CN104167724A - Isolating-type bidirectional communication signal lighting protection device - Google Patents
Isolating-type bidirectional communication signal lighting protection device Download PDFInfo
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- CN104167724A CN104167724A CN201410454198.0A CN201410454198A CN104167724A CN 104167724 A CN104167724 A CN 104167724A CN 201410454198 A CN201410454198 A CN 201410454198A CN 104167724 A CN104167724 A CN 104167724A
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Abstract
The invention relates to the technical field of lighting protection devices, and discloses an isolating-type bidirectional communication signal lighting protection device. The isolating-type bidirectional communication signal lighting protection device comprises a lighting protection circuit, an active isolating circuit and a power supply circuit. The lighting protection circuit comprises a first gas discharge tube GDT1, a second gas discharge tube GDT2, high-speed rectifier tubes D3, a transient voltage suppressor TVS and a current-limiting resistor R1. All signals are connected with the isolating input end reference ground GND2 through the first gas discharge tube GDT1 and the transient voltage suppressor TVS respectively and connected with the lighting protection ground through the second gas discharge tube GDT2, the current-limiting resistor R1 is connected between the first gas discharge tube GDT1 and the transient voltage suppressor TVS in series, and the high-speed rectifier tubes D3 are connected with the first gas discharge tube GDT1 in a star-shaped mode. The active isolating circuit comprises magnetic coupling signal transceiver U1, a signal transceiver U2 and monostable triggers U3. According to the isolating-type bidirectional communication signal lighting protection device, several-ten-of-thousand-of-volt lightning induction is reduced to hundred-of-volt pulse voltage through the lighting protection circuit, the hundred-of-volt pulse voltage is then reduced to power supply voltage through the active isolating circuit, and therefore residual voltage of the product is minimized.
Description
Technical field
The present invention relates to lightning protection device technical field, more particularly, particularly a kind of isolation type bidirectional signal of communication lightning protection device.
Background technology
Existing shocking preventing technology be all by non-linear element, the voltage difference between each line is limited in to certain level within, but because all elements all have certain operate time, when lightning induction arrives, between each line of lightning protection device, still can form a pulse voltage with very high voltage cannot eliminate; Finally cause product protection failure.Therefore the lightning protection device that, is necessary to design a kind of new structure is to solve problems of the prior art.
Summary of the invention
The object of the present invention is to provide a kind of isolation type bidirectional signal of communication lightning protection device of eliminating pulse voltage.
In order to solve problem set forth above, the technical solution used in the present invention is: a kind of isolation type bidirectional signal of communication lightning protection device, and it comprises lightning protection circuit, the active buffer circuit being connected with lightning protection circuit and the power supply circuits that are connected with active buffer circuit; Wherein, described lightning protection circuit comprises the first and second gas discharge tube GDT1, GDT2, high speed rectifying tube D3, Transient Suppression Diode TVS and current-limiting resistance R1, each signal connects Isolation input end by the first gas discharge tube GDT1 and Transient Suppression Diode TVS respectively and connects lightning proof ground with reference to ground GND2 and by the second gas discharge tube GDT2, described current-limiting resistance R1 is connected in series between the first gas discharge tube GDT1 and Transient Suppression Diode TVS, and described high speed rectifying tube D3 is star-like with the first gas discharge tube GDT1 and is connected; Described active buffer circuit comprises magnetic coupling signal transceiver U1, signal transceiver U2, and is connected to the monostable flipflop U3 between magnetic coupling signal transceiver U1 and signal transceiver U2.
According to a preferred embodiment of the invention: described monostable flipflop U3 is two, be all connected between magnetic coupling signal transceiver U1 and signal transceiver U2.
According to a preferred embodiment of the invention: described power supply circuits comprise transformer T and the DC converting circuit connecting successively, described DC converting circuit comprises rectifier bridge D1, filter capacitor C3 and voltage-stabiliser tube D2, described transformer output is connected with rectifier bridge D1, and described filter capacitor C3 and voltage-stabiliser tube D2 are parallel to the output of rectifier bridge D1.
According to a preferred embodiment of the invention: described DC converting circuit is two groups, wherein the output of one group of DC converting circuit is connected with magnetic coupling signal transceiver U1, monostable flipflop U3, and wherein the output of another group DC converting circuit is connected with signal transceiver U2.
According to a preferred embodiment of the invention: described magnetic coupling signal transceiver U1 the 6th pin, the 7th pin, and the 12 pin of signal transceiver U2 and the 13 pin are all connected to the two ends of a resistance R 3 by a resistance R 2.
Compared with prior art, beneficial effect of the present invention is: the present invention is reduced to the lightning induction of tens thousand of volts the pulse voltage of hundreds of volts by the lightning protection circuit of front end, magnetic coupling transceiver by active buffer circuit is reduced to power supply voltage by the pulse voltage of hundreds of volts again, thereby the residual voltage that makes product reaches minimum, inside adopts not parallel wiring rule simultaneously, allow parasitic capacitance between line reduce, thereby improve data-signal transmission performance.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit diagram of isolation type bidirectional signal of communication lightning protection device of the present invention.
Fig. 2 is the circuit diagram of lightning protection circuit in isolation type bidirectional signal of communication lightning protection device of the present invention.
Fig. 3 is the circuit diagram of active buffer circuit in isolation type bidirectional signal of communication lightning protection device of the present invention.
Fig. 4 is the circuit diagram of power supply circuits in isolation type bidirectional signal of communication lightning protection device of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention are made to more explicit defining.
Consult shown in Fig. 1, a kind of isolation type bidirectional signal of communication lightning protection device provided by the invention, it comprises lightning protection circuit, the active buffer circuit being connected with lightning protection circuit and the power supply circuits that are connected with active buffer circuit.
Consult shown in Fig. 2, lightning protection circuit of the present invention comprises the first and second gas discharge tube GDT1, GDT2, high speed rectifying tube D3, Transient Suppression Diode TVS and current-limiting resistance R1, each signal connects Isolation input end by the first gas discharge tube GDT1 and Transient Suppression Diode TVS respectively and connects lightning proof ground with reference to ground GND2 and by the second gas discharge tube GDT2, described current-limiting resistance R1 is connected in series between the first gas discharge tube GDT1 and Transient Suppression Diode TVS, and described high speed rectifying tube D3 is star-like with the first gas discharge tube GDT1 and is connected.
The operation principle of described lightning protection circuit is: work as lightning current, when lightning voltage passes through lightning protection device of the present invention, lightning protection device is protected follow-up equipment by the mode of earial drainage pressure limiting, first the Transient Suppression Diode TVS by fast response time moves, cause current-limiting resistance R1 two ends to have voltage, at this moment the voltage at gas discharge tube two ends is the voltage sum at current-limiting resistance R1 and Transient Suppression Diode TVS two ends, configure corresponding components and parts, make gas discharge tube reach puncture voltage, large electric current is discharged from the first gas discharge tube GDT1, by Transient Suppression Diode, TVS carries out deboost, thereby protection equipment, the full-bridge rectification of the rectifying tube design in circuit, main purpose is to play to reduce the effect that parasitic capacitance is connected with conducting line line.
Consult shown in Fig. 3, active buffer circuit described in the present invention comprises magnetic coupling signal transceiver U1, signal transceiver U2, and be connected to the monostable flipflop U3 between magnetic coupling signal transceiver U1 and signal transceiver U2, wherein, monostable flipflop U3 is two, all be connected between magnetic coupling signal transceiver U1 and signal transceiver U2, at magnetic coupling signal transceiver U1 the 6th pin, the 7th pin, and the 12 pin of signal transceiver U2 and the 13 pin are all connected to the two ends of a resistance R 3 by a resistance R 2.
The operation principle of described active buffer circuit is: the high-voltage pulse that two-way communication signal partly fails lightning protection circuit to eliminate by magnetic coupling signal transceiver U1 is isolated, the voltage peak of magnetic coupling signal transceiver U1 output is determined by the supply voltage of power supply circuits, and two-way communication signal is converted to the unidirectional receiving and transmitting signal of controlling, unidirectional receiving and transmitting signal is converted to two-way communication signal through signal transceiver U2 again and exports, between two transceivers, receive and send out and control by two monostable flipflop U3, and resistance R 2 in periphery support circuit is for preventing transceiver puncture short, resistance R 3 is terminal build-out resistor, resistance R 4 is the pull-up resistor of U1 chip PV pin, capacitor C 1 is decoupling capacitor, resistance R 5 is for determining the A pin input state of monostable flipflop U3, resistance R 6 forms RC circuit for the transmission rate of regulating circuit with capacitor C 2.
Consult shown in Fig. 4, power supply circuits described in the present invention comprise transformer T and the DC converting circuit connecting successively, described DC converting circuit comprises rectifier bridge D1, filter capacitor C3 and voltage-stabiliser tube D2, described transformer output is connected with rectifier bridge D1, and described filter capacitor C3 and voltage-stabiliser tube D2 are parallel to the output of rectifier bridge D1.
As preferably, described DC converting circuit is two groups, and wherein the output of one group of DC converting circuit is connected with magnetic coupling signal transceiver U1, monostable flipflop U3, and wherein output of another group DC converting circuit is connected with signal transceiver U2.
The operation principle of described power supply circuits is: 220V alternating current is converted to two groups of low-voltage AC electricity of mutually isolating through transformer T, these two groups of alternating currents are respectively by rectifier bridge D1 rectification, by filter capacitor C3, by unsteady voltage transitions, be direct current, and determine galvanic output voltage values by voltage-stabiliser tube D2.Two groups of input, output and other circuit that independently direct current is magnetic coupling signal transceiver U1 of final output provide isolated DC power supply.
The present invention is because the lightning protection circuit by front end is reduced to the lightning induction of tens thousand of volts the pulse voltage of hundreds of volts, magnetic coupling transceiver by active buffer circuit is reduced to power supply voltage by the pulse voltage of hundreds of volts again, thereby the residual voltage that makes product reaches minimum, inside adopts not parallel wiring rule simultaneously, allow parasitic capacitance between line reduce, thereby improve data-signal transmission performance.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (5)
1. an isolation type bidirectional signal of communication lightning protection device, is characterized in that: comprise lightning protection circuit, the active buffer circuit being connected with lightning protection circuit and the power supply circuits that are connected with active buffer circuit; Wherein, described lightning protection circuit comprises the first and second gas discharge tube GDT1, GDT2, high speed rectifying tube D3, Transient Suppression Diode TVS and current-limiting resistance R1, each signal connects Isolation input end by the first gas discharge tube GDT1 and Transient Suppression Diode TVS respectively and connects lightning proof ground with reference to ground GND2 and by the second gas discharge tube GDT2, described current-limiting resistance R1 is connected in series between the first gas discharge tube GDT1 and Transient Suppression Diode TVS, and described high speed rectifying tube D3 is star-like with the first gas discharge tube GDT1 and is connected; Described active buffer circuit comprises magnetic coupling signal transceiver U1, signal transceiver U2, and is connected to the monostable flipflop U3 between magnetic coupling signal transceiver U1 and signal transceiver U2.
2. isolation type bidirectional signal of communication lightning protection device according to claim 1, is characterized in that: described monostable flipflop U3 is two, is all connected between magnetic coupling signal transceiver U1 and signal transceiver U2.
3. isolation type bidirectional signal of communication lightning protection device according to claim 1, it is characterized in that: described power supply circuits comprise transformer T and the DC converting circuit connecting successively, described DC converting circuit comprises rectifier bridge D1, filter capacitor C3 and voltage-stabiliser tube D2, described transformer output is connected with rectifier bridge D1, and described filter capacitor C3 and voltage-stabiliser tube D2 are parallel to the output of rectifier bridge D1.
4. isolation type bidirectional signal of communication lightning protection device according to claim 3, it is characterized in that: described DC converting circuit is two groups, wherein the output of one group of DC converting circuit is connected with magnetic coupling signal transceiver U1, monostable flipflop U3, and wherein the output of another group DC converting circuit is connected with signal transceiver U2.
5. isolation type bidirectional signal of communication lightning protection device according to claim 1, it is characterized in that: described magnetic coupling signal transceiver U1 the 6th pin, the 7th pin, and the 12 pin of signal transceiver U2 and the 13 pin are all connected to the two ends of a resistance R 3 by a resistance R 2.
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| CN201410454198.0A CN104167724B (en) | 2014-09-08 | 2014-09-08 | A kind of isolation type bidirectional signal of communication lightning protection device |
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| CN201410454198.0A CN104167724B (en) | 2014-09-08 | 2014-09-08 | A kind of isolation type bidirectional signal of communication lightning protection device |
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| CN104167724B CN104167724B (en) | 2017-06-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932069A (en) * | 2016-05-12 | 2016-09-07 | 上海芯石微电子有限公司 | Low-capacitance low-voltage TVS device optimizing structure and manufacturing process, and manufacturing method for low-capacitance low-voltage TVS device |
| CN108169548A (en) * | 2018-01-29 | 2018-06-15 | 西安神电电器有限公司 | A kind of arrester on-Line Monitor Device |
| CN109390887A (en) * | 2017-08-14 | 2019-02-26 | 深圳康普盾科技股份有限公司 | A kind of combined connection box having lightning protection function |
| CN110954739A (en) * | 2019-11-19 | 2020-04-03 | 上海沪臻智能科技有限公司 | AC voltage zero-crossing trigger detection circuit |
| CN117913759A (en) * | 2024-01-29 | 2024-04-19 | 广拓太阳能发电共和有限公司 | Wind power lightning protection system based on multi-pulse surge protector |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932069A (en) * | 2016-05-12 | 2016-09-07 | 上海芯石微电子有限公司 | Low-capacitance low-voltage TVS device optimizing structure and manufacturing process, and manufacturing method for low-capacitance low-voltage TVS device |
| CN105932069B (en) * | 2016-05-12 | 2023-04-18 | 上海芯石微电子有限公司 | Low-capacitance low-voltage TVS device with optimized structure and process and manufacturing method thereof |
| CN109390887A (en) * | 2017-08-14 | 2019-02-26 | 深圳康普盾科技股份有限公司 | A kind of combined connection box having lightning protection function |
| CN109390887B (en) * | 2017-08-14 | 2024-02-02 | 深圳康普盾科技股份有限公司 | Combined junction box with lightning protection function |
| CN108169548A (en) * | 2018-01-29 | 2018-06-15 | 西安神电电器有限公司 | A kind of arrester on-Line Monitor Device |
| CN110954739A (en) * | 2019-11-19 | 2020-04-03 | 上海沪臻智能科技有限公司 | AC voltage zero-crossing trigger detection circuit |
| CN117913759A (en) * | 2024-01-29 | 2024-04-19 | 广拓太阳能发电共和有限公司 | Wind power lightning protection system based on multi-pulse surge protector |
| CN117913759B (en) * | 2024-01-29 | 2024-08-06 | 广拓太阳能发电共和有限公司 | Wind power lightning protection system based on multi-pulse surge protector |
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| CN104167724B (en) | 2017-06-20 |
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