CN207623396U - A kind of alternating voltage isolation detection device - Google Patents
A kind of alternating voltage isolation detection device Download PDFInfo
- Publication number
- CN207623396U CN207623396U CN201721912426.XU CN201721912426U CN207623396U CN 207623396 U CN207623396 U CN 207623396U CN 201721912426 U CN201721912426 U CN 201721912426U CN 207623396 U CN207623396 U CN 207623396U
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- resistance
- circuit
- resistor
- detection device
- alternating voltage
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Abstract
The utility model discloses a kind of alternating voltage isolation detection devices, pass through isolating transformer, rectification is handled after rectification circuit is isolated by alternating current, and lower voltage is obtained by bleeder circuit and carries out resistance sampling circuit, have the points such as isolation safe, simultaneously, pass through 3rd resistor, when there is high-voltage pulse generation at battery both ends, especially battery is inserted into the moment of charger, it will produce pulse, the electric current moment for flowing through 3rd resistor increases, 3rd resistor generates fever and its resistance value is automatically increased, to limit the reduction of electric current, to play the purpose of protection MCU module.The advantages that the utility model alternating voltage isolation detection device has isolation sampling, and circuit is simple and practical, safe and reliable.
Description
Technical field
The utility model is related to alternating voltage sampling techniques, specifically relate to a kind of alternating voltage isolation detection device.
Background technology
In alternating voltage sampling process, alternating voltage will produce peak voltage, larger to sample circuit harm, simultaneously because
Alternating voltage voltage is higher, is put forward higher requirements to electrical safety, and the need pressure value of its input terminal of MCU module is relatively
It is low, and the pressure voltage of itself can not arrive and do height, when have there is instantaneous pressure input more than system when, voltage sample core
It is easy to appear excessive pressure damages for piece, while in order to further protect sampling A/D chip, needing higher cost, and circuit is more multiple
It is miscellaneous.
Invention content
The purpose of the utility model is to overcome prior art problem, a kind of isolation safe, alternating current at low cost are proposed
Isolation detection device is pressed, concrete scheme is as follows,
The utility model provides a kind of alternating voltage isolation detection device, the alternating voltage isolation detection device, packet
Include sequentially connected exchange input module, isolating transformer, rectification circuit, bleeder circuit, resistance sampling circuit；
The input terminal of the exchange input module is connected to ac signal；
The isolating transformer is used to alternating current carrying out isolated buck processing；
The rectification circuit is that full-wave rectifying circuit is used to isolated buck treated alternating current carrying out full-wave rectification shape
At DC voltage；
The DC voltage that the bleeder circuit is used to export the rectification circuit carries out voltage division processing；
The bleeder circuit includes zener diode, the first capacitance, and the cathode of the zener diode is connected to described whole
The positive output end of current circuit, the anode of the zener diode are connected to the anode of the first capacitance, the cathode of first capacitance
Ground connection；
The resistance sampling circuit carries out voltage sample, the both ends of the resistance sampling circuit by way of electric resistance partial pressure
It is respectively connected to the first capacitance both ends.
Further, it is preferable that full-wave rectifying circuit described in the utility model is by the first diode, the second diode, the
The full bridge rectifier that three diodes, the 4th diode are constituted.
Further, it is preferable that the utility model, the resistance sampling circuit is by first resistor and second resistance series connection structure
At；
Input terminal of the one end of the first resistor as the resistance sampling circuit, the other end of the first resistor with
One end of the second resistance is connected the output end as the resistance sampling circuit, another termination of the second resistance
Ground.
Further, it is preferable that the utility model, the alternating voltage isolation detection device further includes 3rd resistor, described
3rd resistor is thermistor, the PTC thermistor with temperature sensitivity, and the resistance value of the PTC thermistor is with PTC heat
The raising of the temperature of quick resistance is increased in phase step type；One end of the 3rd resistor is connected to the output of the resistance sampling circuit
End, the other end of the 3rd resistor are connected to MCU module.
Further, it is preferable that the utility model, the alternating voltage isolation detection device further includes the second capacitance, described
One end of second capacitance is connected to the other end of the 3rd resistor, the other end ground connection of second capacitance.
It should be noted that in the utility model, the first resistor is for single resistance or by multiple resistance connection in series-parallel
It constitutes；The second resistance is single resistance or is made of multiple resistance connection in series-parallel.
The alternating voltage isolation detection device of the utility model, is carried out alternating current by isolating transformer, rectification circuit
Rectification is handled after isolation, and is obtained lower voltage by bleeder circuit and carried out resistance sampling circuit, has the points such as isolation safe,
Meanwhile by 3rd resistor, when there is high-voltage pulse generation at battery both ends, especially battery is inserted into the moment of charger, can produce
Raw pulse, the electric current moment for flowing through 3rd resistor increase, and 3rd resistor generates fever and its resistance value is automatically increased, to limit
The reduction of electric current, to play the purpose of protection MCU module.The utility model alternating voltage isolation detection device, has isolation and adopts
Sample, circuit is simple and practical, it is safe and reliable, the advantages that.
Description of the drawings
Attached drawing described herein is used for providing further understanding invention, constitutes the part of the utility model, this
The illustrative embodiments and their description of utility model do not constitute the improper limit to the utility model for explaining the utility model
It is fixed.In the accompanying drawings：
Fig. 1 is the principle schematic of the alternating voltage isolation detection device of the utility model embodiment 1；
Fig. 2 is the principle schematic of the bleeder circuit and resistance sampling circuit of the utility model embodiment 1；
Fig. 3 is the principle schematic of the bleeder circuit and resistance sampling circuit of the utility model embodiment 2.
Specific implementation mode
In order to keep technical problem to be solved in the utility model, technical solution and advantageous effect clearer, clear, with
Under in conjunction with the accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
Example is applied only to explain the utility model, is not used to limit the utility model.
Embodiment 1
The utility model embodiment 1 provides a kind of alternating voltage isolation detection device, as shown in Fig. 1, including successively
Exchange input module 1, isolating transformer 2, rectification circuit 3, bleeder circuit 4, the resistance sampling circuit 5 of connection；
The input terminal of the exchange input module 1 is connected to ac signal；
The isolating transformer 2 is used to alternating current carrying out isolated buck processing；
The rectification circuit 3 is that full-wave rectifying circuit is used to isolated buck treated alternating current carrying out full-wave rectification shape
At DC voltage；
The DC voltage that the bleeder circuit 4 is used to export the rectification circuit carries out voltage division processing；
The bleeder circuit 4 includes zener diode DZ1, the first capacitance C1, as shown in Fig. 2, the zener diode
The cathode of DZ1 is connected to the positive output end of the rectification circuit 3, and the anode of the zener diode DZ1 is connected to the first capacitance
The anode of C1, the minus earth of the first capacitance C1；
The resistance sampling circuit 5 carries out voltage sample by way of electric resistance partial pressure, and the two of the resistance sampling circuit
End is respectively connected to the first capacitance both ends.
Further, it is preferable that full-wave rectifying circuit described in the utility model is by the first diode, the second diode, the
The full bridge rectifier that three diodes, the 4th diode are constituted.
Further, it is preferable that the utility model, the resistance sampling circuit 5 are gone here and there by first resistor R1 and second resistance R2
Connection is constituted, as shown in Fig. 2；
Input terminal of the one end of the first resistor R1 as the resistance sampling circuit, the first resistor R1's is another
The output end being connected as the resistance sampling circuit 5 with one end of the second resistance R1 is held, the second resistance R2's
The other end is grounded.
Embodiment 2
The utility model embodiment 1 provides a kind of alternating voltage isolation detection device, including sequentially connected exchange is defeated
Enter module 1, isolating transformer 2, rectification circuit 3, bleeder circuit 4, resistance sampling circuit 5, as shown in Figure 1,
Further, it is preferable that the alternating voltage isolation detection device further includes 3rd resistor R3, institute as shown in Fig. 3
It is thermistor to state 3rd resistor R3, the PTC thermistor with temperature sensitivity, the resistance value of the PTC thermistor with
The raising of the temperature of PTC thermistor is increased in phase step type；One end of the 3rd resistor R3 is connected to the resistance sampling electricity
The other end of the output end on road, the 3rd resistor R3 is connected to MCU module.
The input terminal of the exchange input module 1 is connected to ac signal；
The isolating transformer 2 is used to alternating current carrying out isolated buck processing；
The rectification circuit 3 is that full-wave rectifying circuit is used to isolated buck treated alternating current carrying out full-wave rectification shape
At DC voltage；
The DC voltage that the bleeder circuit 4 is used to export the rectification circuit carries out voltage division processing；
The bleeder circuit 4 includes zener diode DZ1, the first capacitance C1, as shown in Fig. 2, the zener diode
The cathode of DZ1 is connected to the positive output end of the rectification circuit 3, and the anode of the zener diode DZ1 is connected to the first capacitance
The anode of C1, the minus earth of the first capacitance C1；
The resistance sampling circuit 5 carries out voltage sample by way of electric resistance partial pressure, and the two of the resistance sampling circuit
End is respectively connected to the first capacitance both ends.
Further, it is preferable that full-wave rectifying circuit described in the utility model is by the first diode, the second diode, the
The full bridge rectifier that three diodes, the 4th diode are constituted.
Further, it is preferable that the utility model, the resistance sampling circuit 5 are gone here and there by first resistor R1 and second resistance R2
Connection is constituted；
Input terminal of the one end of the first resistor R1 as the resistance sampling circuit 5, the first resistor R1's is another
The output end that one end is connected with one end of the second resistance R1 as the resistance sampling circuit 5, the second resistance R2
The other end ground connection.
One end of second resistance R2 is connected the output end as the resistance sampling circuit 5, the second resistance R2's
The other end is grounded.
Further, it is preferable that in the present embodiment, the alternating voltage isolation detection device further includes the second capacitance C2, such as
Shown in attached drawing 3, one end of the second capacitance C2 is connected to the other end of the 3rd resistor R3, and the second capacitance C2's is another
One end is grounded.
It should be noted that in the utility model, the first resistor R1 be single resistance or by multiple resistance strings simultaneously
Connection is constituted；The second resistance R2 is single resistance or is made of multiple resistance connection in series-parallel.
Description above describe the preferred embodiments of the utility model, it is to be understood that the utility model is not limited to
Embodiment is stated, and excluding other embodiments should not be regarded as.By the enlightenment of the utility model, those skilled in the art combine
The change that the known or prior art, knowledge are carried out also should be regarded as within the protection scope of the present utility model.
Claims (6)
1. a kind of alternating voltage isolation detection device, which is characterized in that
Including sequentially connected exchange input module, isolating transformer, rectification circuit, bleeder circuit, resistance sampling circuit；
The input terminal of the exchange input module is connected to ac signal；
The isolating transformer is used to alternating current carrying out isolated buck processing；
The rectification circuit is that full-wave rectifying circuit is used to isolated buck treated alternating current carrying out full-wave rectification to be formed directly
Galvanic electricity pressure；
The DC voltage that the bleeder circuit is used to export the rectification circuit carries out voltage division processing；
The bleeder circuit includes zener diode, the first capacitance, and the cathode of the zener diode is connected to the rectified current
The positive output end on road, the anode of the zener diode are connected to the anode of the first capacitance, the minus earth of first capacitance；
The resistance sampling circuit carries out voltage sample, the both ends difference of the resistance sampling circuit by way of electric resistance partial pressure
It is connected to the first capacitance both ends.
2. alternating voltage isolation detection device according to claim 1, which is characterized in that
The full-wave rectifying circuit is the full-bridge being made of the first diode, the second diode, third diode, the 4th diode
Rectification circuit.
3. alternating voltage isolation detection device according to claim 1, which is characterized in that
The resistance sampling circuit is in series by first resistor and second resistance；
Input terminal of the one end of the first resistor as the resistance sampling circuit, the other end of the first resistor with it is described
One end of second resistance is connected the output end as the resistance sampling circuit, the other end ground connection of the second resistance.
4. alternating voltage isolation detection device according to claim 1, which is characterized in that
The alternating voltage isolation detection device further includes 3rd resistor, and the 3rd resistor is thermistor, has temperature quick
The PTC thermistor of perception, the resistance value of the PTC thermistor is as the raising of the temperature of PTC thermistor is in phase step type increasing
It is high；One end of the 3rd resistor is connected to the output end of the resistance sampling circuit, the other end connection of the 3rd resistor
To MCU module.
5. alternating voltage isolation detection device according to claim 4, which is characterized in that
The alternating voltage isolation detection device further includes the second capacitance, and one end of second capacitance is connected to the third electricity
The other end of resistance, the other end ground connection of second capacitance.
6. alternating voltage isolation detection device according to claim 3, which is characterized in that
The first resistor is single resistance or is made of multiple resistance connection in series-parallel；
The second resistance is single resistance or is made of multiple resistance connection in series-parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721912426.XU CN207623396U (en) | 2017-12-30 | 2017-12-30 | A kind of alternating voltage isolation detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721912426.XU CN207623396U (en) | 2017-12-30 | 2017-12-30 | A kind of alternating voltage isolation detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207623396U true CN207623396U (en) | 2018-07-17 |
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ID=62830725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721912426.XU Expired - Fee Related CN207623396U (en) | 2017-12-30 | 2017-12-30 | A kind of alternating voltage isolation detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207623396U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490606A (en) * | 2018-10-17 | 2019-03-19 | 浙江大华技术股份有限公司 | A kind of isolation voltage detection device |
| CN112834810A (en) * | 2021-01-04 | 2021-05-25 | 基合半导体（宁波）有限公司 | Commercial power voltage detection circuit and detection method applied to flyback isolation power supply |
-
2017
- 2017-12-30 CN CN201721912426.XU patent/CN207623396U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109490606A (en) * | 2018-10-17 | 2019-03-19 | 浙江大华技术股份有限公司 | A kind of isolation voltage detection device |
| CN109490606B (en) * | 2018-10-17 | 2020-12-08 | 浙江大华技术股份有限公司 | Isolation voltage detection device |
| CN112834810A (en) * | 2021-01-04 | 2021-05-25 | 基合半导体（宁波）有限公司 | Commercial power voltage detection circuit and detection method applied to flyback isolation power supply |
| CN112834810B (en) * | 2021-01-04 | 2024-08-09 | 基合半导体（宁波）有限公司 | Commercial power voltage detection circuit and detection method applied to flyback isolated power supply |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180717 Termination date: 20191230 |