CN104901280B - A kind of intelligent protection circuit - Google Patents
A kind of intelligent protection circuit Download PDFInfo
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- CN104901280B CN104901280B CN201510311685.6A CN201510311685A CN104901280B CN 104901280 B CN104901280 B CN 104901280B CN 201510311685 A CN201510311685 A CN 201510311685A CN 104901280 B CN104901280 B CN 104901280B
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Abstract
The invention discloses a kind of intelligent protection circuits; including transformer W, chip IC 1, resistance R1 and diode D1; one end connection capacitance C4, a main electrode of bidirectional thyristor Q1 and the 220V alternating currents of the winding N1 of the transformer W; the other end connection load RL of the winding N1 of transformer W, the both ends of the winding N2 of transformer W connect the first port of rectifier bridge T and the third port of rectifier bridge T respectively.Intelligent protection circuit of the present invention is not only simple in structure, component is few, low manufacture cost; and circuit also has the function of overvoltage protection, under-voltage protection and soft start; power network fluctuation is effectively prevented to the influence with electric loading, therefore circuit has the advantages that vdiverse in function, service life is long and simple and practical.
Description
Technical field
The present invention relates to a kind of protection circuits, are specifically a kind of intelligent protection circuit.
Background technology
As the improvement of people's living standards, various household electrical appliance progress into the family of people, can say electric energy
Through into the most common energy in for people's lives, but electric energy is often present with power network fluctuation during being transmitted in power grid,
So that the 220V voltages stablized originally are present with overvoltage, under-voltage situation, the normal production and living of people are not only influenced, and
And can also serious reduction electric loading service life.
The content of the invention
It is an object of the invention to provide a kind of intelligent protection circuit simple in structure, vdiverse in function, to solve the above-mentioned back of the body
The problem of being proposed in scape technology.
To achieve the above object, the present invention provides following technical solution：
A kind of intelligent protection circuit, including transformer W, chip IC 1, resistance R1 and diode D1, the transformer W around
One end connection capacitance C4, a main electrode of bidirectional thyristor Q1 and the 220V alternating currents of group N1, the winding N1's of transformer W is another
One end connection load RL, the both ends of the winding N2 of transformer W connect respectively rectifier bridge T first port and rectifier bridge T the 3rd
Port, the second port connection resistance R1 of rectifier bridge T, resistance R2, resistance R3, resistance R8, capacitance C1, chip IC 1 pin 4,
The pin 8 of chip IC 1 and the pin 1 of chip IC 2, the anode of the other end connection diode D1 of resistance R1, the moon of diode D1
The other end, capacitance C3, capacitance C5, capacitance C6, resistance R5, resistance R6, resistance R7, resistance R10, the diode of pole connection capacitance C1
The anode of D2, the 4th port of rectifier bridge T, the pin 1 of chip IC 1 and the pin 4 of chip IC 2, the other end connection of resistance R2
The pin 6 of resistance R4, the other end of resistance R5 and chip IC 1, the other end, the resistance R6 of the other end connection resistance R4 of resistance R3
The other end and chip IC 1 pin 2, the pin 5 of chip IC 1 connects the other end of capacitance C6, and the pin 3 of chip IC 1 connects
The other end, the other end, the cathode and diode of diode D2 of capacitance C3 of the other end connection resistance R7 of capacitance C2, capacitance C2
The cathode of D3, the pin 5 of the anode connection chip IC 2 of diode D3, the other end of the other end connection capacitance C5 of resistance R8, core
The pin 2 of piece IC2 connects resistance R9, the anode of the other end connection diode D4 of resistance R9, the cathode connection pair of diode D4
To the control pole of thyristor Q1, the other end of the other end connection resistance R10 of capacitance C1, another main electricity of bidirectional thyristor Q1
The other end of pole connection load RL.
Preferred embodiment as the present invention：The model NE555 of the chip IC 1, the model TWH8778 of chip IC 2.
Preferred embodiment as the present invention：The diode D4 is light emitting diode.
Compared with prior art, the beneficial effects of the invention are as follows：Intelligent protection circuit of the present invention is not only simple in structure, first device
Part is few, low manufacture cost, and circuit also has the function of overvoltage protection, under-voltage protection and soft start, effectively prevents electricity
Net fluctuation is to the influence with electric loading, therefore circuit has the advantages that vdiverse in function, service life is long and simple and practical.
Description of the drawings
Fig. 1 is the circuit diagram of intelligent protection circuit.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
It is described including transformer W, chip IC 1, resistance R1 and diode D1 referring to Fig. 1, a kind of intelligent protection circuit
One end connection capacitance C4, a main electrode of bidirectional thyristor Q1 and the 220V alternating currents of the winding N1 of transformer W, transformer W
Winding N1 other end connection load RL, the both ends of the winding N2 of transformer W connect the first port of rectifier bridge T and whole respectively
Flow the third port of bridge T, second port connection resistance R1, resistance R2, resistance R3, resistance R8, capacitance C1, the chip of rectifier bridge T
The pin 1 of the pin 4 of IC1, the pin 8 of chip IC 1 and chip IC 2, the anode of the other end connection diode D1 of resistance R1, two
The other end, capacitance C3, capacitance C5, capacitance C6, resistance R5, resistance R6, resistance R7, the resistance of the cathode connection capacitance C1 of pole pipe D1
R10, the anode of diode D2, the 4th port of rectifier bridge T, the pin 1 of chip IC 1 and the pin 4 of chip IC 2, resistance R2's
Other end connection resistance R4, the other end of resistance R5 and the pin 6 of chip IC 1, the other end connection resistance R4's of resistance R3 is another
The pin 2 of one end, the other end of resistance R6 and chip IC 1, the pin 5 of chip IC 1 connect the other end of capacitance C6, chip IC 1
Pin 3 connect capacitance C2, the other end of other end connection resistance R7 of capacitance C2, the other end of capacitance C3, diode D2
The cathode of cathode and diode D3, the pin 5 of the anode connection chip IC 2 of diode D3, the other end connection capacitance of resistance R8
The other end of C5, the pin 2 of chip IC 2 connect resistance R9, the anode of the other end connection diode D4 of resistance R9, diode D4
Cathode connection bidirectional thyristor Q1 control pole, the other end of the other end connection resistance R10 of capacitance C1, bidirectional thyristor Q1
Another main electrode connection load RL the other end.
The model NE555 of chip IC 1, the model TWH8778 of chip IC 2.Diode D4 is light emitting diode.
The present invention operation principle be：During normal power supply, 220V alternating currents by transformer W decompressions, rectifier bridge T rectifications,
Become stable DC after capacitance C1 filtering and give protection circuit power supply, from the pulsation electricity of the end second port output of rectifier bridge T
Pressure is compared with reference voltage so that the pulse voltage of the 3 feet output rectangle of chip IC 1, this voltage make the conducting output of chip IC 2 high
Level, is added in the control pole of bidirectional thyristor Q1 after resistance R9 and light emitting diode D4, and diode D4 shines so that two-way
Thyristor Q1 is turned on, and load RL obtains electric work, and when network voltage is more than 250VA or less than 170V, chip IC 1 is in protection shape
State is disconnected without output, 2 internal circuit of chip IC, bidirectional thyristor Q1 disconnecting circuits, and load RL is disconnected, when the voltage in power grid returns
It is multiple in stable voltage range when, because of capacitance C4 discharge offs, it is therefore desirable to which chip IC 2 can just be led after capacitance C4 is fully charged
It is logical, therefore avoid circuit and be switched on and off the service life reduction caused by load repeatedly.
Claims (1)
1. a kind of intelligent protection circuit, including transformer W, chip IC 1, resistance R1 and diode D1, which is characterized in that the change
One end connection capacitance C4, a main electrode of bidirectional thyristor Q1 and the 220V alternating currents of the winding N1 of depressor W, transformer W's
The other end connection load RL of winding N1, the both ends of the winding N2 of transformer W connect first port and the rectification of rectifier bridge T respectively
The third port of bridge T, the second port connection resistance R1 of rectifier bridge T, resistance R2, resistance R3, resistance R8, capacitance C1, chip IC 1
Pin 4, the pin 8 of chip IC 1 and the pin 1 of chip IC 2, the anode of the other end connection diode D1 of resistance R1, two poles
The other end, capacitance C3, capacitance C5, capacitance C6, resistance R5, resistance R6, resistance R7, the resistance of the cathode connection capacitance C1 of pipe D1
R10, the anode of diode D2, the 4th port of rectifier bridge T, the pin 1 of chip IC 1 and the pin 4 of chip IC 2, resistance R2's
Other end connection resistance R4, the other end of resistance R5 and the pin 6 of chip IC 1, the other end connection resistance R4's of resistance R3 is another
The pin 2 of one end, the other end of resistance R6 and chip IC 1, the pin 5 of chip IC 1 connect the other end of capacitance C6, chip IC 1
Pin 3 connect capacitance C2, the other end of other end connection resistance R7 of capacitance C2, the other end of capacitance C3, diode D2
The cathode of cathode and diode D3, the pin 5 of the anode connection chip IC 2 of diode D3, the other end connection capacitance of resistance R8
The other end of C5, the pin 2 of chip IC 2 connect resistance R9, the anode of the other end connection diode D4 of resistance R9, diode D4
Cathode connection bidirectional thyristor Q1 control pole, the other end of the other end connection resistance R10 of capacitance C1, bidirectional thyristor Q1
Another main electrode connection load RL the other end, the model NE555 of the chip IC 1, the model of the chip IC 2
TWH8778, the diode D4 are light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510311685.6A CN104901280B (en) | 2015-06-09 | 2015-06-09 | A kind of intelligent protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510311685.6A CN104901280B (en) | 2015-06-09 | 2015-06-09 | A kind of intelligent protection circuit |
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| Publication Number | Publication Date |
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| CN104901280A CN104901280A (en) | 2015-09-09 |
| CN104901280B true CN104901280B (en) | 2018-06-05 |
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| CN201510311685.6A Active CN104901280B (en) | 2015-06-09 | 2015-06-09 | A kind of intelligent protection circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105163456A (en) * | 2015-09-29 | 2015-12-16 | 黄超发 | Constant-current driving power failure self-delay LED lighting lamp |
| CN106703671A (en) * | 2016-11-29 | 2017-05-24 | 廖婕 | Clean and sanitary electric window |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204068197U (en) * | 2014-09-17 | 2014-12-31 | 国家电网公司 | The under-voltage overvoltage automatic protection circuit of a kind of civil power |
| CN204243716U (en) * | 2014-09-30 | 2015-04-01 | 国家电网公司 | Electric device fault secure circuit |
| CN104682341A (en) * | 2013-11-28 | 2015-06-03 | 海洋王（东莞）照明科技有限公司 | Over-voltage/low-voltage protective circuit |
| CN204794037U (en) * | 2015-06-09 | 2015-11-18 | 廖婕 | Intelligence protection circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040070904A1 (en) * | 2002-10-11 | 2004-04-15 | Carr Sheldon P. | Over-voltage protection arrangement for a low voltage power supply |
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2015
- 2015-06-09 CN CN201510311685.6A patent/CN104901280B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682341A (en) * | 2013-11-28 | 2015-06-03 | 海洋王（东莞）照明科技有限公司 | Over-voltage/low-voltage protective circuit |
| CN204068197U (en) * | 2014-09-17 | 2014-12-31 | 国家电网公司 | The under-voltage overvoltage automatic protection circuit of a kind of civil power |
| CN204243716U (en) * | 2014-09-30 | 2015-04-01 | 国家电网公司 | Electric device fault secure circuit |
| CN204794037U (en) * | 2015-06-09 | 2015-11-18 | 廖婕 | Intelligence protection circuit |
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| CN104901280A (en) | 2015-09-09 |
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Inventor after: Jiang Shijun Inventor after: Li Xiulian Inventor before: Liao Jie |
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Effective date of registration: 20180428 Address after: 422002 Hunan Industrial Park, Shaoyang Economic Development Zone, Hunan Applicant after: Hunan small fast intelligent electronic technology Co., Ltd. Address before: 537499 45-11 North Road two, Beiliu, Yulin, the Guangxi Zhuang Autonomous Region Applicant before: Liao Jie |
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