CN203368136U - AC/DC power supply non-delay switching system - Google Patents
AC/DC power supply non-delay switching system Download PDFInfo
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- CN203368136U CN203368136U CN2013204947586U CN201320494758U CN203368136U CN 203368136 U CN203368136 U CN 203368136U CN 2013204947586 U CN2013204947586 U CN 2013204947586U CN 201320494758 U CN201320494758 U CN 201320494758U CN 203368136 U CN203368136 U CN 203368136U
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- phase rectification
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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
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model relates to the technical field of power supply equipment and discloses an AC/DC power supply non-delay switching system. The system comprises: an AC input unit, a DC input unit and an output control unit. The AC input unit comprises an AC power supply and a single-phase rectifier bridge. The DC input unit comprises a storage battery group. The output control unit comprises a silicon controlled rectifier and a trigger circuit. The single-phase rectifier bridge is connected with the AC power supply and converts an alternating current into a pulsating direct current. The negative electrode of the storage battery group is connected with the output negative electrode of the single-phase rectifier bridge. The positive electrode of the storage battery group is connected with the positive electrode of the silicon controlled rectifier. The negative electrode of silicon controlled rectifier is connected with the output positive electrode of the single-phase rectifier bridge. The trigger circuit is connected between the positive electrode and the control electrode of the silicon controlled rectifier. According to the technical scheme of the utility model, fewer electronic components are utilized to finish main/standby switching, so that circuit structure is simplified, fault rate is reduced, system reliability is improved, meanwhile, non-delay switching in AC/DC power supply is achieved, and system safety performance is greatly improved.
Description
Technical field
The utility model relates to the power supply unit technical field, and particularly a kind of supplied by AC/DC electricity is without the time delay switched system.
Background technology
For important core power consumption equipment, back-up source is the significant components that guarantees device security stable operation.Such as the communication network node in core, for safety and the stability that guarantees whole communication network, need to when occurring, the emergency case such as outage connect standby power supply module, can continue normal operation until recover normal power supply to guarantee communication system.Generally, the core power consumption equipment mainly obtains electric power by mains-supplied, when civil power cuts off the power supply, adopt batteries in support power supply powered.Therefore because civil power is AC power, and batteries is DC power supply, also relates to the problem of alternating current-direct current switching in the main power supply power switching, and the reliability of commutation circuit is had to higher requirement.
In prior art, the middle low power backup power system adopts relay switch to be switched usually, although this mode equipment cost is low, circuit is easily realized, but with the relay of mechanical contact owing to being analog control mode, response speed is limited, usually be greater than 10 milliseconds switching time, can not meet the user demand of important events.In addition, the Combination application of semiconductor device and relay has also appearred in prior art, as disclosed (referring to Fig. 1) in Chinese patent open source literature CN102842950A, its alternating current-direct current diverter switch all adopts IGBT(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) 5, 6 (comprise relay coil 1 with relay, 3 and relay switch 2, 4) parallel connection, by the master control borad basis, the detection of voltage is controlled, although existing compound mode has solved the requirement of switching time, but its circuit complexity, equipment failure rate is high, cause maintenance greatly to increase, in addition, because the cyclic variation of alternating voltage own is larger, judge whether that AC dump need to wait for a period of time, can't realize real switching without time delay.
The utility model content
For the defect of prior art, technical problem to be solved in the utility model is how to realize supplied by AC/DC electricity switching easily.
For addressing the above problem, on the one hand, the utility model provides a kind of supplied by AC/DC electricity without the time delay switched system, and described system comprises AC input cell, continuous input cell and output control unit;
Described AC input cell comprises AC power and single-phase rectification bridge, and described continuous input cell comprises batteries, and described output control unit comprises controllable silicon and circuits for triggering; Wherein,
Described single-phase rectification bridge connects described AC power, converts alternating current to Rectified alternating current;
Described batteries negative pole is connected with described single-phase rectification bridge output negative pole, and described batteries is anodal to be connected with described controllable silicon anode;
Described controllable silicon negative electrode is connected with described single-phase rectification bridge output cathode, and described circuits for triggering are connected to described controllable silicon anode and control between the utmost point.
Preferably, described circuits for triggering comprise voltage stabilizing didoe.
Preferably, also comprise the current-limiting resistance of connecting with described voltage stabilizing didoe in described circuits for triggering.
Preferably, described single-phase rectification bridge is the semiconductor rectifier bridge.
Preferably, the conducting voltage of described voltage stabilizing didoe is greater than the difference of described batteries total voltage and described Rectified alternating current minimum voltage.
Electric current when preferably, described current-limiting resistance resistance value makes described voltage stabilizing didoe conducting is greater than the minimum current of the extremely reliable triggering and conducting of SCR control and is less than the maximum safe current of voltage-stabiliser tube work.
Preferably, described single-phase rectification bridge output cathode is connected load with output negative pole and is powered.
The technical solution of the utility model adopts a small amount of electronic component to complete the active and standby switching of power supply, preferentially adopts mains-supplied, than special-purpose electric power system, has saved the energy; Owing to having simplified circuit structure, reduced failure rate, improved the reliability of system, and reduced investment outlay, reduced running cost.Finally, by rational setting, the induction of system switching time of the present utility model accurately and timely, has realized switching without time delay of supplied by AC/DC electricity, has greatly promoted the system safety performance.
The accompanying drawing explanation
The electrical block diagram that Fig. 1 is supplied by AC/DC electricity switched system in prior art;
Fig. 2 be in preferred embodiment of the utility model supplied by AC/DC electricity without the electrical block diagram of time delay switched system;
Fig. 3 is that in an embodiment of the present utility model, supplied by AC/DC electricity changes the waveform schematic diagram without the operating voltage of time delay switched system.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, described embodiment is for implementing better embodiment of the present utility model, and described description is to illustrate that rule of the present utility model is purpose, not in order to limit scope of the present utility model.Protection range of the present utility model should with claim the person of being defined be as the criterion; embodiment based in the utility model; the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belong to the scope that the utility model is protected.
For the defect of prior art, a kind of new-type circuit is provided in the utility model, on the basis that promotes security performance, make circuit simple as far as possible, thereby further improve the reliability of electric power system, reduce maintenance and manufacturing cost.
As shown in Figure 2, in a preferred embodiment of the present utility model, supplied by AC/DC electricity comprises AC input cell, continuous input cell and output control unit without the time delay switched system; AC input cell comprises AC power 201 and single-phase rectification bridge 202, and continuous input cell comprises batteries 203, and output control unit comprises controllable silicon 204 and circuits for triggering; Wherein, single-phase rectification bridge 202 connects AC power 201, converts alternating current to Rectified alternating current; Batteries 203 negative poles are connected with single-phase rectification bridge 202 output negative poles, and batteries 203 is anodal to be connected with controllable silicon 204 anodes; Controllable silicon 204 negative electrodes are connected with single-phase rectification bridge 202 output cathodes, and circuits for triggering are connected to controllable silicon 204 anodes and control between the utmost point.Obviously easy insight, single-phase rectification bridge 202 output cathodes are connected load with output negative pole as output.
By the mode of Fig. 2, switched system of the present utility model, when the AC power normal power supply, bears by Rectified alternating current the task of powering to the load; When AC power is cut off the power supply, be switched to the direct current supply of batteries by the silicon controlled conducting.Because the silicon controlled control utmost point is connected with circuits for triggering, circuits for triggering only produce reaction to the abnormal change of Rectified alternating current, and be not subject to the impact of voltage in the Rectified alternating current normal fluctuation range, guaranteed that switched system can accurately judge the truth of alternating current outage and make in time response, has realized real switching without time delay.
In the preferred embodiment of Fig. 2, also comprise filter capacitor 207 in AC input cell, filter capacitor 207 and single-phase rectification bridge 202 parallel connections (being that filter capacitor 207 two-plates are connected respectively single-phase rectification bridge 202 output cathodes and output negative pole), carry out filtering to Rectified alternating current.Preferably, circuits for triggering comprise voltage stabilizing didoe 205, and the conducting of voltage stabilizing didoe 205 triggers the control utmost point of controllable silicon 204.More preferably, circuits for triggering also comprise the current-limiting resistance 206 of connecting with voltage stabilizing didoe 205, and the electric current while being used for to voltage stabilizing didoe 205 conducting is limited.
Below will change oscillogram further combined with the system voltage of Fig. 3 the course of work of the present utility model will be described.In Fig. 3, the T1 period is the AC power normal power supply, and single-phase rectification bridge just AC power (civil power is generally single-phase 50 weeks AC power) converts Rectified alternating current to.
The voltage of Rectified alternating current has fluctuation to a certain degree.Take civil power as example, and in Fig. 3, the maximum that Rectified alternating current maximum A point voltage is the 220V alternating voltage, be generally 311V, and pulsating direct current minimum value C point voltage, be not less than 240V usually; In the example of Fig. 3, continuous input cell is composed in series by lithium iron phosphate storage battery, and with monomer voltage, 3.2V/ only calculates, and adopts 80 joints to be composed in series, and batteries is generally static condition, and terminal voltage is the 256V left and right, B point in corresponding diagram 3.
During mains-supplied, when Rectified alternating current is pressed in curve A B section, the controllable silicon anode bears reverse voltage, and in blocking state, output current is all born by Rectified alternating current, and civil power powers to the load;
During mains-supplied, when Rectified alternating current is pressed in curve B C section, the controllable silicon anode bears forward voltage, but now the SCR control utmost point is in series with voltage stabilizing didoe, because the conducting voltage of voltage stabilizing didoe (being determined by device specification) is greater than BC section voltage, the conducting that can not be triggered of the SCR control utmost point, controllable silicon is still in blocking state, output current is still all born by Rectified alternating current, and civil power powers to the load;
The power down of T2 period mains-supplied, the pulsating dc voltage linear state descends, due to the oblique line section that exists the actual conditions possibility to mean as dotted line in Fig. 3 of filter capacitor.When voltage is dropped rapidly in figure the D point, the controllable silicon anode bears forward voltage, the conducting voltage of this voltage stabilizing didoe that the voltage at the voltage stabilizing didoe two ends of SCR control utmost point series connection has reached (or surpassing), the voltage stabilizing didoe conducting, the SCR control utmost point is triggered by forward, thereby make controlled silicon conducting, output current is all born by batteries, realized Alternating Current Power Supply switching without time delay to direct current supply.
Once the controllable silicon triggering and conducting, under the condition of anode forward voltage, as long as load current is greater than the controllable silicon extinction current, controllable silicon will remain conducting state, keep being powered to the load by backup batteries.
The T3 period, when mains-supplied is recovered, pulsating dc voltage rises very soon, in its voltage waveform occurs as Fig. 3 again, during the AB section, controllable silicon bears reverse voltage, and moment becomes blocking state again by conducting state, the direct current output of automatic cut-off batteries, output current is all born by pulsating direct current, returns to civil power and powers to the load, and has realized direct current supply switching without time delay to Alternating Current Power Supply.
Below in conjunction with a typical application scenarios, realization of the present utility model is described further.In this application scenarios, certain communications equipment room be take a frame as an electric power system, and frame load gross power is not more than 5KW, propose and put uninterrupted power supply, when civil power has electricity, civil power is preferentially powered, during the civil power power down, adopt the power supply of backup type lithium iron phosphate storage battery group, require to be less than switching time 1 millisecond.
System arranges substantially as shown in Figure 2, in AC input cell, selects a semiconductor rectifier bridge, its rated voltage to select to be greater than 600V, and rated current is not less than 40A; Consider the existing common already present capacitor of information technoloy equipment input circuit, the total capacity of the filter capacitor in AC input cell should be arranged so that the filter capacitor both end voltage is not less than in Fig. 3 the voltage that C is ordered (being the minimum voltage of Rectified alternating current).
Continuous input cell adopts 80 joints to be composed in series by the lithium iron phosphate storage battery group, standing voltage monomer 3.2V, and total voltage is 256V, the Capacity Selection of batteries is determined according to needing batteries to support duration after the civil power power down.
In output control unit, the controllable silicon rated voltage selects to be not less than 300V, and rated current selects to be not less than 50A.Circuit connects as shown in Figure 2, the selection of voltage stabilizing didoe rated voltage is with reference to magnitude of voltage that in figure 3, C point and D are ordered, and its conducting voltage (equaling BD two point voltage differences) should guarantee to be slightly larger than BC two point voltage differences, make like this voltage stabilizing didoe can not misleaded in Rectified alternating current normal voltage fluctuation range, once power down respond to rapidly conducting and trigger controllable silicon.The selection of current-limiting resistance takes into account the maximum safe current of voltage-stabiliser tube work and the minimum current of the extremely reliable triggering and conducting of SCR control.System work process as mentioned before, no longer is repeated in this description at this.
Compared with prior art, the technical solution of the utility model adopts a small amount of electronic component to complete the active and standby switching of power supply, preferentially adopts mains-supplied, than special-purpose electric power system, has saved the energy; Owing to having simplified circuit structure, reduced failure rate, improved the reliability of system, and reduced investment outlay, reduced running cost.Finally, by rational setting, the induction of system switching time of the present utility model accurately and timely, has realized switching without time delay of supplied by AC/DC electricity, has greatly promoted the system safety performance.
Although below in conjunction with the preferred embodiments the utility model is described, but it should be appreciated by those skilled in the art, method and system described in the utility model is not limited to the embodiment described in embodiment, in the situation that do not deviate from the utility model spirit and scope that limited by appended claims, can make various modifications, increase and replace the utility model.
Claims (7)
1. a supplied by AC/DC electricity, without the time delay switched system, is characterized in that, described system comprises:
AC input cell, continuous input cell and output control unit;
Described AC input cell comprises AC power and single-phase rectification bridge, and described continuous input cell comprises batteries, and described output control unit comprises controllable silicon and circuits for triggering; Wherein,
Described single-phase rectification bridge connects described AC power, converts alternating current to Rectified alternating current;
Described batteries negative pole is connected with described single-phase rectification bridge output negative pole, and described batteries is anodal to be connected with described controllable silicon anode;
Described controllable silicon negative electrode is connected with described single-phase rectification bridge output cathode, and described circuits for triggering are connected to described controllable silicon anode and control between the utmost point.
2. system according to claim 1, is characterized in that, described circuits for triggering comprise voltage stabilizing didoe.
3. system according to claim 2, is characterized in that, also comprises the current-limiting resistance of connecting with described voltage stabilizing didoe in described circuits for triggering.
4. system according to claim 1, is characterized in that, described single-phase rectification bridge is the semiconductor rectifier bridge.
5. system according to claim 2, is characterized in that, the conducting voltage of described voltage stabilizing didoe is greater than the difference of described batteries total voltage and described Rectified alternating current minimum voltage.
6. system according to claim 3, is characterized in that, electric current when described current-limiting resistance resistance value makes described voltage stabilizing didoe conducting is greater than the minimum current of the extremely reliable triggering and conducting of SCR control and is less than the maximum safe current of voltage-stabiliser tube work.
7. system according to claim 1, is characterized in that, described single-phase rectification bridge output cathode is connected load with output negative pole and is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204947586U CN203368136U (en) | 2013-08-14 | 2013-08-14 | AC/DC power supply non-delay switching system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013204947586U CN203368136U (en) | 2013-08-14 | 2013-08-14 | AC/DC power supply non-delay switching system |
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| Publication Number | Publication Date |
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| CN203368136U true CN203368136U (en) | 2013-12-25 |
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| CN2013204947586U Withdrawn - After Issue CN203368136U (en) | 2013-08-14 | 2013-08-14 | AC/DC power supply non-delay switching system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401306A (en) * | 2013-08-14 | 2013-11-20 | 北京时空科技有限公司 | AC/DC power supply nondelay switching system |
| CN104810496A (en) * | 2014-01-23 | 2015-07-29 | 广西电网公司百色供电局 | Two-way crossover circuit |
-
2013
- 2013-08-14 CN CN2013204947586U patent/CN203368136U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401306A (en) * | 2013-08-14 | 2013-11-20 | 北京时空科技有限公司 | AC/DC power supply nondelay switching system |
| CN103401306B (en) * | 2013-08-14 | 2016-03-09 | 北京时空科技有限公司 | Supplied by AC/DC electricity is without time delay switched system |
| CN104810496A (en) * | 2014-01-23 | 2015-07-29 | 广西电网公司百色供电局 | Two-way crossover circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20160309 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |