CN103187785A - UPS module and UPS system - Google Patents
UPS module and UPS system Download PDFInfo
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- CN103187785A CN103187785A CN201110443890XA CN201110443890A CN103187785A CN 103187785 A CN103187785 A CN 103187785A CN 201110443890X A CN201110443890X A CN 201110443890XA CN 201110443890 A CN201110443890 A CN 201110443890A CN 103187785 A CN103187785 A CN 103187785A
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Abstract
The invention discloses a UPS (Uninterrupted Power Supply) module and a UPS system. The UPS module comprises a PFC (Power Factor Correction) rectification unit and an inversion unit that are sequentially connected, wherein the PFC rectification unit is used for charging a positive busbar and a negative busbar when an alternating current mains supply is normal; the UPS module further comprises a DC/DC (direct current/direct current) conversion unit; the DC/DC conversion unit comprises a BUCK-BOOST circuit; and when the alternating current mains supply is abnormal, the DC/DC conversion unit charges the positive busbar through the PFC rectification unit, and the negative busbar through the BUCK-BOOST circuit. With the implementation of the technical scheme, when the alternating current mains supply is normal or abnormal, an upper bridge arm of the PFC rectification unit is shared, so that the UPS module is not required to adopt an isolation boosting transformer when using a battery pack, the space and cost are saved, the miniaturization trend of a switch power supply is followed, and the loss is reduced. In addition, since the DC/DC conversion unit and the PFC rectification unit are provided with a coupling circuit, a part of devices of the PFC rectification unit are utilized, the cost is saved, and the efficiency is improved.
Description
Technical field
The present invention relates to power electronic technology, relate in particular to a kind of UPS module and ups system.
Background technology
UPS (Uninterruptible Power Supply, uninterrupted power supply) is widely used in a plurality of industries such as electric power, telecommunications, finance, government, manufacturing, it can ensure after having a power failure and work on a period of time, make the user unlikely because power failure influences work or obliterated data, can also eliminate " power pollutions " such as surge on the civil power, instant high-voltage, moment low-voltage, electric wire noise and frequency shift (FS)s.
At present, in the ups system design of middle low power, in order to solve the problem of a plurality of UPS modules CB common battery group when in parallel, as shown in Figure 1, traditional method is that DC/DC converter unit 300 is designed to the isolation boosting circuit, after for example adopting isolating transformer T1 among Fig. 1 to boost, directly export dc bus to, after inversion unit 200 inversions, export load to then.DC/DC converter unit 300 and the PFC rectification unit 100 of the benefit of this scheme are kept apart and not coupling fully, improve the reliability of system.But in fact, this complete isolation 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, efficient are low;
2, DC/DC converter unit 300 is isolated fully with PFC rectification unit 100, does not have coupling circuit, can't utilize PFC rectification unit 100 during the DC pattern, and cost and efficient can't be accomplished optimum;
3, this quantity and the volume that just cause transformer T1 of isolating fully increases, and not only taken the space but also increased cost, and 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, and is big at the above-mentioned UPS module cost of prior art, the space is big, and ineffective defective, provides that a kind of cost is little, the space is little and the UPS module of high efficiency.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of UPS module, be used for battery pack is discharged and recharged, described UPS module comprises PFC rectification unit and the inversion unit that connects successively, and described PFC rectification unit is used at electric main just often for just, negative busbar is charged, described UPS module also comprises the DC/DC converter unit, described DC/DC converter unit comprises the BUCK-BOOST circuit, when electric main is unusual, described DC/DC converter unit is positive bus-bar charging by described PFC rectification unit, and is the negative busbar charging by described BUCK-BOOST circuit.
In UPS module of the present invention, described DC/DC converter unit also comprises first switch, described BUCK-BOOST circuit comprises the 5th switching tube, diode D5 and energy storage inductor L3, wherein, first end of first switch connects the positive pole of battery pack, the negative pole of battery pack connects center line, second end of 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 3rd end of the 5th switching tube connects first end of energy storage inductor L3, 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.
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 first switching tube, the second switch pipe of inverse parallel diode, the 3rd switching tube of inverse parallel diode, the 4th switching tube of inverse parallel diode, the filter capacitor C1 of energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, diode D3, diode D4, inverse parallel diode, filter capacitor C2; Wherein, first end of energy storage inductor L1 connects the output of the first cross streams civil power, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D3 respectively, first end of energy storage inductor L2 connects the output of the second cross streams civil power, 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 the negative pole of diode D1 and diode D2 connects positive bus-bar respectively, the positive pole of the positive pole of diode D3 and diode D4 connects 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump, second end of first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, the 3rd end of first switching tube links to each other 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, and the 3rd end of the 3rd switching tube links to each other with the 3rd end of the 4th switching tube.
In UPS module of the present invention, described PFC rectification unit comprises first switching tube, the second switch pipe of inverse parallel diode, the filter capacitor C1 of energy storage inductor L1, diode D1, diode D2, inverse parallel diode, filter capacitor C2; Wherein, 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump, second end of first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, and the 3rd end of first switching tube links to each other 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, first switching tube, second switch pipe, filter capacitor C1, filter capacitor C2; Wherein, 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump, second end of first switching tube connects the negative pole of diode D1, the positive pole of the 3rd terminating diode D2 of second switch pipe, the 3rd end of first switching tube and second end of second switch pipe connect center line in the lump.
In UPS module of the present invention, described PFC rectification unit comprises first switching tube, filter capacitor C1, the filter capacitor C2 of energy storage inductor L1, diode rectifier bridge, diode D1, diode D2, inverse parallel diode; Wherein, first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects second end of diode rectifier bridge, the positive pole of diode D1 and the negative pole of diode D2 respectively, second end of diode rectifier bridge, the 4th end connect center line, first end of diode rectifier bridge connects second end of first switching tube, the 3rd end of first switching tube connects the 4th end of diode rectifier bridge, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, and the positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects 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, 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 the three-phase alternating current civil power respectively, first output of three-phase diode rectifier bridge connects 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 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 first switching tube connects the positive pole of diode D1, the 3rd end of second switch pipe connects the negative pole of diode D2, the 3rd end of first switching tube and 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, and the positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump.
In UPS module of the present invention, described inversion unit is two level inverter circuits, I type tri-level inversion circuit or T type tri-level inversion circuit.
The present invention also constructs a kind of ups system, comprises battery pack and a UPS module or at least two UPS modules that are in parallel, and described UPS module is above-described UPS module.
Implement technical scheme of the present invention; when electric main is normal or unusual; the PFC rectification unit shares, so PFC rectification unit and DC/DC converter unit have coupling circuit, also is non-isolation; this just makes the UPS module when using battery pack; need not to adopt the isolation boosting transformer, saved space and cost, complied with the trend of Switching Power Supply miniaturization; and reduced loss, improved efficient.In addition, DC/DC converter unit and PFC rectification unit utilize partial PFC rectification unit device because coupling circuit is arranged, and provide cost savings, and have improved efficient.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the 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 embodiment one of the present invention;
Fig. 3 is the circuit diagram of UPS module embodiment two of the present invention;
Fig. 4 is the circuit diagram of UPS module embodiment three of the present invention;
Fig. 5 is the circuit diagram of UPS module embodiment four of the present invention;
Fig. 6 is the circuit diagram of UPS module embodiment five of the present invention;
Fig. 7 is the circuit diagram of UPS module embodiment six of the present invention.
Embodiment
As shown in Figure 2, in the building-block of logic of UPS module embodiment 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 just often, electric main (LINE) obtains direct voltage by 100 rectifications of PFC rectification unit, inversion unit 200 is alternating voltage with this direct voltage inversion, to reach by the charger (not shown) to batteries charging to the power supply of load (not shown).When electric main was unusual, DC/DC converter unit 300 was the positive bus-bar charging by PFC rectification unit 100, and was the negative busbar charging by BUCK-BOOST circuit 301.Implement this technical scheme; when electric main is normal or unusual; the PFC rectification unit shares, so PFC rectification unit 100 has coupling circuit with DC/DC converter unit 300, also is non-isolation; this just makes the UPS module when using battery pack; need not to adopt the isolation boosting transformer, saved space and cost, complied with the trend of Switching Power Supply miniaturization; and reduced loss, improved efficient.In addition, DC/DC converter unit 300 and PFC rectification unit 100 utilize partial PFC rectification unit device because coupling circuit is arranged, and provide cost savings, and have improved efficient.
Fig. 3 is the circuit diagram of UPS module embodiment 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. the PFC rectification unit 100
In this PFC rectification unit 100, the PFC rectification unit comprises first switching tube, the second switch pipe of inverse parallel diode, the 3rd switching tube of inverse parallel diode, the 4th switching tube of inverse parallel diode, the filter capacitor C1 of energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, diode D3, diode D4, inverse parallel diode, filter capacitor C2.This explanation be, all mentioned switching tubes of the present invention all can be selected IGBT pipe for use, for example, first switching tube in the present embodiment, second switch pipe, the 3rd switching tube, the 4th switching tube are selected IGBT pipe Q1, Q2, Q3, Q4 for use.Certainly, in other lower embodiment of power requirement, also can select metal-oxide-semiconductor for use.When switching tube is selected the IGBT pipe for use, second end of switching tube is its collector electrode, and the 3rd end of switching tube is its emitter, and first end of switching tube is its gate-drive utmost point, and connect the control circuit (not shown), this control circuit is used for break-make frequency and the make-and-break time of each switching tube of control.In this PFC rectification unit 100, the output of the first cross streams civil power (LINE1) is by first end of switch S 1 connection energy storage inductor L1, and the output of the second cross streams civil power (LINE2) connects 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 the negative pole of diode D1 and diode D2 connects positive bus-bar (BUS+) respectively, the positive pole of the positive pole of diode D3 and diode D4 connects 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line (NEUTRAL) in the lump, second end of first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, the 3rd end of first switching tube links to each other 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, and the 3rd end of the 3rd switching tube links to each other with the 3rd end of the 4th switching tube;
2, inversion unit 200
This inversion unit 200 comprises the 6th switching tube, the 7th switching tube of inverse parallel diode, the 8th switching tube of inverse parallel diode, the 9th switching tube of inverse parallel diode, energy storage inductor L4, energy storage inductor L5, filter capacitor C3, the filter capacitor C4 of inverse parallel diode.In this embodiment, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube are selected IGBT pipe Q6, Q7, Q8, Q9 respectively for use.In this inversion unit, second end of the 6th switching tube and second end of the 8th switching tube connect positive bus-bar respectively, the 3rd end of the 7th switching tube and the 3rd end of the 9th switching tube connect negative busbar respectively, the 3rd end of the 6th switching tube is connected with second end of the 7th switching tube, the 3rd end of the 8th switching tube is connected with second end of the 9th switching tube, 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 cross streams output (OUT-LINE1) of described UPS module, 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 cross streams output (OUT-LINE2) of described UPS module, first end of filter capacitor C3 connects second end of energy storage inductor L4, first end of filter capacitor C4 connects first end of energy storage inductor L5, and 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-phases output;
3, the DC/DC converter unit 300
This DC/DC converter unit 300 comprises switch S 3 and BUCK-BOOST circuit, and wherein, the BUCK-BOOST circuit comprises the 5th switching tube, diode D5 and the energy storage inductor L3 of inverse parallel diode.Certainly, in another embodiment, can save with the antiparallel diode of the 5th switching tube.In this embodiment, the 5th switching tube is selected IGBT pipe Q5 for use.In this DC/DC converter unit 300, 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 first end of energy storage inductor L1, the positive pole of the second termination battery pack of the 5th switching tube, the 3rd end of the 5th switching tube connects first end of energy storage inductor L3, 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 just often, Closing Switch S1, S2, cut-off switch S3, be the load power supply by electric main after by rectification, inversion, be specially: in commutation phase, for the electric main of first phase, following four-stage is arranged: during the positive half cycle of the electric main of (1) first phase (LINE1), Q1 is open-minded for the IGBT pipe, and electric main is managed Q1, managed the antiparallel diode of Q2 with IGBT by switch S 1, IGBT is energy storage inductor L1 energy storage; During the positive half cycle of the electric main of (2) first phases (LINE1), IGBT pipe Q1 turn-offs, and electric main is filter capacitor C1 charging by switch S 1, diode D1; During the negative half period of the electric main of (3) first phases (LINE1), Q2 is open-minded for the IGBT pipe, and electric main is managed Q2, is energy storage inductor L1 energy storage with the antiparallel diode of IGBT pipe Q1, switch S 1 by IGBT; During the negative half period of the electric main of (4) first phases (LINE1), IGBT pipe Q2 turn-offs, and electric main charges for filter capacitor C2 by diode D3, switch S 1.Similarly, electric main (LINE2) for second phase, following four-stage is also arranged: during the positive half cycle of the electric main of (1) second phase (LINE2), Q3 is open-minded for the IGBT pipe, and electric main is managed Q3, managed the antiparallel diode of Q4 with IGBT by switch S 2, IGBT is energy storage inductor L2 energy storage; During the positive half cycle of the electric main of (2) second phases (LINE2), IGBT pipe Q3 turn-offs, and electric main is filter capacitor C1 charging by switch S 2, diode D2; During the negative half period of the electric main of (3) second phases (LINE2), Q4 is open-minded for the IGBT pipe, and electric main is managed Q4, is energy storage inductor L2 energy storage with the antiparallel diode of IGBT pipe Q3, switch S 2 by IGBT; During the negative half period of the electric main of (4) second phases (LINE2), IGBT pipe Q4 turn-offs, and electric main charges for filter capacitor C2 by diode D4, switch S 2.In the inversion stage, output AC electricity (OUT-LINE1) for first phase, following four-stage is arranged: the positive half cycle of (1) output AC electricity, Q6 is open-minded for the IGBT pipe, and filter capacitor C1 manages Q6, filter capacitor C1 by IGBT and manages Q6, filter capacitor C3 energy storage inductor L4 energy storage by IGBT; (2) the positive half cycle of output AC electricity, IGBT pipe Q6 turn-offs, and energy storage inductor L4 is by managing the antiparallel diode of Q7, filter capacitor C2, C3 afterflow with IGBT; (3) negative half period of output AC electricity, Q7 is open-minded for the IGBT pipe, and it is energy storage inductor L4 energy storage that filter capacitor C2 manages Q7, filter capacitor C3 by IGBT; (4) negative half period of output AC electricity, IGBT pipe Q7 turn-offs, and energy storage inductor L4 is by managing the antiparallel diode of Q6, filter capacitor C1, filter capacitor C3 afterflow with IGBT.The inversion principle of the second phase output AC electricity (OUT-LINE1) is identical with the inversion principle of the output AC electricity of first phase, does not do at this and gives unnecessary details.
When electric main is unusual, this moment cut-off switch S1, S2, Closing Switch S3, by battery pack by rectification, be the load power supply after the inversion, should be noted that, (electric main just often) was the same in the course of work in inversion stage when (when electric main is unusual) powered with electric main when battery-powered, do not do at this and to give unnecessary details, the course of work in commutation phase below only is described when battery-powered, total following several stages: (1) IGBT pipe Q5 keeps turn-offing, Q1 is open-minded for the IGBT pipe, and the direct current of battery pack output is by switch S 3, IGBT manages Q1, managing the antiparallel diode of Q2 with IGBT is energy storage inductor L1 energy storage; (2) IGBT pipe Q5 keeps turn-offing, and IGBT pipe Q1 turn-offs, and the direct current of battery pack output is given filter capacitor C1 charging by switch S 3, diode D1; When (3) IGBT pipe Q5 opened, the direct current of battery pack output was energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turn-offs, energy storage inductor L3 is filter capacitor C2 charging by diode D5.
Fig. 4 is the circuit diagram of UPS module embodiment 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.In this explanation is that the circuit structure of the DC/DC converter unit among the circuit structure of the DC/DC converter unit 300 among this embodiment and the embodiment two shown in Figure 3 is identical, does not do at this and gives unnecessary details, and below different places only is described:
In this PFC rectification unit 100, PFC rectification unit 100 comprises first switching tube, the second switch pipe of inverse parallel diode, the filter capacitor C1 of energy storage inductor L1, diode D1, diode D2, inverse parallel diode, filter capacitor C2.In this embodiment, first switching tube, second switch pipe are selected IGBT pipe Q1, Q2 respectively for use.Wherein, 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump, second end of first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, and the 3rd end of first switching tube links to each other with the 3rd end of second switch pipe.
In this inversion unit 200, inversion unit 200 comprises the 6th switching tube, the 7th switching tube of inverse parallel diode, energy storage inductor L4, the filter capacitor C3 of inverse parallel diode.In this embodiment, the 6th switching tube, the 7th switching tube are selected IGBT pipe Q6, Q7 respectively for use.In this inversion unit, the second termination positive bus-bar of the 6th switching tube, the 3rd termination negative busbar of the 7th switching tube, the 3rd end of the 6th switching tube is connected with second end of the 7th switching tube, 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 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 this at first illustrated be, the operation principle of the wherein cross streams output of the inversion unit among the operation principle of the inversion unit among this embodiment and the embodiment shown in Figure 3 is identical, do not do at this and to give unnecessary details, below the course of work of commutation phase when electric main is normal and unusual only is described:
When electric main just often, this moment 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 the IGBT pipe, and electric main is managed Q1, managed the antiparallel diode of Q2 with IGBT by switch S 1, IGBT is energy storage inductor L1 energy storage; (2) during the positive half cycle of electric main (LINE), IGBT pipe Q1 turn-offs, and electric main is filter capacitor C1 charging by switch S 1, diode D1; (3) during the negative half period of electric main (LINE), Q2 is open-minded for the IGBT pipe, and electric main is managed Q2, is energy storage inductor L1 energy storage with the antiparallel diode of IGBT pipe Q1, switch S 1 by IGBT; (4) during the negative half period of electric main (LINE), IGBT pipe Q2 turn-offs, and electric main charges for filter capacitor C2 by diode D2, switch S 1.
When electric main is unusual, this moment cut-off switch S1, Closing Switch S3, rectification has following four-stage: (1) IGBT pipe Q5 keeps turn-offing, Q1 is open-minded for the IGBT pipe, and the direct current of battery pack output is managed Q1, managed the antiparallel diode of Q2 with IGBT by switch S 3, IGBT is energy storage inductor L1 energy storage; (2) IGBT pipe Q5 keeps turn-offing, and IGBT pipe Q1 turn-offs, and the direct current of battery pack output is given filter capacitor C1 charging by switch S 3, diode D1; When (3) IGBT pipe Q5 opened, the direct current of battery pack output was energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turn-offs, energy storage inductor L3 is filter capacitor C2 charging by diode D5.
Fig. 5 is the circuit diagram of UPS module embodiment 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.In this explanation be, the circuit structure of the DC/DC converter unit among the circuit structure of the DC/DC converter unit 300 among this embodiment and the embodiment two shown in Figure 3 is identical, inversion unit 300 is identical with the circuit structure of the inversion unit of three kinds of embodiment shown in Figure 4, do not do at this and to give unnecessary details, below different places only is described:
In this PFC rectification unit 100, PFC rectification unit 100 comprises first switching tube, the second switch pipe of inverse parallel diode, the filter capacitor C1 of energy storage inductor L1, diode D1, diode D2, diode D3, diode D4, inverse parallel diode, filter capacitor C2.Certainly, in another embodiment, can save with first switching tube and the antiparallel diode of second switch pipe.In this embodiment, first switching tube, second switch pipe are selected IGBT pipe Q1, Q2 respectively for use.In this PFC rectification unit 100, 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump, second end of first switching tube connects the negative pole of diode D1, the positive pole of the 3rd terminating diode D2 of second switch pipe, the 3rd end of first switching tube and 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 this at first illustrated be, the operation principle of the inversion unit among the operation principle of the inversion unit among this embodiment and the embodiment shown in Figure 4 is identical, do not do at this and to give unnecessary details, below the course of work of commutation phase when electric main is normal and unusual only is described:
When electric main just often, this moment 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 the 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 turn-offs, and electric main is filter capacitor C1 charging by switch S 1, diode D1, diode D3; (3) during the negative half period of electric main (LINE), Q2 is open-minded for the IGBT pipe, electric main by IGBT manage Q2, diode D2, switch S 1 is energy storage inductor L1 energy storage; (4) during the negative half period of electric main (LINE), IGBT pipe Q2 turn-offs, and electric main charges for filter capacitor C2 by diode D4, diode D2, switch S 1.
When electric main is unusual, this moment cut-off switch S1, Closing Switch S3, rectification have following four-stage: (1) IGBT pipe Q5 maintenance shutoff, Q1 is open-minded for the IGBT pipe, and the direct current of battery pack output is energy storage inductor L1 energy storage by switch S 3, diode D1, IGBT pipe Q1; (2) IGBT pipe Q5 keeps turn-offing, and IGBT pipe Q1 turn-offs, and the direct current of battery pack output is given filter capacitor C1 charging by switch S 3, diode D1, diode D3; When (3) IGBT pipe Q5 opened, the direct current of battery pack output was energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turn-offs, energy storage inductor L3 is filter capacitor C2 charging by diode D5.
Fig. 6 is the circuit diagram of UPS module embodiment 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.In this explanation be, the circuit structure of the DC/DC converter unit among the circuit structure of the DC/DC converter unit 300 among this embodiment and the embodiment two shown in Figure 3 is identical, inversion unit 300 is identical with the circuit structure of the inversion unit of three kinds of embodiment shown in Figure 4, do not do at this and to give unnecessary details, below different places only is described:
In this PFC rectification unit 100, PFC rectification unit 100 comprises first switching tube, filter capacitor C1, the filter capacitor C2 of energy storage inductor L1, diode rectifier bridge B1, diode D1, diode D2, inverse parallel diode.In this embodiment, first switching tube is selected IGBT pipe Q1 for use.In this PFC rectification unit 100, 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 negative pole of the positive pole of diode D1 and diode D2, second end of diode rectifier bridge B1, the 4th end connects center line, first end of diode rectifier bridge B1 connects second end of first switching tube, the 3rd end of first switching tube connects the 4th end of diode rectifier bridge B1, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, and the positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump.
The following describes the operation principle of the UPS module of this embodiment, what this at first illustrated be, the operation principle of the inversion unit among the operation principle of the inversion unit among this embodiment and the embodiment shown in Figure 4 is identical, do not do at this and to give unnecessary details, below the course of work of commutation phase when electric main is normal and unusual only is described:
When electric main just often, this moment 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 the 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 turn-offs, and electric main is filter capacitor C1 charging by switch S 1, diode D1; (3) during the negative half period of electric main (LINE), Q1 is open-minded for the 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 turn-offs, and electric main charges for filter capacitor C2 by diode D2, switch S 1.
When electric main is unusual, this moment cut-off switch S1, Closing Switch S3, rectification have following four-stage: (1) IGBT pipe Q5 maintenance shutoff, Q1 is open-minded for the IGBT pipe, and the direct current of battery pack output is energy storage inductor L1 energy storage by switch S 3, diode rectifier bridge B1, IGBT pipe Q1; (2) IGBT pipe Q5 keeps turn-offing, and IGBT pipe Q1 turn-offs, and the direct current of battery pack output is given filter capacitor C1 charging by switch S 3, diode D1; When (3) IGBT pipe Q5 opened, the direct current of battery pack output was energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turn-offs, energy storage inductor L3 is filter capacitor C2 charging by diode D5.
Fig. 7 is the circuit diagram of UPS module embodiment 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.In this explanation be, the circuit structure of the DC/DC converter unit among the circuit structure of the DC/DC converter unit 300 among this embodiment and the embodiment two shown in Figure 3 is identical, inversion unit 300 is identical with the circuit structure of the inversion unit of three kinds of embodiment shown in Figure 4, do not do at this and to give unnecessary details, below different places only is described:
In this PFC rectification unit 100, PFC rectification unit 100 comprises first switching tube, the second switch pipe of inverse parallel diode, the filter capacitor C1 of three-phase diode rectifier bridge B1B1, energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, inverse parallel diode, filter capacitor C2.In this embodiment, first switching tube, second switch pipe are selected IGBT pipe Q1, Q2 respectively for use.Certainly, in another embodiment, can save with 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 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 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 first switching tube connects the positive pole of diode D1, the 3rd end of second switch pipe connects the negative pole of diode D2, the 3rd end of first switching tube and 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, and the positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump.
The following describes the operation principle of the UPS module of this embodiment, what this at first illustrated be, the operation principle of the inversion unit among the operation principle of the inversion unit among this embodiment and the embodiment shown in Figure 4 is identical, do not do at this and to give unnecessary details, below the course of work of commutation phase when electric main is normal and unusual only is described:
When electric main just often, this moment 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 the IGBT pipe, and the three-phase alternating current civil power is energy storage inductor L1 energy storage by each self-corresponding switch, three-phase diode rectifier bridge B1, IGBT pipe Q1 respectively; (2) during the positive half cycle of three-phase alternating current civil power, IGBT pipe Q1 turn-offs, and the three-phase alternating current civil power is filter capacitor C1 charging by switch S 1, S2, S4, diode D1 respectively; (3) during the negative half period of three-phase alternating current civil power, Q2 is open-minded for the IGBT pipe, the three-phase alternating current civil power by IGBT manage Q2, three-phase diode rectifier bridge B1, each self-corresponding switch is energy storage inductor L1 energy storage; (4) during the negative half period of three-phase alternating current civil power, IGBT pipe Q2 turn-offs, and the three-phase alternating current civil power is filter capacitor C2 charging by diode D2, three-phase diode rectifier bridge B1, each self-corresponding switch.
When electric main is unusual, this moment cut-off switch S1, S2, S4, Closing Switch S3, rectification have following four-stage: (1) IGBT pipe Q5 maintenance shutoff, Q1 is open-minded for the IGBT pipe, and the direct current of battery pack output is energy storage inductor L1 energy storage by switch S 3, IGBT pipe Q1; (2) IGBT pipe Q5 keeps turn-offing, and IGBT pipe Q1 turn-offs, and the direct current of battery pack output is given filter capacitor C1 charging by switch S 3, diode D1; When (3) IGBT pipe Q5 opened, the direct current of battery pack output was energy storage inductor L3 energy storage by IGBT pipe Q5; (4) when IGBT pipe Q5 turn-offs, energy storage inductor L3 is filter capacitor C2 charging by diode D5.
More than be several specific embodiment of the present invention, only be used for explain claim, and be not used in the scope of the present invention that limits, for example, inversion unit can adopt single-phase, the two-phase of two level, T type or I type three level structures or the inversion unit of three-phase output.And the inversion unit of different structure can carry out multiple combination with the PFC rectification unit of different structure, and this is also in protection scope of the present invention.In addition, mentioned all switches of the present invention preferred relay switch all.
The present invention also constructs a kind of ups system, comprise battery pack and UPS module, this UPS module can be the UPS module among above-mentioned arbitrary embodiment, the quantity of the UPS module in this ups system can be one, also can be a plurality of, when being a plurality of, these a plurality of UPS are arranged in parallel in the quantity of UPS module, and share this battery pack.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1. UPS module, be used for battery pack is discharged and recharged, described UPS module comprises PFC rectification unit and the inversion unit that connects successively, and described PFC rectification unit is used for just often charging for positive and negative bus at electric main, it is characterized in that, described UPS module also comprises the DC/DC converter unit, described DC/DC converter unit comprises the BUCK-BOOST circuit, when electric main is unusual, described DC/DC converter unit is positive bus-bar charging by described PFC rectification unit, and is the negative busbar charging by described BUCK-BOOST circuit.
2. UPS module according to claim 1, it is characterized in that, described DC/DC converter unit also comprises first switch (S3), described BUCK-BOOST circuit comprises the 5th switching tube, diode D5 and energy storage inductor L3, wherein, first end of first switch (S3) connects the positive pole of battery pack, the negative pole of battery pack connects center line, second end of 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 3rd end of the 5th switching tube connects first end of energy storage inductor L3, 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.
3. UPS module according to claim 2 is characterized in that, described first switch (S3) is relay switch.
4. according to each described UPS module of claim 1-3, it is characterized in that, described electric main is two-phase, described PFC rectification unit comprises first switching tube, the second switch pipe of inverse parallel diode, the 3rd switching tube of inverse parallel diode, the 4th switching tube of inverse parallel diode, the filter capacitor C1 of energy storage inductor L1, energy storage inductor L2, diode D1, diode D2, diode D3, diode D4, inverse parallel diode, filter capacitor C2; Wherein, first end of energy storage inductor L1 connects the output of the first cross streams civil power, second end of energy storage inductor L1 connects the positive pole of diode D1 and the negative pole of diode D3 respectively, first end of energy storage inductor L2 connects the output of the second cross streams civil power, 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 the negative pole of diode D1 and diode D2 connects positive bus-bar respectively, the positive pole of the positive pole of diode D3 and diode D4 connects 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump, second end of first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, the 3rd end of first switching tube links to each other 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, and the 3rd end of the 3rd switching tube links to each other with the 3rd end of the 4th switching tube.
5. according to each described UPS module of claim 1-3, it is characterized in that, described PFC rectification unit comprises first switching tube, the second switch pipe of inverse parallel diode, the filter capacitor C1 of energy storage inductor L1, diode D1, diode D2, inverse parallel diode, filter capacitor C2; Wherein, 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump, second end of first switching tube connects the positive pole of diode D1, second end of second switch pipe connects center line, and the 3rd end of first switching tube links to each other with the 3rd end of second switch pipe.
6. according to each described UPS module of claim 1-3, it is characterized in that, described PFC rectification unit comprises energy storage inductor L1, diode D1, diode D2, diode D3, diode D4, first switching tube, second switch pipe, filter capacitor C1, filter capacitor C2; Wherein, 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 positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump, second end of first switching tube connects the negative pole of diode D1, the positive pole of the 3rd terminating diode D2 of second switch pipe, the 3rd end of first switching tube and second end of second switch pipe connect center line in the lump.
7. according to each described UPS module of claim 1-3, it is characterized in that described PFC rectification unit comprises first switching tube, filter capacitor C1, the filter capacitor C2 of energy storage inductor L1, diode rectifier bridge, diode D1, diode D2, inverse parallel diode; Wherein, first end of energy storage inductor L1 connects the output of electric main, second end of energy storage inductor L1 connects second end of diode rectifier bridge, the positive pole of diode D1 and the negative pole of diode D2 respectively, second end of diode rectifier bridge, the 4th end connect center line, first end of diode rectifier bridge connects second end of first switching tube, the 3rd end of first switching tube connects the 4th end of diode rectifier bridge, the positive pole of filter capacitor C1 connects positive bus-bar, the negative pole of filter capacitor C2 connects negative busbar, and the positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump.
8. according to each described UPS module of claim 1-3, 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, 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 the three-phase alternating current civil power respectively, first output of three-phase diode rectifier bridge connects 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 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 first switching tube connects the positive pole of diode D1, the 3rd end of second switch pipe connects the negative pole of diode D2, the 3rd end of first switching tube and 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, and the positive pole of the negative pole of filter capacitor C1 and filter capacitor C2 connects center line in the lump.
9. UPS module according to claim 1 is characterized in that, described inversion unit is two level inverter circuits, I type tri-level inversion circuit or T type tri-level inversion circuit.
10. a ups system comprises battery pack and a UPS module or at least two UPS modules that are in parallel, and it is characterized in that, described UPS module is each described UPS module of claim 1-9.
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