CN1333506C - Non interrupted power supply system having bus uniform voltage function - Google Patents
Non interrupted power supply system having bus uniform voltage function Download PDFInfo
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- CN1333506C CN1333506C CNB021345678A CN02134567A CN1333506C CN 1333506 C CN1333506 C CN 1333506C CN B021345678 A CNB021345678 A CN B021345678A CN 02134567 A CN02134567 A CN 02134567A CN 1333506 C CN1333506 C CN 1333506C
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Abstract
The present invention relates to a non interrupted power supply system having a bus voltage equalizing function, comprises a bridge type rectifying device which is composed of switching devices, a DC/DC converting device, a battery device and a control device which is used for controlling the switching devices of the bridge type rectifying device, wherein the bridge type rectifying device can accomplish a rectifying function under a mains mode, the DC/DC converting device is connected with a dc bus and is used for accomplishing a voltage dropping function or a voltage boosting function and the battery device is connected with the DC/DC converting device and is used for storing energy. The present invention is characterized in that under a battery mode, at least one phase input end of the bridge type rectifying device is switched on with a zero line, and a voltage equalizing function is accomplished by the switching devices under the control of the control device. The present invention combines a voltage equalizing circuit and an input PFC circuit, which enables large amounts of components to be multiplexed. Under the precondition of increasing less cost, a bus voltage equalizing function is realized, and the present invention can be applied to circuits of a two-phase UPS system or a three-phase UPS system.
Description
Technical field
The present invention relates to power technology, be specifically related to a kind of uninterruptible power system with bus uniform voltage function.
Background technology
Existing uninterruptible power system (UPS), the dc bus of main circuit adopts double-bus structure mostly, as shown in Figure 1, this typical single-phase pair of conversion on line type UPS main circuit topological structure, its operation principle is as follows: at civil power just often, work in " civil power " pattern, civil power is delivered to by L1 through input switch S1, Q1, D1, the input stage that Q2 and D2 constitute, this circuit of power factor correction (be called for short PFC) is just, negative busbar capacitor C p, Cn is last just to form stable direct current, negative busbar voltage, and by Q3, Q4, D3, D4, the inverter circuit of the output stage that L2 and Co constitute, thereby pure sinusoidal voltage is delivered to load through output switch S 2, and civil power charges through charger (not shown in figure 1) accumulators BAT simultaneously; When civil power was undesired, for example, voltage was higher, on the low side or when having a power failure, this UPS then works in " battery " pattern, and the battery that has charged boosts through DC/DC, and stable positive and negative busbar voltage is provided, and exports pure sinusoidal voltage to load by inverter circuit again.When PFC or inverter circuit were undesired, the UPS circuit working was in " bypass " pattern, and civil power is directly delivered to load by by-pass switch S2.
Generally speaking, the mean value of positive and negative busbar voltage can be former thereby unequal because of some, if difference is excessive, do not suppress, can make the positive and negative half cycle of output voltage obviously asymmetric, and the input voltage range of entire circuit is narrowed down, even make the circuit cisco unity malfunction, therefore be necessary to take positive and negative bus uniform voltage measure, make two average voltages on the electric capacity equal as far as possible.Existing all pressures mode is seen Fig. 2, on Fig. 1 basis, has increased " equalizer circuit " that be made of G5, G6, D5, D6 and L3, it all presses principle is such: during the Q5 conducting, and positive bus-bar capacitor C p discharge, L3 excitation, when Q5 disconnects, the L3 electric current can not suddenly change, through the D6 afterflow, so the L3 energy stored is transferred to Cn, in like manner, Q6 one logical one breaks and can transfer to Cp to the energy of Cn, and the ON time of control Q5, Q6 shifts with regard to the energy between may command Cp and the Cn, thus the voltage difference of control Cp and Cn.Yet this method will increase switching device and inductance L 3 such as Q5, Q6, D5 and D6, and device cost increases many.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of uninterruptible power system with bus uniform voltage function, and part is few and cost is low.
The above-mentioned technical problem of the present invention solves like this, constructs a kind of uninterruptible power system with bus uniform voltage function, comprising: the bridge-type rectifier of being formed, finished rectification and uniform voltage function by switching device under city's power mode; The DC/DC conversion equipment that links to each other and finish the buck or boost function with dc bus; Linking to each other with described DC/DC conversion equipment provides the cell apparatus of DC power supply; Control the control device and the inversion output stage unit of switching device in the described bridge-type rectifier, it is characterized in that: also comprise switching device shifter, be used for making described bridge-type rectifier have the input and the zero line conducting of a phase at least by switching under battery mode, the described switching device in institute's book bridge-type rectifier is finished uniform voltage function under the control of described control device.
In the uninterruptible power system of above-mentioned band bus uniform voltage function, to single-phase uninterruptible power system, described bridge-type rectifier is the single-phase bridge rectification device, described switching device shifter is the single-pole double throw selector switch, and the input of above-mentioned single-phase bridge rectification device controls described input by described single-pole double throw selector switch and the zero line conducting still conducts with the city.
In the uninterruptible power system of above-mentioned band bus uniform voltage function, described single-phase bridge rectification device is made up of input inductance (L1), first metal-oxide-semiconductor (Q1), second metal-oxide-semiconductor (Q2), one end of input inductance (L1) links to each other with described switching device shifter, the other end links to each other with the source electrode of first metal-oxide-semiconductor, the drain electrode of second metal-oxide-semiconductor (Q2), the drain electrode of above-mentioned first metal-oxide-semiconductor (Q1) links to each other with direct current positive bus, and the source electrode of second metal-oxide-semiconductor (Q2) links to each other with dc bus.
In the uninterruptible power system of above-mentioned band bus uniform voltage function, to three-phase uninterrupted power-supply system, described rectifying device is a three-phase bridge-type rectifier, described switching device shifter is that three cuttves two are thrown selector switch, under battery mode, the input of a phase is thrown selector switch and zero line conducting by above-mentioned three cuttves two in the described three-phase bridge-type rectifier, and finishes one of switching and realize uniform voltage function mutually above-mentioned.
In the uninterruptible power system of above-mentioned band bus uniform voltage function, under battery mode, have the input of two-phase to throw selector switch and zero line conducting in the described three-phase bridge-type rectifier by above-mentioned three cuttves two, and have in the above-mentioned two-phase of finishing switching one mutually or two-phase finish uniform voltage function.
In the uninterruptible power system of above-mentioned band bus uniform voltage function, described three-phase bridge-type rectifier is made up of (Q5, Q6) pipe (Q3, Q4) and the 3rd metal-oxide-semiconductor (Q1, Q2), the 2nd MOS three inductance (La, Lb, Lc) and first metal-oxide-semiconductor.
Implement the uninterruptible power system of band bus uniform voltage function provided by the invention, equalizer circuit and input pfc circuit are combined, can a large amount of multiplexing components and parts, increasing seldom under the part and cost prerequisite, realize bus uniform voltage function, and can be applicable in the circuit of two-phase or three-phase ups system.
Description of drawings
Fig. 1 is the main circuit schematic diagram of typical two conversion on line type UPSs in the prior art;
Fig. 2 contains the main circuit schematic diagram of all pressing equal circuit in the existing ups system;
Fig. 3 is the principle schematic with UPS of bus uniform voltage function of the present invention;
Fig. 4 is the circuit theory diagrams of the embodiment of the UPS with bus uniform voltage function of the present invention;
Fig. 5 is the circuit theory diagrams of the UPS main circuit prime of three-phase input.
Embodiment
As shown in Figure 3, for realizing the multiplexing of components and parts, improve the devices use rate, basic ideas of the present invention are exactly that equalizer circuit and input pfc circuit are combined, and specifically are exactly, at city's power mode, S1 places a set, and the input stage that Q1, Q2 and L1 etc. constitute increases the Pressure and Control loop as PFC in its control, then PFC can finish uniform voltage function when realizing rectification.At battery mode, if Cp, Cn average voltage are unequal, then S1 places " 2 ", and input stage becomes equalizer circuit, can make Cp, Cn average voltage almost equal.Some the time, pattern that system might " unite power supply " promptly is in city's power mode and battery mode simultaneously, then finishes uniform voltage function by PFC.In a word, except the bypass mode that does not need all to press, Fig. 3 circuit can be finished all in various patterns and press.Can find out that Fig. 3 circuit can be realized the uniform voltage function of Fig. 2 circuit, compare with Fig. 1 circuit that S1 has become " single-pole double throw " from " single-pole single-throw(SPST ", only increase a contact, the cost increase seldom.This multiplexing effectively same in two-phase or three-phase UPS.
An alternative embodiment of the invention as shown in Figure 4, all controls are finished by dsp board.At city's power mode, S1 places " 1 ", the input stage that devices such as L1, Q1 and Q2 constitute is as the half-bridge boost PFC, its basic controlling adopts dicyclo control, outer shroud is a Voltage loop, positive and negative total busbar voltage Vbus (Cp and Cn go up voltage sum) of feedback and output voltage instruction relatively, its error behind ratio-integration (PI) adjuster output variable as the command value i of input inductance current amplitude
L1_ref, realize input current tracking input mains waveform by interior ring, thereby finish power factor emendation function.In order to realize that positive and negative busbar all presses, increased the 3rd control ring----grading ring, the difference Vd of busbar voltage is delivered to correction link G, its output is superimposed on the current-order, thereby realizes that auto bus all presses.Output stage is the half-bridge inversion circuit of standard, also adopts dicyclo control in the control, exports more satisfactory sinusoidal voltage.At battery mode, S1 places " 2 ", battery provides stable positive and negative busbar voltage through DC/DC, export pure sine by the output inverter circuit and give load, at this moment, in case find that positive and negative busbar voltage difference is excessive, send control impuls then for control end G1 and the G2 of Q1 and Q2, regulate the busbar voltage difference, be feedback quantity i with city's power mode difference
L1With electric current loop output controlled quentity controlled variable i
L1_refAll be configured to zero.At the associating powering mode, S1 places " 1 ", and the work of input stage is the same with city's power mode, not only finishes the PFC function, and finishes bus uniform voltage function.
Q1 ~ Q4 of Fig. 4 is MOSFET, also can be the device for power switching of other types.For the UPS of two-phase or three-phase input, the also multiplex technique that can utilize the present invention to propose for example in second embodiment shown in Figure 5, has been realized UPS front stage circuits multiplexing of three-phase input by switch S 1, S2 and S3.
Claims (6)
1, a kind of uninterruptible power system with bus uniform voltage function comprises: the bridge-type rectifier of being formed, finished rectification and uniform voltage function by switching device under city's power mode; The DC/DC conversion equipment that links to each other and finish the buck or boost function with dc bus; Linking to each other with described DC/DC conversion equipment provides the cell apparatus of DC power supply; Control the control device and the inversion output stage unit of switching device in the described bridge-type rectifier, it is characterized in that: also comprise switching device shifter, be used under battery mode making the input and the zero line conducting of at least one phase of described bridge-type rectifier by switching, the described switching device in the described bridge-type rectifier is finished uniform voltage function under the control of described control device.
2, according to the described uninterruptible power system of claim 1, it is characterized in that, to single-phase uninterruptible power system, described bridge-type rectifier is the single-phase bridge rectification device, described switching device shifter is the single-pole double throw selector switch, and the input of above-mentioned single-phase bridge rectification device controls described input by described single-pole double throw selector switch and the zero line conducting still conducts with the city.
3, according to the described uninterruptible power system of claim 2, it is characterized in that, described single-phase bridge rectification device is made up of input inductance (L1), first metal-oxide-semiconductor (Q1), second metal-oxide-semiconductor (Q2), one end of input inductance (L1) links to each other with described switching device shifter, the other end links to each other with the source electrode of first metal-oxide-semiconductor, the drain electrode of second metal-oxide-semiconductor (Q2), the drain electrode of above-mentioned first metal-oxide-semiconductor (Q1) links to each other with direct current positive bus, and the source electrode of second metal-oxide-semiconductor (Q2) links to each other with dc bus.
4, according to the described uninterruptible power system of claim 1, it is characterized in that, to three-phase uninterrupted power-supply system, described rectifying device is a three-phase bridge-type rectifier, described switching device shifter is that three cuttves two are thrown selector switch, under battery mode, the input of a phase is thrown selector switch and zero line conducting by above-mentioned three cuttves two in the described three-phase bridge-type rectifier, and finishes one of switching and realize uniform voltage function mutually above-mentioned.
5, according to the described uninterruptible power system of claim 1, it is characterized in that, to three-phase uninterrupted power-supply system, described rectifying device is a three-phase bridge-type rectifier, described switching device shifter is that three cuttves two are thrown selector switch, under battery mode, have the input of two-phase to throw selector switch and zero line conducting in the described three-phase bridge-type rectifier by above-mentioned three cuttves two, and have in the above-mentioned two-phase of finishing switching one mutually or two-phase finish uniform voltage function.
6, according to the described uninterruptible power system of claim 4, it is characterized in that described three-phase bridge-type rectifier is made up of (Q5, Q6) pipe (Q3, Q4) and the 3rd metal-oxide-semiconductor (Q1, Q2), the 2nd MOS three inductance (La, Lb, Lc) and first metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021345678A CN1333506C (en) | 2002-08-14 | 2002-08-14 | Non interrupted power supply system having bus uniform voltage function |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021345678A CN1333506C (en) | 2002-08-14 | 2002-08-14 | Non interrupted power supply system having bus uniform voltage function |
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| CN1476139A CN1476139A (en) | 2004-02-18 |
| CN1333506C true CN1333506C (en) | 2007-08-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409453B (en) * | 2007-10-12 | 2011-02-09 | 深圳科士达科技股份有限公司 | Uninterruption power supply |
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| US7688048B2 (en) | 2007-02-21 | 2010-03-30 | American Power Conversion Corporation | 3-phase high power UPS |
| US8125182B2 (en) * | 2009-03-16 | 2012-02-28 | Ford Global Technologies, Llc | Automotive vehicle and method for charging/discharging a power storage unit therein |
| US8385091B2 (en) | 2009-08-20 | 2013-02-26 | Electric IT Corporation | 3-phase high-power UPS |
| US10038384B2 (en) | 2012-04-20 | 2018-07-31 | Semiconductor Components Industries, Llc | Control circuit for an inverter with small input capacitor |
| CN104065276B (en) * | 2014-06-27 | 2017-01-25 | 华为技术有限公司 | Method and apparatus for controlling three-phase uninterrupted power supply and three-phase uninterrupted power supply |
| CN105141153B (en) * | 2015-08-13 | 2018-07-24 | 厦门科华恒盛股份有限公司 | A kind of three phase rectifier booster circuit and its control method and uninterruptible power supply |
| CN106602853A (en) * | 2015-10-15 | 2017-04-26 | 伊顿公司 | Discharge device and discharge method for DC buses of uninterruptible power supply |
| CN107248814B (en) * | 2016-03-29 | 2019-09-13 | 比亚迪股份有限公司 | Single-phase alternating expression pfc circuit and onboard charger and electric car with it |
| CN105743335B (en) * | 2016-04-25 | 2018-10-23 | 佛山市新光宏锐电源设备有限公司 | A kind of DC Bus voltage compensatory circuit of uninterruptible power supply |
| CN106100087B (en) * | 2016-08-17 | 2018-10-19 | 漳州科华技术有限责任公司 | A kind of charging circuit and its control method |
| CN107785987B (en) * | 2016-08-25 | 2023-06-09 | 伊顿制造（格拉斯哥）有限合伙莫尔日分支机构 | Online uninterrupted power supply |
| CN110198116A (en) * | 2018-02-26 | 2019-09-03 | 维谛技术有限公司 | Battery translation circuit, uninterruptible power supply and battery transform method |
| CN109889077B (en) | 2019-04-08 | 2021-01-26 | 台达电子企业管理（上海）有限公司 | Single-phase and three-phase compatible AC/DC circuit and charging and discharging device |
| CN114285138B (en) * | 2021-12-31 | 2022-11-18 | 深圳市英威腾电源有限公司 | Bus voltage-sharing balance control device and three-phase high-frequency UPS |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126585A (en) * | 1990-06-19 | 1992-06-30 | Auckland Uniservices Limited | Uninterruptible power supplies |
| US6314007B2 (en) * | 1999-08-13 | 2001-11-06 | Powerware Corporation | Multi-mode power converters incorporating balancer circuits and methods of operation thereof |
-
2002
- 2002-08-14 CN CNB021345678A patent/CN1333506C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126585A (en) * | 1990-06-19 | 1992-06-30 | Auckland Uniservices Limited | Uninterruptible power supplies |
| US6314007B2 (en) * | 1999-08-13 | 2001-11-06 | Powerware Corporation | Multi-mode power converters incorporating balancer circuits and methods of operation thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409453B (en) * | 2007-10-12 | 2011-02-09 | 深圳科士达科技股份有限公司 | Uninterruption power supply |
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| CN1476139A (en) | 2004-02-18 |
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Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park B2 building 1-4 floor, building 6-10 Patentee after: VERTIV TECH Co.,Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: EMERSON NETWORK POWER Co.,Ltd. |
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