CN107959488A - A kind of solid-state relay circuit with short-circuit protection - Google Patents
A kind of solid-state relay circuit with short-circuit protection Download PDFInfo
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- CN107959488A CN107959488A CN201711210612.3A CN201711210612A CN107959488A CN 107959488 A CN107959488 A CN 107959488A CN 201711210612 A CN201711210612 A CN 201711210612A CN 107959488 A CN107959488 A CN 107959488A
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- resistance
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- triode
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0824—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in thyristor switches
Abstract
The invention discloses solid-state relay field of circuit technology, more specifically disclose a kind of solid-state relay circuit with short-circuit protection, including input circuit, control circuit, zero crossing circuitry, output circuit, absorbing circuit, short-circuit protection circuit and sample circuit, the present invention is by increasing short-circuit protection circuit and sample circuit, bidirectional triode thyristor Q3 has power-off reaction soon in the short-circuit protection circuit, and the characteristics of opening or turn off in Microsecond grade, so as to protect the load on the component and circuit in circuit, avoid causing damages, therefore have the characteristics that power-off is fireballing, and output circuit includes bidirectional triode thyristor TR1, therefore when solid-state relay, which loads, short circuit or damage occurs, meeting bidirectional triode thyristor TR1 in the output circuit is disconnected in time, so as to prolong the service life and reduce cost.
Description
Technical field
The invention discloses solid-state relay field of circuit technology, more specifically discloses a kind of solid-state with short-circuit protection
Relay circuit.
Background technology
Traditional solid-state relay used on the market does not all have short-circuit protection function, is caused when external load goes wrong
The damage of solid-state relay is often resulted in when electric current is excessive, general method is to concatenate a breaker conduct again on the line
The protector of circuit, but every circuit all concatenates a breaker, it is not only expensive to take place, since its breaker is pure mechanic structure
Reaction speed is slow, therefore role is not very big, so being the solid-state after often breaker is disconnected circuit
Relay also permanent damage, can not reuse.
The content of the invention
In view of this, the band that speed is fast, prolongs the service life and reduces cost is powered off the object of the present invention is to provide a kind of
The solid-state relay circuit of short-circuit protection.
In order to solve the above technical problems, the technical scheme is that：
A kind of solid-state relay circuit with short-circuit protection, including input circuit, control circuit, zero crossing circuitry, output electricity
Road, absorbing circuit, short-circuit protection circuit and sample circuit, the input circuit is by interface J1,3rd resistor R3, second resistance
R2, triode T2A, first resistor R1, the 3rd capacitance C3, the second capacitance C2, diode D1 and the first capacitance C1 compositions, it is described to connect
The anode of No. 1 end connection diode D1 of mouth J1, No. 2 ends connection 3rd resistor R3 one end of the interface J1, the described 3rd is electric
R3 other ends connection second resistance R2 one end is hindered, the cathode of the diode D1 is connected respectively with second capacitance C2 one end and three poles
It is grounded after No. 1 end connection of pipe T2A, second resistance is connected behind No. 6 ends of the second capacitance C2 other end connecting triodes T2A
The R2 other ends, No. 2 ends connection the first resistor R1, the 3rd capacitance C3 of the triode T2A are connected in parallel on first resistor R1 two
It is grounded behind end, the first capacitance C1 is connected in parallel on diode D1 both ends；
The control circuit is made of the 4th resistance R4, luminous tube LED, triode T1, the 5th resistance R5 and optocoupler DP2,
No. 1 end the 5th resistance R5 one end of connection of the optocoupler DP2, the cathode of the 4th resistance R4 connection luminous tubes LED, this shines
The anode of pipe LED connects No. 2 ends of optocoupler DP2, the second electricity of base stage connection of the triode T1 with the collector of triode T1
Hinder the R2 other ends, emitter connection first resistor R1 one end of triode T1；
The zero crossing circuitry is made of the 8th resistance R8 and the 11st resistance R11, the 11st resistance R11 one end connection
No. 4 ends of the optocoupler DP2, described 8th resistance R8 one end connect No. 3 ends of the optocoupler DP2；
No. 1 end that the output circuit includes bidirectional triode thyristor TR1, the bidirectional triode thyristor TR1 is connected to the optocoupler
Between No. 4 ends of DP2 and described 11st resistance R11 one end, No. 2 end connections the described 11st of the bidirectional triode thyristor TR1
The resistance R11 other ends, No. 3 ends of the bidirectional triode thyristor TR1 connect the 8th resistance R8 other ends；
The absorbing circuit is made of the tenth resistance R10, the 16th capacitance C16 and the first capacitance E1, first capacitance
E1 one end connects the tenth resistance R10 one end, and described tenth resistance R10 one end connects No. 3 ends of the bidirectional triode thyristor TR1,
The first capacitance E1 other ends connect the 16th capacitance C16 one end, and the connection of the 16th capacitance C16 one end is described two-way controllable
No. 2 ends of silicon TR1, the 16th capacitance C16 other ends connect the tenth resistance R10 other ends；
The short-circuit protection circuit is by the 4th capacitance C4, the 6th resistance R6, bidirectional triode thyristor Q3, the 13rd resistance R13, three
Pole pipe T2B, luminous tube LED1, the 7th resistance, triode T3 and the 9th resistance R9 compositions, described capacitance C4 one end connect double respectively
To No. 3 ends of silicon-controlled Q3 and the 6th resistance R6 one end, and capacitance C4 one end is grounded, the 6th resistance R6 other ends connection three
The collector of pole pipe T3, the base stage of the triode T3 connect the 9th resistance R9 one end, and the emitter connection of triode T3 is double
To No. 2 of silicon-controlled Q3 ends, No. 2 ends of the bidirectional triode thyristor Q3 connect the 5th resistance R5 other ends, it is described it is two-way can
Control No. 1 end the 13rd resistance R13 one end of connection of silicon Q3, and No. 5 of the 13rd resistance R13 other end connecting triodes T2B
End, No. 3 ends of the triode T2B connect No. 6 ends of the triode T2A, and No. 4 end ground connection of the triode T2A are described
The cathode of luminous tube LED1 is connected between the 13rd resistance R13 and bidirectional triode thyristor Q3, the anode connection of luminous tube LED1
7th resistance R7 one end is grounded；
The sample circuit is by the 12nd resistance R12, the 5th capacitance C5 and sensor J3, No. 1 end of the sensor J3
Connect the 12nd resistance R12 one end, and the emitter of the 12nd resistance R12 connecting triodes T3, the sensor
No. 2 end ground connection of J3, No. 3 ends of the sensor J3 are connected between the 12nd resistance R12 and the 5th capacitance C5, and the described tenth
The two resistance R12 other ends connect the 5th capacitance C5 one end, and described 5th capacitance C5 one end connects the 9th resistance R9 other ends,
And the 5th the capacitance C5 other ends ground connection.
Compared with the prior art, advantageous effects of the present invention are mainly reflected in：The present invention by increase short-circuit protection circuit and
Sample circuit, bidirectional triode thyristor Q3 has that power-off reaction is fast in the short-circuit protection circuit, and can be opened in Microsecond grade or
The characteristics of shut-off, so as to protect the load on the component and circuit in circuit, avoid causing damages, therefore with power-off speed
The characteristics of fast, and output circuit includes bidirectional triode thyristor TR1, therefore when short circuit or damage occurs in solid-state relay load
When, the meeting bidirectional triode thyristor TR1 in the output circuit is disconnected in time, so as to prolong the service life and reduce cost.
Brief description of the drawings
Fig. 1：Schematic block circuit diagram of the present invention.
Wherein：1- input circuits；2- control circuits；3- zero crossing circuitries；4- output circuits；5- absorbing circuits；6- short circuits are protected
Protection circuit；7- sample circuits.
Embodiment
Below in conjunction with attached drawing, the embodiment of the present invention is described in further detail, so that technical solution of the present invention is more
It should be readily appreciated that and grasp.
As shown in Figure 1, a kind of solid-state relay circuit with short-circuit protection, including input circuit 1, control circuit 2, zero passage
Circuit 3, output circuit 4, absorbing circuit 5, short-circuit protection circuit 6 and sample circuit 7, the input circuit 1 is by interface J1, the 3rd
Resistance R3, second resistance R2, triode T2A, first resistor R1, the 3rd capacitance C3, the second capacitance C2, the electricity of diode D1 and first
Hold C1 compositions, the anode of No. 1 end connection diode D1 of the interface J1, No. 2 end connection 3rd resistor R3 of the interface J1
One end, 3rd resistor R3 other ends connection second resistance R2 one end, the cathode of the diode D1 respectively with the second capacitance
C2 one end is grounded after connecting No. 1 end connection with triode T2A, No. 6 of the second capacitance C2 other end connecting triodes T2A
The second resistance R2 other ends are connected behind end, No. 2 end connection first resistor R1 of the triode T2A, the 3rd capacitance C3 is simultaneously
It is grounded after being associated in first resistor R1 both ends, the first capacitance C1 is connected in parallel on diode D1 both ends；
The control circuit 2 is made of the 4th resistance R4, luminous tube LED, triode T1, the 5th resistance R5 and optocoupler DP2,
No. 1 end the 5th resistance R5 one end of connection of the optocoupler DP2, the cathode of the 4th resistance R4 connection luminous tubes LED, this shines
The anode of pipe LED connects No. 2 ends of optocoupler DP2, the second electricity of base stage connection of the triode T1 with the collector of triode T1
Hinder the R2 other ends, emitter connection first resistor R1 one end of triode T1；
The zero crossing circuitry 3 is made of the 8th resistance R8 and the 11st resistance R11, and described 11st resistance R11 one end connects
No. 4 ends of the optocoupler DP2 are connect, described 8th resistance R8 one end connects No. 3 ends of the optocoupler DP2；
No. 1 end that the output circuit 4 includes bidirectional triode thyristor TR1, the bidirectional triode thyristor TR1 is connected to the optocoupler
Between No. 4 ends of DP2 and described 11st resistance R11 one end, No. 2 end connections the described 11st of the bidirectional triode thyristor TR1
The resistance R11 other ends, No. 3 ends of the bidirectional triode thyristor TR1 connect the 8th resistance R8 other ends；
The absorbing circuit 5 is made of the tenth resistance R10, the 16th capacitance C16 and the first capacitance E1, first capacitance
E1 one end connects the tenth resistance R10 one end, and described tenth resistance R10 one end connects No. 3 ends of the bidirectional triode thyristor TR1,
The first capacitance E1 other ends connect the 16th capacitance C16 one end, and the connection of the 16th capacitance C16 one end is described two-way controllable
No. 2 ends of silicon TR1, the 16th capacitance C16 other ends connect the tenth resistance R10 other ends；
The short-circuit protection circuit 6 by the 4th capacitance C4, the 6th resistance R6, bidirectional triode thyristor Q3, the 13rd resistance R13,
Triode T2B, luminous tube LED1, the 7th resistance, triode T3 and the 9th resistance R9 compositions, described capacitance C4 one end connects respectively
No. 3 ends of bidirectional triode thyristor Q3 and the 6th resistance R6 one end, and capacitance C4 one end is grounded, the 6th resistance R6 other ends connection
The collector of triode T3, the base stage of the triode T3 connect the 9th resistance R9 one end, the emitter connection of triode T3
No. 2 ends of bidirectional triode thyristor Q3, No. 2 ends of the bidirectional triode thyristor Q3 connect the 5th resistance R5 other ends, described two-way
No. 1 end the 13rd resistance R13 one end of connection of silicon-controlled Q3, and the 5 of the 13rd resistance R13 other end connecting triodes T2B
Number end, No. 3 of triode T2B ends connect No. 6 ends of the triode T2A, No. 4 end ground connection of the triode T2A, institute
The cathode for stating luminous tube LED1 is connected between the 13rd resistance R13 and bidirectional triode thyristor Q3, and the anode of luminous tube LED1 connects
Connect the 7th resistance R7 one end ground connection；
The sample circuit 7 is by the 12nd resistance R12, the 5th capacitance C5 and sensor J3, No. 1 end of the sensor J3
Connect the 12nd resistance R12 one end, and the emitter of the 12nd resistance R12 connecting triodes T3, the sensor
No. 2 end ground connection of J3, No. 3 ends of the sensor J3 are connected between the 12nd resistance R12 and the 5th capacitance C5, and the described tenth
The two resistance R12 other ends connect the 5th capacitance C5 one end, and described 5th capacitance C5 one end connects the 9th resistance R9 other ends,
And the 5th the capacitance C5 other ends ground connection.
During a kind of short-circuit protection work of above-mentioned middle solid-state relay circuit with short-circuit protection, when the load of absorbing circuit
Occur electric current it is excessive bear more than output circuit scope when, signal will be fed back in time using the sensor of circuit at this time
Control circuit, at this time control circuit connection short-circuit protection circuit in bidirectional triode thyristor Q3 to the component on output circuit into
Row protection.
Certainly, it the above is only the concrete application example of the present invention, protection scope of the present invention be not limited in any way.It is all
The technical solution formed using equivalent transformation or equivalent replacement, is all fallen within rights protection scope of the present invention.
Claims (1)
1. a kind of solid-state relay circuit with short-circuit protection, including input circuit (1), control circuit (2), zero crossing circuitry (3),
Output circuit (4), absorbing circuit (5), short-circuit protection circuit (6) and sample circuit (7), it is characterised in that the input circuit
(1) by interface J1,3rd resistor R3, second resistance R2, triode T2A, first resistor R1, the 3rd capacitance C3, the second capacitance C2,
Diode D1 and the first capacitance C1 compositions, the anode of No. 1 end connection diode D1 of the interface J1, No. 2 of the interface J1
End connection 3rd resistor R3 one end, described 3rd resistor R3 other ends connection second resistance R2 one end, the diode D1 is just
Pole be connected respectively with second capacitance C2 one end and No. 1 of triode T2A end connection after be grounded, the second capacitance C2 other ends connect
The second resistance R2 other ends are connected after connecing No. 6 ends of triode T2A, No. 2 ends of the triode T2A connect first resistor R1,
The 3rd capacitance C3 is grounded after being connected in parallel on first resistor R1 both ends, and the first capacitance C1 is connected in parallel on diode D1 both ends；
The control circuit (2) is made of the 4th resistance R4, luminous tube LED, triode T1, the 5th resistance R5 and optocoupler DP2, institute
State No. 1 end the 5th resistance R5 one end of connection of optocoupler DP2, the cathode of the 4th resistance R4 connection luminous tubes LED, the luminous tube
The anode of LED connects No. 2 ends of optocoupler DP2, the base stage connection second resistance of the triode T1 with the collector of triode T1
The R2 other ends, emitter connection first resistor R1 one end of triode T1；
The zero crossing circuitry (3) is made of the 8th resistance R8 and the 11st resistance R11, the 11st resistance R11 one end connection
No. 4 ends of the optocoupler DP2, described 8th resistance R8 one end connect No. 3 ends of the optocoupler DP2；
No. 1 end that the output circuit (4) includes bidirectional triode thyristor TR1, the bidirectional triode thyristor TR1 is connected to the optocoupler
Between No. 4 ends of DP2 and described 11st resistance R11 one end, No. 2 end connections the described 11st of the bidirectional triode thyristor TR1
The resistance R11 other ends, No. 3 ends of the bidirectional triode thyristor TR1 connect the 8th resistance R8 other ends；
The absorbing circuit (5) is made of the tenth resistance R10, the 16th capacitance C16 and the first capacitance E1, the first capacitance E1
One end connects the tenth resistance R10 one end, and described tenth resistance R10 one end connects No. 3 ends of the bidirectional triode thyristor TR1, institute
State the first capacitance E1 other ends and connect the 16th capacitance C16 one end, and the 16th capacitance C16 one end connects the bidirectional triode thyristor
No. 2 ends of TR1, the 16th capacitance C16 other ends connect the tenth resistance R10 other ends；
The short-circuit protection circuit (6) is by the 4th capacitance C4, the 6th resistance R6, bidirectional triode thyristor Q3, the 13rd resistance R13, three
Pole pipe T2B, luminous tube LED1, the 7th resistance, triode T3 and the 9th resistance R9 compositions, described capacitance C4 one end connect double respectively
To No. 3 ends of silicon-controlled Q3 and the 6th resistance R6 one end, and capacitance C4 one end is grounded, the 6th resistance R6 other ends connection three
The collector of pole pipe T3, the base stage of the triode T3 connect the 9th resistance R9 one end, and the emitter connection of triode T3 is double
To No. 2 of silicon-controlled Q3 ends, No. 2 ends of the bidirectional triode thyristor Q3 connect the 5th resistance R5 other ends, it is described it is two-way can
Control No. 1 end the 13rd resistance R13 one end of connection of silicon Q3, and No. 5 of the 13rd resistance R13 other end connecting triodes T2B
End, No. 3 ends of the triode T2B connect No. 6 ends of the triode T2A, and No. 4 end ground connection of the triode T2A are described
The cathode of luminous tube LED1 is connected between the 13rd resistance R13 and bidirectional triode thyristor Q3, the anode connection of luminous tube LED1
7th resistance R7 one end is grounded；
The sample circuit (7) is connected by the 12nd resistance R12, the 5th capacitance C5 and sensor J3, No. 1 end of the sensor J3
Meet the 12nd resistance R12 one end, and the emitter of the 12nd resistance R12 connecting triodes T3, the sensor J3
No. 2 end ground connection, No. 3 ends of the sensor J3 are connected between the 12nd resistance R12 and the 5th capacitance C5, the described 12nd
The resistance R12 other ends connect the 5th capacitance C5 one end, and described 5th capacitance C5 one end connects the 9th resistance R9 other ends, and
The 5th capacitance C5 other ends are grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711210612.3A CN107959488B (en) | 2017-11-28 | 2017-11-28 | Solid-state relay circuit with short-circuit protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711210612.3A CN107959488B (en) | 2017-11-28 | 2017-11-28 | Solid-state relay circuit with short-circuit protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107959488A true CN107959488A (en) | 2018-04-24 |
| CN107959488B CN107959488B (en) | 2023-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711210612.3A Active CN107959488B (en) | 2017-11-28 | 2017-11-28 | Solid-state relay circuit with short-circuit protection |
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| Country | Link |
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| CN (1) | CN107959488B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672139A (en) * | 2018-11-29 | 2019-04-23 | 杭州电子科技大学 | 3 phase AC solid relay circuit with short-circuit protection and Width funtion control |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4218718A (en) * | 1978-11-08 | 1980-08-19 | Westinghouse Electric Corp. | Protective relay apparatus |
| CN101034886A (en) * | 2006-03-09 | 2007-09-12 | 展嘉科技股份有限公司 | Electromagnetic coupling solid relay with output feedback |
| CN203225213U (en) * | 2013-03-22 | 2013-10-02 | 深圳市慧锐通智能电器股份有限公司 | A protecting circuit used for protecting contacts of a relay |
| CN104409281A (en) * | 2014-12-12 | 2015-03-11 | 东莞市精诚电能设备有限公司 | Relay-controlled high-current load contact protection circuit |
| CN105826063A (en) * | 2016-05-30 | 2016-08-03 | 东北农业大学 | Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer |
| CN208461795U (en) * | 2017-11-28 | 2019-02-01 | 宁波盈科工业自动化有限公司 | A kind of solid-state relay circuit with short-circuit protection |
-
2017
- 2017-11-28 CN CN201711210612.3A patent/CN107959488B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4218718A (en) * | 1978-11-08 | 1980-08-19 | Westinghouse Electric Corp. | Protective relay apparatus |
| CN101034886A (en) * | 2006-03-09 | 2007-09-12 | 展嘉科技股份有限公司 | Electromagnetic coupling solid relay with output feedback |
| CN203225213U (en) * | 2013-03-22 | 2013-10-02 | 深圳市慧锐通智能电器股份有限公司 | A protecting circuit used for protecting contacts of a relay |
| CN104409281A (en) * | 2014-12-12 | 2015-03-11 | 东莞市精诚电能设备有限公司 | Relay-controlled high-current load contact protection circuit |
| CN105826063A (en) * | 2016-05-30 | 2016-08-03 | 东北农业大学 | Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer |
| CN208461795U (en) * | 2017-11-28 | 2019-02-01 | 宁波盈科工业自动化有限公司 | A kind of solid-state relay circuit with short-circuit protection |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672139A (en) * | 2018-11-29 | 2019-04-23 | 杭州电子科技大学 | 3 phase AC solid relay circuit with short-circuit protection and Width funtion control |
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| Publication number | Publication date |
|---|---|
| CN107959488B (en) | 2023-08-15 |
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