CN101521394A - Online uninterrupted power supply - Google Patents
Online uninterrupted power supply Download PDFInfo
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- CN101521394A CN101521394A CN200810034046A CN200810034046A CN101521394A CN 101521394 A CN101521394 A CN 101521394A CN 200810034046 A CN200810034046 A CN 200810034046A CN 200810034046 A CN200810034046 A CN 200810034046A CN 101521394 A CN101521394 A CN 101521394A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- 238000004804 winding Methods 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 14
- 238000007600 charging Methods 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention relates to an online uninterrupted power supply comprising an alternating current input coupled with a mains input end, an alternating current output coupled with a load end, a rectifier device used for the rectified output of the inputted alternating voltage, a direct current/direct current conversion device, a direct current device used for providing direct current voltage when mains power is off and a first switch device which is powered by a direct current power supply when being conducted, a direct current/alternating current conversion device and a second switch device used for switching the power supply between the mains power and the uninterrupted power supply; wherein the direct current/direct current conversion device is used for converting input direct current voltage into sine-wave pulse width direct current voltage which is processed into sine-wave pulse width alternating current voltage by the direct current/alternating current conversion device and then output after being filtered, thus reducing the power conversion loss; and the direct current/direct current conversion device also can be used for conveying excess energy generated by a load side or the direct current/alternating current conversion device back to the direct current power supply for storing energy, thus realizing power-saving effect.
Description
Technical field
The present invention relates to a kind of uninterrupted power supply(ups), refer to a kind of improved online uninterrupted power supply(ups) especially.
Background technology
Uninterrupted power supply (ups) Unity is a kind of AC power supply, its can be when civil power be undesired moment alternating current is provided.At present, known online uninterrupted power supply(ups), two conversion equipments of employing AC-DC, DC-AC, as shown in Figure 4.The civil power input is carried out filtering by filter 111 earlier; pass through fuse 112 overload protections again; again by 113 rectifications of three phase full bridge rectifying device; filter into direct voltage through capacitor filtering device 115; cell apparatus 114 also provides direct voltage through three phase full bridge rectifying device 113; deliver to inverter 117 through fuse 116; direct voltage is produced sine voltage with SPWM (SINEWAVEPULSE WIDTH MODULATION) control technology through the Industrial Frequency Transformer isolation boosting, and the AC power that 118 outputs purify through relay system outputs to the client power supply after wave apparatus 119 filtering more after filtration.Known but (shown in Figure 4) uninterrupted power supply (ups) Unity complete machine oepration at full load efficient is about 80%～85%, and efficient is lower during underloading, and the too many power of transition loss.
Summary of the invention
One object of the present invention is to provide a kind of improved online uninterrupted power supply(ups), pass through DC/DC conversion device, to be converted to the sinusoidal wave pulse width direct voltage through the direct voltage of rectification, only in DC/DC conversion device, utilized a power conversions to realize input voltage is converted to the sinusoidal wave pulse width direct voltage, through DC/AC switching device sine wave output pulsewidth alternating voltage.
For realizing above-mentioned purpose of the present invention, online uninterrupted power supply of the present invention comprises:
One exchanges input, is coupled in the mains electricity input end;
One exchanges output, is coupled in load end;
One rectifying device, its input are coupled in and exchange input, are used for the ac voltage rectifier of input is exported;
One direct current power supply, parallel coupled are used for providing direct voltage in the output of described rectifying device when mains failure;
One silicon controlled switch is electrically connected on the output of described DC power supply, described DC power supply during this switching device conducting;
One DC/DC conversion device, its input is coupled in the output of rectifying device, be used for the direct voltage of input is converted to the output of sinusoidal wave pulse width direct voltage, this DC/DC conversion device comprises a step-up transformer, this step-up transformer comprises a primary side and a secondary end, this primary side comprises two windings, and first power switch and second power switch that are coupled in two windings of this primary side respectively, this secondary end comprises two windings, and the 3rd power switch and the 4th power switch that are coupled in two windings of this secondary end respectively;
One DC/AC switching device, its input is coupled in the output of described DC/DC conversion device, output is coupled in described interchange output, and this DC/AC switching device comprises four power switch (61,62,63,64) and low pass filters by processor control;
One relay is coupled in ac output end, is used for switching the power supply of mains-supplied and this uninterrupted power supply(ups); And
One processor is used for controlling the described first and the 3rd power switch alternate conduction and shutoff, the second and the 4th power switch alternate conduction and shutoff;
Described DC/DC conversion device is controlled by described processor, and the direct voltage of importing is converted to the sinusoidal wave pulse width direct voltage, through described DC/AC switching device sine wave output pulsewidth alternating voltage, carries out exporting after the filtering again.
Owing to adopted above-mentioned technical scheme, online uninterrupted power supply(ups) of the present invention utilizes DC/DC conversion device will be converted to the sinusoidal wave pulse width direct voltage through the direct voltage of rectification, through DC/AC switching device sine wave output pulsewidth alternating voltage, only in DC/DC conversion device, utilize power conversions, reduced the transfer power loss.
Another object of the present invention is to provide a kind of improved online uninterrupted power supply, and it utilizes DC/DC conversion device to send the excess energy of load-side or DC/AC switching device generation back to the DC power supply energy storage.
For realizing above-mentioned purpose of the present invention, described DC/DC conversion device also comprises a charging circuit, this charging circuit comprises a step-down transformer, an electric capacity and a diode, this step-down transformer comprises a primary side and a secondary end, wherein this step-down transformer primary side is described step-up transformer secondary end, this step-down transformer secondary end comprises a winding, and this DC/DC conversion device is sent the excess energy of load-side or DC/AC switching device generation back to the DC power supply energy storage by described charging circuit.
Owing to adopted this technical scheme, this online uninterrupted power supply(ups) reaches purpose of energy saving thereby excess energy can be sent back to the DC power supply energy storage when the excess energy of load-side or DC/AC switching device generation.
Description of drawings
Fig. 1 is the structure block schematic diagram of the online uninterrupted power supply(ups) of one preferred embodiment according to the present invention;
Fig. 2 is the output waveform schematic diagram of online uninterrupted power supply(ups) each point when civil power is arranged of one preferred embodiment according to the present invention;
Fig. 3 is the output waveform schematic diagram of online uninterrupted power supply(ups) each point when cell apparatus is powered of one preferred embodiment according to the present invention; And
Fig. 4 is the structure block diagram of known online uninterrupted power supply(ups).
Embodiment
Fig. 1 is the structure block schematic diagram of the online uninterrupted power supply(ups) of one preferred embodiment according to the present invention.The online uninterrupted power supply(ups) of this preferred embodiment comprises:
One filter 1 is coupled in ac input end, is used for the civil power of input is carried out filtering;
One rectifying device 2, its input is coupled in the output of filter 1, is used for the commercial power rectification through filtering is exported;
One cell apparatus 3, parallel coupled are used for providing direct voltage in the output of described rectifying device 2 when mains failure;
One silicon controlled switch 4 is electrically connected on described cell apparatus 3, cell apparatus 3 power supplies during these silicon controlled switch 4 conductings;
One DC/DC conversion device 5, its input is coupled in the output of rectifying device 2;
One DC/AC switching device 6, its input is coupled in the output of DC/DC conversion device 5;
One relay 7 is coupled in ac output end, is used for switching the power supply of mains-supplied and this uninterrupted power supply(ups);
One filter 8 is coupled in the output of this online uninterrupted power supply(ups), be used for will output voltage through filtering, supply with client device; And
One processor is used for controlling the switching of DC/DC conversion device 5, DC/AC switching device 6 and relay 7.
More specifically, this DC/DC conversion device 5 comprises a step-up transformer, form the push-pull circuit primary side by winding 51,52 and first power switch 56, second power switch 57, its conducting duty ratio is less than 50%, and form secondary end output in parallel by winding 53,54 with the 3rd power switch 58, the 4th power switch 59, be used for will input direct voltage be converted to the output of sinusoidal wave pulse width direct voltage.When load-side or 6 work of ac/dc conversion equipment, producing excess energy, the 3rd power switch 58,59 conductings of the 4th power switch are sent energy back to step-down transformer secondary end winding 55 through diode 501, filter capacitor 502 arrives cell apparatus 3 with store energy.Because the SPWM signal conduction duty ratio that will produce is greater than 50%, so by first power switch 56,57 each conducting of second power switch half again through the synthetic SPWM signal of 53,54 winding additions output, when not considering conversion efficiency, also can replace the 3rd power switch 58, the 4th power switch 59 with diode for reducing cost.Can set first power switch 56 and the 58 synchronous conductings of the 3rd power switch, second power switch 57 and the 59 synchronous conductings of the 4th power switch, voltage drop when reducing the power switch conducting is raised the efficiency.
This DC/AC switching device 6 comprises four power switchs 61,62,63,64, and the low pass filter of being made up of an inductance 65 and an electric capacity 66 that is used for carrying out filtering.Utilize the conducting and the shutoff of processor power controlling switch 61,62,63,64, power switch 61,62 conductings produce the SPWM voltage waveform of positive half cycle, power switch 63,64 conductings produce the SPWM voltage waveform of negative half period, will be output as the sinusoidal wave pulse width alternating voltage through four power switchs 61,62,63,64 from the sinusoidal wave pulse width direct voltage of DC/DC conversion device 5 outputs.
Online uninterrupted power supply (ups) Unity of the present invention is not subjected to the influence of mains supply quality.When civil power just often, civil power directly outputs to client by filter 1 filtering through relay 7, filter 8; When overtension or cross when low, provide pure AC power by this online uninterrupted power supply(ups); Not having to change break period when mains failure provides energy to continue the AC power that provides pure by cell apparatus 3.
When civil power was too high or too low, silicon controlled switch 4 disconnected, and switched to this online uninterrupted power supply power supply by processor control relay 7.Civil power is imported from filter 1 through rectifying device 2, with AC rectification only become on the occasion of the sine wave (reference waveform 17 as shown in Figure 2) of mains frequency twice, offer the step-up transformer primary side winding 51 of DC to DC converter 5,52, control first power switch 56 by processor, second power switch, 57 alternate conduction produce high-frequency pulse wave electric voltage (reference waveform 12 as shown in Figure 2,13), transformer is full to be closed in order to avoid, restriction step-up transformer primary side winding 51,52 maximum duty cycle is not more than 50%, process step-up transformer isolation boosting is to secondary end winding 53,54, the synthetic real sinusoidal wave pulse width direct voltage (reference waveform 14 as shown in Figure 2) of waveform adder (is calculated the value of each sinusoidal wave pulse width divided by two by processor, as first power switch 56, the switch controlling signal of second power switch 57), again the sinusoidal wave pulse width high-frequency DC is pressed through DC/AC switching device 6 and produce low frequency (50Hz/60Hz) sinusoidal wave pulse width alternating voltage, processor power controlling switch 61, produce positive half cycle (reference waveform 6162 as shown in Figure 2) during 62 conductings, processor power controlling switch 63, produce negative half period (reference waveform 6364 as shown in Figure 2) during 64 conductings, DC/AC switching device 6 will be from the sinusoidal wave pulse width direct voltage of DC/DC conversion device 5 output through four power switchs 61,62,63,64 are output as sinusoidal wave pulse width alternating voltage (reference waveform 15 as shown in Figure 2), export pure low-frequency sinusoidal AC voltages (reference waveform 16 as shown in Figure 2) through inductor 65 and the low pass filter filters out high frequency composition that capacitor 66 is formed then, through relay 7 outputs, behind filter 8 filtering harmonic waves, offer subscriber equipment and continue power supply again.Wherein the conducting of the 3rd power switch 58 ON time and first power switch 56 is synchronous, the conducting of the 4th power switch 59 ON time and second power switch 57 is synchronous, cpable of lowering power switch energy loss, also can replace the 3rd power switch 58, the 4th power switch 59, reduce cost with diode.In order to send the excess energy of load-side or DC/AC switching device 6 generations back to the battery-end energy storage, the 3rd power switch 58 and 59 conductings of the 4th power switch, send energy back to step-down transformer secondary end winding 55 and send excess energy back to battery energy storage through diode 501 filter capacitors 502, and to cell apparatus 3 chargings.
During mains failure, power by the cell apparatus 3 that processor control relay 7 switches in this uninterrupted device.Silicon controlled switch 4 conductings, cell apparatus 3 output voltages (reference waveform 11 as shown in Figure 3), offer the step-up transformer primary side winding 51 of DC to DC converter 5,52, control first power switch 56 by processor, second power switch, 57 alternate conduction produce high frequency pulse wave electric voltage (reference waveform 12 as shown in Figure 3,13), transformer is full to be closed in order to avoid, restriction step-up transformer primary side winding 51,52 maximum duty cycle is not more than 50%, process step-up transformer isolation boosting is to secondary end winding 53,54, the sinusoidal wave pulse width high-frequency DC that waveform adder is synthetic real presses (reference waveform 14 as shown in Figure 3) (to calculate the value of each sinusoidal wave pulse width divided by two by the processor processing device, as first power switch 56, the switch controlling signal of second power switch 57), again the sinusoidal wave pulse width high-frequency DC is pressed through DC/AC switching device 6 and produce low frequency (50Hz/60Hz) sine wave AC voltage, processor power controlling switch 61, produce positive half cycle (reference waveform 6162 as shown in Figure 3) during 62 conductings, processor power controlling switch 63, produce negative half period (reference waveform 6364 as shown in Figure 3) during 64 conductings, DC/AC switching device 6 will be pressed through four power switchs 61 from the sinusoidal wave pulse width high-frequency DC of DC/DC conversion device 5 outputs, 62,63,64 are output as sinusoidal wave pulse width alternating voltage (reference waveform 15 as shown), export pure low-frequency sinusoidal AC voltages (reference waveform 16 as shown in Figure 3) through inductor 65 and the low pass filter filters out high frequency composition that capacitor 66 is formed then, through relay 7 outputs, behind filter 8 filtering harmonic waves, offer subscriber equipment and continue power supply again.
Be understandable that the detailed description of the foregoing description is in order to set forth and explain principle of the present invention rather than to the qualification of protection scope of the present invention.Under the prerequisite that does not break away from purport of the present invention, one of ordinary skill in the art can be made modification by the understanding to the principle of being instructed of technique scheme on these embodiment bases, changes and changes.Therefore protection scope of the present invention by appended claim with and be equal to and limit.
Claims (9)
1, a kind of online uninterrupted power supply comprises:
One exchanges input, is coupled in the mains electricity input end;
One exchanges output, is coupled in load end;
One rectifying device (2), its input are coupled in and exchange input, are used for the ac voltage rectifier of input is exported;
One direct current power supply (3), parallel coupled are used for providing direct voltage in the output of described rectifying device (2) when mains failure;
One first switching device (4) is coupled in the output of described DC power supply (3), described DC power supply (3) power supply during this switching device conducting;
One DC/DC conversion device (5), its input is coupled in the output of described rectifying device (2);
One DC/AC switching device (6), its input is coupled in the output of described DC/DC conversion device (5), and output is coupled in described interchange output;
One second switch device (7) is coupled in ac output end, is used for switching the power supply of mains-supplied and this uninterrupted power supply(ups); And
One processor;
It is characterized in that: described DC/DC conversion device (5) comprises a step-up transformer, this step-up transformer comprises a primary side and a secondary end, this primary side comprises two windings (51,52), and first and second power switchs (56,57) that are coupled in two windings (51,52) of this primary side respectively, this secondary end comprises two windings (53,54), and third and fourth power switch (58,59) that is coupled in two windings (53,54) of this secondary end respectively;
Described DC/DC conversion device (5) is controlled its first power switch (56) and the 3rd power switch (58) alternate conduction and shutoff, second power switch (57) and the 4th power switch (59) alternate conduction and shutoff by described processor, and the direct voltage of importing is converted to the sinusoidal wave pulse width direct voltage.
2, online uninterrupted power supply(ups) according to claim 1 is characterized in that: described DC/DC conversion device (5) also comprises a charging circuit, and this charging circuit comprises a step-down transformer, an electric capacity and a diode;
Described DC/DC conversion device (5) is sent the excess energy of load-side or DC/AC switching device (6) generation back to DC power supply (3) energy storage by described charging circuit.
3, online uninterrupted power supply(ups) according to claim 2, it is characterized in that: described step-down transformer comprises a primary side and a secondary end, wherein this step-down transformer primary side is described step-up transformer secondary end, and this step-down transformer secondary end comprises a winding (55).
4, according to each described online uninterrupted power supply(ups) of claim 1-3, it is characterized in that: described DC/AC switching device (6) comprises four power switch (61,62,63,64) and low pass filters by processor control,, carry out again exporting after the filtering through described DC/AC switching device (6) sine wave output pulsewidth alternating voltage by the sinusoidal wave pulse width direct voltage of DC/DC conversion device (5) conversion output.
5, online uninterrupted power supply(ups) according to claim 4 is characterized in that: described low pass filter comprises an inductance (65) and an electric capacity (66).
6, according to each described online uninterrupted power supply(ups) of claim 1-3, it is characterized in that: also comprise two filters (1,8), it is coupled in described ac input end and ac output end respectively, is used for this online uninterrupted power supply(ups) input is carried out filtering with the voltage of exporting.
7, according to each described online uninterrupted power supply(ups) of claim 1-3, it is characterized in that: first power switch (56) of described step-up transformer primary side and conducting synchronously of the 3rd power switch (58) of described step-up transformer secondary end or shutoff, second power switch (57) of described step-up transformer primary side and conducting synchronously of the 4th power switch (59) of described step-up transformer secondary end or shutoff.
8, online uninterrupted power supply(ups) according to claim 7 is characterized in that: the conducting duty ratio of first, second, third and fourth power switch of described step-up transformer primary side (56,57,58,59) is less than 50%.
9, according to each described online uninterrupted power supply(ups) of claim 1-3, it is characterized in that: the available diode of third and fourth power switch (58,59) that is coupled respectively with two windings (53,54) of described step-up transformer secondary end replaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810034046XA CN101521394B (en) | 2008-02-28 | 2008-02-28 | Online uninterrupted power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810034046XA CN101521394B (en) | 2008-02-28 | 2008-02-28 | Online uninterrupted power supply |
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| Publication Number | Publication Date |
|---|---|
| CN101521394A true CN101521394A (en) | 2009-09-02 |
| CN101521394B CN101521394B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810034046XA Expired - Fee Related CN101521394B (en) | 2008-02-28 | 2008-02-28 | Online uninterrupted power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185358A (en) * | 2011-05-24 | 2011-09-14 | 深圳茂硕电子科技有限公司 | Simple and practical movable uninterruptible power supply |
| CN102222965A (en) * | 2011-06-29 | 2011-10-19 | 黄俊嘉 | Hybrid UPS (uninterruptible power supply) |
| CN103683356A (en) * | 2012-09-20 | 2014-03-26 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Online uninterruptible power supply topology |
| CN108089687A (en) * | 2017-12-22 | 2018-05-29 | 厦门科华恒盛股份有限公司 | A kind of data center's high-efficiency type electric power system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI506928B (en) | 2013-05-08 | 2015-11-01 | Darfon Electronics Corp | Current source inverter and operation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101071C (en) * | 1998-11-12 | 2003-02-05 | 飞瑞股份有限公司 | ups |
| KR100439414B1 (en) * | 2002-06-28 | 2004-07-09 | 정환명 | DC/DC converter of Insulation type and Uninterruptible power supply used the same apparatus |
| CN101064438B (en) * | 2006-04-26 | 2010-12-01 | 台达电子工业股份有限公司 | Uninterruptible power supply capable of providing sine wave output alternating voltage |
-
2008
- 2008-02-28 CN CN200810034046XA patent/CN101521394B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185358A (en) * | 2011-05-24 | 2011-09-14 | 深圳茂硕电子科技有限公司 | Simple and practical movable uninterruptible power supply |
| CN102222965A (en) * | 2011-06-29 | 2011-10-19 | 黄俊嘉 | Hybrid UPS (uninterruptible power supply) |
| CN103683356A (en) * | 2012-09-20 | 2014-03-26 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Online uninterruptible power supply topology |
| WO2014044089A1 (en) * | 2012-09-20 | 2014-03-27 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | On-line uninterrupted power supply topology |
| CN103683356B (en) * | 2012-09-20 | 2015-10-21 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | On-Line UPS topology |
| US9819221B2 (en) | 2012-09-20 | 2017-11-14 | Eaton Corporation | Online uninterruptible power supply topology |
| CN108089687A (en) * | 2017-12-22 | 2018-05-29 | 厦门科华恒盛股份有限公司 | A kind of data center's high-efficiency type electric power system |
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| CN101521394B (en) | 2012-11-14 |
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