use switching device well known in the art, such as insulated gate
Bipolar transistor IGBT or mos field effect transistor MOSFET.
The UPS of the present invention has reused pfc circuit, has saved cost.In addition, the input electricity of UPS charger circuit
Pressure is the half of DC bus voltage, improves charge efficiency, and DC bus will not be made unbalance, can adapt to specific battery electricity
Press scope.
Although the present invention be described by means of preferred embodiments, but the present invention be not limited to it is described here
Embodiment, also include made various changes and change without departing from the present invention.
Claims (10)
1. a kind of uninterrupted power source, including the PFC electricity being connected in turn between the input of the uninterrupted power source and output end
Road, the first electric capacity, the second electric capacity and inverter, the pfc circuit include inductance and AC/DC conversion modules, wherein, it is described not between
Power-off source also includes charger circuit, and the input of the charger circuit is connected to the inductance and becomes mold changing with the AC/DC
Node and reference ground between block, the output end of the AC/DC conversion modules are connected to first electric capacity and second electricity
Hold the both ends of the circuit for the composition that is connected to each other and be connected to the input of the inverter, first electric capacity and described second
Node between electric capacity is connected to reference ground.
2. uninterrupted power source according to claim 1, wherein, the AC/DC conversion modules include the first diode, second
Diode, the 3rd diode, the 4th diode, first switch pipe and second switch pipe, wherein, the negative pole of the 4th diode
The positive pole of the 3rd diode is connected to, the negative pole of the 3rd diode is connected to the positive pole of first diode, institute
The negative pole for stating the first diode is connected to the positive pole of second diode, and the source electrode of the first switch pipe is connected to described
The drain electrode of two switching tubes, the drain electrode of the first switch pipe are connected between first diode and second diode
Node, the source electrode of the second switch pipe is connected to the node between the 3rd diode and the 4th diode, described
Node between first switch pipe and the second switch pipe is connected to reference ground, the negative pole of second diode and described
The positive pole of four diodes is respectively connecting to the positive DC output end of the AC/DC conversion modules and negative DC output ends.
3. uninterrupted power source according to claim 1, wherein, the AC/DC conversion modules include the first controllable silicon, second
Controllable silicon, the second diode, the 4th diode, first switch pipe and second switch pipe, wherein, the negative pole of the 4th diode
The anode of second controllable silicon is connected to, the negative electrode of second controllable silicon is connected to the anode of first controllable silicon, institute
The negative electrode for stating the first controllable silicon is connected to the positive pole of second diode, and the source electrode of the first switch pipe is connected to described
The drain electrode of two switching tubes, the drain electrode of the first switch pipe are connected between first controllable silicon and second diode
Node, the source electrode of the second switch pipe is connected to the node between second controllable silicon and the 4th diode, described
Node between first switch pipe and the second switch pipe is connected to reference ground, the negative pole of second diode and described
The positive pole of four diodes is respectively connecting to the positive DC output end of the AC/DC conversion modules and negative DC output ends.
4. uninterrupted power source according to claim 1, wherein, the AC/DC conversion modules are I type tri-level circuits.
5. uninterrupted power source according to claim 4, wherein, the I types tri-level circuit includes second be sequentially connected
Switching tube and the 3rd switching tube, the first diode being sequentially connected, the second diode, the 3rd diode and the 4th diode, with
And the 5th diode being sequentially connected and the 6th diode, the source electrode of the second switch pipe and drain electrode are respectively connecting to described
The positive pole and negative pole of two diodes, the source electrode of the 3rd switching tube and drain electrode are respectively connecting to the positive pole of the 3rd diode
And negative pole, the negative pole of the 5th diode are connected to the positive pole of first diode, the positive pole of the 6th diode connects
The positive pole of the 3rd diode is connected to, the node between the 5th diode and the 6th diode is connected to reference
The positive pole of ground, the negative pole of first diode and the 4th diode is being respectively connecting to the AC/DC conversion modules just
DC output ends and negative DC output ends.
6. uninterrupted power source according to claim 5, wherein, the I types tri-level circuit also include first switch pipe and
4th switching tube, the source electrode of the first switch pipe and drain electrode are respectively connecting to the positive pole and negative pole of first diode, institute
State the source electrode of four switching tubes and drain electrode is respectively connecting to the positive pole and negative pole of the 4th diode.
7. uninterrupted power source according to claim 1, wherein, the AC/DC conversion modules are T-shaped tri-level circuits.
8. uninterrupted power source according to claim 7, wherein, the T-shaped tri-level circuit includes the first diode, second
Diode, the 3rd diode and the 4th diode and the 3rd switching tube and the 4th switching tube, the positive pole of first diode
The negative pole of second diode is connected to, the positive pole of the 3rd diode is connected to the positive pole of the 4th diode, institute
The negative pole for stating the 3rd diode is connected to node between first diode and second diode, the four or two pole
The negative pole of pipe is connected to reference ground, and the source electrode of the 3rd switching tube and drain electrode are respectively connecting to the positive pole of the 3rd diode
And negative pole, the source electrode of the 4th switching tube and drain electrode are respectively connecting to the positive pole and negative pole of the 4th diode, described
The positive pole of the negative pole of one diode and second diode be respectively connecting to the AC/DC conversion modules positive DC output end and
Negative DC output ends.
9. uninterrupted power source according to claim 8, wherein, the T-shaped tri-level circuit also include first switch pipe and
Second switch pipe, the source electrode of the first switch pipe and drain electrode are respectively connecting to the positive pole and negative pole of first diode, institute
State the source electrode of second switch pipe and drain electrode is respectively connecting to the positive pole and negative pole of second diode.
10. according to the uninterrupted power source any one of claim 1-9, wherein, the charger circuit include rectifier,
3rd electric capacity and DC/DC converters, the rectifier, the 3rd electric capacity and the DC/DC converters are parallel with one another.
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| CN201610805843.8A CN107809131A (en) | 2016-09-06 | 2016-09-06 | Uninterrupted power source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610805843.8A CN107809131A (en) | 2016-09-06 | 2016-09-06 | Uninterrupted power source |
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| CN107809131A true CN107809131A (en) | 2018-03-16 |
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| CN201610805843.8A Pending CN107809131A (en) | 2016-09-06 | 2016-09-06 | Uninterrupted power source |
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