CN201048366Y - Solid relay - Google Patents
Solid relay Download PDFInfo
- Publication number
- CN201048366Y CN201048366Y CNU2007200377304U CN200720037730U CN201048366Y CN 201048366 Y CN201048366 Y CN 201048366Y CN U2007200377304 U CNU2007200377304 U CN U2007200377304U CN 200720037730 U CN200720037730 U CN 200720037730U CN 201048366 Y CN201048366 Y CN 201048366Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- ssr
- output
- state relay
- emitting diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000007787 solid Substances 0.000 title abstract description 5
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 230000000087 stabilizing effect Effects 0.000 claims description 23
- 230000009467 reduction Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004069 differentiation Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
Images
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model relates to an SSR electronic switch with a judging and alarming structure; the utility model is characterized in that the output end of a solid relay is bridged with a display circuit that is connected in series with a voltage-reducing circuit and an LBD, and an SSR fault-detecting circuit composed of an optical coupler and a trigger is additionally arranged. The utility model can judge the faults of a short circuit, an open circuit and a unidirectional continuity happening to the SSR output end, and can judge whether a load and power loop is in a normal working state and output electrical signals to control a computer or the other alarming circuits when an open circuit or a unidirectional continuity happens to the thyristor on the SSR output end. When adopting an external power supply, the fault-detecting circuit can output electrical signals to control a computer or the other alarming circuits when a short circuit happens to the thyristor on the SSR output end and when the power load loop is in an abnormal state, thereby diversifying the fault judgment, playing a control role and enhancing the working reliability of the solid relay greatly. Thereby the fault-detecting circuit is applicable to both an AC SSR and a DC SSR.
Description
Technical field
Utility model relates to a kind of solid-state relay electronic switch, especially about being with the solid-state relay electronic switch of differentiation and warning structure.
Background technology
Solid-state relay (Solid State Relay is called for short SSR), can be with less input current control than big electric loading electric current, have characteristics such as no-spark, noiseless, corrosion-resistant, vibration resistance, explosion-proof, anti-dust, it is a kind of contactless electronic beam switch, be widely used in the industrial automation field, be specially adapted to require frequent switch, burn into humidity and require explosion-proof occasion.Be difficult for discovering after yet there is damage in general SSR, cause the load cisco unity malfunction; And load can not conveniently be differentiated during holding state and whether power circuit is normal.Taiwan patent 531038 proposes a kind ofly between the circuits for triggering and output circuit of SSR, and the circuit for detecting that an optical coupling device and triode are formed is set, and when SSR output circuit current anomaly, sends alarm signal, and prompting SSR breaks down.Yet this circuit can only be differentiated solid-state relay self output short trouble, and can not differentiate the open fault that the solid-state relay output occurs (the signal voltage input is arranged, output thyristor can not normally).Chinese patent 00220080.5 disclosed solid-state relay, proposition thyristor output in SSR is provided with coupling circuit, and the secondary coil of coupling circuit connects light-emitting diode, shows with this whether thyristor itself and its load circuit running status be normal.Whether yet this circuit can not be differentiated thyristor and power supply and load circuit at holding state normal, and this circuit needs certain load current driving could be luminous, when bearing power hour, when for example load current is less than 0.5A, light-emitting diode because of electric current is too small can not be normally luminous, thereby can not judge whether SSR itself and power supply and load circuit normal; And this circuit can not be exported the signal of telecommunication and is used for control, warning etc. when break down in SSR or load power source loop.
In addition, a common defects of aforementioned two patents is can not differentiate SSR output thyristor and unidirectional conducting (when promptly signal being arranged, the unidirectional conducting of SSR output thyristor) fault occur.It is pulsating direct current that this fault makes the electric current that flows through load, except that the load cisco unity malfunction, is fatal to some load (as motor) consequence.
Besides, another deficiency of above-mentioned two patents is, sets up circuit and all is not suitable for the once-through type solid-state relay, also just limited range of application.
The utility model content
The purpose of utility model is to overcome the deficiency of above-mentioned prior art, provide a kind of and can not only differentiate the short circuit of solid-state relay self output, open circuit, unidirectional conducting failure, and can also differentiate whether normal solid-state relay of load and electric power loop operating state.
Another purpose of utility model be to provide a kind of can not only be by bright, the differentiation fault of going out of light-emitting diode, but also can be when open circuit or unidirectional conducting failure appear in the thyristor of SSR output, the solid-state relay of output signal of telecommunication control computer or other warning circuits.
A utility model purpose again is to provide a kind of and can also short trouble occurs at SSR output thyristor, and the power source loads loop is when undesired, the solid-state relay of output signal of telecommunication control computer or other warning circuits.
Utility model first purpose realizes, the main improvement is the display circuit that has reduction voltage circuit to be connected in series with light-emitting diode in solid-state relay output cross-over connection one, thereby be implemented in or do not had under the input control voltage situation, light-emitting diode bright, go out whether differentiate SSR self or power supply and load circuit normal.Specifically, the utility model solid-state relay is characterized in that the display circuit that solid-state relay output cross-over connection one has reduction voltage circuit to be connected in series with light-emitting diode.
Utility model is described
Solid-state relay, its input circuit can adopt constant-current source circuit, can also adopt voltage stabilizing circuit, perhaps other current-limiting circuits.Circuits for triggering can be made up of discrete component, also can use integrated circuit; Both can zero cross fired, can also trigger at random.Output circuit can be used bidirectional thyristor, can also also form with unidirectional thyristor is anti-.Solid-state relay both can be an AC type, also can be once-through type.
Reduction voltage circuit, main effect provides the normal operating voltage of light-emitting diode, can adopt various step-down modes in the prior art, for example electric capacity, resistance drop volt circuit, perhaps resistance step-down separately for the once-through type solid-state relay, should be adopted the resistance step-down.
For guaranteeing in the conducting of SSR output, when output is low-voltage, avoid light-emitting diode to glimmer causing differentiating error, can also with light-emitting diode differential concatenation one voltage stabilizing didoe, make it reliably to end.Voltage stabilizing didoe can be a bidirectional trigger diode, and has other electronic devices replacements of zener effect.
For AC type SSR, damage for avoiding light-emitting diode to bear higher reverse voltage, can be at light-emitting diode and voltage stabilizing didoe series circuit two ends, a diode in parallel makes diode polarity opposite with light-emitting diode; Perhaps in display circuit, be connected in series full-wave rectifying circuit, the series circuit of light-emitting diodes and voltage stabilizing didoe is connected across rectification output end.
For once-through type SSR, the output state display circuit is become by dropping resistor, voltage stabilizing didoe, light-emitting diode series connection circuit bank, this circuit is connected across the SSR output, at this moment should make light-emitting diode polarity identical with the SSR output polarity, and voltage-stabiliser tube is opposite with the SSR output polarity.
Utility model second purpose realizes, be to form the solid-state relay failure detector circuit by optical coupler, trigger being provided with one again, light-emitting diode is forward connected in the input of optical coupler and the output state display circuit, and the power supply of failure detector circuit is taken from the SSR input control voltage.
Optical coupler is transferred to trigger with the change in voltage of SSR output, makes trigger export corresponding fault-signal, and makes trigger and SSR output keep reliable electrical isolation.Optical coupler can be a various ways in the prior art, and wherein preferred the employing formed integrated circuit by light-emitting diode and photosensitive triode.
Described trigger can adopt various ways in the prior art, wherein preferably adopts this schmitt trigger.
SSR just often has input control voltage, SSR output conducting and have only very low voltage drop, and the optical coupler input of open fault testing circuit ends, trigger output low level signal; When open fault or unidirectional conducting failure occurring as SSR, as applied signal voltage, the SSR output can not normally and higher voltage is arranged, the conducting of optical coupler input, and the trigger input is a low level, the high level signal of trigger output at this moment.
Utility model the 3rd purpose realizes, be to make failure detector circuit adopt external power supply, thereby not only can detect SSR output thyristor open circuit or unidirectional conducting failure, and can detect the short trouble that element such as SSR output thyristor occurs, and whether differentiate the load power source loop normal.
SSR just often, no input control voltage, SSR output open circuit and high voltage (supply voltage) is arranged, the conducting of optical coupler input, the trigger input is a low level, the high level signal of trigger output at this moment; When short trouble or power load circuit occurring and break down as SSR, when no input control voltage, short circuit of SSR output or power load circuit have fault and make SSR output no-voltage or be very low conducting voltage when falling, the optical coupler input ends, making the trigger input is high level, at this moment trigger output low level signal.
The utility model solid-state relay, owing to adopt the display circuit that has reduction voltage circuit to be connected in series in output cross-over connection one with light-emitting diode, the short circuit of solid-state relay self output, open circuit, unidirectional conducting failure can not only be differentiated, and load can also be differentiated and whether the electric power loop operating state is normal; Owing to be change in voltage by the SSR output, the control light-emitting diode is bright, go out, and therefore the display circuit of setting up not only can be used for ac solid relay, and can also be used for dc solid-state relay.Secondly, owing to have additional optical coupler, trigger composition solid-state relay failure detector circuit, can not only be by bright, the differentiation fault of going out of light-emitting diode, but also can be when open circuit or unidirectional conducting failure appear in the thyristor of SSR output, output signal of telecommunication control computer or other warning circuits.Besides, failure detector circuit adopts external power supply, can also short trouble appear at SSR output thyristor, and the power source loads loop is when undesired, output signal of telecommunication control computer or other warning circuits, thus fault distinguishing made, not only can be diversified, and can play control action, improved the solid-state relay functional reliability greatly.
Below, further specify utility model structure and function by three embodiments.
Description of drawings
Fig. 1 is the utility model first embodiment schematic diagram.
Fig. 2 is the utility model second embodiment schematic diagram.
Fig. 3 is utility model the 3rd an embodiment schematic diagram.
Embodiment
Embodiment 1: referring to Fig. 1, utility model solid-state relay 1 is connected to form in turn by constant-current source circuit 2, circuits for triggering 3, thyristor output circuit 4.At the solid-state relay output, cross-over connection has output state display circuit 5.The output state display circuit, by capacitor 5.1, resistance 5.2 step-downs, through bridge rectifier 5.3 rectifications, after light-emitting diode 5.5 and voltage stabilizing didoe 5.4 differential concatenations, be connected across bridge rectifier 5.3 rectification output ends, make light-emitting diode be in forward bias, and make voltage stabilizing didoe be in reverse bias.
Operation principle:
1, during holding state (promptly not having input control voltage), the LED of SSR input does not work, output thyristor open circuit.This moment SSR output end voltage (supply voltage), through capacitor 5.1, resistance 5.2 step-down current limlitings, direct voltage after bridge rectifier 5.3 rectifications makes voltage-stabiliser tube 5.4 reverse breakdowns, forward voltage is added on the output LED5.5, make it luminous, show that power supply and load circuit are normal, and there is not short trouble in element such as SSR output thyristor.Short trouble occur as elements such as SSR output thyristors this moment, or power load circuit is undesired, and SSR output no-voltage or voltage are very low, and deficiency is so that voltage stabilizing didoe 5.4 reverse breakdowns, and output LED5.5 does not have forward voltage and ends not luminous.
2, the input of control voltage is arranged, input LED lights, the conducting of SSR output thyristor.At this moment the SSR output has only very low thyristor conduction voltage drop (being generally less than 1.8V AC), and this undertension is so that voltage stabilizing didoe 5.4 reverse breakdowns, and it is not luminous that output LED5.5 does not have forward voltage, shows that SSR itself and power load circuit are all normal.Thyristor open circuit or unidirectional conducting failure occur as SSR this moment, and output has high voltage, and voltage stabilizing didoe 5.4 reverse breakdowns, forward voltage are added in output LED5.5 and upward keep luminous.
Embodiment 2: referring to Fig. 2, in the voltage stabilizing didoe 5.4 and light-emitting diode 5.5 series circuits of Fig. 1 circuit, the optical coupler 6.1 of forming by light-emitting diode and phototriode of connecting again, and the failure detector circuit 6 formed of this schmitt trigger 6.2, the output fault signal of telecommunication.Optical coupler is formed integrated circuit by light-emitting diode and photosensitive triode, and wherein the phototriode of optical coupler output is connected across the input of this schmitt trigger 6.2, and the power supply of this schmitt trigger is taken from input control voltage.For restriction because of input control voltage when higher, magnitude of voltage is too high during output high level fault signal, can add a voltage stabilizing circuit of being made up of voltage stabilizing didoe 6.3 and resistance at this schmitt trigger output.
When input control voltage, normal as SSR, then output is very low conduction voltage drop, voltage stabilizing didoe 5.4 can not reverse breakdown, LED5.5 is not luminous in output, optical coupler 6.1 input no-voltages and ending, and the output phototriode ends, this schmitt trigger input triode conducting and output triode ends, failure detector circuit 6 outputs are low level (less than 0.1V DC); Open circuit or unidirectional conducting appear in the thyristor as SSR, voltage stabilizing didoe 5.4 reverse breakdowns, and LED5.5 is luminous in output, optical coupler 6.1 is imported to such an extent that electricly make the phototriode conducting, this schmitt trigger input triode ends, output triode conducting, output high level (as 5V DC).
Embodiment 3: referring to Fig. 3, as embodiment 2, the power supply of failure detector circuit 6 is supplied with by external power, not only can detect SSR output thyristor open circuit or unidirectional conducting failure, whether and can detect the short trouble that element such as SSR output thyristor occurs, and it is normal to differentiate the load power source loop.
When input control voltage is arranged, if the failure detector circuit output low level shows that SSR output thyristor does not exist open circuit or unidirectional conducting failure, if failure detector circuit output high level shows that open circuit or unidirectional conducting failure appear in the output thyristor.During no input control voltage, if failure detector circuit output high level shows that SSR and load power source circuit are all normal, if the failure detector circuit output low level shows that short trouble may appear in the SSR output or the load power source circuit is undesired.
In addition, voltage stabilizing didoe 5.4 can also with bidirectional trigger diode and etc. have a Zener characteristic other electronic devices replace.
Claims (9)
1. solid-state relay is characterized in that the display circuit that solid-state relay output cross-over connection one has reduction voltage circuit to be connected in series with light-emitting diode.
2. according to the described solid-state relay of claim 1, it is characterized in that said light-emitting diode differential concatenation has the Zener voltage stabilizing element that it was ended in reliable year when SSR output low-voltage.
3. according to the described solid-state relay of claim 2, it is characterized in that the Zener voltage stabilizing element circuit two ends of light-emitting diode and differential concatenation and be connected with diode.
4. according to the described solid-state relay of claim 1, it is characterized in that being serially connected with in the display circuit full-wave rectifying circuit, and make the series circuit of light-emitting diode and voltage stabilizing diode element be connected across rectification output end, and making light-emitting diode be in forward bias, voltage stabilizing diode element is in reverse bias.
5. according to claim 1 or 2 described solid-state relays, it is characterized in that also having a solid-state relay failure detector circuit of forming by optical coupler, trigger, wherein light-emitting diode is forward connected in optical coupler input and the output state display circuit, and the power supply of failure detector circuit is taken from input control voltage.
6. according to the described solid-state relay of claim 5, it is characterized in that optical coupler forms integrated circuit by light-emitting diode and photosensitive triode.
7. according to the described solid-state relay of claim 5, it is characterized in that trigger is this schmitt trigger.
8. according to the described solid-state relay of claim 5, it is characterized in that the voltage stabilizing circuit that the trigger output is made up of voltage stabilizing didoe and resistance.
9. according to the described solid-state relay of claim 5, it is characterized in that the failure detector circuit power supply is an external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200377304U CN201048366Y (en) | 2007-05-18 | 2007-05-18 | Solid relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200377304U CN201048366Y (en) | 2007-05-18 | 2007-05-18 | Solid relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201048366Y true CN201048366Y (en) | 2008-04-16 |
Family
ID=39300958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200377304U Expired - Fee Related CN201048366Y (en) | 2007-05-18 | 2007-05-18 | Solid relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201048366Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900790A (en) * | 2009-05-28 | 2010-12-01 | 株式会社山武 | Relay failure detecting device |
| CN102158214A (en) * | 2011-01-18 | 2011-08-17 | 朱虹 | Alternating-current solid-state relay (SSR) |
| CN103475347A (en) * | 2013-09-10 | 2013-12-25 | 贵州航天电器股份有限公司 | Single-tube-type self-hold solid state relay |
| CN105158664A (en) * | 2015-08-19 | 2015-12-16 | 斯坦恩贝格(北京)电子有限公司 | Solid state relay breakdown warning indication circuit |
| CN106383544A (en) * | 2016-11-29 | 2017-02-08 | 福建师范大学福清分校 | Current isolation SSR controller of alternating current 24V switch and control method thereof |
| CN106941348A (en) * | 2016-01-04 | 2017-07-11 | 英飞凌科技股份有限公司 | To contain the intelligent input of the relay-set of solid-state relay |
| CN110426314A (en) * | 2019-09-04 | 2019-11-08 | 上海乐研电气有限公司 | On-line sampling check-up gas density electrical relay with defencive function |
| CN112886546A (en) * | 2021-03-25 | 2021-06-01 | 蔡旭强 | Integrated solid-state relay with monitoring function |
-
2007
- 2007-05-18 CN CNU2007200377304U patent/CN201048366Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900790A (en) * | 2009-05-28 | 2010-12-01 | 株式会社山武 | Relay failure detecting device |
| US8339761B2 (en) | 2009-05-28 | 2012-12-25 | Azbil Corporation | Relay failure detecting device |
| CN101900790B (en) * | 2009-05-28 | 2013-03-20 | 阿自倍尔株式会社 | Relay failure detecting device |
| CN102158214A (en) * | 2011-01-18 | 2011-08-17 | 朱虹 | Alternating-current solid-state relay (SSR) |
| CN103475347A (en) * | 2013-09-10 | 2013-12-25 | 贵州航天电器股份有限公司 | Single-tube-type self-hold solid state relay |
| CN103475347B (en) * | 2013-09-10 | 2016-06-15 | 贵州航天电器股份有限公司 | A kind of Single-tube-type self-hold solid state relay |
| CN105158664A (en) * | 2015-08-19 | 2015-12-16 | 斯坦恩贝格(北京)电子有限公司 | Solid state relay breakdown warning indication circuit |
| CN106941348A (en) * | 2016-01-04 | 2017-07-11 | 英飞凌科技股份有限公司 | To contain the intelligent input of the relay-set of solid-state relay |
| CN106383544A (en) * | 2016-11-29 | 2017-02-08 | 福建师范大学福清分校 | Current isolation SSR controller of alternating current 24V switch and control method thereof |
| CN110426314A (en) * | 2019-09-04 | 2019-11-08 | 上海乐研电气有限公司 | On-line sampling check-up gas density electrical relay with defencive function |
| CN112886546A (en) * | 2021-03-25 | 2021-06-01 | 蔡旭强 | Integrated solid-state relay with monitoring function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201048366Y (en) | Solid relay | |
| CN102890235B (en) | A kind of fault detection method and device | |
| CN206321756U (en) | Power failure detection circuit and switching power supply circuit | |
| CN101202468A (en) | Method and device for switching control of main and standby power supplies | |
| CN206235687U (en) | A kind of reliable detection circuit of AC dump signal | |
| CN102223749B (en) | Inserted type multifunctional light emitting diode (LED) drive circuit | |
| CN100452603C (en) | Inspecting circuit and method for switching power-supply outputting voltage | |
| CN203984085U (en) | Uninterrupted power supply control device | |
| CN102778849B (en) | Switching on and shutting down control circuit, electronic equipment and on-off control method | |
| CN101400202A (en) | Apparatus for dynamically and statically monitoring fault of multi-path car lamp | |
| CN213544754U (en) | Relay switch state monitoring circuit and air conditioner | |
| CN102082042A (en) | Relay control circuit with current detecting function | |
| CN114784752A (en) | Leakage protection device and detection method thereof | |
| CN104749423A (en) | Power failure detection circuit for direct current power supply | |
| CN112114251A (en) | Relay switch state monitoring circuit and control method and air conditioner | |
| CN218510283U (en) | Electromagnetic valve driving circuit capable of monitoring action current | |
| CN207652017U (en) | A kind of input undervoltage power-down protection circuit | |
| CN210865095U (en) | Road traffic signal lamp driving and detecting circuit | |
| CN209267156U (en) | Overvoltage protection circuit based on chip and electronic equipment | |
| CN203631410U (en) | Vacuum circuit breaker controlling circuit and vacuum circuit breaker controlling system | |
| CN203151808U (en) | LED driving circuit capable of preventing over current | |
| CN2653521Y (en) | Phase-loss detection circuit for power supply grid | |
| CN2031583U (en) | Integrated Circuit Refrigerator Automatic Protection Device | |
| CN101917180B (en) | Universal electronic controller for relay contactors and solid relays | |
| CN109391255B (en) | Normally open normally closed integrated two-wire proximity switch circuit |
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: 20080416 Termination date: 20120518 |