CN101699699A - Uninterruptible power supply - Google Patents
Uninterruptible power supply Download PDFInfo
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- CN101699699A CN101699699A CN200910109261A CN200910109261A CN101699699A CN 101699699 A CN101699699 A CN 101699699A CN 200910109261 A CN200910109261 A CN 200910109261A CN 200910109261 A CN200910109261 A CN 200910109261A CN 101699699 A CN101699699 A CN 101699699A
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Abstract
The invention discloses an uninterruptible power supply (UPS), comprising a sub unit. The sub unit comprises a switching module, a first bridge arm, a second bridge arm, a third bridge arm, a first inductor, a bus capacitor and a second inductor; the switching module is used for switching between commercial electricity input and battery input; the first bridge arm is formed by connecting a first controllable switch and a second controllable switch; the second bridge arm is formed by connecting a third controllable switch and a fourth controllable switch; the third bridge arm is formed by connecting a fifth controllable switch and a six controllable switch; the first bridge arm, the second bridge arm and the third bridge arm are respectively cross-connected at two ends of the bus capacitor; the first end of the first capacitor is coupled with the output of the switching module and the second end thereof is coupled with the midpoint of the first bridge arm; the midpoint of the second bridge arm is coupled to the middle line; the first end of the second capacitor is coupled with the midpoint of the third bridge arm and the second end thereof is the output of the sub unit. The inventive UPS only has a single bus, the bus capacitor can be supplemented with energy within the positive and negative halves of the input, the volume of bus capacitor can be reduced, the pressure durability of switching elements can be reduced, and the cost can also be lowered.
Description
Technical field
The present invention relates to a kind of uninterrupted power supply (Uninterruptible Power Supply is called for short UPS).
Background technology
The two conversion UPS of conventional online (On-Line) all have the PFC calibration function, have reached higher input pointer, and power factor is near 1, and input harmonic current is less than 5%.Exchange input through rectifier diode, Boost PFC correcting circuit, with the stabilized input voltage of conversion on higher positive and negative DC B us voltage, half-bridge inversion circuit sinusoidal voltage output that the direct voltage inversion is gone out to need then.The semiconductor device that the weak point of existing UPS is to use is more, and corresponding conducting loss is bigger; Bus capacitor is that (needing two bus circuits) used in series connection, and equivalent capacitance value has only half; Because positive and negative Bus voltage is arranged, the voltage stress on the switching tube of inversion is 2 times of monolateral busbar voltage, makes the cost of inverse switch pipe very high.
Summary of the invention
Technical problem to be solved by this invention is exactly in order to overcome above deficiency, to have proposed the low uninterrupted power supply of a kind of cost.
Technical problem of the present invention is solved by following technical scheme:
A kind of uninterrupted power supply, comprise subelement, described subelement comprises the handover module that is used to switch civil power or battery input, described subelement also comprises first brachium pontis that first gate-controlled switch, second gate-controlled switch link to each other and form, second brachium pontis that the 3rd gate-controlled switch, the 4th gate-controlled switch link to each other and form, the 3rd brachium pontis that the 5th gate-controlled switch, the 6th gate-controlled switch link to each other and form, first inductance, bus capacitor and second inductance; Described first brachium pontis, second brachium pontis and the 3rd brachium pontis are connected across the two ends of described bus capacitor respectively, the mid point coupling of output coupling, second end and first brachium pontis of described first inductance, first end and handover module, the mid point of described second brachium pontis is coupled to center line, and the mid point coupling of described second inductance, first end and the 3rd brachium pontis, second end are the output of subelement.
Described handover module comprises first switch and second switch, first end coupling of described first switch, first end and civil power input coupling, second end and first inductance, described second switch first end and battery input coupling, second end and the coupling of first inductance, first end.
Described uninterrupted power supply also comprises battery, and second end of first end of described battery and the coupling of second switch first end, described battery is coupled to center line.
Described subelement also comprises the 3rd inductance, and the described second brachium pontis mid point is inductively coupled to center line by the described the 3rd.
Described subelement also comprises first electric capacity, and described first electric capacity, first end and the coupling of described first inductance, first end, second end are coupled to center line.
Described subelement also comprises second electric capacity, and described second electric capacity, first end and the coupling of described second inductance, second end, second end are coupled to center line.
Described first gate-controlled switch, second gate-controlled switch, the 3rd gate-controlled switch, the 4th gate-controlled switch, the 5th gate-controlled switch and the 6th gate-controlled switch are respectively metal oxide semiconductor field effect tube.
Described first gate-controlled switch, second gate-controlled switch, the 3rd gate-controlled switch, the 4th gate-controlled switch, the 5th gate-controlled switch and the 6th gate-controlled switch are respectively insulated gate bipolar transistor.
Described first gate-controlled switch, second gate-controlled switch, the 3rd gate-controlled switch, the 4th gate-controlled switch, the 5th gate-controlled switch and the 6th gate-controlled switch are respectively power transistor or turn-off thyristor or MOS control thyristor or static induction transistor or static induction thyristor or integrated gate commutated thyristor.
Described subelement has three, first end of first switch of three subelements and the three-phase of civil power input coupling respectively, first end interconnection of the second switch of three subelements, the center line interconnection of three subelements, three subelements are output as the three-phase output of uninterrupted power supply.
Described subelement has at least two, first end interconnection of first switch of each subelement, first end interconnection of the second switch of each subelement, the center line interconnection of each subelement, the output interconnection of each subelement.
The beneficial effect that the present invention is compared with the prior art is: UPS of the present invention has only single busbar connection, and bus capacitor all can obtain replenishing of energy in the positive-negative half-cycle of input, and the capacity of bus capacitor can reduce, and cost can reduce.Owing to be single busbar connection, the voltage stress of gate-controlled switch has only single busbar connection, same output voltage, and the withstand voltage of switching device can reduce, and can select withstand voltage low device like this, and performance is better, and cost is lower.
Description of drawings
Fig. 1 is the electrical block diagram of the embodiment of the invention 1;
Fig. 2 is the electrical block diagram of the embodiment of the invention 2;
Fig. 3 is the electrical block diagram of the embodiment of the invention 3;
Fig. 4 is the electrical block diagram of the embodiment of the invention 4;
Fig. 5 is the electrical block diagram of the embodiment of the invention 5;
Fig. 6 is the electrical block diagram of the embodiment of the invention 6;
Embodiment
Also in conjunction with the accompanying drawings the present invention is described in further details below by concrete execution mode.
As shown in Figure 1, a kind of uninterrupted power supply comprises subelement, and described subelement comprises the handover module that is used to switch civil power or battery input.Described subelement also comprises the first gate-controlled switch Q1, the second gate-controlled switch Q2, the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4, the 5th gate-controlled switch Q5, the 6th gate-controlled switch Q6, first inductance L 1, bus capacitor DC1 and second inductance L 2.
As shown in Figure 1, the first gate-controlled switch Q1, the second gate-controlled switch Q2 link to each other and form first brachium pontis, and the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4 link to each other and form second brachium pontis, and second brachium pontis carries out low frequency according to the frequency of output and switches.The 5th gate-controlled switch Q5, the 6th gate-controlled switch Q6 link to each other and form the 3rd brachium pontis.Described first brachium pontis, second brachium pontis and the 3rd brachium pontis are connected across the two ends of described bus capacitor DC1 respectively.The mid point coupling of output coupling, second end and first brachium pontis of described first inductance L, 1 first end and handover module, the mid point of described second brachium pontis is coupled to center line N, and the mid point coupling of described second inductance L, 2 first ends and the 3rd brachium pontis, second end are the output of subelement.In the present embodiment, the output of subelement is the output of uninterrupted power supply.
As shown in Figure 1, described handover module comprises first switch S 1 and second switch S2, first end coupling of described first switch S, 1 first end and civil power input coupling, second end and first inductance L 1, described second switch S2 first end and battery input coupling, second end and the coupling of first inductance L, 1 first end.When first switch S, 1 closure, when second switch S2 disconnects, uninterrupted power supply is operated in the civil power input pattern; When 1 disconnection of first switch S, when second switch S2 is closed, uninterrupted power supply is operated in the battery input pattern.
As shown in Figure 1, described subelement also comprises second capacitor C 2, and described second capacitor C, 2 first ends and the coupling of described second inductance L, 2 second ends, second end are coupled to center line N.
As shown in Figure 1, the described first gate-controlled switch Q1, the second gate-controlled switch Q2, the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4, the 5th gate-controlled switch Q5 and the 6th gate-controlled switch Q6 are respectively metal oxide semiconductor field effect tube (metal-oxide-semiconductor).
As shown in Figure 1, in the present embodiment, described first switch S 1 is a relay, and second switch S2 can be controllable silicon.
As shown in Figure 1, described uninterrupted power supply also can comprise battery BATTERY, and second end of first end of described battery BATTERY and the coupling of second switch S2 first end, described battery BATTERY is coupled to center line N.First end links to each other battery BATTERY positive pole, battery BATTERY negative pole links to each other with center line N with second switch S2 (controllable silicon anode) in the present embodiment, first end of second switch S2 (controllable silicon negative electrode) second termination first inductance L 1.
Perhaps, described uninterrupted power supply does not comprise battery, and externally hanging battery gets final product during use.And the connection of battery BATTERY also can change, and promptly first end links to each other battery BATTERY negative pole, first end of second switch S2 (controlled anode) second termination first inductance L 1 with second switch S2 (controllable silicon negative electrode).At this moment, UPS still can operate as normal.
The principle Analysis of present embodiment is as follows:
The operation principle of positive half cycle is as follows: when civil power is input as positive half cycle, suppose that output also is positive half cycle, because second brachium pontis is controlled by the 3rd brachium pontis, the 4th gate-controlled switch Q4 of such second brachium pontis is just closed always in half cycle.Input current is through the second gate-controlled switch Q2, the 4th gate-controlled switch Q4 of first switch S 1, first inductance L 1, closure, center line N forms electric current, first inductance L, 1 electric current rises, 1 energy storage of first inductance L, after electric current rises to controlling value, the second gate-controlled switch Q2 disconnects, electric current is given bus capacitor DC1 discharge through the body diode of the first gate-controlled switch Q1 (metal-oxide-semiconductor) earlier, after the first gate-controlled switch Q1 closure, the first gate-controlled switch Q1 takes over the electric current of the body diode of flowing through, and gives bus capacitor DC1 discharge, again through the 4th gate-controlled switch Q4, center line N turns back to power supply.
When being input as negative half period, suppose that output this moment is also for negative, then the 3rd gate-controlled switch Q3 will be closed always at negative half period, electric current is through center line N, the 3rd closed gate-controlled switch Q3, the first gate-controlled switch Q1, first inductance L 1, first switch S 1 is returned mains supply and is carried out energy storage, after negative current rises to controlling value, the first gate-controlled switch Q1 disconnects, electric current is through the 3rd gate-controlled switch Q3, bus capacitor DC1, the body diode of the second gate-controlled switch Q2 (metal-oxide-semiconductor) is given bus capacitor DC1 discharge, after the second gate-controlled switch Q2 closure, the second gate-controlled switch Q2 takes over the electric current of the body diode of flowing through, give bus capacitor DC1 discharge, through first inductance L 1, first switch S 1 turns back to power supply.
From the whole cycle, can see it all being conductings that the metal-oxide-semiconductor conducting has replaced diode, reduce on-state loss, and had only a bus (Bus) voltage, to compare existingly, the stress of switch has only monolateral Bus voltage, and inductance is all worked in positive-negative half-cycle, and utilance is higher.
In like manner can see the control of inversion: during positive half cycle, the 4th gate-controlled switch Q4 is closed always in positive half cycle, when controlling the 5th gate-controlled switch Q5 closure, the energy of bus capacitor DC1 is through the 5th gate-controlled switch Q5, second inductance L 2, second capacitor C 2, center line N, the 4th gate-controlled switch Q4 forms the loop, electric current rises in second inductance L 2, when electric current rises to Control current, the 5th gate-controlled switch Q5 turn-offs, electric current is through the body diode of the 6th gate-controlled switch Q6 (metal-oxide-semiconductor) in second inductance L 2, second inductance L 2, second capacitor C 2, center line N, the 4th gate-controlled switch Q4 forms the loop, energy storage is discharged on second capacitor C 2 in second inductance L 2, by controlling the closed time that disconnects of the 5th gate-controlled switch Q5, just can control the output voltage on the C2.
During negative half period, the 3rd gate-controlled switch Q3 is closed always in negative half period, when controlling the 6th gate-controlled switch Q6 closure, the energy of bus capacitor DC1 is through the 3rd gate-controlled switch Q3, center line N, second capacitor C 2, second inductance L 2, the 6th gate-controlled switch Q6, form the loop, the negative sense inductive current rises in second inductance L 2, when electric current rises to Control current, the 6th gate-controlled switch Q6 turn-offs, electric current is through the body diode of the 5th gate-controlled switch Q5 (metal-oxide-semiconductor) in second inductance L 2, the 3rd gate-controlled switch Q3, center line N, second capacitor C 2, second inductance L 2, form the loop, energy storage is discharged on second capacitor C 2 in second inductance L 2, by controlling the closed time that disconnects of the 6th gate-controlled switch Q6, just can control the output negative voltage on second capacitor C 2.
When inductive current was flowed through body diode, the closed pair metal-oxide-semiconductor of answering simultaneously replaced the conducting of diode by the conducting of metal-oxide-semiconductor, and efficient is promoted, owing to have only a Bus voltage, voltage stress is little simultaneously.Under the situation of system's input and output homophase, the current in middle wire of this moment is that rectifier input current and inverter output current subtract each other, current in middle wire is less, loss is very little, may occur the second brachium pontis electric current on the particular point is zero situation, the on-state loss of metal-oxide-semiconductor is less in addition, so the efficient point far above previous circuit may occur.Realize the switching of battery, civil power input by first switch S 1, second switch S2.When the civil power power down, first switch S 1 disconnects, second switch S2 closure, and battery is realized boosting of battery by first inductance L, 1, the first brachium pontis (Q1, Q2) and second brachium pontis (Q3, Q4) acting in conjunction, and the voltage on the bus capacitor DC1 is stabilized in prescribed limit.
As shown in Figure 2, present embodiment is with the different of embodiment 1: described subelement also comprises first capacitor C 1, and described first capacitor C, 1 first end and the coupling of described first inductance L, 1 first end, second end are coupled to center line N.First capacitor C 1 and first inductance L 1 can be imported filtering, make UPS work more stable.
Embodiment 3
As shown in Figure 3, present embodiment is with the different of embodiment 2: described subelement also comprises the 3rd inductance L n, and the described second brachium pontis mid point is coupled to center line N by described the 3rd inductance L n.Present embodiment can reduce the coupling of the input and output of UPS.
Embodiment 4
As shown in Figure 4, present embodiment is with the different of embodiment 2: the described first gate-controlled switch Q1, the second gate-controlled switch Q2, the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4, the 5th gate-controlled switch Q5 and the 6th gate-controlled switch Q6 are respectively insulated gate bipolar transistor (IGBT).And also available two the controllable silicon reverse parallel connections of first switch S 1 in the present embodiment are realized.The UPS of present embodiment can realize very high-power.IGBT in the present embodiment is packaged with a diode.
Embodiment 5
As shown in Figure 5, the difference of present embodiment and embodiment 2 is: described subelement has three, first end of first switch S 1 of three subelements and the three-phase of civil power input coupling respectively, first end interconnection of the second switch S2 of three subelements, the center line N interconnection of three subelements, three subelements are output as the three-phase output of uninterrupted power supply.In fact, present embodiment is that the circuit among 3 embodiment 2 is made up, to obtain the three-phase ups system.The UPS of present embodiment also can share same Battery pack, reduces cost.Present embodiment can make things convenient for the user to carry out the change of three-phase and single phase system as required between input and output, reduces the kind of stock in the production and selling.
In like manner, the circuit of 3 embodiment 1,3,4 is made up respectively, also can obtain three kinds of three-phase ups systems.Compound mode can be with reference to Fig. 5.
Embodiment 6
As shown in Figure 6, the difference of present embodiment and embodiment 2 is: described subelement has at least two, first end interconnection of first switch S 1 of each subelement, first end interconnection of the second switch S2 of each subelement, the center line N interconnection of each subelement, the output interconnection of each subelement.
In fact, present embodiment is that 3 circuit among the embodiment 2 carry out direct parallel connection, can obtain 3 times power output.Certainly need in the control circulation between the module between three is controlled.Present embodiment can make things convenient for the user to carry out the increase of power capacity as required between input and output, reduces the kind of stock in the production and selling.
In like manner, the circuit of 2 above embodiment 1,3,4 is carried out the parallel connection combination respectively, also can obtain the high power UPS system of other kinds.Compound mode can be with reference to Fig. 6.
UPS of the present invention has only single busbar connection (bus capacitor), and bus capacitor all can obtain replenishing of energy in the positive-negative half-cycle of input, and the capacity of bus capacitor can reduce, and cost can reduce.Owing to be single busbar connection, the voltage stress of gate-controlled switch has only single busbar connection, same output voltage, and the withstand voltage of switching device can reduce, and can select withstand voltage low device like this, and performance is better, and cost is lower.
UPS of the present invention utilizes the little characteristics of the on-state loss of metal-oxide-semiconductor, and the on state voltage of having eliminated diode falls, and has improved the efficient of conversion.Utilize the metal-oxide-semiconductor body diode to carry out the nature change of current earlier simultaneously, open corresponding M OS pipe then, realized that the no-voltage of metal-oxide-semiconductor is open-minded.UPS of the present invention reduces the on-state loss by the less on-state voltage drop of metal-oxide-semiconductor; It is better to choose characteristic by the voltage stress that reduces switching device, and switching speed is fast, the lower device of cost when on-state voltage drop is little.
UPS of the present invention uses single Battery pack just can produce the generating positive and negative voltage that output needs, and battery is reference point with the center line, when a plurality of same circuit modules carry out parallel connection, and can shared same battery pack.
UPS of the present invention can interconnect by a plurality of subelements, simultaneously can adopt three modules or three multiple module easily, carry out misphase control by parallel circuits, form three-phase system very easily, and this system can and carry out the change of three-phase and single phase system easily according to client's needs between input and output, do not increase cost, be convenient to reduce the kind of stock in the production and selling.
UPS of the present invention can carry out direct parallel connection by a plurality of subelements, obtains the UPS of big power output, does not increase cost, is convenient to reduce the kind of stock in the production and selling.
UPS of the present invention can improve the efficient of conversion, reduces the requirement to device, promotes frequency, reaches the lifting performance, reduces volume, the purpose that reduces cost.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace; for example the switching tube in the embodiment of the invention is changed into other full control device; for example: high power transistor (GTR) and turn-off thyristor (GTO), MOS control thyristor (MCT), static induction transistor (SIT), static induction thyristor (SITH), integrated gate commutated thyristor (IGCT) all should be considered as belonging to protection scope of the present invention.
Claims (11)
1. uninterrupted power supply, comprise subelement, described subelement comprises the handover module that is used to switch civil power or battery input, it is characterized in that: described subelement also comprises first brachium pontis that first gate-controlled switch (Q1), second gate-controlled switch (Q2) link to each other and form, second brachium pontis that the 3rd gate-controlled switch (Q3), the 4th gate-controlled switch (Q4) link to each other and form, the 3rd brachium pontis that the 5th gate-controlled switch (Q5), the 6th gate-controlled switch (Q6) link to each other and form, first inductance (L1), bus capacitor (DC1) and second inductance (L2); Described first brachium pontis, second brachium pontis and the 3rd brachium pontis are connected across the two ends of described bus capacitor (DC1) respectively, the mid point coupling of output coupling, second end and first brachium pontis of described first inductance (L1) first end and handover module, the mid point of described second brachium pontis is coupled to center line (N), and the mid point coupling of described second inductance (L2) first end and the 3rd brachium pontis, second end are the output of subelement.
2. uninterrupted power supply according to claim 1, it is characterized in that: described handover module comprises first switch (S1) and second switch (S2), first end coupling of described first switch (S1) first end and civil power input coupling, second end and first inductance (L1), described second switch (S2) first end and battery input coupling, second end and the coupling of first inductance (L1), first end.
3. uninterrupted power supply according to claim 2 is characterized in that: described uninterrupted power supply also comprises battery, and second end of first end of described battery and the coupling of second switch (S2) first end, described battery is coupled to center line (N).
4. uninterrupted power supply according to claim 2 is characterized in that: described subelement also comprises first electric capacity (C1), and described first electric capacity (C1) first end and the coupling of described first inductance (L1) first end, second end are coupled to center line (N).
5. uninterrupted power supply according to claim 2 is characterized in that: described subelement also comprises the 3rd inductance (Ln), and the described second brachium pontis mid point is coupled to center line (N) by described the 3rd inductance (Ln).
6. uninterrupted power supply according to claim 2 is characterized in that: described subelement also comprises second electric capacity (C2), and described second electric capacity (C2) first end and the coupling of described second inductance (L2) second end, second end are coupled to center line (N).
7. uninterrupted power supply according to claim 2 is characterized in that: described first gate-controlled switch (Q1), second gate-controlled switch (Q2), the 3rd gate-controlled switch (Q3), the 4th gate-controlled switch (Q4), the 5th gate-controlled switch (Q5) and the 6th gate-controlled switch (Q6) are respectively metal oxide semiconductor field effect tube.
8. uninterrupted power supply according to claim 2 is characterized in that: described first gate-controlled switch (Q1), second gate-controlled switch (Q2), the 3rd gate-controlled switch (Q3), the 4th gate-controlled switch (Q4), the 5th gate-controlled switch (Q5) and the 6th gate-controlled switch (Q6) are respectively insulated gate bipolar transistor.
9. uninterrupted power supply according to claim 2 is characterized in that: described first gate-controlled switch (Q1), second gate-controlled switch (Q2), the 3rd gate-controlled switch (Q3), the 4th gate-controlled switch (Q4), the 5th gate-controlled switch (Q5) and the 6th gate-controlled switch (Q6) are respectively power transistor or turn-off thyristor or MOS control thyristor or static induction transistor or static induction thyristor or integrated gate commutated thyristor.
10. according to the arbitrary described uninterrupted power supply of claim 2-8, it is characterized in that: described subelement has three, first end of first switch (S1) of three subelements and the three-phase of civil power input coupling respectively, first end interconnection of the second switch of three subelements (S2), the center line of three subelements (N) interconnection, three subelements are output as the three-phase output of uninterrupted power supply.
11. according to the arbitrary described uninterrupted power supply of claim 2-8, it is characterized in that: described subelement has at least two, first end interconnection of first switch (S1) of each subelement, first end interconnection of the second switch of each subelement (S2), the center line of each subelement (N) interconnection, the output interconnection of each subelement.
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| CN200910109261A CN101699699A (en) | 2009-07-30 | 2009-07-30 | Uninterruptible power supply |
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| CN200910109261A CN101699699A (en) | 2009-07-30 | 2009-07-30 | Uninterruptible power supply |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807804A (en) * | 2010-03-19 | 2010-08-18 | 艾默生网络能源有限公司 | Uninterrupted power supply system with shared battery |
| CN102832688A (en) * | 2011-06-17 | 2012-12-19 | 艾默生网络能源有限公司 | Uninterruptible power supply |
| CN103344870A (en) * | 2013-06-25 | 2013-10-09 | 华为技术有限公司 | Method and device for detecting short circuit of thyristor of uninterrupted power system |
| CN106972602A (en) * | 2017-05-05 | 2017-07-21 | 江苏金帆电源科技有限公司 | Charging and discharging circuit and method based on half-bridge structure |
| CN109962474A (en) * | 2017-12-25 | 2019-07-02 | 台达电子工业股份有限公司 | Non-interruption power supply device |
| CN112018867A (en) * | 2020-07-27 | 2020-12-01 | 科华恒盛股份有限公司 | Uninterrupted power supply capable of being configured with shared battery and uninterrupted power supply parallel operation system |
| CN112953239A (en) * | 2021-03-04 | 2021-06-11 | 广东电网有限责任公司 | Topological structure of DC-DC converter |
| WO2021232706A1 (en) * | 2020-05-22 | 2021-11-25 | 广州视源电子科技股份有限公司 | Three-bridge arm topology apparatus, control method, inverter system and uninterrupted power supply system |
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2009
- 2009-07-30 CN CN200910109261A patent/CN101699699A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807804A (en) * | 2010-03-19 | 2010-08-18 | 艾默生网络能源有限公司 | Uninterrupted power supply system with shared battery |
| CN102832688A (en) * | 2011-06-17 | 2012-12-19 | 艾默生网络能源有限公司 | Uninterruptible power supply |
| CN102832688B (en) * | 2011-06-17 | 2015-05-20 | 艾默生网络能源有限公司 | Uninterruptible power supply |
| CN103344870A (en) * | 2013-06-25 | 2013-10-09 | 华为技术有限公司 | Method and device for detecting short circuit of thyristor of uninterrupted power system |
| CN103344870B (en) * | 2013-06-25 | 2016-01-27 | 华为技术有限公司 | The thyristor method for detecting short circuit of uninterruptible power system and device |
| CN106972602A (en) * | 2017-05-05 | 2017-07-21 | 江苏金帆电源科技有限公司 | Charging and discharging circuit and method based on half-bridge structure |
| CN109962474A (en) * | 2017-12-25 | 2019-07-02 | 台达电子工业股份有限公司 | Non-interruption power supply device |
| CN109962474B (en) * | 2017-12-25 | 2024-01-23 | 台达电子工业股份有限公司 | Uninterruptible power supply device |
| WO2021232706A1 (en) * | 2020-05-22 | 2021-11-25 | 广州视源电子科技股份有限公司 | Three-bridge arm topology apparatus, control method, inverter system and uninterrupted power supply system |
| CN112018867A (en) * | 2020-07-27 | 2020-12-01 | 科华恒盛股份有限公司 | Uninterrupted power supply capable of being configured with shared battery and uninterrupted power supply parallel operation system |
| CN112018867B (en) * | 2020-07-27 | 2022-05-10 | 科华恒盛股份有限公司 | Uninterrupted power supply capable of being configured with shared battery and uninterrupted power supply parallel operation system |
| CN112953239A (en) * | 2021-03-04 | 2021-06-11 | 广东电网有限责任公司 | Topological structure of DC-DC converter |
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Application publication date: 20100428 |