CN103187785B - A kind of UPS module and ups system - Google Patents
A kind of UPS module and ups system Download PDFInfo
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- CN103187785B CN103187785B CN201110443890.XA CN201110443890A CN103187785B CN 103187785 B CN103187785 B CN 103187785B CN 201110443890 A CN201110443890 A CN 201110443890A CN 103187785 B CN103187785 B CN 103187785B
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Abstract
The invention discloses a kind of UPS module and ups system, this UPS module comprises the PFC rectification unit and inversion unit that connect successively, and described PFC rectification unit is used for being that positive and negative bus charges when electric main is normal, described UPS module also comprises DC/DC converter unit, described DC/DC converter unit comprises BUCK-BOOST circuit, when electric main is abnormal, described DC/DC converter unit is positive bus-bar charging by described PFC rectification unit, and is negative busbar charging by described BUCK-BOOST circuit.Implement technical scheme of the present invention; when electric main is normal or abnormal; the upper brachium pontis of PFC rectification unit is shared; this just makes UPS module when using battery pack; without the need to adopting isolation boosting transformer; save space and cost, complied with the trend of Switching Power Supply miniaturization, and reduced loss.In addition, DC/DC converter unit and PFC rectification unit, because there is coupling circuit, utilizes partial PFC rectification unit device, provide cost savings, improve efficiency.
Description
Technical field
The present invention relates to power electronic technology, particularly relate to a kind of UPS module and ups system.
Background technology
UPS(UninterruptiblePowerSupply, uninterrupted power supply) be widely used in multiple industries such as electric power, telecommunications, finance, government, manufacture, it can ensure power failure after work on a period of time, make that user is unlikely affects work or obliterated data because of power failure, can also eliminate the surge on civil power, instant high-voltage, moment low-voltage, electric wire noise and frequency shift (FS) etc. " power pollution ".
At present, in the ups system design of middle low power, the problem of CB common battery group during in order to solve multiple UPS wired in parallel, as shown in Figure 1, traditional method is that DC/DC converter unit 300 is designed to isolation boosting circuit, such as, after adopting the isolating transformer T1 in Fig. 1 to boost, directly export DC bus to, then after inversion unit 200 inversion, export load to.The DC/DC converter unit 300 of the benefit of this scheme and completely isolated the coming of PFC rectification unit 100 and be not coupled, improve the reliability of system.But in fact, this completely isolated scheme is not optimum selection from cost, space and standpoint of efficiency, and its major defect is:
1, DC/DC converter unit 300 adopts traditional push-pull circuit, and operating frequency is low, and the volume of transformer T1 and loss increase, efficiency are low;
2, DC/DC converter unit 300 is completely isolated with PFC rectification unit 100, and do not have coupling circuit, cannot utilize PFC rectification unit 100 during DC pattern, cost and efficiency cannot accomplish optimum;
3, this completely isolated quantity of transformer T1 and the volume of just causing increases, and both occupied space and turn increased cost, this also disagrees with the trend toward miniaturization of Switching Power Supply.
Summary of the invention
The technical problem to be solved in the present invention is, the above-mentioned UPS module cost for prior art is large, space is large, and ineffective defect, provides that a kind of cost is little, space is little and the UPS module that operating efficiency is high.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of UPS module, for carrying out discharge and recharge to battery pack, described UPS module comprises the PFC rectification unit and inversion unit that connect successively, and described PFC rectification unit is used for just being when electric main is normal, negative busbar is charged, described UPS module also comprises DC/DC converter unit, described DC/DC converter unit comprises BUCK-BOOST circuit, when electric main is abnormal, described DC/DC converter unit is positive bus-bar charging by described PFC rectification unit, and be negative busbar charging by described BUCK-BOOST circuit.
In UPS module of the present invention, described DC/DC converter unit also comprises the first switch, described BUCK-BOOST circuit comprises the 5th switching tube, diode D5 and energy storage inductor L3, wherein, the first end of the first switch connects the positive pole of battery pack, the negative pole of battery pack connects center line, second end of the first switch connects the input of described PFC rectification unit, the positive pole of the second termination battery pack of the 5th switching tube, the first end of the three-terminal link energy storage inductor L3 of the 5th switching tube, the second termination center line of energy storage inductor L3, the positive pole of diode D5 connects negative busbar, the negative pole of diode D5 connects second end of energy storage inductor L3.
In UPS module of the present invention, described first switch is relay switch.
In UPS module of the present invention, described electric main is two-phase, described PFC rectification unit comprises energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, diode D3, diode D4, the first switching tube of anti-paralleled diode, the second switch pipe of anti-paralleled diode, the 3rd switching tube of anti-paralleled diode, the 4th switching tube of anti-paralleled diode, filter capacitor C1, filter capacitor C2, wherein, the first end of energy storage inductor L1 connects the output of first-phase electric main, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D3 respectively, the first end of energy storage inductor L2 connects the output of second-phase electric main, second end of energy storage inductor L2 connects the positive pole of diode D2 and the negative pole of diode D4 respectively, the negative pole of diode D1 and the negative pole of diode D2 connect positive bus-bar respectively, the positive pole of diode D3 and the positive pole of diode D4 connect negative busbar respectively, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump, second end of the first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, 3rd end of the first switching tube is connected with the 3rd end of second switch pipe, second end of the 3rd switching tube connects the negative pole of diode D4, second end of the 4th switching tube connects center line, 3rd end of the 3rd switching tube is connected with the 3rd end of the 4th switching tube.
In UPS module of the present invention, described PFC rectification unit comprises energy storage inductor L1, diode D1, diode D2, the first switching tube of anti-paralleled diode, the second switch pipe of anti-paralleled diode, filter capacitor C1, filter capacitor C2, wherein, the first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D2 respectively, the negative pole of diode D1 connects positive bus-bar, the positive pole of diode D2 connects negative busbar, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump, second end of the first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, 3rd end of the first switching tube is connected with the 3rd end of second switch pipe.
In UPS module of the present invention, described PFC rectification unit comprises energy storage inductor L1, diode D1, diode D2, diode D3, diode D4, the first switching tube, second switch pipe, filter capacitor C1, filter capacitor C2, wherein, the first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D2 respectively, the negative pole of diode D1 connects the positive pole of diode D3, the negative pole positive bus-bar of diode D3, the positive pole of diode D2 connects the negative pole of diode D4, the positive pole of diode D4 connects negative busbar, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump, second end of the first switching tube connects the negative pole of diode D1, the positive pole of the 3rd terminating diode D2 of second switch pipe, 3rd end of the first switching tube and the second end of second switch pipe connect center line in the lump.
In UPS module of the present invention, described PFC rectification unit comprises energy storage inductor L1, diode rectifier bridge, diode D1, diode D2, the first switching tube of anti-paralleled diode, filter capacitor C1, filter capacitor C2, wherein, the first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects the second end of diode rectifier bridge respectively, the positive pole of diode D1 and the negative pole of diode D2, second end of diode rectifier bridge, 4th end connects center line, the first end of diode rectifier bridge connects the second end of the first switching tube, 4th end of the three-terminal link diode rectifier bridge of the first switching tube, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump.
In UPS module of the present invention, described electric main is three-phase, described PFC rectification unit comprises three-phase diode rectifier bridge, energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, the first switching tube, second switch pipe, filter capacitor C1, filter capacitor C2, wherein, the three-phase input end of described three-phase diode rectifier bridge connects three-phase alternating current civil power respectively, first output of three-phase diode rectifier bridge connects the first end of energy storage inductor L1, second end of energy storage inductor L1 connects the positive pole of diode D1, the negative pole of diode D1 connects positive bus-bar, second output of three-phase diode rectifier bridge connects the first end of energy storage inductor L2, second end of energy storage inductor L2 connects the negative pole of diode D2, the positive pole of diode D2 connects negative busbar, second end of the first switching tube connects the positive pole of diode D1, the negative pole of the three-terminal link diode D2 of second switch pipe, 3rd end of the first switching tube and the second end of second switch pipe connect center line in the lump, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump.
In UPS module of the present invention, described inversion unit is two level inverter circuits, I type three-level inverter circuit or T-shaped three-level inverter circuit.
The present invention also constructs a kind of ups system, and comprise battery pack and a UPS module or at least two UPS modules be in parallel, described UPS module is above-described UPS module.
Implement technical scheme of the present invention; when electric main is normal or abnormal; PFC rectification unit is shared, therefore PFC rectification unit and DC/DC converter unit have coupling circuit, is also non-isolated; this just makes UPS module when using battery pack; without the need to adopting isolation boosting transformer, saving space and cost, having complied with the trend of Switching Power Supply miniaturization; and reduce loss, improve efficiency.In addition, DC/DC converter unit and PFC rectification unit, because there is coupling circuit, utilizes partial PFC rectification unit device, provide cost savings, improve efficiency.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the circuit diagram of a kind of UPS module of prior art;
Fig. 2 is the building-block of logic of UPS module embodiments one of the present invention;
Fig. 3 is the circuit diagram of UPS module embodiments two of the present invention;
Fig. 4 is the circuit diagram of UPS module embodiments three of the present invention;
Fig. 5 is the circuit diagram of UPS module embodiments four of the present invention;
Fig. 6 is the circuit diagram of UPS module embodiments five of the present invention;
Fig. 7 is the circuit diagram of UPS module embodiments six of the present invention.
Embodiment
As shown in Figure 2, in the building-block of logic of UPS module embodiments one of the present invention, this UPS module comprises PFC rectification unit 100, inversion unit 200 and DC/DC converter unit 300.DC/DC converter unit 300 comprises BUCK-BOOST circuit 301.
When electric main is normal, electric main (LINE) obtains direct voltage by PFC rectification unit 100 rectification, this direct voltage inversion is alternating voltage by inversion unit 200, with power to load (not shown) and by charger (not shown) to batteries charging.When electric main is abnormal, DC/DC converter unit 300 is positive bus-bar charging by PFC rectification unit 100, and is negative busbar charging by BUCK-BOOST circuit 301.Implement this technical scheme; when electric main is normal or abnormal; PFC rectification unit is shared, therefore PFC rectification unit 100 and DC/DC converter unit 300 have coupling circuit, is also non-isolated; this just makes UPS module when using battery pack; without the need to adopting isolation boosting transformer, saving space and cost, having complied with the trend of Switching Power Supply miniaturization; and reduce loss, improve efficiency.In addition, DC/DC converter unit 300 and PFC rectification unit 100, because there is coupling circuit, utilizes partial PFC rectification unit device, provide cost savings, improve efficiency.
Fig. 3 is the circuit diagram of UPS module embodiments two of the present invention, and in this embodiment, electric main is two-phase, and this UPS module comprises PFC rectification unit 100, inversion unit 200, DC/DC converter unit 300.Each part is described respectively below:
1.PFC rectification unit 100
In this PFC rectification unit 100, PFC rectification unit comprises energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, diode D3, diode D4, the first switching tube of anti-paralleled diode, the second switch pipe of anti-paralleled diode, the 3rd switching tube of anti-paralleled diode, the 4th switching tube of anti-paralleled diode, filter capacitor C1, filter capacitor C2.Described herein, all switching tubes mentioned by the present invention all can select IGBT to manage, and such as, the first switching tube in the present embodiment, second switch pipe, the 3rd switching tube, the 4th switching tube select IGBT pipe Q1, Q2, Q3, Q4.Certainly, in other embodiment that power requirement is lower, also metal-oxide-semiconductor can be selected.When switching tube selects IGBT pipe, second end of switching tube is its collector electrode, and the 3rd end of switching tube is its emitter, and the first end of switching tube is its gate-drive pole, and connection control circuit (not shown), this control circuit is for controlling break-make frequency and the make-and-break time of each switching tube.In this PFC rectification unit 100, the output (LINE1) of first-phase electric main connects the first end of energy storage inductor L1 by switch S 1, and the output (LINE2) of second-phase electric main connects the first end of energy storage inductor L2 by switch S 2.Second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D3 respectively, second end of energy storage inductor L2 connects the positive pole of diode D2 and the negative pole of diode D4 respectively, the negative pole of diode D1 and the negative pole of diode D2 connect positive bus-bar (BUS+) respectively, the positive pole of diode D3 and the positive pole of diode D4 connect negative busbar (BUS-) respectively, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line (NEUTRAL) in the lump, second end of the first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, 3rd end of the first switching tube is connected with the 3rd end of second switch pipe, second end of the 3rd switching tube connects the negative pole of diode D4, second end of the 4th switching tube connects center line, 3rd end of the 3rd switching tube is connected with the 3rd end of the 4th switching tube,
2, inversion unit 200
This inversion unit 200 comprises the 6th switching tube of anti-paralleled diode, the 7th switching tube of anti-paralleled diode, the 8th switching tube of anti-paralleled diode, the 9th switching tube of anti-paralleled diode, energy storage inductor L4, energy storage inductor L5, filter capacitor C3, filter capacitor C4.In this embodiment, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube select IGBT pipe Q6, Q7, Q8, Q9 respectively.In this inversion unit, second end of the 6th switching tube and the second end of the 8th switching tube connect positive bus-bar respectively, 3rd end of the 7th switching tube and the 3rd end of the 9th switching tube connect negative busbar respectively, 3rd end of the 6th switching tube is connected with the second end of the 7th switching tube, 3rd end of the 8th switching tube is connected with the second end of the 9th switching tube, the first end of energy storage inductor L4 connects the 3rd end of the 6th switching tube, second end of energy storage inductor L4 is the first-phase ac output end (OUT-LINE1) of described UPS module, the first end of energy storage inductor L5 connects the 3rd end of the 8th switching tube, second end of energy storage inductor L5 is the second-phase ac output end (OUT-LINE2) of described UPS module, the first end of filter capacitor C3 connects second end of energy storage inductor L4, the first end of filter capacitor C4 connects the first end of energy storage inductor L5, second end of filter capacitor C3 and second end of filter capacitor C4 connect center line in the lump.Therefore, the inversion unit of this inversion unit 200 two-phase output;
3, DC/DC converter unit 300
This DC/DC converter unit 300 comprises switch S 3 and BUCK-BOOST circuit, and wherein, BUCK-BOOST circuit comprises the 5th switching tube, the diode D5 and energy storage inductor L3 of anti-paralleled diode.Certainly, in another embodiment, can save with the antiparallel diode of the 5th switching tube.In this embodiment, the 5th switching tube selects IGBT pipe Q5.In this DC/DC converter unit 300, the first end of switch S 3 connects the positive pole of battery pack, the negative pole of battery pack connects center line, second end of switch S 3 connects the first end of energy storage inductor L1, the positive pole of the second termination battery pack of the 5th switching tube, the first end of the three-terminal link energy storage inductor L3 of the 5th switching tube, the second termination center line of energy storage inductor L3, the positive pole of diode D5 connects negative busbar, and the negative pole of diode D5 connects second end of energy storage inductor L3.
The following describes the operation principle of the UPS module of this embodiment:
When electric main is normal, Closing Switch S1, S2, cut-off switch S3, be load supplying after passing through rectification, inversion by electric main, be specially: in commutation phase, for the electric main of first-phase, have following four-stage: during the positive half cycle of the electric main (LINE1) of (1) first-phase, Q1 is open-minded for IGBT pipe, electric main by switch S 1, IGBT pipe Q1, with the antiparallel diode of IGBT pipe Q2 be energy storage inductor L1 energy storage; (2), during the positive half cycle of the electric main (LINE1) of first-phase, IGBT pipe Q1 turns off, and electric main is that filter capacitor C1 charges by switch S 1, diode D1; (3), during the negative half period of the electric main (LINE1) of first-phase, Q2 is open-minded for IGBT pipe, and electric main is energy storage inductor L1 energy storage by IGBT pipe Q2, with the antiparallel diode of IGBT pipe Q1, switch S 1; (4) during the negative half period of the electric main (LINE1) of first-phase, IGBT pipe Q2 turns off, and electric main is charged for filter capacitor C2 by diode D3, switch S 1.Similarly, for the electric main (LINE2) of second-phase, also following four-stage is had: during the positive half cycle of the electric main (LINE2) of (1) second-phase, Q3 is open-minded for IGBT pipe, electric main by switch S 2, IGBT pipe Q3, with the antiparallel diode of IGBT pipe Q4 be energy storage inductor L2 energy storage; (2), during the positive half cycle of the electric main (LINE2) of second-phase, IGBT pipe Q3 turns off, and electric main is that filter capacitor C1 charges by switch S 2, diode D2; (3), during the negative half period of the electric main (LINE2) of second-phase, Q4 is open-minded for IGBT pipe, and electric main is energy storage inductor L2 energy storage by IGBT pipe Q4, with the antiparallel diode of IGBT pipe Q3, switch S 2; (4) during the negative half period of the electric main (LINE2) of second-phase, IGBT pipe Q4 turns off, and electric main is charged for filter capacitor C2 by diode D4, switch S 2.In the inversion stage, for the output AC electricity (OUT-LINE1) of first-phase, have following four-stage: the positive half cycle of (1) output AC electricity, Q6 is open-minded for IGBT pipe, filter capacitor C1 by IGBT pipe Q6, filter capacitor C1 by IGBT pipe Q6, filter capacitor C3 energy storage inductor L4 energy storage; (2) the positive half cycle of output AC electricity, IGBT pipe Q6 turns off, energy storage inductor L4 by with the antiparallel diode of IGBT pipe Q7, filter capacitor C2, C3 afterflow; (3) negative half period of output AC electricity, Q7 is open-minded for IGBT pipe, and filter capacitor C2 is energy storage inductor L4 energy storage by IGBT pipe Q7, filter capacitor C3; (4) negative half period of output AC electricity, IGBT pipe Q7 turns off, energy storage inductor L4 by with the antiparallel diode of IGBT pipe Q6, filter capacitor C1, filter capacitor C3 afterflow.The inverter of second-phase output AC electricity (OUT-LINE1) is identical with the inverter of the output AC electricity of first-phase, does not repeat at this.
When electric main is abnormal, now cut-off switch S1, S2, Closing Switch S3, rectification is passed through by battery pack, it is load supplying after inversion, should be noted that, when time battery-powered, (when electric main is abnormal) powers with electric main, (when electric main is normal) is the same in the course of work in inversion stage, do not repeat at this, in the course of work of commutation phase when below only illustrating battery-powered, total following several stages: (1) IGBT pipe Q5 keeps turning off, Q1 is open-minded for IGBT pipe, the direct current that battery pack exports is by switch S 3, IGBT pipe Q1, be energy storage inductor L1 energy storage with the antiparallel diode of IGBT pipe Q2, (2) IGBT pipe Q5 keeps turning off, and IGBT pipe Q1 turns off, and the direct current that battery pack exports is charged to filter capacitor C1 by switch S 3, diode D1, (3), when IGBT pipe Q5 opens, the direct current that battery pack exports is energy storage inductor L3 energy storage by IGBT pipe Q5, (4) when IGBT pipe Q5 turns off, energy storage inductor L3 is that filter capacitor C2 charges by diode D5.
Fig. 4 is the circuit diagram of UPS module embodiments three of the present invention, and in this embodiment, electric main is single-phase, and this UPS module comprises PFC rectification unit 100, inversion unit 200, DC/DC converter unit 300.Described herein, the circuit structure of the DC/DC converter unit 300 in this embodiment is identical with the circuit structure of the DC/DC converter unit in the embodiment two shown in Fig. 3, does not repeat at this, below different places is only described:
In this PFC rectification unit 100, PFC rectification unit 100 comprises energy storage inductor L1, diode D1, diode D2, the first switching tube of anti-paralleled diode, the second switch pipe of anti-paralleled diode, filter capacitor C1, filter capacitor C2.In this embodiment, the first switching tube, second switch pipe select IGBT pipe Q1, Q2 respectively.Wherein, the first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D2 respectively, the negative pole of diode D1 connects positive bus-bar, the positive pole of diode D2 connects negative busbar, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump, second end of the first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, 3rd end of the first switching tube is connected with the 3rd end of second switch pipe.
In this inversion unit 200, inversion unit 200 comprises the 6th switching tube of anti-paralleled diode, the 7th switching tube of anti-paralleled diode, energy storage inductor L4, filter capacitor C3.In this embodiment, the 6th switching tube, the 7th switching tube select IGBT pipe Q6, Q7 respectively.In this inversion unit, second termination positive bus-bar of the 6th switching tube, 3rd termination negative busbar of the 7th switching tube, 3rd end of the 6th switching tube is connected with the second end of the 7th switching tube, the first end of energy storage inductor L4 connects the 3rd end of the 6th switching tube, second end of energy storage inductor L4 is the ac output end (OUT-LINE) of described UPS module, and the first end of filter capacitor C3 connects second end of energy storage inductor L4, the second termination center line of filter capacitor C3.
The following describes the operation principle of the UPS module of this embodiment, what first illustrate at this is, the operation principle of the inversion unit in this embodiment is identical with the operation principle that a wherein cross streams of the inversion unit in the embodiment shown in Fig. 3 exports, do not repeat at this, the course of work of the commutation phase when electric main is normal and abnormal be only described below:
When electric main is normal, now Closing Switch S1, cut-off switch S3, rectification has following four-stage: during the positive half cycle of (1) electric main (LINE), Q1 is open-minded for IGBT pipe, electric main by switch S 1, IGBT pipe Q1, with the antiparallel diode of IGBT pipe Q2 be energy storage inductor L1 energy storage; (2), during the positive half cycle of electric main (LINE), IGBT pipe Q1 turns off, and electric main is that filter capacitor C1 charges by switch S 1, diode D1; (3), during the negative half period of electric main (LINE), Q2 is open-minded for IGBT pipe, and electric main is energy storage inductor L1 energy storage by IGBT pipe Q2, with the antiparallel diode of IGBT pipe Q1, switch S 1; (4) during the negative half period of electric main (LINE), IGBT pipe Q2 turns off, and electric main is charged for filter capacitor C2 by diode D2, switch S 1.
When electric main is abnormal, now cut-off switch S1, Closing Switch S3, rectification has following four-stage: (1) IGBT pipe Q5 keeps turning off, Q1 is open-minded for IGBT pipe, battery pack export direct current by switch S 3, IGBT pipe Q1, with the antiparallel diode of IGBT pipe Q2 be energy storage inductor L1 energy storage; (2) IGBT pipe Q5 keeps turning off, and IGBT pipe Q1 turns off, and the direct current that battery pack exports is charged to filter capacitor C1 by switch S 3, diode D1; (3), when IGBT pipe Q5 opens, the direct current that battery pack exports is energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turns off, energy storage inductor L3 is that filter capacitor C2 charges by diode D5.
Fig. 5 is the circuit diagram of UPS module embodiments four of the present invention, and in this embodiment, electric main is single-phase, and this UPS module comprises PFC rectification unit 100, inversion unit 200, DC/DC converter unit 300.Described hereinly be, the circuit structure of the DC/DC converter unit 300 in this embodiment is identical with the circuit structure of the DC/DC converter unit in the embodiment two shown in Fig. 3, inversion unit 300 is identical with the circuit structure of the inversion unit of the embodiment shown in Fig. 4 three kinds, do not repeat at this, below different places be only described:
In this PFC rectification unit 100, PFC rectification unit 100 comprises energy storage inductor L1, diode D1, diode D2, diode D3, diode D4, the first switching tube of anti-paralleled diode, the second switch pipe of anti-paralleled diode, filter capacitor C1, filter capacitor C2.Certainly, in another embodiment, can save with the first switching tube and the antiparallel diode of second switch pipe.In this embodiment, the first switching tube, second switch pipe select IGBT pipe Q1, Q2 respectively.In this PFC rectification unit 100, the first end of energy storage inductor L1 connects the output of electric main (LINE), second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D2 respectively, the negative pole of diode D1 connects the positive pole of diode D3, the negative pole positive bus-bar of diode D3, the positive pole of diode D2 connects the negative pole of diode D4, the positive pole of diode D4 connects negative busbar, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump, second end of the first switching tube connects the negative pole of diode D1, the positive pole of the 3rd terminating diode D2 of second switch pipe, 3rd end of the first switching tube and the second end of second switch pipe connect center line in the lump.
The following describes the operation principle of the UPS module of this embodiment, what first illustrate at this is, the operation principle of the inversion unit in this embodiment is identical with the operation principle of the inversion unit in the embodiment shown in Fig. 4, do not repeat at this, the course of work of the commutation phase when electric main is normal and abnormal be only described below:
When electric main is normal, now Closing Switch S1, cut-off switch S3, rectification has following four-stage: during the positive half cycle of (1) electric main (LINE), Q1 is open-minded for IGBT pipe, and electric main is energy storage inductor L1 energy storage by switch S 1, diode D1, IGBT pipe Q1; (2), during the positive half cycle of electric main (LINE), IGBT pipe Q1 turns off, and electric main is that filter capacitor C1 charges by switch S 1, diode D1, diode D3; (3), during the negative half period of electric main (LINE), Q2 is open-minded for IGBT pipe, and electric main is energy storage inductor L1 energy storage by IGBT pipe Q2, diode D2, switch S 1; (4) during the negative half period of electric main (LINE), IGBT pipe Q2 turns off, and electric main is charged for filter capacitor C2 by diode D4, diode D2, switch S 1.
When electric main is abnormal, now cut-off switch S1, Closing Switch S3, rectification has following four-stage: (1) IGBT pipe Q5 keeps turning off, Q1 is open-minded for IGBT pipe, and the direct current that battery pack exports is energy storage inductor L1 energy storage by switch S 3, diode D1, IGBT pipe Q1; (2) IGBT pipe Q5 keeps turning off, and IGBT pipe Q1 turns off, and the direct current that battery pack exports is charged to filter capacitor C1 by switch S 3, diode D1, diode D3; (3), when IGBT pipe Q5 opens, the direct current that battery pack exports is energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turns off, energy storage inductor L3 is that filter capacitor C2 charges by diode D5.
Fig. 6 is the circuit diagram of UPS module embodiments five of the present invention, and in this embodiment, electric main is single-phase, and this UPS module comprises PFC rectification unit 100, inversion unit 200, DC/DC converter unit 300.Described hereinly be, the circuit structure of the DC/DC converter unit 300 in this embodiment is identical with the circuit structure of the DC/DC converter unit in the embodiment two shown in Fig. 3, inversion unit 300 is identical with the circuit structure of the inversion unit of the embodiment shown in Fig. 4 three kinds, do not repeat at this, below different places be only described:
In this PFC rectification unit 100, PFC rectification unit 100 comprises energy storage inductor L1, diode rectifier bridge B1, diode D1, diode D2, the first switching tube of anti-paralleled diode, filter capacitor C1, filter capacitor C2.In this embodiment, the first switching tube selects IGBT pipe Q1.In this PFC rectification unit 100, the first end of energy storage inductor L1 connects the output (LINE) of electric main, second end of energy storage inductor L1 connects second end of diode rectifier bridge B1, the positive pole of diode D1 and the negative pole of diode D2, second end of diode rectifier bridge B1, 4th end connects center line, the first end of diode rectifier bridge B1 connects the second end of the first switching tube, 4th end of the three-terminal link diode rectifier bridge B1 of the first switching tube, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump.
The following describes the operation principle of the UPS module of this embodiment, what first illustrate at this is, the operation principle of the inversion unit in this embodiment is identical with the operation principle of the inversion unit in the embodiment shown in Fig. 4, do not repeat at this, the course of work of the commutation phase when electric main is normal and abnormal be only described below:
When electric main is normal, now Closing Switch S1, cut-off switch S3, rectification has following four-stage: during the positive half cycle of (1) electric main (LINE), Q1 is open-minded for IGBT pipe, and electric main is energy storage inductor L1 energy storage by switch S 1, diode rectifier bridge B1, IGBT pipe Q1; (2), during the positive half cycle of electric main (LINE), IGBT pipe Q1 turns off, and electric main is that filter capacitor C1 charges by switch S 1, diode D1; (3), during the negative half period of electric main (LINE), Q1 is open-minded for IGBT pipe, and electric main is energy storage inductor L1 energy storage by diode rectifier bridge B1, IGBT pipe Q1, switch S 1; (4) during the negative half period of electric main (LINE), IGBT pipe Q1 turns off, and electric main is charged for filter capacitor C2 by diode D2, switch S 1.
When electric main is abnormal, now cut-off switch S1, Closing Switch S3, rectification has following four-stage: (1) IGBT pipe Q5 keeps turning off, Q1 is open-minded for IGBT pipe, and the direct current that battery pack exports is energy storage inductor L1 energy storage by switch S 3, diode rectifier bridge B1, IGBT pipe Q1; (2) IGBT pipe Q5 keeps turning off, and IGBT pipe Q1 turns off, and the direct current that battery pack exports is charged to filter capacitor C1 by switch S 3, diode D1; (3), when IGBT pipe Q5 opens, the direct current that battery pack exports is energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turns off, energy storage inductor L3 is that filter capacitor C2 charges by diode D5.
Fig. 7 is the circuit diagram of UPS module embodiments six of the present invention, and in this embodiment, electric main is three-phase, and this UPS module comprises PFC rectification unit 100, inversion unit 200, DC/DC converter unit 300.Described hereinly be, the circuit structure of the DC/DC converter unit 300 in this embodiment is identical with the circuit structure of the DC/DC converter unit in the embodiment two shown in Fig. 3, inversion unit 300 is identical with the circuit structure of the inversion unit of the embodiment shown in Fig. 4 three kinds, do not repeat at this, below different places be only described:
In this PFC rectification unit 100, PFC rectification unit 100 comprises three-phase diode rectifier bridge B1B1, energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, the first switching tube of anti-paralleled diode, the second switch pipe of anti-paralleled diode, filter capacitor C1, filter capacitor C2.In this embodiment, the first switching tube, second switch pipe select IGBT pipe Q1, Q2 respectively.Certainly, in another embodiment, can save with the first switching tube and the antiparallel diode of second switch pipe.In this PFC rectification unit 100, the three-phase input end of three-phase diode rectifier bridge B1 is respectively by switch S 1, S2, S4 connects three-phase alternating current civil power (LINE1, LINE2, LINE3), first output of three-phase diode rectifier bridge B1 connects the first end of energy storage inductor L1, second end of energy storage inductor L1 connects the positive pole of diode D1, the negative pole of diode D1 connects positive bus-bar, second output of three-phase diode rectifier bridge connects the first end of energy storage inductor L2, second end of energy storage inductor L2 connects the negative pole of diode D2, the positive pole of diode D2 connects negative busbar, second end of the first switching tube connects the positive pole of diode D1, the negative pole of the three-terminal link diode D2 of second switch pipe, 3rd end of the first switching tube and the second end of second switch pipe connect center line in the lump, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump.
The following describes the operation principle of the UPS module of this embodiment, what first illustrate at this is, the operation principle of the inversion unit in this embodiment is identical with the operation principle of the inversion unit in the embodiment shown in Fig. 4, do not repeat at this, the course of work of the commutation phase when electric main is normal and abnormal be only described below:
When electric main is normal, now Closing Switch S1, S2, S4, cut-off switch S3, rectification has following four-stage: during the positive half cycle of (1) three-phase alternating current civil power, Q1 is open-minded for IGBT pipe, and three-phase alternating current civil power is energy storage inductor L1 energy storage respectively by each self-corresponding switch, three-phase diode rectifier bridge B1, IGBT pipe Q1; (2), during the positive half cycle of three-phase alternating current civil power, IGBT pipe Q1 turns off, and three-phase alternating current civil power is that filter capacitor C1 charges respectively by switch S 1, S2, S4, diode D1; (3), during the negative half period of three-phase alternating current civil power, Q2 is open-minded for IGBT pipe, and three-phase alternating current civil power is energy storage inductor L1 energy storage by IGBT pipe Q2, three-phase diode rectifier bridge B1, each self-corresponding switch; (4), during the negative half period of three-phase alternating current civil power, IGBT pipe Q2 turns off, and three-phase alternating current civil power is that filter capacitor C2 charges by diode D2, three-phase diode rectifier bridge B1, each self-corresponding switch.
When electric main is abnormal, now cut-off switch S1, S2, S4, Closing Switch S3, rectification has following four-stage: (1) IGBT pipe Q5 keeps turning off, Q1 is open-minded for IGBT pipe, and the direct current that battery pack exports is energy storage inductor L1 energy storage by switch S 3, IGBT pipe Q1; (2) IGBT pipe Q5 keeps turning off, and IGBT pipe Q1 turns off, and the direct current that battery pack exports is charged to filter capacitor C1 by switch S 3, diode D1; (3), when IGBT pipe Q5 opens, the direct current that battery pack exports is energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turns off, energy storage inductor L3 is that filter capacitor C2 charges by diode D5.
More than just several specific embodiment of the present invention, only for explaining claim, the scope be not intended to limit the present invention, such as, the inversion unit that inversion unit can adopt single-phase, the two-phase of two level, T-shaped or I type three-level structure or three-phase to export.And the inversion unit of different structure can carry out multiple combination with the PFC rectification unit of different structure, this is also in protection scope of the present invention.In addition, all switches mentioned by the present invention all can preferred relay switch.
The present invention also constructs a kind of ups system, comprise battery pack and UPS module, this UPS module can be the UPS module in above-mentioned any embodiment, the quantity of the UPS module in this ups system can be one, also can be multiple, when the quantity of UPS module is multiple, the plurality of UPS is arranged in parallel, and shares this battery pack.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (9)
1. a UPS module, for carrying out discharge and recharge to battery pack, described UPS module comprises the PFC rectification unit and inversion unit that connect successively, and described PFC rectification unit is used for just being when electric main is normal, negative busbar is charged, it is characterized in that, described UPS module also comprises DC/DC converter unit, described DC/DC converter unit comprises BUCK-BOOST circuit and the first switch (S3), when electric main is abnormal, closed described first switch (S3), described DC/DC converter unit is positive bus-bar charging by described PFC rectification unit, and be negative busbar charging by described BUCK-BOOST circuit, described PFC rectification unit and described DC/DC converter unit have coupling circuit,
Described BUCK-BOOST circuit comprises the 5th switching tube, diode D5 and energy storage inductor L3, wherein, the first end of the first switch (S3) connects the positive pole of battery pack, the negative pole of battery pack connects center line, second end of the first switch (S3) connects the input of described PFC rectification unit, the positive pole of the second termination battery pack of the 5th switching tube, the first end of the three-terminal link energy storage inductor L3 of the 5th switching tube, the second termination center line of energy storage inductor L3, the positive pole of diode D5 connects negative busbar, and the negative pole of diode D5 connects second end of energy storage inductor L3; Wherein, described 5th switching tube is IGBT pipe.
2. UPS module according to claim 1, is characterized in that, described first switch (S3) is relay switch.
3. the UPS module according to any one of claim 1-2, it is characterized in that, described electric main is two-phase, described PFC rectification unit comprises energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, diode D3, diode D4, the first switching tube of anti-paralleled diode, the second switch pipe of anti-paralleled diode, the 3rd switching tube of anti-paralleled diode, the 4th switching tube of anti-paralleled diode, filter capacitor C1, filter capacitor C2, wherein, the first end of energy storage inductor L1 connects the output of first-phase electric main, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D3 respectively, the first end of energy storage inductor L2 connects the output of second-phase electric main, second end of energy storage inductor L2 connects the positive pole of diode D2 and the negative pole of diode D4 respectively, the negative pole of diode D1 and the negative pole of diode D2 connect positive bus-bar respectively, the positive pole of diode D3 and the positive pole of diode D4 connect negative busbar respectively, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump, second end of the first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, 3rd end of the first switching tube is connected with the 3rd end of second switch pipe, second end of the 3rd switching tube connects the negative pole of diode D4, second end of the 4th switching tube connects center line, 3rd end of the 3rd switching tube is connected with the 3rd end of the 4th switching tube.
4. the UPS module according to any one of claim 1-2, it is characterized in that, described PFC rectification unit comprises energy storage inductor L1, diode D1, diode D2, the first switching tube of anti-paralleled diode, the second switch pipe of anti-paralleled diode, filter capacitor C1, filter capacitor C2, wherein, the first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D2 respectively, the negative pole of diode D1 connects positive bus-bar, the positive pole of diode D2 connects negative busbar, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump, second end of the first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, 3rd end of the first switching tube is connected with the 3rd end of second switch pipe.
5. the UPS module according to any one of claim 1-2, it is characterized in that, described PFC rectification unit comprises energy storage inductor L1, diode D1, diode D2, diode D3, diode D4, the first switching tube, second switch pipe, filter capacitor C1, filter capacitor C2, wherein, the first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D2 respectively, the negative pole of diode D1 connects the positive pole of diode D3, the negative pole of diode D3 connects positive bus-bar, the positive pole of diode D2 connects the negative pole of diode D4, the positive pole of diode D4 connects negative busbar, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump, second end of the first switching tube connects the negative pole of diode D1, the positive pole of the 3rd terminating diode D2 of second switch pipe, 3rd end of the first switching tube and the second end of second switch pipe connect center line in the lump.
6. the UPS module according to any one of claim 1-2, it is characterized in that, described PFC rectification unit comprises energy storage inductor L1, diode rectifier bridge, diode D1, diode D2, the first switching tube of anti-paralleled diode, filter capacitor C1, filter capacitor C2, wherein, the first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects the second end of diode rectifier bridge respectively, the positive pole of diode D1 and the negative pole of diode D2, second end of diode rectifier bridge, 4th end connects center line, the first end of diode rectifier bridge connects the second end of the first switching tube, 4th end of the three-terminal link diode rectifier bridge of the first switching tube, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump.
7. the UPS module according to any one of claim 1-2, it is characterized in that, described electric main is three-phase, described PFC rectification unit comprises three-phase diode rectifier bridge, energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, the first switching tube, second switch pipe, filter capacitor C1, filter capacitor C2, wherein, the three-phase input end of described three-phase diode rectifier bridge connects three-phase alternating current civil power respectively, first output of three-phase diode rectifier bridge connects the first end of energy storage inductor L1, second end of energy storage inductor L1 connects the positive pole of diode D1, the negative pole of diode D1 connects positive bus-bar, second output of three-phase diode rectifier bridge connects the first end of energy storage inductor L2, second end of energy storage inductor L2 connects the negative pole of diode D2, the positive pole of diode D2 connects negative busbar, second end of the first switching tube connects the positive pole of diode D1, the negative pole of the three-terminal link diode D2 of second switch pipe, 3rd end of the first switching tube and the second end of second switch pipe connect center line in the lump, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, the negative pole of filter capacitor C1 and the positive pole of filter capacitor C2 connect center line in the lump.
8. UPS module according to claim 1, is characterized in that, described inversion unit is two level inverter circuits, I type three-level inverter circuit or T-shaped three-level inverter circuit.
9. a ups system, comprise battery pack and a UPS module or at least two UPS modules be in parallel, it is characterized in that, described UPS module is the UPS module described in any one of claim 1-8.
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