CN201252526Y - Solid state relay triggered by small current - Google Patents
Solid state relay triggered by small current Download PDFInfo
- Publication number
- CN201252526Y CN201252526Y CNU200820137123XU CN200820137123U CN201252526Y CN 201252526 Y CN201252526 Y CN 201252526Y CN U200820137123X U CNU200820137123X U CN U200820137123XU CN 200820137123 U CN200820137123 U CN 200820137123U CN 201252526 Y CN201252526 Y CN 201252526Y
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- live wire
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- alternating voltage
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Abstract
The utility model belongs to a solid state relay triggered by a small current, which belongs to the field of relays. The solid state relay triggered by a small current comprises an output photocoupler of zero-crossing trigger bidirectional thyristor, a high-power bidirectional thyristor and an absorber circuit which comprises resistors and capacitors, wherein the first pin of the output photocoupler of zero-crossing trigger bidirectional thyristor is connected with the anode of a control signal from an SCM or a digital circuit, the second pin is connected with the cathode of the control signal from the SCM or the digital circuit, the third pin is connected with the control electrode of the high-power bidirectional thyristor, and the fourth pin is connected with the live wire input terminal of an alternative voltage; the T1 terminal of the high-power bidirectional thyristor is connected with the live wire input terminal of the alternative voltage, and the T2 terminal is connected with the live wire output terminal of the controlled alternative voltage; one terminal of the absorber circuit is connected with the live wire input terminal of the alternative voltage, and the other terminal is connected with the fire wire output terminal of a controlled alternative current.
Description
Technical field
The utility model belongs to the relay field.
Background technology
Circuit board in the market has following deficiency with solid-state relay in the application of reality: 1) trigger current is requiring low-power consumption and digital circuit directly can not meet the requirements aspect the driving all more than 6mA.2) overall dimension is bigger than normal, is not suitable for the small size requirement of some occasion.
The utility model content
The utility model is intended to overcome the deficiency of available circuit plate with solid-state relay, provides a kind of and forms with discrete device, solid-state relay that can little current trigger; Thereby trigger current is adjusted to below the 3mA, can integrated 3 tunnel little current trigger solid-state relays on 3.6 * 4.3 square centimeters circuit board.
The technical scheme that the utility model is taked is: the solid-state relay of little current trigger, it is characterized in that, comprise zero cross fired bidirectional triode thyristor output photoelectrical coupler, large power bidirectional thyratron transistor and by resistance, the absorption circuit that electric capacity constitutes, wherein, 1 pin of zero cross fired bidirectional triode thyristor output photoelectrical coupler links to each other with the anode of the control signal Vin that is come by single-chip microcomputer or digital circuit, 2 pin link to each other with the negative terminal of the control signal Vin that single-chip microcomputer or digital circuit are come, 3 pin link to each other with the control utmost point G of large power bidirectional thyratron transistor, and 4 pin are linked on the live wire input Lin of alternating voltage; The T1 end of large power bidirectional thyratron transistor is linked on the live wire input Lin of alternating voltage, and the T2 end is linked on the controlled alternating voltage live wire output Lout; An end that absorbs resistance in the circuit is linked on the input Lin of live wire of alternating voltage, and the other end of resistance is linked on the end of electric capacity, and the other end that absorbs electric capacity in the circuit is linked on the output Lout of controlled alternating voltage live wire.
Basic principle: the control signal Vin that is come by single-chip microcomputer or digital circuit is added in the input that the zero cross fired bidirectional triode thyristor is exported photoelectrical coupler U201 by current-limiting resistance R202, the output controllable silicon conducting trigger switch circuit SCR201 conducting of U201 when control signal is high level and alternating voltage zero-crossing, switching circuit SCR201 disconnects when control signal is low level and alternating voltage zero-crossing.The method of this control switching circuit SCR201 conducting and disconnection when AC signal zero crossing can prevent that high order harmonic component is to the interference of circuit and to the pollution of electrical network.R207, the absorption circuit that C206 constitutes are the spikes for preventing to transmit from power supply, and surge voltage designs impact and the interference of zero cross fired bidirectional triode thyristor output photoelectrical coupler U201 and switching circuit SCR201.
The advantage of the solid-state relay circuit of the little current trigger of the utility model is: device is few, and price is low.The trigger current of zero cross fired bidirectional triode thyristor output photoelectrical coupler U201 is below the 3mA, and the direct driving of available single-chip microcomputer or digital circuit need not add drive circuit again.Reduced components and parts number and volume, can integrated 3 tunnel little current trigger solid-state relays on 3.6 * 4.3 square centimeters circuit board.This circuit has been used on the electric control valve of our company's production, through on-site verification, obtains promising result.Compare with domestic well-known producer electric control valve, not a halfpenny the worse on load capacity and reliability.
Description of drawings
Fig. 1 is the solid-state relay circuit diagram of the little current trigger of the utility model; Wherein, C206 electric capacity, R207 resistance, R202, R204 are two current-limiting resistances, SCR201 large power bidirectional thyratron transistor, U201 zero cross fired bidirectional triode thyristor output photoelectrical coupler.
Embodiment
With reference to the accompanying drawings, the utility model is further described:
The solid-state relay of little current trigger, the anode of the control signal Vin that is come by single-chip microcomputer or digital circuit is linked the end of current-limiting resistance R202, the other end of current-limiting resistance R202 is connected to 1 pin of zero cross fired bidirectional triode thyristor output photoelectrical coupler U201,2 pin of U201 link to each other with the negative terminal of the control signal Vin that single-chip microcomputer or digital circuit are come, 4 pin of U201 link to each other with the end of current-limiting resistance R204, the other end of current-limiting resistance R204 is linked on the live wire input Lin of alternating voltage, 3 pin of U201 link to each other with the control utmost point G of large power bidirectional thyratron transistor SCR201, the T1 end of SCR201 is linked on the live wire input Lin of alternating voltage, and the T2 of SCR201 end is linked on the controlled alternating voltage live wire output Lout.An end that absorbs the resistance R 207 on the circuit is linked on the live wire input Lin of alternating voltage, and the other end of R207 is linked on the end of capacitor C 206, and the other end of C206 is linked on the controlled alternating voltage live wire output Lout.
Claims (3)
1, the solid-state relay of little current trigger, it is characterized in that, comprise zero cross fired bidirectional triode thyristor output photoelectrical coupler, large power bidirectional thyratron transistor and by resistance, the absorption circuit that electric capacity constitutes, wherein, 1 pin of zero cross fired bidirectional triode thyristor output photoelectrical coupler links to each other with the anode of the control signal Vin that is come by single-chip microcomputer or digital circuit, 2 pin link to each other with the negative terminal of the control signal Vin that single-chip microcomputer or digital circuit are come, 3 pin link to each other with the control utmost point G of large power bidirectional thyratron transistor, and 4 pin are linked on the live wire input Lin of alternating voltage; The T1 end of large power bidirectional thyratron transistor is linked on the live wire input Lin of alternating voltage, and the T2 end is linked on the controlled alternating voltage live wire output Lout; An end that absorbs resistance in the circuit is linked on the input Lin of live wire of alternating voltage, and the other end of resistance is linked on the end of electric capacity, and the other end that absorbs electric capacity in the circuit is linked on the output Lout of controlled alternating voltage live wire.
2, the solid-state relay of little current trigger according to claim 1 is characterized in that, 1 pin of described zero cross fired bidirectional triode thyristor output photoelectrical coupler links to each other through the anode of current-limiting resistance with the control signal Vin that is come by single-chip microcomputer or digital circuit.
3, the solid-state relay of little current trigger according to claim 1, it is characterized in that, 4 pin of described zero cross fired bidirectional triode thyristor output photoelectrical coupler link to each other with current-limiting resistance, and the other end of current-limiting resistance is linked on the live wire input Lin of alternating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820137123XU CN201252526Y (en) | 2008-09-08 | 2008-09-08 | Solid state relay triggered by small current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820137123XU CN201252526Y (en) | 2008-09-08 | 2008-09-08 | Solid state relay triggered by small current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201252526Y true CN201252526Y (en) | 2009-06-03 |
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ID=40748188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820137123XU Expired - Lifetime CN201252526Y (en) | 2008-09-08 | 2008-09-08 | Solid state relay triggered by small current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201252526Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238610A (en) * | 2013-06-24 | 2014-12-24 | 珠海格力电器股份有限公司 | Power regulating circuit and electric pressure cooker |
| CN104333364A (en) * | 2014-11-04 | 2015-02-04 | 许蓬 | AC solid state relay and fault detecting method of load circuit of same |
| CN104935319A (en) * | 2015-07-10 | 2015-09-23 | 厦门市硅兆光电科技有限公司 | Novel solid-state relay (SSR) |
| CN104950706A (en) * | 2015-05-27 | 2015-09-30 | 成都格瑞思文化传播有限公司 | Intelligent appliance controller output control circuit |
| CN106438437A (en) * | 2016-12-16 | 2017-02-22 | 曾毅容 | Interface control circuit for pressure relief controller of positive pressure blower |
| CN113820625A (en) * | 2021-10-13 | 2021-12-21 | 上海电气泰雷兹交通自动化系统有限公司 | Circuit for detecting leakage current of alternating current solid-state relay |
-
2008
- 2008-09-08 CN CNU200820137123XU patent/CN201252526Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238610A (en) * | 2013-06-24 | 2014-12-24 | 珠海格力电器股份有限公司 | Power regulating circuit and electric pressure cooker |
| CN104333364A (en) * | 2014-11-04 | 2015-02-04 | 许蓬 | AC solid state relay and fault detecting method of load circuit of same |
| CN104333364B (en) * | 2014-11-04 | 2017-09-26 | 许蓬 | A kind of fault detection method of ac solid relay and the relay load circuit |
| CN104950706A (en) * | 2015-05-27 | 2015-09-30 | 成都格瑞思文化传播有限公司 | Intelligent appliance controller output control circuit |
| CN104935319A (en) * | 2015-07-10 | 2015-09-23 | 厦门市硅兆光电科技有限公司 | Novel solid-state relay (SSR) |
| CN106438437A (en) * | 2016-12-16 | 2017-02-22 | 曾毅容 | Interface control circuit for pressure relief controller of positive pressure blower |
| CN113820625A (en) * | 2021-10-13 | 2021-12-21 | 上海电气泰雷兹交通自动化系统有限公司 | Circuit for detecting leakage current of alternating current solid-state relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090603 |
|
| CX01 | Expiry of patent term |