CN101685973B - Uninterrupted power supply - Google Patents
Uninterrupted power supply Download PDFInfo
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- CN101685973B CN101685973B CN2008101685636A CN200810168563A CN101685973B CN 101685973 B CN101685973 B CN 101685973B CN 2008101685636 A CN2008101685636 A CN 2008101685636A CN 200810168563 A CN200810168563 A CN 200810168563A CN 101685973 B CN101685973 B CN 101685973B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention discloses a uninterrupted power supply and the power supply comprises a power factor corrector, a charger, a secondary battery and a inverter, wherein the charger is used to charge the secondary battery; the inverter has a tri-level structure and is used to invert DC bus voltage to AC voltage; the power factor corrector rectifies commercial electricity to DC voltage to load on DC bus and charges the charger when commercial electricity is in normal state and when commercial electricity is abnormal, the power factor corrector boosts the voltage of the battery to DC bus. The charger of UPS of the invention is not isolated, the control is easy, and larger power can be easily realized. The uninterrupted power supply of the invention cancels the isolating transformer used in the prior art so as to reduce the cost of UPS, particularly the cost of high-power UPS.
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 single-phase UPS of existing middle low power section, absolutely large how many topological single-phase Vienna rectifiers add the inverter structure of two level, and charger uses isolated converter.In this structure, Converting Unit is owing to be two level, and have obvious shortcoming: the voltage stress of switching tube is larger, must select high withstand voltage pipe; The inversion inductor sensibility reciprocal is larger, and inversion efficiency is difficult to do height.Add the factors such as radiator, integrated cost is higher.And charger is owing to use isolated converter, and power is difficult to do greatly, such as the needs high-power charger, then will a plurality of parallel connections, and cost sharply rises.
Summary of the invention
Technical problem to be solved by this invention is exactly in order to overcome above deficiency, to have proposed a kind of cheaply uninterrupted power supply.
Technical problem of the present invention is solved by following technical scheme:
A kind of uninterrupted power supply comprises power factor corrector, charger, secondary cell, inverter; Described charger charges to secondary cell, described inverter is three level structures, be used for DC bus-bar voltage is reverse into alternating voltage, described power factor corrector becomes direct voltage to be added on the dc bus and to charger the commercial power rectification when civil power is normal to charge, when city's electrical anomaly with the boost in voltage on the battery to dc bus.
Described power factor corrector comprises the first diode, the second diode, the 3rd diode, the 4th diode, the first electric capacity, the second electric capacity, the first switching tube, second switch pipe and the first inductance; Described the first inductance first end and live wire is coupled, the second end and the first diode anode, the second diode cathode are coupled respectively, described the first diode cathode links to each other respectively with the first switching tube first end, the 3rd diode anode, described the 3rd diode cathode links to each other with the first electric capacity first end, described the first electric capacity the second end and zero line are coupled, and described the first switching tube the second end and zero line are coupled; Described the second diode anode links to each other respectively with the 4th diode cathode, second switch pipe the second end, described the 4th diode anode links to each other with the second electric capacity first end, described the second electric capacity the second end and zero line are coupled, and described second switch pipe first end and zero line are coupled.
Described charger comprises the first switch, the 3rd electric capacity, BUCK converter, described the first switch and the 3rd electric capacity are connected across between the first switching tube first end and the second switch pipe first end after linking to each other, and described BUCK converter is coupling between the 3rd electric capacity and the secondary cell.
Described BUCK converter comprises the 3rd switching tube, the second inductance, the 4th electric capacity and the 5th diode; Described the 3rd switching tube first end links to each other with the 3rd electric capacity first end, described the 3rd switching tube the second end links to each other with the 5th diode cathode, described the 5th diode anode links to each other respectively with the 3rd electric capacity the second end, the 4th diode cathode, described the second inductance be connected across the 5th diode two ends after the 4th electric capacity links to each other.
Described BUCK converter comprises the 3rd switching tube, the second inductance, the 4th electric capacity and the 5th diode; Described the 3rd switching tube the second end links to each other with the 3rd electric capacity first end, described the 3rd switching tube first end links to each other with the 5th diode anode, described the 5th diode cathode links to each other respectively with the 3rd electric capacity the second end, the 3rd diode anode, described the second inductance be connected across the 5th diode two ends after the 4th electric capacity links to each other.
Described inverter comprises the second auxiliary switch, the 5th switching tube, the 6th switching tube, the 3rd inductance and the 5th electric capacity; Described the second auxiliary switch first end is connected between the first electric capacity and the second electric capacity, the second end links to each other respectively with the 5th switching tube the second end, the 6th switching tube first end, the 3rd inductance first end, described the 3rd inductance the second end links to each other with zero line through the 5th electric capacity, described the 5th switching tube first end links to each other with the first electric capacity first end, and described the 6th switching tube the second end links to each other with the second electric capacity first end.
Described the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube are respectively field effect transistor or insulated gate bipolar translator power tube or triode.
The beneficial effect that the present invention is compared with the prior art is: the charger of UPS of the present invention is non-isolation, and control is simple, accomplishes easily larger power.The present invention has saved isolating transformer of the prior art, has reduced the cost of UPS, can reduce especially the cost of high power UPS.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment of the invention one;
Fig. 2 is the structural representation of the specific embodiment of the invention two.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further details below by concrete execution mode.
Embodiment one
As shown in Figure 1, a kind of uninterrupted power supply comprises power factor correction (Power Factor
Correction is called for short PFC) device, charger, secondary cell (BATTERY), inverter.Described charger charges to secondary cell, described inverter is three level structures, be used for DC bus-bar voltage is reverse into alternating voltage, described power factor corrector becomes direct voltage to be added on the dc bus and to charger the commercial power rectification when civil power is normal to charge, when city's electrical anomaly with the boost in voltage on the battery to dc bus.The input power of charger of the present invention is taken from power factor corrector.
As shown in Figure 1, described power factor corrector comprises the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first capacitor C 1, the second capacitor C 2, the first switching tube Q1, second switch pipe Q2 and the first inductance L 1.Described the first inductance L 1 first end and live wire L are coupled, and namely link to each other with live wire L through the 3rd switch; Described the first inductance L 1 second end and the first diode D1 anode, the second diode D2 negative electrode are coupled respectively.Described the first diode D1 negative electrode links to each other respectively with the first switching tube Q1 first end, the 3rd diode D3 anode.Described the 3rd diode D3 negative electrode links to each other with the first capacitor C 1 first end, and described the first capacitor C 1 second end and zero line N are coupled.Described the first switching tube Q1 the second end and zero line N are coupled, and described the first switching tube Q1 the 3rd termination has control signal.Described the second diode D2 anode links to each other respectively with the 4th diode D4 negative electrode, second switch pipe Q2 the second end, described the 4th diode D4 anode links to each other with the second capacitor C 2 first ends, described the second capacitor C 2 second ends and zero line N are coupled, described second switch pipe Q2 first end and zero line N are coupled, and described second switch pipe Q2 the 3rd termination has control signal.
As shown in Figure 1, described charger comprises the first switch S 1, the 3rd capacitor C 3, BUCK converter.Be connected across between the first switching tube Q1 first end and the second switch pipe Q2 first end after described the first switch S 1 and the 3rd capacitor C 3 link to each other, described BUCK converter is coupling between the 3rd capacitor C 3 and the secondary cell.
Described BUCK converter comprises the 3rd switching tube Q3, the second inductance L 2, the 4th capacitor C 4 and the 5th diode D5.Described the 3rd switching tube Q3 first end links to each other with the 3rd capacitor C 3 first ends, described the 3rd switching tube Q3 the second end links to each other with the 5th diode D5 negative electrode, described the 5th diode D5 anode links to each other respectively with the 3rd capacitor C 3 second ends, the 4th diode D4 negative electrode, described the second inductance L 2 be connected across the 5th diode D5 two ends after the 4th capacitor C 4 links to each other.
The operation principle of charger is summarized as follows:
During charging, the first switch S 1 closure.In the positive half cycles of input AC, the first switching tube Q1 carries out PFC copped wave work.When the first switching tube Q1 was closed, the civil power input was by live wire (L), the 3rd switch S 3, the first inductance L 1, the first diode D1, the first switching tube Q1, and the loop that zero line (N) forms gives the first inductance L 1 charging.When the first switching tube Q1 turn-offs, the first inductance L 1 at first the reverse parallel connection diode by the first inductance L 1, the first diode D1, the first switch S 1, the 3rd capacitor C 3, second switch pipe Q2 parasitism (if employed switching tube does not have parasitic diode, then can independently add), the loop that forms of N line, L line, the 3rd switch S 3 is to 3 chargings of the 3rd capacitor C, when the voltage on the 3rd capacitor C 3 is higher than positive bus-bar voltage, the first inductance L 1 is passed through L1, D1, D3, C1, the N line, AC_RLY, charge to bus capacitor C1 in the L1 loop.
In the input AC negative half period ripple, second switch pipe Q2 carries out PFC copped wave work, when second switch pipe Q2 was closed, the civil power input gave the first inductance L 1 charging by the loop of N line, second switch pipe Q2, the second diode D2, the first inductance L 1, the 3rd switch S 3, L line composition.When second switch pipe Q2 turn-offs, the first inductance L 1 at first the loop that forms of the reverse parallel connection diode (if employed switching tube does not have parasitic diode, then can independently add) by the first inductance L 1, the 3rd switch S 3, L line, N line, the first switching tube Q1 parasitism, the first switch S 1, the 3rd capacitor C 3, the second diode D2 to 3 chargings of the 3rd capacitor C.When the voltage on the 3rd capacitor C 3 was higher than negative busbar voltage, the first inductance L 1 was charged to bus capacitor C2 by the first inductance L 1, the 3rd switch S 3, N line, the second capacitor C 2, the second diode D2, the first inductance L 1 loop.
In summary, positive-negative half-cycle the first inductance L 1 that exchanges input all can be kept certain positive phase voltage on the 3rd capacitor C 3 to 3 chargings of the 3rd capacitor C, and the 3rd capacitor C 3 can be used as the input source of buck charger.
The 3rd electric capacity is as follows to the process of battery charging: when the 3rd switching tube Q3 opens, give the second inductance L 2 chargings by the 3rd switching tube Q3, the second inductance L 2, the 4th capacitor C 4 (also comprising secondary cell), the 3rd capacitor C 3, the 3rd switching tube Q3 loop.When the 3rd switching tube Q3 turn-offed, the second inductance L 2 was by the second inductance L 2, the 4th capacitor C 4 (also comprising secondary cell), the 5th diode D5 loop afterflow.
Charger of the present invention is non-isolation, and control is simple, accomplishes easily larger power.The present invention has saved isolating transformer of the prior art, has reduced the cost of UPS, can reduce especially the cost of high power UPS.
Described inverter comprises the second auxiliary switch S2, the 5th switching tube Q5, the 6th switching tube Q6, the 3rd inductance L 3 and the 5th capacitor C 5.Described the second auxiliary switch S2 first end is connected between the first capacitor C 1 and the second capacitor C 2, the second end links to each other respectively with the 5th switching tube Q5 the second end, the 6th switching tube Q6 first end, the 3rd inductance L 3 first ends, described the 3rd inductance L 3 second ends link to each other with zero line N through the 5th capacitor C 5, described the 5th switching tube Q5 first end links to each other with the first capacitor C 1 first end, and described the 6th switching tube Q6 the second end links to each other with the second electric capacity first end.The second auxiliary switch S2 sends switching pulse according to the algorithm of setting.The principle of inverter is summarized as follows: during inversion output positive half wave, and the complementary ripple of sending out of the 5th switching tube Q and the second auxiliary switch S2, send+and 0; During the negative half-wave of inversion output, the complementary ripple of sending out of the 6th switching tube Q6 and the second auxiliary switch S2, send-and 0.Inverter of the present invention adopts three level structures, and it is little that pipe is withstand voltage, and efficient is high, and the inductance that needs is less, and integrated cost is lower.
In Fig. 1, described the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4, the 5th switching tube Q5, the 6th switching tube Q6 are respectively field effect transistor.But above-mentioned switching tube use other switching tubes that can be opened, turn-off by control also can, for example: insulated gate bipolar translator power tube or triode.
Embodiment two
As shown in Figure 2, the difference of this embodiment and embodiment one is the connection of charger, and in this embodiment, secondary cell just is being connected to the negative electrode of D1.Concrete structure is: described charger comprises the first switch S 1, the 3rd capacitor C 3, BUCK converter.Be connected across between the first switching tube Q1 first end and the second switch pipe Q2 first end after described the first switch S 1 and the 3rd capacitor C 3 link to each other, described BUCK converter is coupling between the 3rd capacitor C 3 and the secondary cell.Described BUCK converter comprises the 3rd switching tube Q3, the second inductance L 2, the 4th capacitor C 4 and the 5th diode D5; Described the 3rd switching tube Q3 the second end links to each other with the 3rd capacitor C 3 first ends, described the 3rd switching tube Q3 first end links to each other with the 5th diode D5 anode, described the 5th diode D5 negative electrode links to each other respectively with the 3rd capacitor C 3 second ends, the 3rd diode D3 anode, described the second inductance L 2 be connected across the 5th diode D5 two ends after the 4th capacitor C 4 links to each other.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation 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, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. a uninterrupted power supply is characterized in that: comprise power factor corrector, charger, secondary cell, inverter; Described charger charges to secondary cell, described inverter is three level structures, be used for DC bus-bar voltage is reverse into alternating voltage, described power factor corrector becomes direct voltage to be added on the dc bus and to charger the commercial power rectification when civil power is normal to power, when city's electrical anomaly with the boost in voltage on the secondary cell to dc bus; The input power of described charger is taken from described power factor corrector; Described power factor corrector comprises the first diode (D1), the second diode (D2), the 3rd diode (D3), the 4th diode (D4), the first electric capacity (C1), the second electric capacity (C2), the first switching tube (Q1), second switch pipe (Q2) and the first inductance (L1); Described the first inductance (L1) first end and live wire (L) are coupled, the second end and the first diode (D1) anode, the second diode (D2) negative electrode are coupled respectively, described the first diode (D1) negative electrode links to each other respectively with the first switching tube (Q1) first end, the 3rd diode (D3) anode, described the 3rd diode (D3) negative electrode links to each other with the first electric capacity (C1) first end, described the first electric capacity (C1) the second end and zero line (N) are coupled, and described the first switching tube (Q1) the second end and zero line (N) are coupled; Described the second diode (D2) anode links to each other respectively with the 4th diode (D4) negative electrode, second switch pipe (Q2) the second end, described the 4th diode (D4) anode links to each other with the second electric capacity (C2) first end, described the second electric capacity (C2) the second end and zero line (N) are coupled, and described second switch pipe (Q2) first end and zero line (N) are coupled.
2. uninterrupted power supply according to claim 1, it is characterized in that: described charger comprises the first switch (S1), the 3rd electric capacity (C3), BUCK converter, described the first switch (S1) and the 3rd electric capacity (C3) are connected across between the first switching tube (Q1) first end and second switch pipe (Q2) first end after linking to each other, and described BUCK converter is coupling between the 3rd electric capacity (C3) and the secondary cell.
3. uninterrupted power supply according to claim 2, it is characterized in that: described BUCK converter comprises the 3rd switching tube (Q3), the second inductance (L2), the 4th electric capacity (C4) and the 5th diode (D5); Described the 3rd switching tube (Q3) first end links to each other with the 3rd electric capacity (C3) first end, described the 3rd switching tube (Q3) the second end links to each other with the 5th diode (D5) negative electrode, described the 5th diode (D5) anode links to each other respectively with the 3rd electric capacity (C3) the second end, the 4th diode (D4) negative electrode, described the second inductance (L2) be connected across the 5th diode (D5) two ends after the 4th electric capacity (C4) links to each other.
4. uninterrupted power supply according to claim 2, it is characterized in that: described BUCK converter comprises the 3rd switching tube (Q3), the second inductance (L2), the 4th electric capacity (C4) and the 5th diode (D5); Described the 3rd switching tube (Q3) the second end links to each other with the 3rd electric capacity (C3) first end, described the 3rd switching tube (Q3) first end links to each other with the 5th diode (D5) anode, described the 5th diode (D5) negative electrode links to each other respectively with the 3rd electric capacity (C3) the second end, the 3rd diode (D3) anode, described the second inductance (L2) be connected across the 5th diode (D5) two ends after the 4th electric capacity (C4) links to each other.
5. uninterrupted power supply according to claim 1 and 2, it is characterized in that: described inverter comprises the second auxiliary switch (S2), the 5th switching tube (Q5), the 6th switching tube (Q6), the 3rd inductance (L3) and the 5th electric capacity (C5); Described the second auxiliary switch (S2) first end is connected between the first electric capacity (C1) and the second electric capacity (C2), the second end links to each other respectively with the 5th switching tube (Q5) the second end, the 6th switching tube (Q6) first end, the 3rd inductance (L3) first end, described the 3rd inductance (L3) the second end links to each other with zero line (N) through the 5th electric capacity (C5), described the 5th switching tube (Q5) first end links to each other with the first electric capacity (C1) first end, and described the 6th switching tube (Q6) the second end links to each other with the second electric capacity first end.
6. uninterrupted power supply according to claim 5, it is characterized in that: described the first switching tube (Q1), second switch pipe (Q2), the 5th switching tube (Q5), the 6th switching tube (Q6) are respectively field effect transistor or insulated gate bipolar translator power tube or triode.
7. according to claim 3 or 4 described uninterrupted power supplys, it is characterized in that: described inverter comprises the second auxiliary switch (S2), the 5th switching tube (Q5), the 6th switching tube (Q6), the 3rd inductance (L3) and the 5th electric capacity (C5); Described the second auxiliary switch (S2) first end is connected between the first electric capacity (C1) and the second electric capacity (C2), the second end links to each other respectively with the 5th switching tube (Q5) the second end, the 6th switching tube (Q6) first end, the 3rd inductance (L3) first end, described the 3rd inductance (L3) the second end links to each other with zero line (N) through the 5th electric capacity (C5), described the 5th switching tube (Q5) first end links to each other with the first electric capacity (C1) first end, and described the 6th switching tube (Q6) the second end links to each other with the second electric capacity first end.
8. uninterrupted power supply according to claim 7, it is characterized in that: described the first switching tube (Q1), second switch pipe (Q2), the 3rd switching tube (Q3), the 5th switching tube (Q5), the 6th switching tube (Q6) are respectively field effect transistor or insulated gate bipolar translator power tube or triode.
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| CN2008101685636A CN101685973B (en) | 2008-09-26 | 2008-09-26 | Uninterrupted power supply |
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| CN2008101685636A CN101685973B (en) | 2008-09-26 | 2008-09-26 | Uninterrupted power supply |
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| CN101685973A CN101685973A (en) | 2010-03-31 |
| CN101685973B true CN101685973B (en) | 2013-03-20 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814762B (en) * | 2010-04-02 | 2012-10-10 | 艾默生网络能源有限公司 | UPS power supply |
| CN102832688B (en) * | 2011-06-17 | 2015-05-20 | 艾默生网络能源有限公司 | Uninterruptible power supply |
| CN102497095B (en) * | 2011-12-20 | 2014-11-19 | 华为技术有限公司 | Power-factor correction (PFC) topology of uninterrupted power supply |
| CN102709995B (en) * | 2012-06-06 | 2015-07-08 | 华为技术有限公司 | Uninterruptible power supply circuit and control method thereof |
| CN105305857B (en) * | 2015-11-05 | 2018-07-03 | 顺德职业技术学院 | Capacitance-type switch security isolation programmable power supply circuit |
| CN105490551B (en) * | 2015-12-28 | 2018-07-03 | 华为技术有限公司 | A kind of circuit of uninterruptible power supply |
| CN108306508B (en) * | 2018-02-08 | 2023-06-27 | 亚瑞源科技（深圳）有限公司 | High boost type direct current conversion circuit with power factor correction function |
| CN108683247A (en) * | 2018-05-23 | 2018-10-19 | 昆明理工大学 | A kind of uninterruptible power system and method for hybrid fuel cell and ultracapacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039158A (en) * | 1987-02-20 | 1990-01-24 | 株式会社东芝 | Uninterrupted power supply(ups) |
| CN2600968Y (en) * | 2003-01-17 | 2004-01-21 | 朱惠勇 | UPS uninterruption power supply device |
-
2008
- 2008-09-26 CN CN2008101685636A patent/CN101685973B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039158A (en) * | 1987-02-20 | 1990-01-24 | 株式会社东芝 | Uninterrupted power supply(ups) |
| CN2600968Y (en) * | 2003-01-17 | 2004-01-21 | 朱惠勇 | UPS uninterruption power supply device |
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