CN206649078U - A kind of electric resistance partial pressure type voltage over zero detects circuit - Google Patents
A kind of electric resistance partial pressure type voltage over zero detects circuit Download PDFInfo
- Publication number
- CN206649078U CN206649078U CN201720415374.9U CN201720415374U CN206649078U CN 206649078 U CN206649078 U CN 206649078U CN 201720415374 U CN201720415374 U CN 201720415374U CN 206649078 U CN206649078 U CN 206649078U
- Authority
- CN
- China
- Prior art keywords
- resistance
- diode
- resistor
- electric capacity
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a kind of electric resistance partial pressure type voltage over zero to detect circuit, including comparator chip U1, NOT gate N1, the first diode D1, the second diode D2, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the first electric capacity C1 and the second electric capacity C2, wherein, the comparator chip U1 is comparator/operational amplifier LM393.Compared with the zero crossing voltage detecting circuit of prior art photoelectric coupling type, the circuit structure of the utility model electric resistance partial pressure type voltage over zero detection circuit is simple, this detection mode has high respond simultaneously, crossover point signal can accurately be measured, the advantages that AC signal scope is big is detected, is suitable for various application scenarios.
Description
Technical field
It the utility model is related to alternating current zero-point voltage detection field, more particularly to a kind of electric resistance partial pressure type voltage over zero
Detect circuit.
Background technology
In the prior art, alternating current zero-point voltage detection generally use photoelectrical coupler realizes that photoelectrical coupler can be effective
Isolate power circuit and control circuit, using the voltage over zero detection circuit of photoelectrical coupler can be effectively isolated power circuit and
Control circuit, referring to Fig. 1, it show the voltage over zero sample circuit schematic diagram of photoelectric coupling type.Inside photoelectrical coupler
The backward voltage for inputting light emitting diode is 4V (at 25 DEG C of operating temperature), in order to prevent that input voltage is anti-by photoelectrical coupler
To breakdown, model 1N4001 diode D1 and D2 are added in circuit, its reverse pressure voltage is 1000V, in line voltage
In the range of use enough.Photoelectrical coupler conducting can not be triggered during input voltage zero crossing immediately, but first turns on outside two poles
Input diode inside pipe and photoelectrical coupler, its conducting voltage is 0.62V respectively (under 25 degrees Celsius, electric current is less than 0.1A)
And 1.15V.When inputting line voltage in positive half cycle, photoelectrical coupler U2 output triode conducting, photoelectrical coupler
U3 output triode is closed；When line voltage is in negative half period, photoelectrical coupler U2 output triode is closed, photoelectric coupling
Device U3 output triode conducting.
Although can isolate power circuit and control detection circuit by photoelectrical coupler, it has shortcomings.Photoelectricity
The ON time of coupler is longer, and needs first to turn on external diode and photoelectrical coupler internal body diodes, so as to cause
The crossover point signal and actual signal of sampling have big deviation.Make photoelectrical coupler fully on, it is also necessary to enough conductings
Electric current, representative value are about 10mA, can so cause current-limiting resistance to generate heat, and after photoelectrical coupler conducting, its conducting electric current is in current limliting
Voltage is produced on resistance, there can be larger deviation in corresponding virtual voltage.It is actual due to the current limit of photoelectrical coupler
The amplitude range for detecting input exchange signal is narrow.
Therefore for drawbacks described above present in currently available technology, it is necessary to be studied in fact, to provide a kind of scheme,
Solves defect present in prior art.
Utility model content
In order to overcome the shortcomings of the prior art, detect electricity it is necessory to provide a kind of electric resistance partial pressure type voltage over zero
Road, the accurate detection of crossover point signal is realized with a kind of simple circuit structure.
In order to overcome technical problem existing for prior art, the technical solution of the utility model is as follows：
A kind of electric resistance partial pressure type voltage over zero detects circuit, including comparator chip U1, NOT gate N1, the first diode
D1, the second diode D2, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th electricity
R6, the first electric capacity C1 and the second electric capacity C2 are hindered, wherein, the comparator chip U1 is comparator/operational amplifier LM393；
One end of the first resistor R1 and one end of the second resistance R2 are connected with exchanging the both ends of input respectively,
The other end of the first resistor R1 is connected with one end of the 3rd resistor R3 and one end of the 5th resistance R5, described
The 3rd resistor R3 other end and one end of the first electric capacity C1, the negative terminal of the first diode D1, the two or two pole
Pipe D2 anode, the second pin of the comparator chip U1 are connected；The other end of the second resistance R2 and the described 4th
Resistance R4 one end, the other end of the first electric capacity C1, the anode of the first diode D1, the second diode D2
Negative terminal, the 3rd pin of the comparator chip U1 are connected；The 8th pin of the comparator chip U1 and the described second electricity
The one end for holding C2 is connected and is connected jointly with power supply positive output end；The other end of the 5th resistance R5, the 4th electricity
Hinder the R4 other end, the other end of the second electric capacity C2, the comparator chip U1 the 4th pin jointly with GND ground terminal phases
Connection；The first pin of the comparator chip U1 is connected with one end of the 6th resistance R6, the input of the NOT gate N1
Connect, the output end of the NOT gate N1 is connected with late-class circuit, the other end and the power supply positive output end phase of the 6th resistance R6
Connection.
Preferably, the NOT gate N1 uses CMOS inverter chip SN74HC04N.
Compared with the zero crossing voltage detecting circuit of prior art photoelectric coupling type, the utility model electric resistance partial pressure type
The circuit structure of voltage over zero detection circuit is simple, while this detection mode has high response, can accurately measure zero crossing
Signal, the advantages that AC signal scope is big is detected, is suitable for various application scenarios.
Brief description of the drawings
Fig. 1 is the voltage over zero sample circuit schematic diagram of prior art photoelectric coupling type.
Fig. 2 is the circuit theory diagrams that the utility model electric resistance partial pressure type voltage over zero detects circuit.
Specific examples below will further illustrate the utility model with reference to above-mentioned accompanying drawing.
Embodiment
Technical scheme provided by the utility model is described further below with reference to accompanying drawing.
Referring to Fig. 2, the circuit for showing the voltage over zero detection circuit of electric resistance partial pressure type provided by the utility model is former
Reason figure, including comparator chip U1, NOT gate N1, the first diode D1, the second diode D2, first resistor R1, second resistance R2,
3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the first electric capacity C1 and the second electric capacity C2, wherein, compare
Device chip U1 is comparator/operational amplifier LM393；
First resistor R1 one end and second resistance R2 one end are connected with exchanging the both ends of input respectively, first resistor
The R1 other end is connected with 3rd resistor R3 one end and the 5th resistance R5 one end, the 3rd resistor R3 other end and first
Electric capacity C1 one end, the first diode D1 negative terminal, the second diode D2 anode, comparator chip U1 second pin are connected
Connect；The second resistance R2 other end and the 4th resistance R4 one end, the first electric capacity C1 other end, the first diode D1 are just
End, the second diode D2 negative terminal, comparator chip U1 the 3rd pin are connected；Comparator chip U1 the 8th pin and
Two electric capacity C2 one end is connected and is connected jointly with power supply positive output end；The 5th resistance R5 other end, the 4th resistance R4
The other end, the second electric capacity C2 other end, comparator chip U1 the 4th pin be connected with GND ground terminals jointly；Comparator
Chip U1 the first pin is connected with the 6th resistance R6 one end, NOT gate N1 input, NOT gate N1 output end and rear class
Circuit is connected, and the 6th resistance R6 other end is connected with power supply positive output end.
In foregoing circuit, wherein R1 and R2 are current-limiting resistance, and resistance R5 and R4 resistance are smaller with respect to R1 and R2, with electricity
Hinder R1 and R2 and form bleeder circuit, and fraction voltage can be assigned to.If the voltage peak that R5 and R4 are assigned to is UR, civil power input
Voltage max is Uimax, wherein R1 and R2 resistance value is that 100k Ω, R5 and R4 resistance value are 4.7k Ω, then
Resistance R3 and electric capacity C1 form single order RC low-pass filter circuits, the interference signal after cut-off frequency point can with-
The velocity attenuation of the frequencys multiplication of 20DB/ ten.Wherein R3 is 4.7k Ω, C1 100pF, and its cut-off frequency is：
Diode D1 and D2 effect are clampers, can protect the input pin of comparator, use the two of model 1N4148
Pole pipe, the existing electric resistance partial pressure before diode, therefore here need not very high withstand voltage diode.U1 is comparator/operational amplifier
LM393, its output need to connect pull-up resistor, and so when lower half on AC signal replaces, comparator chip U1's is defeated
Go out level change occurs, so as to accurately detect crossover point signal.One is also associated with comparator chip U1 output end
NOT gate N1, so as to lift the output driving ability of circuit, contribute to the processing of late-class circuit.In voltage type voltage over zero
Circuit is detected, it is necessary to carry out common ground connection to electric resistance partial pressure side and comparator side, prevents circuit because can not be just without reference ground
Often work.Meanwhile NOT gate N1 also with comparator chip U1 common-batteries source altogether.Examined relative to the zero crossing voltage of photoelectric coupling type
The advantages of slowdown monitoring circuit, detection mode of the present utility model have high response, and error is small, and detection AC signal scope is big.Resistance point
Die mould detection circuit structure is simple, can accurately measure crossover point signal, be suitable for various application scenarios.
In a preferred embodiment, NOT gate N1 uses CMOS inverter chip SN74HC04N.
The explanation of above example is only intended to help and understands method and its core concept of the present utility model.It should refer to
Go out, for those skilled in the art, can also be to this on the premise of the utility model principle is not departed from
Utility model carries out some improvement and modification, and these are improved and modification also falls into the protection domain of the utility model claims
It is interior.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (2)
1. a kind of electric resistance partial pressure type voltage over zero detects circuit, it is characterised in that including comparator chip U1, NOT gate N1, the
One diode D1, the second diode D2, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the 6th resistance R6, the first electric capacity C1 and the second electric capacity C2, wherein, the comparator chip U1 is comparator/operational amplifier
LM393；
One end of the first resistor R1 and one end of the second resistance R2 are connected with exchanging the both ends of input respectively, described
The first resistor R1 other end is connected with one end of the 3rd resistor R3 and one end of the 5th resistance R5, and the described 3rd
The resistance R3 other end and one end of the first electric capacity C1, the negative terminal of the first diode D1, the second diode D2
Anode, the second pin of the comparator chip U1 is connected；The other end of the second resistance R2 and the 4th resistance
R4 one end, the other end of the first electric capacity C1, the anode of the first diode D1, the second diode D2 it is negative
End, the 3rd pin of the comparator chip U1 are connected；The 8th pin of the comparator chip U1 and second electric capacity
C2 one end is connected and is connected jointly with power supply positive output end；The other end, the 4th resistance of the 5th resistance R5
The R4 other end, the other end of the second electric capacity C2, the 4th pin of the comparator chip U1 are connected with GND ground terminals jointly
Connect；The first pin of the comparator chip U1 is connected with one end of the 6th resistance R6, the input of the NOT gate N1,
The output end of the NOT gate N1 is connected with late-class circuit, and the other end of the 6th resistance R6 is connected with power supply positive output end
Connect.
2. electric resistance partial pressure type voltage over zero according to claim 1 detects circuit, it is characterised in that the NOT gate N1 is adopted
With CMOS inverter chip SN74HC04N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720415374.9U CN206649078U (en) | 2017-04-19 | 2017-04-19 | A kind of electric resistance partial pressure type voltage over zero detects circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720415374.9U CN206649078U (en) | 2017-04-19 | 2017-04-19 | A kind of electric resistance partial pressure type voltage over zero detects circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206649078U true CN206649078U (en) | 2017-11-17 |
Family
ID=60276953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720415374.9U Active CN206649078U (en) | 2017-04-19 | 2017-04-19 | A kind of electric resistance partial pressure type voltage over zero detects circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206649078U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281971A (en) * | 2018-01-23 | 2018-07-13 | 深圳市力高科技有限公司 | A kind of voltage zero-crossing detection circuit for reactive power compensator fling-cut switch |
| CN108508259A (en) * | 2018-03-08 | 2018-09-07 | 上海广为美线电源电器有限公司 | Electric main synchronization signal detection circuit |
| CN109391210A (en) * | 2018-11-13 | 2019-02-26 | 南京信息工程大学 | A kind of low-voltage electromobile switched reluctance machines isolation drive system |
| CN109917177A (en) * | 2019-04-12 | 2019-06-21 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of jamproof zero cross detection circuit and detection method |
| CN110133359A (en) * | 2019-05-23 | 2019-08-16 | 广东美的制冷设备有限公司 | Air conditioner zero cross detection circuit, electric control gear and air conditioner |
| CN113518486A (en) * | 2021-05-10 | 2021-10-19 | 江苏力行电力电子科技有限公司 | Illumination control system and method based on environment feedback |
-
2017
- 2017-04-19 CN CN201720415374.9U patent/CN206649078U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281971A (en) * | 2018-01-23 | 2018-07-13 | 深圳市力高科技有限公司 | A kind of voltage zero-crossing detection circuit for reactive power compensator fling-cut switch |
| CN108508259A (en) * | 2018-03-08 | 2018-09-07 | 上海广为美线电源电器有限公司 | Electric main synchronization signal detection circuit |
| CN109391210A (en) * | 2018-11-13 | 2019-02-26 | 南京信息工程大学 | A kind of low-voltage electromobile switched reluctance machines isolation drive system |
| CN109917177A (en) * | 2019-04-12 | 2019-06-21 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of jamproof zero cross detection circuit and detection method |
| CN110133359A (en) * | 2019-05-23 | 2019-08-16 | 广东美的制冷设备有限公司 | Air conditioner zero cross detection circuit, electric control gear and air conditioner |
| CN110133359B (en) * | 2019-05-23 | 2021-08-13 | 广东美的制冷设备有限公司 | Air conditioner zero-crossing detection circuit, electric control device and air conditioner |
| CN113518486A (en) * | 2021-05-10 | 2021-10-19 | 江苏力行电力电子科技有限公司 | Illumination control system and method based on environment feedback |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206649078U (en) | A kind of electric resistance partial pressure type voltage over zero detects circuit | |
| CN203324419U (en) | Direct-current power insulation detection device | |
| CN204065213U (en) | Zero sequence current mutual inductor break detection circuit and residual current detection circuit | |
| CN104269829B (en) | Self-adaptive threshold value short-circuit protection circuit | |
| CN206321689U (en) | A kind of voltage isolation circuit and high_voltage isolation detect circuit | |
| CN206074693U (en) | Insulating resistor detecting circuit | |
| CN106768457A (en) | A kind of thermistor temp Acquisition Circuit and its self checking method | |
| CN206362890U (en) | Electronic power switch device junction temperature on-Line Monitor Device, detection circuit | |
| CN104181434A (en) | Direct current power supply insulation detection device and detection method | |
| CN203759112U (en) | High-frequency current detection circuit | |
| CN206211512U (en) | A kind of thermal-shutdown circuit and charging pile | |
| CN204269735U (en) | A kind of insulation failure detection circuit of electrokinetic cell bag | |
| CN106383264A (en) | Anti-interference high-precision zero-crossing detection method | |
| CN204228101U (en) | Two parallel probe formula rain water depth on road surface tester | |
| CN206193083U (en) | Detection circuitry of three phase motor phase voltage | |
| CN105223533A (en) | A kind of superhigh precision responds DC current prover circuit fast | |
| CN204188299U (en) | Multichannel IGBT inner NTC high temperature real-time detection circuit | |
| CN208902788U (en) | A kind of current detection circuit of switching circuit | |
| CN207923238U (en) | A kind of liquid level detection device of automobile cooling | |
| CN203519712U (en) | Battery voltage acquisition system | |
| CN205920126U (en) | Detection apparatus for real -time supervision fan speed | |
| CN105842527B (en) | Anti-interference high-precision zero crossing detection device | |
| CN205958641U (en) | Current detection circuit | |
| CN104897949B (en) | Voltage detecting circuit | |
| CN208537614U (en) | Current detection means |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210918 Address after: 311800 111 g TA TA Road, Tao Zhu street, Zhuji, Shaoxing, Zhejiang. Patentee after: Zhejiang HUAQUAN Microelectronics Co.,Ltd. Address before: 311800 111 g TA TA Road, Tao Zhu street, Zhuji, Shaoxing, Zhejiang. Patentee before: ZHEJIANG ZHUJI QICHUANG ELECTRONIC SCIENCE & TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |