CN101567573A - Uninterrupted power and control method thereof - Google Patents
Uninterrupted power and control method thereof Download PDFInfo
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- CN101567573A CN101567573A CNA2009101054050A CN200910105405A CN101567573A CN 101567573 A CN101567573 A CN 101567573A CN A2009101054050 A CNA2009101054050 A CN A2009101054050A CN 200910105405 A CN200910105405 A CN 200910105405A CN 101567573 A CN101567573 A CN 101567573A
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Abstract
The invention discloses an uninterrupted power and control method thereof, wherein the uninterrupted power comprises a voltage boosting module and an inversion module and the voltage boosting module comprises a first switch tube, a second inductance, a first diode, a first capacitance, a second capacitance, a second diode, a first inductance and a second switch tube and a third switch tube and a fourth switch tube and the source electrode of the third switch tube is coupled with the source electrode of the first switch tube and the drain electrode of the second switch tube and the source electrode of the third switch tube is coupled between the second inductance and the first diode anode and the drain electrode of the fourth switch tube is coupled between the source electrode of the first switch tube and the drain electrode of the second switch tube and the source electrode of the fourth switch tube is coupled between the first inductance and the second diode cathode; the drain electrode of the first switch tube is coupled between the battery anode and the second inductance and the source electrode of the second switch tube is coupled between the battery cathode and the first inductance. The circuit structure is high and the efficiency is high.
Description
Technical field
The present invention relates to a kind of uninterrupted power supply, the invention still further relates to a kind of control method of uninterrupted power supply.
Background technology
Existing uninterrupted power supply circuit structure more complicated, efficient are low.
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 simple uninterrupted power supply and control method thereof.
Technical problem of the present invention is solved by following technical scheme: a kind of uninterrupted power supply, comprise boost module and inversion module, described boost module boosts cell voltage and exports inversion module under battery mode, described inversion module is reverse into AC signal with the d. c. voltage signal that receives, described boost module comprises first switching tube, second inductance, first diode, first electric capacity, second electric capacity, second diode, first inductance and the second switch pipe that links to each other successively, and the 3rd switching tube and the 4th switching tube; Described the 3rd switching tube source-coupled is between the drain electrode of the source electrode of described first switching tube and second switch pipe, described the 3rd switching tube drain coupled is between second inductance and first diode anode, described the 4th switching tube drain coupled is between the drain electrode of the source electrode of described first switching tube and second switch pipe, and described the 4th switching tube source-coupled is between first inductance and second diode cathode; The described first switching tube drain coupled is between the anode and second inductance, and described second switch pipe source-coupled is between the battery cathode and first inductance.
Described uninterrupted power supply, also comprise first current transformer and second current transformer, described the 3rd switching tube drain electrode is connected between second inductance and first diode anode through the former limit of first current transformer, and described the 4th switching tube source electrode is connected between first inductance and second diode cathode through the former limit of second current transformer; The secondary of described first current transformer and second current transformer is coupled respectively to the current acquisition module, described current acquisition module and boost module controller are coupled, described current acquisition module acquisition stream is crossed the electric current on first inductance or second inductance and is exported the boost module controller to, and described boost module controller exports electric current and the given passing ratio control generation corresponding control signal that compares again of electric current loop that flows through on first inductance or second inductance to the 4th switching tube or the 3rd switching tube.
A kind of control method to above-mentioned uninterrupted power supply, whether the modulation signal of controller of judging inversion module is greater than first preset value, if then export Continuity signal to second switch pipe, cut-off signals to the first switching tube; If otherwise whether the modulation signal of controller of judging inversion module is less than second preset value, if then export Continuity signal to the first switching tube, cut-off signals to the second switch pipe, if otherwise output cut-off signals to the first switching tube and second switch pipe.
Described control method also comprises: described second switch pipe is open-minded prior to the 3rd switching tube, and described the 3rd switching tube is closed prior to the second switch pipe; Described first switching tube is open-minded prior to the 4th switching tube, and described the 4th switching tube is closed prior to first switching tube.
Described control method also comprises gathers the electric current that flows through on first inductance, second inductance, compare again passing ratio control and produce corresponding control signal and export the 4th switching tube or the 3rd switching tube to the electric current that flows through on first inductance or second inductance and electric current loop are given so that the electric current that flows through on first inductance, second inductance be locked in electric current loop given on.
The beneficial effect that the present invention is compared with the prior art is: uninterrupted power supply circuit of the present invention is simple in structure, efficient is high.Control method of the present invention can reduce the stress of switching tube, improves overall efficiency under the battery mode.
Description of drawings
Fig. 1 is the structural representation of the uninterrupted power supply of the specific embodiment of the invention;
Fig. 2 is that the uninterrupted power supply of the specific embodiment of the invention is operated in inversion negative half period induction charging process schematic diagram;
Fig. 3 is that the uninterrupted power supply of the specific embodiment of the invention is operated in inversion negative half period inductive discharge process schematic diagram;
Fig. 4 is that the uninterrupted power supply of the specific embodiment of the invention is operated in the negative positive all induction charging process schematic diagrames of inversion;
Fig. 5 is that the uninterrupted power supply of the specific embodiment of the invention is operated in the positive half cycle inductive discharge of inversion process schematic diagram;
Fig. 6 is that the uninterrupted power supply of the specific embodiment of the invention is operated in the positive half cycle inductive discharge of inversion process schematic diagram;
Fig. 7 is the control schematic diagram of uninterrupted power supply under battery mode of the specific embodiment of the invention.
Embodiment
Also in conjunction with the accompanying drawings the present invention is described in further details below by concrete execution mode.
As shown in Figure 1, a kind of uninterrupted power supply comprises boost module and inversion module, and described boost module boosts cell voltage and exports inversion module under battery mode, and described inversion module is reverse into AC signal with the d. c. voltage signal that receives.Described boost module comprises the first switching tube Q1, second inductance L 2, the first diode D1, first capacitor C 1, second capacitor C 2, the second diode D2, first inductance L 1, second switch pipe Q2, the 3rd switching tube Q3 and the 4th switching tube Q4.
As shown in Figure 1, the described first switching tube Q1, second inductance L 2, the first diode D1, first capacitor C 1, second capacitor C 2, the second diode D2, first inductance L 1 and second switch pipe Q2, and the 3rd switching tube Q3 links to each other successively with the 4th switching tube Q4.
Described the 3rd switching tube Q3 source-coupled is between the drain electrode of the source electrode of the described first switching tube Q1 and second switch pipe Q2, described the 3rd switching tube Q3 drain coupled is between second inductance L 2 and the first diode D1 anode, described the 4th switching tube Q4 drain coupled is between the drain electrode of the source electrode of the described first switching tube Q1 and second switch pipe Q2, and described the 4th switching tube Q4 source-coupled is between first inductance L 1 and the second diode D2 negative electrode.
The described first switching tube Q1 drain coupled is between the anode and second inductance L 2, and described second switch pipe Q2 source-coupled is between the battery cathode and first inductance L 1.Particularly, described first switching tube Q1 drain electrode links to each other with anode through the 3rd relay R Y3, fuse F4, and described second switch pipe Q2 source electrode links to each other with battery cathode.
As shown in Figure 1, described uninterrupted power supply also comprises the first current transformer CT1 and the second current transformer CT2, current acquisition module and boost module controller (figure does not show).Described the 3rd switching tube Q3 drain electrode is connected between second inductance L 2 and the first diode D1 anode through the former limit of the first current transformer CT1, and described the 4th switching tube Q4 source electrode is connected between first inductance L 1 and the second diode D2 negative electrode through the former limit of the second current transformer CT2.The secondary of the described first current transformer CT1 is coupled to the current acquisition module, and the secondary of the second current transformer CT2 also is coupled to the current acquisition module, and described current acquisition module and boost module controller are coupled.Described current acquisition module acquisition stream is crossed the electric current on first inductance L 1 or second inductance L 2 and is exported the boost module controller to, and described boost module controller exports electric current and the given passing ratio control generation corresponding control signal that compares again of electric current loop that flows through on first inductance L 1 or second inductance L 2 to the 4th switching tube Q4 or the 3rd switching tube Q3.Described control signal is pulse-width modulation (Pulse Width Modulation is called for short a PWM) signal, by regulating the duty ratio of pwm signal, can change the electric current that flows through on first inductance L 1 or second inductance L 2.
Uninterrupted power supply shown in Figure 1 is single-phase output.The single-phase output of inversion module is all to compare steadily from being rectified to inversion for the energy that can make UPS.
The operation principle of above-mentioned uninterrupted power supply is as follows:
As shown in Figure 2, when inversion was in negative half period, the first switching tube Q1 was open-minded, and switching frequency can be 100HZ, and the 4th switching tube Q4 does high frequency chopping, when the 4th switching tube Q4 opens, and 1 energy storage of first inductance L, its current direction is seen Fig. 2.
As shown in Figure 3, when the first switching tube Q1 conducting, when the 4th switching tube Q4 turn-offed, negative busbar (C2) charging was given in 1 discharge of first inductance L, and its current direction is seen Fig. 3.
As shown in Figure 4, when inversion was in positive half cycle, Q2 was open-minded for the second switch pipe, and switching frequency can be 100HZ, and the 3rd switching tube Q3 does high frequency chopping, when the 3rd switching tube Q3 conducting, and 2 energy storage of second inductance L, its current direction is as shown in Figure 4.
As shown in Figure 5, when second switch pipe Q2 conducting, when the 3rd switching tube Q3 turn-offed, positive bus-bar (C1) charging was given in 2 discharges of second inductance L, and its current direction as shown in Figure 5
In order to keep stablizing of bus, just important to the control of the first switching tube Q1 and second switch pipe Q2 so under battery mode.As shown in Figure 6, above-mentioned UPS can adopt following control method: whether the modulation signal of controller of judging inversion module is greater than the first preset value a, if then export Continuity signal to second switch pipe Q2, cut-off signals to the first switching tube Q1; If otherwise whether the modulation signal of controller of judging inversion module is less than second preset value-b, if then export Continuity signal to the first switching tube Q1, cut-off signals, if otherwise output cut-off signals to the first switching tube Q1 and second switch pipe Q2 to second switch pipe Q2.In Fig. 6, sine wave is the reference waveform of modulation signal of the controller of inversion module.A1～a2 during this period of time in second switch pipe Q2 conducting, the first switching tube Q1 turn-off, b1～b2 during this period of time in the Q1 conducting, the first switching tube Q1 conducting, second switch pipe Q2 shutoff have generated the dead band during this period of time naturally at a2～b1.
According to analysis, in the loop that should form by second switch pipe Q2 and the 3rd switching tube Q3 of the positive half cycle correspondence of inversion to the UPS operation principle; In the loop that the negative half period of inversion should be made up of the first switching tube Q1 and the 4th switching tube Q4.Control to the first switching tube Q1 and second switch pipe Q2 must replace synchronously with the positive and negative of inversion, again because Q1 and Q2 are connected in parallel on the positive and negative two ends of battery, so the first switching tube Q1 and second switch pipe Q2 can not lead directly to, not so can short circuit battery, so will leave Dead Time between the first switching tube Q1 and the second switch pipe Q2, but the time that Dead Time can not stay is oversize, not so can have influence on the inversion waveform.
In addition, in the course of work of UPS, there is the process of phase-locked adjusting in inversion module, such as, switch to battery when importing by civil power, the tracing object of inversion has become local oscillator from bypass so, so in the phase-locked adjustment process of inversion, in order to keep the stable of bus, we have selected the modulation signal of controller of inversion module as the control reference waveform of the first switching tube Q1 and second switch pipe Q2.In the phase-locked process of inversion, the phase shift of inversion waveform is bigger, adopt the control of method of the present invention to the first switching tube Q1 and second switch pipe Q2, can guarantee inversion output smooth transition in whole phase-locked process, guarantee that the balance of the energy of input and output can not cause that bus has big fluctuation yet.
Among the present invention, generate the dead band, do not use the method for the fixing delay time of leaving of prior art because be difficult to guarantee the transient changing of inverter under various operating modes like this, we directly utilize positive-negative half-cycle threshold value a ,-b, generated the dead band naturally.Though this dead band can cause not having sending of control waveform at the zero crossing place of inversion, but this time, be that resistive year or rectification carry all be that electric current is zero in other words near moment of zero,, can not cause the distortion of inversion waveform so can support fully by the energy of bus capacitor.
Among the present invention, the work schedule of boost module will match with the inversion sequential, and this can guarantee the mobile stably bus ripple and the reactive loss of reducing of energy of complete machine.
Above-mentioned UPS also adopts following control method:
Described second switch pipe Q2 is open-minded prior to the 3rd switching tube Q3, and described the 3rd switching tube Q3 closes prior to second switch pipe Q2; The described first switching tube Q1 is open-minded prior to the 4th switching tube Q4, and described the 4th switching tube Q4 closes prior to the first switching tube Q1.This has been avoided producing high pressure stress at the first switching tube Q1 and second switch pipe Q2 two ends,
As shown in Figure 7, above-mentioned UPS also adopts following control method:
Gather the electric current that flows through on first inductance L 1, second inductance L 2, compare again passing ratio control and produce corresponding control signal and export the 4th switching tube Q4 or the 3rd switching tube Q3 to the electric current that flows through on first inductance L 1 or second inductance L 2 and electric current loop are given so that the electric current that flows through on first inductance L 1, second inductance L 2 be locked in electric current loop given on.Owing to leave Dead Time between the first switching tube Q1 and the second switch pipe Q2, battery current is at set intervals under the fully loaded situation of UPS output band so, will at interval the other end time changes to rated value more then from the rated value vanishing, in this case, bigger distortion can take place with power frequency period in battery current, has so just influenced the overall efficiency under the battery mode.The present invention can avoid above-mentioned situation, improve dynamic response capability, the raising overall efficiency of UPS under battery mode.
The present invention has good battery current effect for the single Battery pack of raising produces positive and negative busbar in UPS topology, because under the general situation at positive negative bipolar sexupara line, generally can each use a Battery pack to positive and negative busbar, the electric current of battery is exactly to be in continuous state substantially like this, but when adopting single Battery pack, battery current just needs artificial being controlled to reach level and smooth purpose.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. uninterrupted power supply, comprise boost module and inversion module, described boost module boosts cell voltage and exports inversion module under battery mode, described inversion module is reverse into AC signal with the d. c. voltage signal that receives, it is characterized in that: described boost module comprises first switching tube (Q1) that links to each other successively, second inductance (L2), first diode (D1), first electric capacity (C1), second electric capacity (C2), second diode (D2), first inductance (L1) and second switch pipe (Q2), and the 3rd switching tube (Q3) and the 4th switching tube (Q4); Described the 3rd switching tube (Q3) source-coupled is between the drain electrode of the source electrode of described first switching tube (Q1) and second switch pipe (Q2), described the 3rd switching tube (Q3) drain coupled is between second inductance (L2) and first diode (D1) anode, described the 4th switching tube (Q4) drain coupled is between the drain electrode of the source electrode of described first switching tube (Q1) and second switch pipe (Q2), and described the 4th switching tube (Q4) source-coupled is between first inductance (L1) and second diode (D2) negative electrode; Described first switching tube (Q1) drain coupled is between anode and second inductance (L2), and described second switch pipe (Q2) source-coupled is between battery cathode and first inductance (L1).
2. uninterrupted power supply according to claim 1, it is characterized in that: also comprise first current transformer (CT1) and second current transformer (CT2), described the 3rd switching tube (Q3) drain electrode is connected between second inductance (L2) and first diode (D1) anode through the former limit of first current transformer (CT1), and described the 4th switching tube (Q4) source electrode is connected between first inductance (L1) and second diode (D2) negative electrode through the former limit of second current transformer (CT2); The secondary of described first current transformer (CT1) and second current transformer (CT2) is coupled respectively to the current acquisition module, described current acquisition module and boost module controller are coupled, described current acquisition module acquisition stream is crossed the electric current on first inductance (L1) or second inductance (L2) and is exported the boost module controller to, and described boost module controller exports electric current and the given passing ratio control generation corresponding control signal that compares again of electric current loop that flows through on first inductance (L1) or second inductance (L2) to the 4th switching tube (Q4) or the 3rd switching tube (Q3).
3. control method to the described uninterrupted power supply of claim 1, it is characterized in that: whether the modulation signal of controller of judging inversion module is greater than first preset value, if then export Continuity signal to second switch pipe (Q2), cut-off signals to the first switching tube (Q1); If otherwise whether the modulation signal of controller of judging inversion module is less than second preset value, if then export Continuity signal to the first switching tube (Q1), cut-off signals, if otherwise output cut-off signals to the first switching tube (Q1) and second switch pipe (Q2) to second switch pipe (Q2).
4. control method according to claim 3 is characterized in that: described second switch pipe (Q2) is open-minded prior to the 3rd switching tube (Q3), and described the 3rd switching tube (Q3) is closed prior to second switch pipe (Q2); Described first switching tube (Q1) is open-minded prior to the 4th switching tube (Q4), and described the 4th switching tube (Q4) is closed prior to first switching tube (Q1).
5. control method according to claim 3, it is characterized in that: also comprise and gather the electric current that flows through on first inductance (L1), second inductance (L2), compare again passing ratio control and produce corresponding control signal and export the 4th switching tube (Q4) or the 3rd switching tube (Q3) to the electric current that flows through on first inductance (L1) or second inductance (L2) and electric current loop are given so that the electric current that flows through on first inductance (L1), second inductance (L2) be locked in electric current loop given on.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101860055A (en) * | 2010-05-07 | 2010-10-13 | 艾默生网络能源有限公司 | Switching tube control method for UPS |
| CN101834461B (en) * | 2009-12-16 | 2012-07-18 | 艾默生网络能源有限公司 | Discharge circuit of UPS (Uninterrupted Power Supply) battery |
| CN103828185A (en) * | 2011-07-28 | 2014-05-28 | 施耐德电气It公司 | Dual boost converter for ups system |
| CN104638744A (en) * | 2013-11-08 | 2015-05-20 | 艾默生网络能源有限公司 | Battery pack articulated circuit of constant power supply and constant power supply |
| CN106160184A (en) * | 2015-04-09 | 2016-11-23 | 艾默生网络能源有限公司 | A kind of UPS topological circuit |
| CN106685381A (en) * | 2015-11-04 | 2017-05-17 | 山特电子（深圳）有限公司 | PWM (Pulse Width Modulation) signal frequency adjusting method and device of UPS (Uninterrupted Power Source) |
| CN112039352A (en) * | 2020-07-31 | 2020-12-04 | 漳州科华技术有限责任公司 | UPS control method |
| CN117613667A (en) * | 2024-01-23 | 2024-02-27 | 湘潭无线电有限责任公司 | Laser pulse diode driver power supply control circuit |
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| US5684686A (en) * | 1994-01-12 | 1997-11-04 | Deltec Electronics Corporation | Boost-input backed-up uninterruptible power supply |
| CN2689566Y (en) * | 2004-02-10 | 2005-03-30 | 山特电子（深圳）有限公司 | Uninterruptible power supply with battery shared |
| CN1808832B (en) * | 2005-01-19 | 2010-05-05 | 中兴通讯股份有限公司 | Circuit apparatus applicable to middle and high power UPS |
| US7402921B2 (en) * | 2005-04-21 | 2008-07-22 | American Power Conversion Corporation | Method and apparatus for providing uninterruptible power |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101834461B (en) * | 2009-12-16 | 2012-07-18 | 艾默生网络能源有限公司 | Discharge circuit of UPS (Uninterrupted Power Supply) battery |
| CN101860055B (en) * | 2010-05-07 | 2012-11-21 | 艾默生网络能源有限公司 | Switching tube control method for UPS |
| CN101860055A (en) * | 2010-05-07 | 2010-10-13 | 艾默生网络能源有限公司 | Switching tube control method for UPS |
| CN103828185A (en) * | 2011-07-28 | 2014-05-28 | 施耐德电气It公司 | Dual boost converter for ups system |
| CN103828185B (en) * | 2011-07-28 | 2016-06-22 | 施耐德电气It公司 | Double; two boost converters for ups system |
| CN104638744B (en) * | 2013-11-08 | 2017-04-19 | 艾默生网络能源有限公司 | Battery pack articulated circuit of constant power supply and constant power supply |
| CN104638744A (en) * | 2013-11-08 | 2015-05-20 | 艾默生网络能源有限公司 | Battery pack articulated circuit of constant power supply and constant power supply |
| CN106160184A (en) * | 2015-04-09 | 2016-11-23 | 艾默生网络能源有限公司 | A kind of UPS topological circuit |
| CN106160184B (en) * | 2015-04-09 | 2019-01-11 | 维谛技术有限公司 | A kind of UPS topological circuit |
| CN106685381A (en) * | 2015-11-04 | 2017-05-17 | 山特电子（深圳）有限公司 | PWM (Pulse Width Modulation) signal frequency adjusting method and device of UPS (Uninterrupted Power Source) |
| CN112039352A (en) * | 2020-07-31 | 2020-12-04 | 漳州科华技术有限责任公司 | UPS control method |
| CN112039352B (en) * | 2020-07-31 | 2021-10-01 | 漳州科华技术有限责任公司 | UPS control method |
| CN117613667A (en) * | 2024-01-23 | 2024-02-27 | 湘潭无线电有限责任公司 | Laser pulse diode driver power supply control circuit |
| CN117613667B (en) * | 2024-01-23 | 2024-03-26 | 湘潭无线电有限责任公司 | Laser pulse diode driver power supply control circuit |
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| CN101567573B (en) | 2011-11-30 |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
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