CN201490993U - Photoelectric isolated high-reliability electronic relay - Google Patents
Photoelectric isolated high-reliability electronic relay Download PDFInfo
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- CN201490993U CN201490993U CN2009202175999U CN200920217599U CN201490993U CN 201490993 U CN201490993 U CN 201490993U CN 2009202175999 U CN2009202175999 U CN 2009202175999U CN 200920217599 U CN200920217599 U CN 200920217599U CN 201490993 U CN201490993 U CN 201490993U
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Abstract
The utility model discloses a photoelectric isolated high-reliability electronic relay, which comprises an input circuit, an isolating circuit and an output circuit. The input circuit is connected with the isolating circuit; the input circuit transmits an electric signal to the isolating circuit; the isolating circuit is connected with the output circuit; the isolating circuit transmits the electric signal subjected to photocoupling to the output circuit; and the isolating circuit is an optical coupler. In the electronic relay of the utility model, the input electric signal is applied to a luminescent tube, and then light rays irradiate a photosensor so that the output electric signal changes correspondingly, wherein the input electric signal and the output electric signal are coupled by light and are isolated from each other electrically, namely the input electric signal and the output electric signal has no electric direct contact, so the capacity of resisting disturbance is high.
Description
Technical field
The utility model relates to a kind of relay, particularly relates to the highly reliable electronic relay of a kind of photoelectricity isolated form.
Background technology
Relay is a kind of electronic control device; it has control system (claim not only input circuit) and Be Controlled system (but also claiming output loop); usually be applied in the automatic control circuit; it is actually a kind of " automatic switch " that removes to control big electric current with less current, so play effects such as automatic adjusting, safeguard protection, change-over circuit in circuit.In multiple relay, electronic relay is that a kind of two terminals are input, two four-terminal devices that terminals are output in addition, and the middle electricity that adopts isolating device to realize input and output is isolated.Electronic relay can be divided into AC type and once-through type by the load power source type; Can be divided into open type and closed type by the switch pattern; Can be divided into mixed type and transformer isolation type by isolating pattern.But at present the electronic relay of conventional these two kinds of isolation methods that use exists that response speed is slow, wear out easily in the contact, many shortcomings such as the phenomenon of contact spark adhesion and useful life is short is arranged.
Summary of the invention
For this reason, technical problem to be solved in the utility model be existing electronic relay exist that response speed is slow, wear out easily in the contact, have the contact spark adhesion phenomenon and useful life short technical problem, proposes a kind of with photoelectricity isolation method electronic relay isolation, that have high reliability.
For solving the problems of the technologies described above, the highly reliable electronic relay of a kind of photoelectricity isolated form of the present utility model, comprise input circuit, buffer circuit and output circuit, described input circuit links to each other with described buffer circuit, and described input circuit is delivered to described buffer circuit with the signal of telecommunication; Described buffer circuit links to each other with described output circuit, and described buffer circuit will be delivered to described output circuit through the signal of telecommunication of photoelectricity coupling; Described buffer circuit is an optocoupler.
In technique scheme, described optocoupler comprises a luminous tube and a light-sensitive device.
In technique scheme, described luminous tube is a light-emitting diode.
In technique scheme, the positive pole of described light-emitting diode links to each other with described input circuit respectively with negative pole.
In technique scheme, described light-sensitive device is a phototriode.
In technique scheme, the collector and emitter of described phototriode links to each other with described output circuit.
In technique scheme, be provided with at least one Transient Suppression Diode and a piezo-resistance in the described output circuit.
Technique scheme of the present utility model has the following advantages compared to existing technology:
At first, electronic relay of the present utility model, it is added on the luminous tube by the signal of telecommunication with input, light shines on the light-sensitive device again, makes the signal of telecommunication of output produce respective change, wherein, the signal of telecommunication of input and the signal of telecommunication of output are coupled through light, be mutual isolation on electricity, promptly do not have contacting directly of electricity, antijamming capability is strong.
Secondly, the starting current of electronic relay of the present utility model is little, and 1 milliampere can start.
Have, the electronic relay response time of the present utility model is short again, and its switch speed can reach 500 microseconds.
Have again, the driving load current maximum of electronic relay of the present utility model can be supported 40 amperes again.
Have again, electronic relay of the present utility model can be good at driving inductive load again, has the transient state suppressing protection.
Have again, the working temperature interval of electronic relay of the present utility model is wide again :-40 degree-90 degree Celsius.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail below, wherein:
Fig. 1 is the electrical block diagram of a kind of embodiment of electronic relay of the present utility model;
Reference numeral is expressed as: 1-light-emitting diode, 2-phototriode, the mos of 3-P raceway groove pipe, 41-piezo-resistance, 42,43-resistance, 5-positive source, 6-output, 71, the two-way Transient Suppression Diode of 72-.
Embodiment
Fig. 1 has shown a kind of embodiment of electronic relay of the present utility model, a kind of electronic relay, comprise input circuit, buffer circuit and output circuit, described input circuit links to each other with described buffer circuit, and described input circuit is delivered to described buffer circuit with the signal of telecommunication; Described buffer circuit links to each other with described output circuit, and described buffer circuit will be delivered to described output circuit through the signal of telecommunication of photoelectricity coupling; Described buffer circuit is an optocoupler, and it comprises a light-emitting diode 1 and a phototriode 2.The positive pole of this light-emitting diode 1 links to each other with described input circuit respectively with negative pole, and the collector and emitter of this phototriode 2 links to each other with described output circuit.Be provided with resistance capaciting absorpting circuit in the described output circuit, its mos pipe 3 series connection by a piezo-resistance 41 and a P raceway groove constitute.
In the electronic relay of the present utility model, described input circuit comprises a constant-current circuit and a light-emitting diode, the Current Control that constant-current circuit makes control circuit within the specific limits, light-emitting diode is used for showing input state.Input circuit links to each other with buffer circuit, and buffer circuit is isolated input and output photoelectricity; Output circuit links to each other with buffer circuit, and output circuit comprises the absorption circuit, and its mos pipe 3 series connection by a piezo-resistance 41 and a P raceway groove constitute, and described two diodes are respectively two-way Transient Suppression Diode 71 and two-way Transient Suppression Diode 72.This circuit absorbs by piezo-resistance and Transient Suppression Diode, and piezo-resistance is the response of microsecond level, transient state suppressing can transient absorption 600 watts instantaneous power.Be connected with output 6 between described two-way Transient Suppression Diode 71 and the two-way Transient Suppression Diode 72.The immediate current that described absorption circuit prevents output is excessive and damage thyristor in the output circuit.In the described output circuit, be connected with resistance 42 between the collector electrode of described phototriode 2 and the positive source 5, be connected with resistance 43 between the emitter of described phototriode 2 and the ground connection.Described resistance 42 and described resistance 43 play the effect of protective circuit respectively.
The electronic relay course of work of the present utility model is as follows: when the input of control voltage, light-emitting diode in the input circuit is bright, optoelectronic switch is opened, make the silicon controlled trigger end produce trigger current, thereby make the controllable silicon conducting, promptly form path, the output conducting realizes the less big voltage in input voltage control output end.
Electronic relay of the present utility model, it connects the importation, need add a current-limiting resistance, follow according to the occasion of using, calculate about 1 milliampere and get final product, for example the single-chip microcomputer of 5V, directly connecing a 4.7K resistance gets final product, as long as between the both positive and negative polarity of light-emitting diode input current is arranged, get final product starting load, the response time is 500 microseconds, load has transient state suppressing, when using, this relay can directly connect single-chip microcomputer output.
Electronic relay of the present utility model, switching response speed be in the microsecond level, 0.06 ohm of contact resistance, no physics contact, long service life, highly reliable, itself support transient state suppressing, need not be additionally in the expense of increase design circuit, and this element can directly use single-chip microcomputer directly to drive, load can directly connect, 40 amperes of maximum operating currenbts can be realized 1 milliampere, drive 40 amperes, and, can not influence the microcontroller part through the photoelectricity isolation.
Use electronic relay of the present utility model, can significantly reduce the workload of design circuit, saved elements such as holding the stream diode, save the circuit that drives relay, saved, prevented the circuit that direction is disturbed, use this original paper to raise the efficiency, reduce development cost.Electronic relay of the present utility model in addition is highly reliable type, the high-low temperature resistant degree, and impact resistance, every data all can be used at military products environment such as aerospace on performance.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And conspicuous variation of being extended out thus or change still are among the protection range of the invention.
Claims (7)
1. the highly reliable electronic relay of photoelectricity isolated form comprises input circuit, buffer circuit and output circuit, it is characterized in that: described input circuit links to each other with described buffer circuit, and described input circuit is delivered to described buffer circuit with the signal of telecommunication; Described buffer circuit links to each other with described output circuit, and described buffer circuit will be delivered to described output circuit through the signal of telecommunication of photoelectricity coupling; Described buffer circuit is an optocoupler.
2. electronic relay according to claim 1 is characterized in that: described optocoupler comprises a luminous tube and a light-sensitive device.
3. electronic relay according to claim 2 is characterized in that: described luminous tube is a light-emitting diode.
4. electronic relay according to claim 3 is characterized in that: the positive pole of described light-emitting diode links to each other with described input circuit respectively with negative pole.
5. electronic relay according to claim 2 is characterized in that: described light-sensitive device is a phototriode.
6. electronic relay according to claim 5 is characterized in that: the collector and emitter of described phototriode links to each other with described output circuit.
7. according to the arbitrary described electronic relay of claim 1 to 6, it is characterized in that: be provided with at least one Transient Suppression Diode and a piezo-resistance in the described output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202175999U CN201490993U (en) | 2009-09-28 | 2009-09-28 | Photoelectric isolated high-reliability electronic relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202175999U CN201490993U (en) | 2009-09-28 | 2009-09-28 | Photoelectric isolated high-reliability electronic relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201490993U true CN201490993U (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202175999U Expired - Fee Related CN201490993U (en) | 2009-09-28 | 2009-09-28 | Photoelectric isolated high-reliability electronic relay |
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| CN (1) | CN201490993U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021737A (en) * | 2012-12-04 | 2013-04-03 | 贵州天义电器有限责任公司 | Hybrid high power relay |
| CN108332137A (en) * | 2018-03-02 | 2018-07-27 | 国网山东省电力公司泗水县供电公司 | A kind of electric power first-aid lighting device |
-
2009
- 2009-09-28 CN CN2009202175999U patent/CN201490993U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021737A (en) * | 2012-12-04 | 2013-04-03 | 贵州天义电器有限责任公司 | Hybrid high power relay |
| CN108332137A (en) * | 2018-03-02 | 2018-07-27 | 国网山东省电力公司泗水县供电公司 | A kind of electric power first-aid lighting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20130928 |