CN1344053A - Method and device for switching one from multiple AC circuits - Google Patents
Method and device for switching one from multiple AC circuits Download PDFInfo
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- CN1344053A CN1344053A CN 01133325 CN01133325A CN1344053A CN 1344053 A CN1344053 A CN 1344053A CN 01133325 CN01133325 CN 01133325 CN 01133325 A CN01133325 A CN 01133325A CN 1344053 A CN1344053 A CN 1344053A
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Abstract
A method and device for switching one of multiple AC lines to user equipment is disclosed. The pulse generator is controlled by monitoring the AC conditions at output. According to the signals of pulse generator, the counting ports of a counter can be used to control which line of multiple AC lines is output. It can be used for cable TV network, closed-loop TV, and power supply for higher reliability.
Description
1. the technical field that the present invention relates to
The present invention relates to a kind of handoff technique of alternating current, exactly be a kind of method and device that No. one alternating current that from multiple AC, switch, a loop power supply as from three-phase alternating current, switching cross streams electricity and from the double circuit power supply system, switch.
2. background technology situation of the present invention is proposed
Active equipments such as the optical node in existing cable TV network, amplifier often all are power takings on the spot nearby.Because of the network failure that causes of power supply reason accounts for the significant proportion of whole Wired TV network fault rate, this type of fault often causes large-area subscriber signal to interrupt simultaneously, and is bigger to the service impact of cable TV station.Active equipment in the cable TV network all is single phase alternating current (A.C.) or converts the 60V Alternating Current Power Supply to by single phase alternating current (A.C.), so this kind equipment can only be got one and powers mutually from three-phase alternating current.Because the reliability of electrical network is not high, often causes faults such as phase shortage because of a variety of causes.If happen that cross streams electricity of being got goes wrong, then the equipment in the cable TV network just can't operate as normal.
In TV station and cable TV station machine room inside, for guaranteeing the work of playing device, adopt the double circuit power supply mode, and two circuit switching mode majority is manual switching more.It is major loop that the automatic switching control equipment that the minority machine room adopts is often set a loop, another road is auxilliary loop, switches to auxilliary loop when major loop has a power failure, and switch back major loop again when main circuit power supply recovers, so not only will carry out twice switching, and the cost of this equipment is also higher.
A kind of method and device that from multiple AC, automaticallyes switch and No. one alternating current of special for this reason proposition.
3. particular content of the present invention
The purpose of this invention is to provide a kind of method and device that automaticallyes switch from multiple AC and No. one alternating current, it can be as long as any cross streams electricity normally just can provide electric energy for single-phase electric devices under the environment that three-phase alternating current can be provided; In the occasion of double circuit power supply, can when cutting off the power supply, current current supply circuit switch to another loop, have only when another loop cuts off the power supply, just to switch to original loop.The present invention has realized the automatic switchover of multiple AC at low cost under the situation that guarantees reliability, thereby the fault that causes because of external world's power supply reason is reduced greatly, will improve the reliability of equipment operation greatly like this.
The provided by the invention switching from multiple AC one tunnel method and is:
The operating state of coming the control impuls generator by the situation that detects the output alternating current, the signal of pulse generator outputs to counting device, counting device decides the state of different counting ports according to this signal, and come the drive circuit of each road input AC electricity of control connection to the alternating-current switch of output by the state of difference counting port, when the output alternating current is unusual, counting device changes to determine that according to the signal of pulse generator one of them counting port is effective, drive circuit makes corresponding alternating-current switch conducting according to the state of this port, thereby that road alternating current that this alternating-current switch is connected switches to output, the signal that this moment, detector detected the normal back of the alternating current control impuls generator of output correspondingly changes, counting device then keeps the state of this counting port so that this road alternating current continues to output to output, when this road alternating current is unusual, begin said process again, till finding one tunnel effective alternating current output.
Provided by the inventionly be used for implementing the device that above-mentioned switching one tunnel method be from multiple AC:
Multiple AC input and No. one alternating current output are set, between each road alternating current input and alternating current output, alternating-current switch are set, control circuit is set connects output and alternating-current switch;
Described control circuit is made up of supply convertor, detector, pulse generator, counting device, drive circuit:
Described supply convertor extracts working power for control circuit from each road alternating current;
Described detector detects the situation of the alternating current of output;
Described pulse generator is determined operating state according to the normal or unusual situation of the detected output alternating current of detector;
Described counting device is determined the state of each terminal count output mouth by the signal of received pulse generator;
Described terminal count output mouth connects each drive circuit respectively, and described drive circuit connects each alternating-current switch respectively.
Above-mentioned supply convertor is made of transformer, rectifier bridge, filter capacitor and regulator block etc.
Above-mentioned detector is made of voltage detector.
Above-mentioned pulse generator is made of oscillator.
The said counting device is made of counter.
Above-mentioned drive unit is made of triode and subsidiary component.
Above-mentioned alternating-current switch is made of relay and subsidiary component.
That utilizes that method provided by the invention and device finish switches the technology that No. one alternating current from multiple AC, compare with existing similar technology and to have following advantage: because that the device of this method of enforcement has is simple in structure, easily manufactured, volume is little, characteristics such as in light weight, durable in use, the fault that causes because of external world's power supply reason is reduced greatly, also can improve the reliability of equipment operation greatly, this just provides wide prospect for its application.
4. implement legend of the present invention and explanation
Fig. 1 is for implementing the system construction drawing of device of the present invention;
Fig. 2 is for implementing the manipulated or operated apparatus that a phase of switching of the present invention from three-phase alternating current;
Fig. 3 one tunnel manipulated or operated apparatus for implement of the present invention the switching from double circuit power supply.
As shown in Figure 1, the provided by the invention switching from multiple AC one tunnel device and mainly is made of multiple AC input, alternating-current switch, alternating current output and control circuit, and control circuit is made of supply convertor, detector, pulse generator, counting device and drive circuit.Now its structure is described in detail as follows:
Incoming transport switch between multiple AC input and alternating current output, and control circuit links to each other with alternating current output and alternating-current switch respectively.Control circuit detects the situation of output alternating current, and determines to make which alternating current to output to output.
Supply convertor other circuit for control circuit from the alternating current of input provides working power.
Detector connects the alternating current output, and it detects output termination pulse generator.
The input of the output termination counting device of pulse generator, it changes the output signal of self according to the signal of detector.
Counting device changes to determine the state of self each terminal count output mouth according to the signal of pulse generator, and each terminal count output mouth connects the drive circuit of each alternating-current switch respectively, and drive circuit connects each alternating-current switch respectively.
Now the course of work with this device is described below:
Detector is by detecting the operating state that output alternating current situation is come the control impuls generator, the signal of pulse generator outputs to counting device, counting device decides the state of different counting ports according to the signal of pulse generator, and come the drive circuit of each road input AC electricity of control connection to the alternating-current switch of output by the state of difference counting port, when one of them counting port is effective, the drive circuit of this port correspondence is started working, the alternating-current switch conducting that this moment is corresponding, thereby that road alternating current that this alternating-current switch is connected switches to output, the signal that this moment, detector detected the normal back of the alternating current control impuls generator of output changes, thereby make counting device keep the state of this counting port so that this road alternating current continues to output to output, when this road alternating current is unusual, begin said process again, till finding one tunnel effective alternating current output.
As shown in Figure 2, it is as follows to switch the circuit brief introduction of the device that a phase from three-phase alternating current:
No. three transformer decompression rectifier filter circuits among the figure are given U3 voltage stabilizing output after three diodes converge, thereby the voltage of this circuit working is provided; The alternating current output is sent into light-emitting diode one side of optocoupler U4 (4N25), photistor one side joint U1 (555) oscillator of U4 after R1 introduces the pressure limiting of rectifier bridge rectifying and wave-filtering; U1 starting oscillation when the light-emitting diode of U4 is lighted, U1 failure of oscillation when extinguishing; The oscillator signal of U1 is sent into the input end of clock of decade counter U2 (4017), and it is high level that U2 makes its ten terminal count outputs successively according to the signal of input; The Q2 of U2, Q5, Q8 pin connect No. three drive circuits that BG1-BG6, BG2-BG4, BG3-BG5 and accessory circuit are separately formed respectively, and it is the fail safe of asking when guaranteeing that alternating current switches that the terminal count output of U2 is selected in the compartment of terrain; No. three drive circuits make corresponding C N1, CN2, three relay work of CN3 respectively; U5A, U5B, U5C three tunnel amplifiers and interlock circuit are formed three-phase input AC electricity superpressure detector, when which cross streams electricity superpressure, corresponding amplifier is output output high level relatively, and the corresponding driving circuit can't be worked, thereby that cross streams electricity that guarantees superpressure can not be received output; YM1, YM2, YM3 are three piezo-resistances, play the superhigh pressure protective effect.
The operation principle of Fig. 2 is as follows:
Optocoupler U4 (4N25) detects on the alternating current output L whether alternating current is arranged, if not then to make 4 pin of U1 (555) be high level, the U1 starting of oscillation, the vibration square wave adds the CLK end of U2 (4017), U2 begins counting, making output successively from Q0 is high level, when the Q2 end is high level, triode BG3 conducting, thus make relay CN3 adhesive, thus the alternating current of alternating current input C is switched on the alternating current output L, this moment, U4 detected that to make 4 pin of U1 (555) behind the alternating current on the L be low level, U1 failure of oscillation, U2 keep the Q2 end to be high level always, thereby make the alternating current of C end keep outputing to the L end.When if Q2 is high level, the L end does not still have alternating current, and U2 continues to count down in succession Q5, Q8 end, makes B, A end insert the L end successively through switching circuit, till finding one tunnel effective alternating current output.
As shown in Figure 3, it is as follows to switch the circuit brief introduction that one tunnel device from double circuit power supply:
Fig. 3 is similar to the operation principle of Fig. 2, just switches three-phase alternating current simultaneously, selects the relay with three tunnel outputs here for use.In this figure, adopt two interphase transformers (380V) from two current supply circuits, to extract electric energy respectively.Being detector---the voltage that the light-emitting diode of optocoupler provides also is to extract between the two-phase of output alternating current.
Above-mentioned implementation method of the present invention is not unique, and multiple mode can also be arranged, for example: the first, described supply convertor can be made of step-down rectifying circuits such as electric capacity, resistance; The second, described detector can be made of current detector; The 3rd, described pulse generator can be made of the ac power waveform extraction element; The 4th, described counting device can be made of microprocessor; The 5th, described drive unit can be made of circuit such as photoelectricity drivings; The 6th, described alternating-current switch can be made of controllable silicon and subsidiary component.5. the specific embodiment of the present invention
The present invention can be widely used in the occasion of decentralized power supply, as monitoring point of the monitoring point of the monitoring point of the cable TV network of power taking, gaspipe network, closed-circuit television, guard and alarm etc. on the spot nearby.It can substitute the ups power that costs an arm and a leg, also will often safeguard in a lot of occasions.
The present invention can be used as a standarized component and is applied in the existing various power-supply device, as the centrally connected power supply device of wired TV network, the ups power of communication equipment etc., can improve the cost performance of this kind equipment greatly.
The present invention also can be applicable to broadcast, in the machine room of TV, telecommunications, can reduce making the fault that causes because of external world's power supply reason greatly, thereby improve the reliability of equipment operation.
Claims (8)
1. from multiple AC, switch and one tunnel method and be:
The operating state of coming the control impuls generator by the situation that detects the output alternating current, the signal of pulse generator outputs to counting device, counting device decides the state of different counting ports according to this signal, and come the drive circuit of each road input AC electricity of control connection to the alternating-current switch of output by the state of difference counting port, when the output alternating current is unusual, counting device changes to determine that according to the signal of pulse generator one of them counting port is effective, drive circuit makes corresponding alternating-current switch conducting according to the state of this port, thereby that road alternating current that this alternating-current switch is connected switches to output, the signal that this moment, detector detected the normal back of the alternating current control impuls generator of output correspondingly changes, counting device then keeps the state of this counting port so that this road alternating current continues to output to output, when this road alternating current is unusual, begin said process again, till finding one tunnel effective alternating current output.
2. realize the device of the described method of claim 1, it is characterized in that:
Multiple AC input and No. one alternating current output are set, between each road alternating current input and alternating current output, alternating-current switch are set, control circuit is set connects output and alternating-current switch;
Described control circuit is made up of supply convertor, detector, pulse generator, counting device, drive circuit;
Described supply convertor extracts working power for control circuit from each road alternating current;
Described detector detects the situation of the alternating current of output;
Described pulse generator is determined operating state according to the normal or unusual situation of the detected output alternating current of detector;
Described counting device is determined the state of each terminal count output mouth by the signal of received pulse generator;
Described terminal count output mouth connects each drive circuit respectively, and described drive circuit connects each alternating-current switch respectively.
3. device according to claim 2 is characterized in that described supply convertor is made of transformer, rectifier bridge, filter capacitor and regulator block etc.
4. device according to claim 2 is characterized in that described detector is made of voltage detector.
5. device according to claim 2 is characterized in that described pulse generator is made of oscillator.
6. device according to claim 2 is characterized in that described counting device is made of counter.
7. device according to claim 2 is characterized in that described drive unit is made of triode and subsidiary component.
8. device according to claim 2 is characterized in that described alternating-current switch is made of relay and subsidiary component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01133325 CN1344053A (en) | 2001-10-22 | 2001-10-22 | Method and device for switching one from multiple AC circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01133325 CN1344053A (en) | 2001-10-22 | 2001-10-22 | Method and device for switching one from multiple AC circuits |
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| CN1344053A true CN1344053A (en) | 2002-04-10 |
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| CN 01133325 Pending CN1344053A (en) | 2001-10-22 | 2001-10-22 | Method and device for switching one from multiple AC circuits |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377808A (en) * | 2014-11-14 | 2015-02-25 | 浪潮(北京)电子信息产业有限公司 | General multi-channel power supply device |
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2001
- 2001-10-22 CN CN 01133325 patent/CN1344053A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377808A (en) * | 2014-11-14 | 2015-02-25 | 浪潮(北京)电子信息产业有限公司 | General multi-channel power supply device |
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