CN101958561A - Uninterrupted power system supporting active load - Google Patents
Uninterrupted power system supporting active load Download PDFInfo
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- CN101958561A CN101958561A CN2009101613276A CN200910161327A CN101958561A CN 101958561 A CN101958561 A CN 101958561A CN 2009101613276 A CN2009101613276 A CN 2009101613276A CN 200910161327 A CN200910161327 A CN 200910161327A CN 101958561 A CN101958561 A CN 101958561A
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- siding ring
- active load
- battery mode
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Abstract
The invention relates to an uninterrupted power system supporting active load. The uninterrupted power system comprises a converter, a charger, a battery pack and a battery mode controller, wherein the battery pack is connected with the charger and the converter respectively; and the charger charges the battery pack until the battery pack is full. When a mains AC power supply is switched off, the converter converts a DC power supply stored by the battery pack into an AC square wave signal, and is coordinated with the battery mode controller to convert each square wave of the output AC square wave signal into at least two separated square waves, wherein the time interval of the two adjacent separated square waves is not greater than maintenance time. Therefore, the uninterrupted power system generates a discrete square wave AC power supply for the active load in a battery mode and makes the active load shut down when the maintenance time is not exceeded.
Description
Technical field
The present invention relates to a kind of UPS, particularly relate to a kind of UPS of supporting active load.
Background technology
The CBEMA meeting of doing (computer business equipment manufactures association) is used with the computer instrument and equipment for commerce and is concluded a standard, wherein use with computer instrument and equipment standard and must want to bear outage or conversion timing signal more than at least 8 milliseconds at least at commerce, allow commerce use with the computer instrument and equipment the outage or signal conversion process in, can keep a period of time groundwork power supply, the compatibility of increase commerce with the computer instrument and equipment.With power supply unit, commerce is used and is provided with power supply unit with the computer instrument and equipment working power is provided, therefore commerce is used with the power supply unit of computer instrument and equipment and must still can be kept at least 8 milliseconds of output power supplies after outage, to finish shutdown programm smoothly.
See also shown in Figure 7ly, be a kind of circuit block diagram with active power supply supply 30 of the function of holding time, it includes:
One prime filter circuit 31, it includes a bridge rectifier and an active circuit of power factor correction, the bridge rectifier of described prime filter circuit 31 connects a mains ac power supply, described mains ac power supply is converted to DC power supply, adjust the voltage and the current phase unanimity of DC power supply again by described active circuit of power factor correction, improve its power factor value;
One output capacitance C
Bulk, it is connected to the output of the active circuit of power factor correction of described prime filter circuit 31, to export a direct current power supply; And
One direct current is to DC converting circuit 32, and it is connected to described output capacitance C
Bulk, to obtain DC power supply and will export DC/OUT behind the described DC power supply conversion low-voltage dc power supply.
So-called active power supply supply 31 is main a kind of active circuit of power factor correction that adopt, include a time holding circuit in it, please cooperate and consult shown in Fig. 8 A, for inputing to the mains ac power supply voltage waveform of above-mentioned active power supply supply 30, when described AC interruptions, described time holding circuit can provide the DC power supply of its storage and give described output capacitance C
Bulk, postpone described output capacitance C
BulkDC power supply voltage V
BHReduce to low-voltage critical value V
BLTherefore, shown in Fig. 8 B, described holding time (Hold-Up Time) T
HBe maximum voltage V from output capacitance
BHDrop to described low-voltage critical value V
BLTime be the T that holds time
H
Commerce to be used with the computer instrument and equipment and to be operated in order still continuing under mains ac power supply interruption situation at present, so add UPS.Promptly, described UPS be connected in the mains ac power supply and commercial use and the power supply unit of computer instrument and equipment between, when the normal power supply of mains ac power supply, promptly store electric power in wherein, when treating that the mains ac power supply is interrupted, can be that described power supply unit is given in an AC power and output with the power conversions that stores, concerning power supply unit, its AC power is not interrupted, and uses and the computer instrument and equipment and can continued power give commerce; Yet UPS also can't be supported all types of power supply units at present, and particularly active power supply supply be the reasons are as follows and stated.
At first seeing also shown in Figure 9ly, is a UPS 40 and the circuit diagram of active power supply supply 30, and wherein said UPS 40 includes:
One transformer 42, it comprises first siding ring 421 and second siding ring 422, and wherein said first siding ring 421 is to be coupled to a mains ac power supply AC/IN;
One converter 41, it is connected to described transformer 42 second siding rings 422, consists predominantly of a switching circuit Q1Q2 and a controller 411 that is serially connected with second siding ring 422, and described controller is controlled the keying of described switching circuit Q1Q2;
One charger 43, it is connected to described transformer 42 second siding rings 422 by a current rectifying and wave filtering circuit, to obtain a charge power supply;
One battery pack 44, it is connected to the output of described charger 43 and the switching circuit Q1Q2 of converter 41, to charge till being full of by 43 pairs of battery pack of described charger 44, when interrupt the mains ac power supply, described converter 41 is that control switch circuit Q1Q2 opens and closes, and produces a square wave alternating-current ripple power supply and gives described active power supply supply 30.
When civil power alternating current circuit normal power supply, UPS is to enter line model, the mains ac power supply is directly provided give active power supply supply; Otherwise, in the mains ac power supply, to have no progeny, the converter of described UPS is with the direct current conversion output one square wave alternating-current power supply of battery pack, shown in Figure 10 A.As for square wave alternating-current power supply producing method, please cooperate and consult shown in Figure 10 B and the 10C, be to make described switching circuit Q1Q2 include two active switch Q1Q2, and the controller 411 of described converter 41 can alternately be exported two pulse-width modulation signal V
G1V
G2Give two active switch Q1Q2, make two initiatively alternately keyings of switch Q1Q2, and export a square wave alternating-current power supply V
OBut, square wave alternating-current power supply V like this
OExport active power supply supply 30 to, and can't guarantee that described active power supply supply 30 still can normally provide working power.
Please cooperate again and consult shown in Figure 11 A, UPS promptly enters battery mode and exports the square wave alternating-current power supply after the described AC interruptions, for another example shown in Figure 11 B, as square wave alternating-current power supply V
OWherein the OFF time T 12 of the adjacent positive and negative square wave P1P2 of one-period T is greater than the T that holds time of active power supply supply
H, shown in Figure 11 C, the output capacitance C of then described active power supply supply 30
BulkVoltage has been reduced to low pressure critical value V
BL, output power supply no longer is promptly shown in Figure 11 D; Therefore described UPS 40 promptly can't be supported active power supply supply 30 uses.
Summary of the invention
Have and state the square wave alternating-current power supply that UPS enters under the battery mode to be exported in view of this and can't support active power supply supply, the invention provides and a kind ofly support the UPS of active load and improve this shortcoming, to improve the compatibility of UPS and active power supply supply.
Desiring to reach the employed major technique means of above-mentioned purpose is to make described switched power supplier include a battery pack, a charger, a converter and a battery mode controller, wherein said battery pack is connected to described charger and converter respectively, and described battery mode controller is connected to described converter, when described converter enters battery mode because of external ac power source, described battery mode controller is converted at least two with each square wave of ac square wave signal and separates square waves, and the time interval of each two adjacent separation square wave is not more than and holds time.
The invention described above is mainly by described battery mode controller, start the battery mode controller simultaneously after controller entered battery mode, each square wave of output converter output AC square-wave signal is changed at least two separation square waves, and the time interval that makes each two adjacent separation square wave is not more than and holds time, separate square wave to be converted to two, the OFF time in described each cycle of pulse-width modulation signal promptly is separated into three OFF periods, and these three OFF periods all are not more than and hold time again; Therefore, described UPS under battery mode, export OFF time of square wave alternating-current power supply will be not can be greater than holding time, have the time with support and keep the active electric supply of function.
Description of drawings
Fig. 1 is the circuit diagram of the present invention's first preferred embodiment;
Fig. 2 is the circuit diagram of the present invention's second preferred embodiment;
Fig. 3 is the circuit diagram of the present invention's the 3rd preferred embodiment;
Fig. 4 is the circuit diagram of the present invention's the 4th preferred embodiment;
Fig. 5 A to 5C is a voltage oscillogram of the present invention;
Fig. 6 A to 6D is the voltage oscillogram of mains ac power supply and Fig. 1;
Fig. 7 is the voltage oscillogram of existing active power supply supply;
Fig. 8 A and 8B are the output voltage waveforms of mains ac power supply and active power supply supply;
Fig. 9 is the circuit diagram of existing UPS and active power supply supply;
Figure 10 A to 10C is Fig. 9 voltage oscillogram;
Figure 11 A to 11D is the voltage oscillogram that the mains ac power supply reaches.
Description of reference numerals: 10,10a, 10b, 10c-UPS; 11,11a, 11b, 11c-converter; The 111-controller; 112-battery mode controller; The 12-transformer; The 121-first siding ring; 122a, 122b-second siding ring; The 13-charger; The 131-full-wave rectifier; The 14-battery pack; The 15-full bridge switching circuit; 16-half-bridge switch circuit; The 17-direct current is to direct current transducer; The 18-transformer; The 181-first siding ring; The 182-second siding ring; The 19-full-wave rectifier; The active power supply supply of 20-; 21-prime filter circuit; The 22-direct current is to direct-current power supply converting circuit; The active power supply supply of 30-; 31-prime filter circuit; The 32-direct current is to direct-current power supply converting circuit; The 40-UPS; The 41-converter; The 42-transformer; The 43-charger; The 44-battery pack.
Embodiment
Below cooperate graphic and of the present invention preferred embodiment, further setting forth the present invention is to reach the technological means that predetermined goal of the invention is taked.
See also shown in Figure 1ly, be the calcspar of UPS circuit one preferred embodiment of the present invention, it includes:
One converter 11, consist predominantly of initiatively switch Q1Q2 of a controller 111, a battery mode controller 112, a transformer 12 and two, wherein said controller 111 is the control ends that are connected to described active switch Q1Q2 by battery mode controller 112, described is each square wave that controller 111 exports each pulse-width modulation signal of described active switch Q1Q2 to be converted at least two separate square waves with battery mode controller 112, and the time interval of each two adjacent separation square wave is not more than and holds time; Wherein said holding time is higher than 8 milliseconds; Described in the present embodiment converter 11 is a push-pull type converter, so its transformer 12 is to comprise a centre tap primary side lateral coil 121 and two groups of second siding ring 122a, 122b, the centre tap end of wherein said centre tap first siding ring 121 is connected to battery pack 14, two ends of first siding ring 121 then connect respectively by correspondence initiatively switch Q1Q2 be connected to earth terminal, wherein one group of secondary side 122a is coupled to a mains ac power supply AC/IN and active load 20;
One charger 13 is to be connected to described transformer 12 another group second siding ring 122b by a full-wave rectifier 131, to obtain a charge power supply;
One battery pack 14, it is connected to the output of described charger 13 and the active switch Q1Q2 of converter 111, to charge till being full of by 13 pairs of battery pack of described charger 14, when interrupt the mains ac power supply, described controller 111 is promptly controlled initiatively switch Q1Q2 keying, produces a square wave alternating-current power supply.See also shown in Figure 2ly, be the circuit block diagram of another kind of low frequency UPS 10a, its main different its converter 11a that are with first preferred embodiment are a full-bridge current device, and it includes:
One controller 111, it is connected with described battery mode controller 112, starts described battery mode controller 112 when entering battery mode;
One full bridge switching circuit 15 is to be formed in parallel by two groups of half-bridge switch circuit, and its sys node is connected to battery pack 14; And
One transformer 12, it includes one group of first siding ring 121 and two groups of second siding ring 122a, 122b, described first siding ring 121 is connected to the series connection node of two half-bridge switch circuit, and wherein a second siding ring 122a is connected in for external ac power source AC/ON and active load to connect, and another group second siding ring 122b then is connected with charger 13 by a full-wave rectifier 131.
See also shown in Figure 3ly, be the circuit block diagram of another low frequency UPS 10b, it is to use a kind of semi-bridge converter device 11b, and wherein said semi-bridge converter device is to include:
One controller 111, it is connected with described battery mode controller 112, starts described battery mode controller 112 when entering battery mode;
One half-bridge switch circuit 16, its two ends are connected to battery pack 14; And
One transformer 12, it includes one group of first siding ring 121 and two groups of second siding ring 122a, 122b, described first siding ring 121 is connected to the series connection node and the earth terminal of described half-bridge switch circuit 16, and wherein a second siding ring 122a is connected in for external ac power source AC/IN and active load 20 connections, and another group second siding ring 122b then is connected with charger 13 by a full-wave rectifier 131.
Introduce three kinds of low frequency UPSs except aforementioned, the present invention also can be applicable to a kind of high frequency UPS 10c, just as shown in Figure 4, it includes a battery pack 14, a converter 11c and a charger 13 equally, and further between battery pack 14 and described converter 11c, be provided with a direct current, and between converter 11c output, external ac power source AC/IN and active load 20, be respectively equipped with two diverter switch SW1, SW2 direct current transducer 17.When external ac power source AC/IN normal power supply, two diverter switch SW1, SW2 make AC power AC/IN be connected to active load 20; Otherwise two diverter switch SW1, SW2 then switch to the output of converter 11c, give active load 20 to obtain interchange dispersion square wave signal.
The direct current of present embodiment is a push-pull type transducer to direct current transducer 17, and it includes:
One interphase reactor transformer 18, it includes first siding ring 181 and one group of second siding ring 182 of two groups of serial connections, and the centre tap end of wherein said serial connection first siding ring 181 is connected to described battery pack 14; Wherein said second siding ring 182 is to be connected with converter 11c input by a full-wave rectifier 19; And
Two active switch Q1, Q2 are to be connected to respectively between two ends and earth terminal of described serial connection first siding ring 181.
The converter 11c of present embodiment includes again:
One controller 111, it is connected with described battery mode controller 112, starts described battery mode controller 112 when entering battery mode; And
One full-bridge type switching circuit G1～G4 is to be formed in parallel by two groups of half-bridge switch circuit G1G2/G3G4, and its sys node is connected to described full-wave rectifier 19, and wherein two series connection nodes of two half-bridge switch circuit G1G2/G3G4 are connected to two diverter switch SW1, SW2.
Below, see also shown in Fig. 1 and Fig. 5 A to 5C, when controller 111 enters battery mode, can export first and second pulse-width modulation signal V ' respectively by described battery mode controller 112 further with above-mentioned first preferred embodiment explanation circuit operation of the present invention
G1V '
G2To first and second active switch Q1Q2.Shown in Fig. 5 B and Figure 10 B, the first pulse-width modulation signal V '
G1Each square wave include two and separate square wave P11P12, this two ON time t0-t1 that separates square wave P11P12, the t2-t3 addition is the first pulsewidth tonal signal V that equals former controller 111 outputs
G1ON time T 11, in like manner shown in Fig. 5 C and Figure 10 C, the second pulse-width modulation signal V '
G2Each square wave include two and separate square wave P21P22, this two ON time t4-t5 that separates square wave P21P22, the t6-t7 addition is the second pulsewidth tonal signal V that equals former controller 111 outputs
G2ON time T 11.Again with the identical cycle, shown in Fig. 5 A and 5B, OFF time T between adjacent positive square wave in the square wave ac signal one-period T and the losing side ripple
Gap, can be because each square wave P1P2 includes the separation square wave P11P12 more than two, P21P22, and be shorter than first and second pulse-width modulation signal V that described controller 111 is exported
G1V
G2The OFF time T 12 of two adjacent square waves.
Please cooperate and consult shown in Fig. 6 A, have no progeny in the civil power AC signal, described controller 111 can enter battery mode and export first and second pulse-width modulation signal V
G1V
G2, described first and second pulse-width modulation signal V
G1V
G2Further be converted to first and second pulse-width modulation signal V ' through battery mode controller 111
G1V '
G2, make first and second pulse-width modulation signal V '
G1V '
G2Each square wave include separation square wave P11P12 more than two, P21P22; And then make UPS export the dispersion square wave AC signal, because dispersion square wave AC signal V '
OAdjacent positive and negative separation square wave between OFF time, two adjacent positive separation square wave P11P12 all be not more than with two adjacent negative OFF times of separating square wave P21P22 and hold time 8 milliseconds; Therefore, shown in Fig. 6 C and 6D, the output capacitance voltage V of active power supply supply 20
BCan not be lower than low pressure critical value V
BL, guarantee that active power supply supply 20 can be compatible with UPS 10, when interrupting in the mains ac power supply, still can be so that working power to be provided smoothly.
Please the invention described above be mainly by described battery mode controller, controller is entered the square wave that each pulse-width modulation signal of switching circuit is given in output behind the battery mode, further be converted at least two and separate square wave, and the time interval that makes each two adjacent separation square wave is not more than and holds time, separate square wave to be converted to two, the OFF time in described each cycle of pulse-width modulation signal promptly is separated into three OFF periods, and these three OFF periods all are not more than and hold time again; Therefore, described UPS in battery mode down the OFF time of output square wave alternating-current power supply will be not can be greater than holding time, have the time with support and keep the active electric supply of function.
More than explanation is just illustrative for the purpose of the present invention, and nonrestrictive, those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited, can make many modifications, change; or equivalence, but all will fall within the scope of protection of the present invention.
Claims (9)
1. UPS of supporting active load, it includes a battery pack, a charger and a converter, wherein said battery pack is connected to described charger and converter respectively, it is characterized in that, further include a battery mode controller, described battery mode controller is connected to described converter, when described converter enters battery mode because of external ac power source, described battery mode controller is converted at least two with each square wave of ac square wave signal and separates square waves, and the time interval of each two adjacent separation square wave is not more than and holds time.
2. according to the UPS of the active load of the described support of claim 1, it is characterized in that described holding time is 8 milliseconds.
3. according to the UPS of the active load of the described support of claim 2, it is characterized in that described converter is a push-pull type converter, it includes:
One controller, it is connected with described battery mode controller, starts described battery mode controller when entering battery mode;
One interphase reactor transformer, it includes first siding ring and two groups of second siding rings of two groups of serial connections, the centre tap end of wherein said serial connection first siding ring is connected to described battery pack, two ends then connect earth terminal by an active switch respectively in addition, wherein a second siding ring then connects for external ac power source and active load, and another group second siding ring then is connected with described charger by a full-wave rectifier.
4. according to the UPS of the active load of the described support of claim 2, it is characterized in that described converter is a full-bridge current device, it includes:
One controller, it is connected with described battery mode controller, starts described battery mode controller when entering battery mode;
One full bridge switching circuit is to be formed in parallel by two groups of half-bridge switch circuit, and its sys node is connected to described battery pack;
One transformer, it includes one group of first siding ring and two groups of second siding rings, described first siding ring is connected to the series connection node of two half-bridge switch circuit, and wherein a second siding ring is connected in for external ac power source and active load connection, and another group second siding ring then is connected with described charger by a full-wave rectifier.
5. according to the UPS of the active load of the described support of claim 2, it is characterized in that described converter is a semibridge system converter, it includes:
One controller, it is connected with described battery mode controller, starts described battery mode controller when entering battery mode;
One half-bridge switch circuit, its two ends are connected to described battery pack;
One transformer, it includes one group of first siding ring and two groups of second siding rings, described first siding ring is connected to the series connection node and the earth terminal of described half-bridge switch circuit, and wherein a second siding ring is connected in for external ac power source and active load connection, and another group second siding ring then is connected with described charger by a full-wave rectifier.
6. according to the UPS of the active load of the described support of claim 2, it is characterized in that, further include a direct current to direct current transducer, it is connected between described battery pack and the described converter, and the output of described converter is connected with external ac power source and active load by diverter switch again.
7. according to the UPS of the active load of the described support of claim 2, it is characterized in that, further include:
One direct current is to direct current transducer, and it is connected between described battery pack and the described converter;
Two diverter switches, it is connected between converter output, external ac power source and the active load.
8. according to the UPS of the active load of the described support of claim 7, it is characterized in that described direct current is a push-pull type transducer to direct current transducer, it includes:
One interphase reactor transformer, it includes first siding ring and one group of second siding ring of two groups of serial connections, and the centre tap end of wherein said serial connection first siding ring is connected to described battery pack; Wherein said second siding ring is to be connected with described converter input by a full-wave rectifier;
Two active switches, it is connected to respectively between two ends and earth terminal of described serial connection first siding ring.
9. the UPS of the active load of described according to Claim 8 support is characterized in that, described converter is to include:
One controller, it is connected with described battery mode controller, starts described battery mode controller when entering battery mode;
One full-bridge type switching circuit is to be formed in parallel by two groups of half-bridge switch circuit, and its sys node is connected to described full-wave rectifier, and wherein two series connection nodes of two half-bridge switch circuit are connected to described two diverter switches.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101613276A CN101958561A (en) | 2009-07-20 | 2009-07-20 | Uninterrupted power system supporting active load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101613276A CN101958561A (en) | 2009-07-20 | 2009-07-20 | Uninterrupted power system supporting active load |
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| CN101958561A true CN101958561A (en) | 2011-01-26 |
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| CN2009101613276A Pending CN101958561A (en) | 2009-07-20 | 2009-07-20 | Uninterrupted power system supporting active load |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390928A (en) * | 2012-05-08 | 2013-11-13 | 硕天科技股份有限公司 | Uninterruptible power supply and method for controlling uninterruptible power supply to output waveforms |
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| US6359794B1 (en) * | 1999-12-01 | 2002-03-19 | Acme Electric Corporation | Battery backup power supply |
| CN1909322A (en) * | 2005-08-05 | 2007-02-07 | 上海隽睿自动化技术有限公司 | Uninterrupted power source for electric motor |
| CN101075746A (en) * | 2006-05-17 | 2007-11-21 | 台达电子工业股份有限公司 | Low-consumption uninterrupted power-supply system |
| CN101399458A (en) * | 2007-09-30 | 2009-04-01 | 硕天科技股份有限公司 | Energy saving type uninterrupted power source |
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2009
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6359794B1 (en) * | 1999-12-01 | 2002-03-19 | Acme Electric Corporation | Battery backup power supply |
| CN1909322A (en) * | 2005-08-05 | 2007-02-07 | 上海隽睿自动化技术有限公司 | Uninterrupted power source for electric motor |
| CN101075746A (en) * | 2006-05-17 | 2007-11-21 | 台达电子工业股份有限公司 | Low-consumption uninterrupted power-supply system |
| CN101399458A (en) * | 2007-09-30 | 2009-04-01 | 硕天科技股份有限公司 | Energy saving type uninterrupted power source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103390928A (en) * | 2012-05-08 | 2013-11-13 | 硕天科技股份有限公司 | Uninterruptible power supply and method for controlling uninterruptible power supply to output waveforms |
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Application publication date: 20110126 |