CN208623326U - A kind of high_voltage isolation over-voltage detection protection circuit - Google Patents
A kind of high_voltage isolation over-voltage detection protection circuit Download PDFInfo
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- CN208623326U CN208623326U CN201821102738.9U CN201821102738U CN208623326U CN 208623326 U CN208623326 U CN 208623326U CN 201821102738 U CN201821102738 U CN 201821102738U CN 208623326 U CN208623326 U CN 208623326U
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Abstract
The utility model discloses a kind of high_voltage isolation over-voltages to detect protection circuit, including IN foot, one end of IN foot connection resistance, one end of the other end connection resistance R4 of resistance, the cathode of diode D3 and the anode of diode D1, the cathode of the cathode connection diode D2 of diode D1, one end of capacitor C1, one end of resistance R5, one end of capacitor C2 and one end of bidirectional trigger diode D5, the cathode of the cathode connecting diode D4 of diode D2 and the other end of resistance R4, the anode of the cathode connecting diode D4 of diode D3, the other end of capacitor C1, the other end of resistance R5, the other end of capacitor C2 and one end of resistance R6, the other end of resistance R6 connects the input terminal of optocoupler TLP748J with the other end of bidirectional trigger diode D5, optocoupler TLP7 The both ends of the output end connection capacitor C3 of 48J, the both ends of capacitor C3 are parallel with resistance R7.The utility model can prevent high-voltage signal from causing the abnormal problem of other circuits work to the interference on detection one side.
Description
Technical field
The utility model relates to high-voltage AC signal technical fields, it particularly relates to which a kind of high_voltage isolation over-voltage detects
Protect circuit.
Background technique
When detecting, high-voltage signal can interfere on one side detection, so as to cause other for the over-voltage detection of high-voltage signal
Circuit work it is abnormal, for relevant issues, at present still without solution.
Utility model content
For above-mentioned technical problem in the related technology, the utility model proposes a kind of high_voltage isolation over-voltages to detect protection electricity
Road can overcome the above-mentioned deficiency of the prior art.
To realize the above-mentioned technical purpose, the technical solution of the utility model is achieved in that
A kind of high_voltage isolation over-voltage detection protection circuit, including IN foot, one end of the IN foot connection resistance, the electricity
One end, the cathode of diode D3 and the anode of diode D1 of the other end connection resistance R4 of resistance, the cathode of the diode D1
Connect the cathode of diode D2, one end of capacitor C1, one end of resistance R5, one end of capacitor C2 and bidirectional trigger diode D5
One end, the cathode of the cathode connecting diode D4 of the diode D2 and the other end of resistance R4, the anode of the diode D3
Connect the one of the anode of diode D4, the other end of capacitor C1, the other end of resistance R5, the other end of capacitor C2 and resistance R6
End, the other end of the resistance R6 connect the input terminal of optocoupler TLP748J, the light with the other end of bidirectional trigger diode D5
The both ends of the output end connection capacitor C3 of coupling TLP748J, the both ends of the capacitor C3 are parallel with resistance R7.
Further, the resistance includes resistance R1, and one end of the resistance R1 is connect with IN foot, and the resistance R1's is another
One end connect resistance R2 one end, the resistance R2 the other end connection resistance R3 one end, the other end of the resistance R3 with
One end of the resistance R4 connects.
Preferably, the other end ground connection of the resistance R4.
The utility model has the beneficial effects that the utility model is mainly the designed of detection high AC voltage signal, together
Shi Caiyong signal is isolated with detection protection, can prevent high-voltage signal from causing others to the interference on detection one side in this way
The abnormal problem of circuit work.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of circuit diagram of high_voltage isolation over-voltage detection protection circuit according to the utility model embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained, all belongs to
In the range of the utility model protection.
As shown in Figure 1, a kind of high_voltage isolation over-voltage detection protection circuit according to the utility model embodiment, including
IN foot, one end of the IN foot connection resistance, the other end of the resistance connect the cathode of one end of resistance R4, diode D3
With the anode of diode D1, the diode D1 cathode connection the cathode of diode D2, one end of capacitor C1, resistance R5 one
It holds, one end of one end of capacitor C2 and bidirectional trigger diode D5, the cathode of the cathode connecting diode D4 of the diode D2
With the other end of resistance R4, the anode of cathode connecting diode D4 of the diode D3, the other end of capacitor C1, resistance R5
One end of the other end, the other end of capacitor C2 and resistance R6, the other end of the resistance R6 and bidirectional trigger diode D5's is another
One end connects the input terminal of optocoupler TLP748J, the both ends of the output end connection capacitor C3 of the optocoupler TLP748J, the capacitor
The both ends of C3 are parallel with resistance R7.
In one embodiment, the resistance includes resistance R1, and one end of the resistance R1 is connect with IN foot, the electricity
One end of the other end connection resistance R2 of R1 is hindered, the other end of the resistance R2 connects one end of resistance R3, the resistance R3's
The other end is connect with one end of the resistance R4.
In one embodiment, the other end ground connection of the resistance R4.
In order to facilitate the above-mentioned technical proposal for understanding the utility model, below by way of practical new to this in specifically used mode
The above-mentioned technical proposal of type is described in detail.
It is defeated by IN foot according to a kind of high_voltage isolation over-voltage detection protection circuit described in the utility model, including IN foot
The ac high-voltage entered is rectified after the decompression of the sampling resistor of R1, R2 and R3 by D1-D4, when sampled signal voltage reaches one
It by C2 electric discharge is silicon-controlled to D5 is triggered that the conducting of U high_voltage isolation optocoupler is made to control the auxiliary of another side when a setting value > 15V
Circuit trigger action is helped to play the role of detection or circuit protection.The D1 and D2 conducting when high AC voltage input is positive pulse,
D3 and D4 conducting when for negative pulse.The circuit is stable and reliable in work, and over-voltage detection protection can be realized using less component
Purpose.
In conclusion the utility model be mainly detect high AC voltage signal it is designed, while using signal with
Detection protection is isolation, can prevent high-voltage signal from causing other circuits to work not just the interference on detection one side in this way
Normal problem.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (3)
1. a kind of high_voltage isolation over-voltage detection protection circuit, which is characterized in that including IN foot, the one of the IN foot connection resistance
End, one end, the cathode of diode D3 and the anode of diode D1 of the other end connection resistance R4 of the resistance, the diode
The cathode connection cathode of diode D2, one end of capacitor C1, one end of resistance R5, one end of capacitor C2 and the two-way triggering two of D1
One end of pole pipe D5, the cathode of the cathode connecting diode D4 of the diode D2 and the other end of resistance R4, the diode
The anode of cathode connecting diode D4 of D3, the other end of capacitor C1, the other end of resistance R5, capacitor C2 the other end and resistance
The other end of one end of R6, the resistance R6 connects the input terminal of optocoupler TLP748J with the other end of bidirectional trigger diode D5,
The both ends of the output end connection capacitor C3 of the optocoupler TLP748J, the both ends of the capacitor C3 are parallel with resistance R7.
2. a kind of high_voltage isolation over-voltage detection protection circuit according to claim 1, which is characterized in that the resistance includes
Resistance R1, one end of the resistance R1 are connect with IN foot, one end of the other end connection resistance R2 of the resistance R1, the resistance
One end of the other end connection resistance R3 of R2, the other end of the resistance R3 are connect with one end of the resistance R4.
3. a kind of high_voltage isolation over-voltage detection protection circuit according to claim 2, which is characterized in that the resistance R4's
Other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821102738.9U CN208623326U (en) | 2018-07-12 | 2018-07-12 | A kind of high_voltage isolation over-voltage detection protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821102738.9U CN208623326U (en) | 2018-07-12 | 2018-07-12 | A kind of high_voltage isolation over-voltage detection protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208623326U true CN208623326U (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821102738.9U Active CN208623326U (en) | 2018-07-12 | 2018-07-12 | A kind of high_voltage isolation over-voltage detection protection circuit |
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| CN (1) | CN208623326U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426871A (en) * | 2020-04-20 | 2020-07-17 | 小熊电器股份有限公司 | Overvoltage indicating circuit, overvoltage indicating method and household appliance |
-
2018
- 2018-07-12 CN CN201821102738.9U patent/CN208623326U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426871A (en) * | 2020-04-20 | 2020-07-17 | 小熊电器股份有限公司 | Overvoltage indicating circuit, overvoltage indicating method and household appliance |
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