CN203445850U - Solid state relay drive circuit - Google Patents
Solid state relay drive circuit Download PDFInfo
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- CN203445850U CN203445850U CN201320329840.3U CN201320329840U CN203445850U CN 203445850 U CN203445850 U CN 203445850U CN 201320329840 U CN201320329840 U CN 201320329840U CN 203445850 U CN203445850 U CN 203445850U
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- circuit
- overcurrent
- state relay
- voltage
- current
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Abstract
This utility model provides a solid state relay drive circuit, comprising a singlechip microcomputer control unit, a signal isolation unit, an overcurrent-overvoltage protection unit and a socket which are connected in series. The signal isolation unit is an optical-coupling isolation circuit which is strong in electric insulation capability and anti-jamming capability. The output terminal of an optocoupler is serially connected to the overcurrent-overvoltage protection unit. The overcurrent-overvoltage protection unit comprises a voltage stabilizing circuit and the overcurrent protection circuit. The voltage stabilizing circuit consists of a current-limiting resistor and a voltage stabilizing diode. The overcurrent protection circuit is made of an overload current resettable fuse. The advantages of the solid state relay device circuit are that: the electric signal transmission has a characteristic of single direction because of the mutual isolation between the input and the output of the optical coupler, and the optical coupler has a good electric insulation capability and an anti-jamming capability. The voltage-stabilizing diode ensures the stability of the overload voltage, and the overload current resettable fuse can perform overcurrent and overheat protection.
Description
Technical field
The utility model relates to a kind of solid-state relay drive circuit, belongs to field of power electronics.
Background technology
Solid-state relay is the contactless electronic beam switch with isolation features, machinery-free contact component in switching process, the resistance to resistance to mechanical shock of shaking, installation site is unrestricted, has good moistureproof and mildewproof Corrosion Protection, and input power is little, highly sensitive, power ratio control is little, and Electro Magnetic Compatibility is good, and noise is low and operating frequency is high.At present, the general solid-state relay drive circuit poor anti jamming capability of application and there is no the function of over-current over-voltage protection.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of antijamming capability by force and has the relay drive circuit of over-current over-voltage protection function.
For solving the problems of the technologies described above, the utility model solid-state relay drive circuit comprises Single-chip Controlling unit, signal isolated location, over-current over-voltage protection unit and the socket connecting successively; Wherein signal isolated location is electrical isolation capabilities and the strong optical coupling isolation circuit of antijamming capability, the output series connection over-current over-voltage protection unit of optocoupler; Over-current over-voltage protection unit comprises voltage stabilizing circuit and current foldback circuit.
Preferably, described voltage stabilizing circuit is comprised of a current-limiting resistance and voltage stabilizing didoe.
Preferably, current foldback circuit is a recovery insurance certainly.
Advantage and the good effect that the utlity model has are: due to isolation mutually between optocoupler input and output, electric signal transmission has the features such as one-way, so optocoupler has good electrical isolation capabilities and antijamming capability; Voltage stabilizing didoe ensures that load voltage is stable, certainly recovers insurance and plays overcurrent and overheating protection effect.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the circuit diagram of a specific embodiment of the present utility model.
Embodiment
As shown in Figure 1, 2, the utility model solid-state relay drive circuit, for the break-make of control relay, comprises the Single-chip Controlling unit 1, signal isolated location 2, over-current over-voltage protection unit 3 and the socket 4 that connect successively; Signal isolated location 2 comprises power supply VCC, resistance R 13, optocoupler U3 and resistance R 19, the pin 1 of optocoupler U3 is by current-limiting resistance R13 access 5V power supply VCC, pin 2 connects Single-chip Controlling unit 1, pin 3 ground connection of optocoupler U3, pin 4 connects 5V power supply by pull-up resistor R19, and the model of optocoupler U3 is PC817DIP4; Over-current over-voltage protection unit 3 comprises the insurance BX6 that consists of voltage stabilizing circuit and series connection with it resistance R 25 and voltage stabilizing didoe D29, and it is the insurance of recovery certainly of JK250-120U that insurance BX6 selects model, the output gang socket CZ2 of insurance BX6.
The course of work of this example: when single-chip microcomputer U1 output low level, reach enough voltage and drive optocoupler U3, optocoupler U3 conducting, signal transmits, the signal of telecommunication of output output drives solid-state relay work, in this process due between optocoupler input and output mutually isolation, electric signal transmission has the features such as one-way, so this solid-state relay drive circuit has good electrical isolation capabilities and antijamming capability, if while causing in circuit each point variation in voltage due to a variety of causes, the voltage stabilizing circuit that resistance R 25 and voltage stabilizing didoe D29 form is used for ensureing that load voltage is stable, if circuit is short-circuited or electric current is excessive, from recovering insurance BX6 automatic disconnection, after fault recovery, BX6 is from recovering connection.
Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (3)
1. a solid-state relay drive circuit, is characterized in that: comprise the Single-chip Controlling unit, signal isolated location, over-current over-voltage protection unit and the socket that connect successively; Wherein signal isolated location is electrical isolation capabilities and the strong optical coupling isolation circuit of antijamming capability, the output series connection over-current over-voltage protection unit of optocoupler; Over-current over-voltage protection unit comprises voltage stabilizing circuit and current foldback circuit.
2. solid-state relay drive circuit according to claim 1, is characterized in that: described voltage stabilizing circuit is comprised of a current-limiting resistance and voltage stabilizing didoe.
3. solid-state relay drive circuit according to claim 1, is characterized in that: described current foldback circuit is a recovery insurance certainly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320329840.3U CN203445850U (en) | 2013-06-08 | 2013-06-08 | Solid state relay drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320329840.3U CN203445850U (en) | 2013-06-08 | 2013-06-08 | Solid state relay drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203445850U true CN203445850U (en) | 2014-02-19 |
Family
ID=50096863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320329840.3U Expired - Fee Related CN203445850U (en) | 2013-06-08 | 2013-06-08 | Solid state relay drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203445850U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049018A (en) * | 2015-08-31 | 2015-11-11 | 常州工学院 | Novel solid-state relay |
| CN105307318A (en) * | 2014-06-06 | 2016-02-03 | 松下知识产权经营株式会社 | Switching device and load control system |
-
2013
- 2013-06-08 CN CN201320329840.3U patent/CN203445850U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307318A (en) * | 2014-06-06 | 2016-02-03 | 松下知识产权经营株式会社 | Switching device and load control system |
| CN105307318B (en) * | 2014-06-06 | 2018-06-19 | 松下知识产权经营株式会社 | Switching device and load control system |
| CN105049018A (en) * | 2015-08-31 | 2015-11-11 | 常州工学院 | Novel solid-state relay |
| CN105049018B (en) * | 2015-08-31 | 2018-02-09 | 常州工学院 | A kind of New Solid relay |
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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: 20140219 Termination date: 20140608 |