CN103001309A - Cold starting circuit of UPS (uninterrupted power supply) - Google Patents
Cold starting circuit of UPS (uninterrupted power supply) Download PDFInfo
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- CN103001309A CN103001309A CN2012104235238A CN201210423523A CN103001309A CN 103001309 A CN103001309 A CN 103001309A CN 2012104235238 A CN2012104235238 A CN 2012104235238A CN 201210423523 A CN201210423523 A CN 201210423523A CN 103001309 A CN103001309 A CN 103001309A
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Abstract
The invention relates to the technical field of cold starting of UPSs (uninterrupted power supplies), in particular to a cold starting circuit of a UPS. The cold starting circuit comprises a current-limiting resistor R and a contactor S, wherein the current-limiting resistor R is serially connected between a bus of the UPS to be started and batteries for supplying power for the bus, the contactor S is connected with the current-limiting resistor R in parallel, and driving voltage is supplied for a control coil of the contactor S by an output end of an inverter of the UPS. The cold starting circuit is simple, a boost-buck circuit or a control circuit is omitted, the control coil of the contactor is controlled smartly, fault points of the UPS are greatly reduced, the reliability of the UPS is improved, and the cost is effectively lowered.
Description
Technical field
The present invention relates to ups power cold start-up technical field, refer to especially a kind of ups power cold start-up circuit.
Background technology
At present, ups power generally all has cold start function, namely adopts under without the civil power input condition by battery to busbar charging to start UPS, particularly at power frequency UPS(uninterrupted power supply) in, because power ratio is larger, in order to increase work efficiency, generally adopts the cold start-up mode.The bus of power frequency UPS generally is connected to storage capacitor to play in the course of the work the effect of energy storage and filtering.The general capacitance of this electric capacity is larger, therefore if when starting UPS, directly input voltage is received on the bus then can be zero to produce huge impulse current owing to the initial voltage of electric capacity, not only may burn fuse and UPS quits work, even may damage UPS.The inverter of UPS need to just can have inversion output during up to certain value in busbar voltage again on the other hand, therefore before starting, UPS need special circuit to come lentamente to busbar charging, the voltage of bus and energy-storage battery is progressively raise, until be enough to drive inverter.
The operation principle of cold start-up such as Fig. 1, the current-limiting resistance R that connects between battery and bus gives current-limiting resistance R contactor S in parallel simultaneously.When just starting battery, contactor disconnects, and battery is given busbar charging lentamente by current-limiting resistance R, and closed contactor S directly is articulated on the bus battery with the short circuit current limitation resistance R when busbar voltage meets the demands.In this process, be the key of cold start-up success to the control of the contactor S control of contactor S control coil energising situation (namely to), at present, generally have following several to the control mode of contactor S:
The control coil power supply of (1) directly giving contactor S after power taking and the decompression from the bus makes contactor S realize conducting/disconnection according to busbar voltage.The method is owing to need to carry out the step-down processing to busbar voltage, and when busbar voltage was higher, reduction voltage circuit was very complicated, so the method scope of application is smaller, particularly was not suitable for the higher power frequency UPS of voltage ratio.
(2) control mode of employing software and combination of hardware.Namely utilize control chip that a suitable busbar voltage threshold value is set, detect simultaneously in real time busbar voltage and be delivered to control chip and the busbar voltage threshold ratio, when busbar voltage rose to the busbar voltage threshold value of setting, control chip was just sent out the adhesive that a control signal is come control contactor S.This a kind of method is many except control circuit, outside cost is higher, also because the operating voltage of the control coil of contactor S generally all is 220V or 110V, the control signal that control chip sends is control contactor S directly, and the centre must have the device of relay and so on or other circuit to be connected.Therefore, the whole control flow of this kind method is complicated, and useful life is disconnected, and cost is high.
(3) give separately contactor S configuration control power supply, rule of thumb by some pickup time that manually comes control contactor S, this kind method needs not only labor intensive, and the control time is inaccurate, and the control power supply of separately configuration will cause battery can't carry out cold start-up when breaking down.
Summary of the invention
The object of the invention is to avoid above-mentioned weak point of the prior art and provide a kind of circuit simple, the ups power cold start-up circuit that cost is low.
Purpose of the present invention is achieved through the following technical solutions:
A kind of ups power cold start-up circuit is provided, comprise current-limiting resistance R and contactor S, described current-limiting resistance R be series at UPS to be started bus and between the battery of bussed supply to form current-limiting charging circuit, described contactor S is in parallel with current-limiting resistance R, and the control coil of described contactor S obtains driving voltage from the output of the inverter of UPS.
Wherein, described contactor S is AC/DC type contactor S.
Wherein, described contactor S is SC-E5 type contactor S.
Wherein, described inverter is the inverter of three-phase output, wherein exporting mutually and be connected an of end of described contactor S control coil and inverter, and the other end is connected with ground wire.
Wherein, also comprise and the K switch of connecting to the battery of bussed supply.
Wherein, the wire diameter of the connecting line of the control coil of described contactor S and inverter is 1 mm-4mm.
Beneficial effect of the present invention: when UPS needed cold start-up, current-limiting resistance R was series between battery and the bus, and battery is progressively given busbar charging by current-limiting resistance R, avoided bus to produce impulse current.When busbar voltage reached required value, the inverter of UPS can output voltage, when reaching the operating voltage of control coil S of contactor to this output voltage, the contactor S conducting that just can be triggered, make current-limiting resistance by the R short circuit, battery directly is articulated on the bus, finishes cold start-up.The method circuit is simple, does not need to increase step-up/step-down circuit or control circuit, has realized dexterously the control to the contactor control coil, has greatly reduced the fault point of UPS, has improved the reliability of UPS, effectively reduces simultaneously cost.
Description of drawings
Fig. 1 is the circuit theory diagrams of ups power cold start-up.
Fig. 2 is the circuit diagram of a kind of ups power cold start-up of present embodiment circuit.
Embodiment
The invention will be further described with the following Examples.
The embodiment of a kind of ups power cold start-up of the present invention circuit 1, as shown in Figure 2, include: current-limiting resistance R and contactor S, described current-limiting resistance R be series at UPS to be started bus 2 and between the battery of bus 2 power supply to form current-limiting charging circuit, described contactor S is in parallel with current-limiting resistance R, and the control coil of described contactor S obtains driving voltage from the output of the inverter 3 of UPS.When UPS needed cold start-up, current-limiting resistance R connected and between battery and bus 2, battery progressively gives bus 2 chargings by current-limiting resistance R, avoids bus 2 to produce impulse currents.When bus 2 voltages reach required value, the inverter 3 meeting output voltages of UPS, the operating voltage that makes this output voltage reach the control coil S of contactor is, the contactor S conducting that just can be triggered, make current-limiting resistance R short circuit, battery directly is articulated on the bus 2, finishes cold start-up.The method circuit is simple, does not need to increase step-up/step-down circuit or control circuit, has realized dexterously the control to the contactor control coil, has greatly reduced the fault point of UPS, has improved the reliability of UPS, effectively reduces simultaneously cost.
Described contactor S is AC/DC type contactor S; Being specially described contactor S is SC-E5 type contactor S.Because the inversion of UPS is output as alternating current, therefore must to select operating voltage be the contactor S of alternating current to contactor S, simultaneously, because there is the zero passage phenomenon in alternating current, operating voltage is the phenomenon that may there be frequent adhesive in the contactor S of alternating current, therefore selects AC/DC type contactor S can satisfy the needs of this circuit.Select in the present embodiment SC-E5 type contactor S, certainly can select dissimilar contactors according to UPS concrete running parameter and environment.
Described inverter 3 is the inverter 3 of three-phase output, wherein exporting mutually and be connected of control coil one end of described contactor S and inverter 3, and the other end is connected with ground wire.For power frequency UPS, general inverter 3 is three-phase output, to this, only needs the phase power taking from the three-phase output of inverter 3 to get final product.
Cold start-up circuit 1 also comprises and the K switch of connecting to the battery of bus 2 power supplies.Described K switch is convenient to access and the disconnection of battery, and this external cold start-up can disconnect battery when accident occurring fast, protection UPS.
The wire diameter of the connecting line of the control coil of described contactor S and inverter 3 is 1 mm-4mm.Adopt the connecting line of this wire diameter can guarantee that enough conductances make control coil effectively from inverter 3 output power takings, improve this circuit reliability.
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although with reference to preferred embodiment the present invention has been done to explain; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.
Claims (6)
1. ups power cold start-up circuit, comprise current-limiting resistance R and contactor S, described current-limiting resistance R be series at UPS to be started bus and between the battery of bussed supply to form current-limiting charging circuit, described contactor S is in parallel with current-limiting resistance R, it is characterized in that: the control coil of described contactor S obtains driving voltage from the output of the inverter of UPS.
2. a kind of ups power cold start-up circuit as claimed in claim 1, it is characterized in that: described contactor S is AC/DC type contactor S.
3. a kind of ups power cold start-up circuit as claimed in claim 2, it is characterized in that: described contactor S is SC-E5 type contactor S.
4. a kind of ups power cold start-up circuit as claimed in claim 1 is characterized in that: described inverter is the inverter of three-phase output, wherein exporting mutually and be connected of control coil one end of described contactor S and inverter, and the other end is connected with ground wire.
5. a kind of ups power cold start-up circuit as claimed in claim 1 is characterized in that: also comprise and the K switch of connecting to the battery of bussed supply.
6. a kind of ups power cold start-up circuit as claimed in claim 1, it is characterized in that: the wire diameter of the control coil of described contactor S and the connecting line of inverter is 1 mm-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104235238A CN103001309A (en) | 2012-10-30 | 2012-10-30 | Cold starting circuit of UPS (uninterrupted power supply) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104235238A CN103001309A (en) | 2012-10-30 | 2012-10-30 | Cold starting circuit of UPS (uninterrupted power supply) |
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| Publication Number | Publication Date |
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| CN103001309A true CN103001309A (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104235238A Pending CN103001309A (en) | 2012-10-30 | 2012-10-30 | Cold starting circuit of UPS (uninterrupted power supply) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336814A (en) * | 2018-02-09 | 2018-07-27 | 漳州科华技术有限责任公司 | A kind of off-line UPS |
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| US20040090807A1 (en) * | 2002-11-08 | 2004-05-13 | Samsung Electronics Co., Ltd. | Motor power supply and method of controlling the same |
| CN201063534Y (en) * | 2007-08-09 | 2008-05-21 | 中国航天科工集团第三总体设计部 | Soft starting and commutation integrated device for switch power supply |
| CN201263093Y (en) * | 2008-09-10 | 2009-06-24 | 三科电器有限公司 | Bus-bar voltage soft actuating apparatus with uninterrupted power supply |
| CN101685975A (en) * | 2008-09-27 | 2010-03-31 | 力博特公司 | Method and device of soft start of bus voltage in uninterruptible power supply |
| CN102306938A (en) * | 2011-09-09 | 2012-01-04 | 北京索英电气技术有限公司 | Starting method for current transformer |
| CN202872450U (en) * | 2012-10-30 | 2013-04-10 | 广东易事特电源股份有限公司 | Cold boot circuit for UPS power supply |
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2012
- 2012-10-30 CN CN2012104235238A patent/CN103001309A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040090807A1 (en) * | 2002-11-08 | 2004-05-13 | Samsung Electronics Co., Ltd. | Motor power supply and method of controlling the same |
| CN201063534Y (en) * | 2007-08-09 | 2008-05-21 | 中国航天科工集团第三总体设计部 | Soft starting and commutation integrated device for switch power supply |
| CN201263093Y (en) * | 2008-09-10 | 2009-06-24 | 三科电器有限公司 | Bus-bar voltage soft actuating apparatus with uninterrupted power supply |
| CN101685975A (en) * | 2008-09-27 | 2010-03-31 | 力博特公司 | Method and device of soft start of bus voltage in uninterruptible power supply |
| CN102306938A (en) * | 2011-09-09 | 2012-01-04 | 北京索英电气技术有限公司 | Starting method for current transformer |
| CN202872450U (en) * | 2012-10-30 | 2013-04-10 | 广东易事特电源股份有限公司 | Cold boot circuit for UPS power supply |
Non-Patent Citations (1)
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| 刘永平: "GSC2-F系列交流接触器在直流负载上的应用", 《机床电器》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336814A (en) * | 2018-02-09 | 2018-07-27 | 漳州科华技术有限责任公司 | A kind of off-line UPS |
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Application publication date: 20130327 |