CN202872450U - Cold boot circuit for UPS power supply - Google Patents
Cold boot circuit for UPS power supply Download PDFInfo
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- CN202872450U CN202872450U CN 201220562544 CN201220562544U CN202872450U CN 202872450 U CN202872450 U CN 202872450U CN 201220562544 CN201220562544 CN 201220562544 CN 201220562544 U CN201220562544 U CN 201220562544U CN 202872450 U CN202872450 U CN 202872450U
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- contactor
- ups
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- inverter
- cold start
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Abstract
The utility model relates to a cold boot circuit for a UPS power supply, comprising a current limiting resistor R and a contactor S, wherein the current limiting resistor R is connected between the bus of a UPS to be started and a battery for supplying electric power to the bus in series, the contactor S and the current limiting resistor R are connected in parallel, and the control coil of the contactor S obtains a driving voltage from the output end of the inverter of the UPS. The cold boot circuit for a UPS power supply is simple, and dispenses with adding a step-up or step-down circuit or a control circuit, thereby ingeniously realizing the control of the control coil of the contactor, greatly reducing the fault points of the UPS, increasing the reliability of the UPS, and simultaneously and effectively reducing the cost.
Description
Technical field
The utility model relates to ups power cold start-up technical field, refers 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 purpose of this utility model is to avoid above-mentioned weak point of the prior art and provides a kind of circuit simple, the ups power cold start-up circuit that cost is low.
The purpose of this utility model 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.
The beneficial effects of the utility model: 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 the present embodiment circuit.
Embodiment
With the following Examples the utility model is further described.
The embodiment of a kind of ups power cold start-up of the utility model 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 contactor 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 the technical solution of the utility model; but not to the restriction of the utility model protection range; although with reference to preferred embodiment the utility model 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 the technical solution of the utility model, and not break away from essence and the scope of technical solutions of the utility model.
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 |
|---|---|---|---|
| CN 201220562544 CN202872450U (en) | 2012-10-30 | 2012-10-30 | Cold boot circuit for UPS power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220562544 CN202872450U (en) | 2012-10-30 | 2012-10-30 | Cold boot circuit for UPS power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872450U true CN202872450U (en) | 2013-04-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220562544 Expired - Lifetime CN202872450U (en) | 2012-10-30 | 2012-10-30 | Cold boot circuit for UPS power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202872450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001309A (en) * | 2012-10-30 | 2013-03-27 | 广东易事特电源股份有限公司 | Cold starting circuit of UPS (uninterrupted power supply) |
-
2012
- 2012-10-30 CN CN 201220562544 patent/CN202872450U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001309A (en) * | 2012-10-30 | 2013-03-27 | 广东易事特电源股份有限公司 | Cold starting circuit of UPS (uninterrupted power supply) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
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| CX01 | Expiry of patent term |