CN209417136U - A kind of measurement transient voltage circuit - Google Patents
A kind of measurement transient voltage circuit Download PDFInfo
- Publication number
- CN209417136U CN209417136U CN201920063391.XU CN201920063391U CN209417136U CN 209417136 U CN209417136 U CN 209417136U CN 201920063391 U CN201920063391 U CN 201920063391U CN 209417136 U CN209417136 U CN 209417136U
- Authority
- CN
- China
- Prior art keywords
- voltage
- capacitor
- resistance
- circuit
- resistor
- 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 measurement transient voltage circuit, the circuit includes proportion divider circuit, voltage hold circuit, output display module, proportion divider circuit receives transient voltage signals, and multiple output voltages are generated based on the received transient voltage signals of institute, voltage hold circuit receives multiple output voltages, voltage hold circuit is based on multiple output voltages and generates a display signal, and voltage hold circuit output displays signal to output display module.The measuring circuit of the utility model is preferably solved the problems, such as the measurement of field device transient voltage, ensure that accuracy, the operability of discharge protector intelligent analysis system using the principle of simple resistance capacitance proportion divider, capacitive energy storage.
Description
[technical field]
The utility model relates to power test technical fields, specifically, being related to a kind of measurement transient voltage circuit.
[background technique]
Currently, requiring accurately to measure transient voltage, for example, to breakdown in many power test equipment
The intellectual analysis of protector, it is necessary to accurately test very much the important parameters such as protector disruptive discharge voltage, breakdown current.
However, common transient voltage measuring device or use oscilloscope apparatus interpretation, although intuitively the device is complicated,
It is inconvenient, or measured using professional high-speed sampling chip circuit, but that there is also routes is complicated, cost is high, the testing time is long
The shortcomings that.
[utility model content]
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of measurement transient voltage circuit,
The circuit preferably solves field device transient voltage using the principle of simple resistance capacitance proportion divider, capacitive energy storage
Measurement problem, ensure that accuracy, the operability of discharge protector intelligent analysis system.
To solve the above-mentioned problems, technical solution used by the utility model is as follows:
A kind of measurement transient voltage circuit comprising proportion divider circuit, voltage hold circuit, output display module, institute
It states proportion divider circuit and receives transient voltage signals, and generate multiple output electricity based on the received transient voltage signals of institute
Pressure, the voltage hold circuit receive multiple output voltages, and the voltage hold circuit is based on multiple output voltages
A display signal is generated, displays signal to the output display module described in the voltage hold circuit output；The ratio point
Volt circuit includes the first resistor being sequentially connected in series, second resistance, 3rd resistor, the 4th resistance, and the proportion divider circuit also wraps
The first capacitor being sequentially connected in series, the second capacitor, third capacitor, the 4th capacitor are included, the first resistor and the first capacitor are simultaneously
Connection, the second resistance is in parallel with second capacitor, and the 3rd resistor is in parallel with the third capacitor, the 4th resistance
It is in parallel with the 4th capacitor.
Further embodiment is that the voltage hold circuit includes that voltage input end, sampling holder and voltage compare
Device, the non-inverting input terminal of the voltage comparator, the third pin of the sampling holder are electric with the voltage input end respectively
Connection, the 8th pin of the sampling holder are electrically connected with the output end of the voltage comparator, the voltage comparator
Inverting input terminal, the sampling holder the 5th pin respectively with it is described output display module input terminal be electrically connected.
Further scheme is, the voltage hold circuit further includes pull-up resistor, switching tube, the pull-up resistor
First end is electrically connected with the output end of the voltage comparator, and the 6th of the collector of the switching tube and the sampling holder the
Pin electrical connection, the emitter of the switching tube are electrically connected with the output end of the voltage comparator.
Further scheme is the first resistor, the second resistance, the 3rd resistor, the 4th resistance
Resistance value be respectively 20M, 10M, 1M and 500K.
Further scheme is the first capacitor, second capacitor, the third capacitor, the 4th capacitor
Capacitance be respectively 100PF, 1000PF, 0.1uF and 1uF.
Further scheme is the first resistor, the second resistance, the 3rd resistor, the 4th resistance
It is all made of high-power metallic film resistance；The first capacitor, second capacitor, the third capacitor, the 4th capacitor are equal
Using high pressure ceramic disc capacitor.
Compared with prior art, the utility model has the beneficial effects that:
When high voltage transient is added to the RC network being made of resistance and capacitor, capacitor and resistance are divided in ladder ratio
Pressure, principle be energy storage act on bigger capacitor parallel connection resistance value it is smaller, in this way after peak transient voltage, value just press than
Example distribution on four capacitors and stores, and shorter according to the transient time, and smaller capacitor just stores more, and the transient time gets over
Long, bigger capacitor just stores more rules, records capacitor both end voltage respectively by voltage hold circuit, and obtain highest
Transient voltage.Certainly, after measurement, resistance can also play the role of helping capacitor electric discharge to re-measure.
So the measuring circuit simple in circuits, reliable operation is passive, is easy to match with various voltage measuring apparatus test leads
It connects；Both transient transient voltage can be measured, the transient voltage of accumulation can also be measured, ensure that discharge protector intelligently divides
Accuracy, the operability of analysis system；High-impedance behavior does not influence the output characteristics of high-voltage generator, ensure that Hi-pot test number
Value is complete with waveform；The circuit, which has, is detached from the characteristics of high pressure to be measured can automatically keep, be convenient for test analysis.
[Detailed description of the invention]
Fig. 1 is a kind of circuit diagram for measuring transient voltage circuit embodiments of the utility model.
Fig. 2 is the circuit diagram of voltage hold circuit in a kind of measurement transient voltage circuit embodiments of the utility model.
[specific embodiment]
In order to which the objects, technical solutions and advantages of utility model are more clearly understood, with reference to the accompanying drawings and embodiments,
The present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain this
Utility model, and it is not exclusively for the utility model.
Referring to Fig. 1, a kind of measurement transient voltage circuit of the utility model includes proportion divider circuit 10, voltage holding electricity
Road 20, output display module 30, proportion divider circuit 10 receive the transient voltage signals of power test equipment 1, and are based on being connect
The transient voltage signals of receipts generate multiple output voltages, and voltage hold circuit 20 receives multiple output voltages, voltage hold circuit
20 generate a display signal based on multiple output voltages, and the output of voltage hold circuit 20 displays signal to output display module 30.
Specifically, proportion divider circuit 10 includes resistance R1, resistance R2, resistance R3, the resistance R4 being sequentially connected in series, ratio point
Volt circuit further includes the capacitor C1 being sequentially connected in series, capacitor C2, capacitor C3, capacitor C4, and resistance R1 is in parallel with capacitor C1, and resistance
It is serially connected between power test equipment 1 and discharge protector 2 after R1 is in parallel with capacitor C1, resistance R2 is in parallel with capacitor C2, resistance
R3 is in parallel with capacitor C3, and resistance R4 is in parallel with capacitor C4.Wherein, the voltage at the both ends capacitor C1 is voltage V1, the both ends capacitor C2
Voltage be voltage V2, the voltage at the both ends capacitor C3 is voltage V3, and the voltage at the both ends capacitor C4 is voltage V4.
Referring to fig. 2, voltage hold circuit 20 includes voltage input end, sampling holder U1 and voltage comparator ic 1, electricity
The third pin of the non-inverting input terminal, sampling holder U1 of pressing comparator IC1 is electrically connected with voltage input end respectively, and sampling is kept
The 8th pin of device U1 is electrically connected with the output end of voltage comparator ic 1, and the inverting input terminal of voltage comparator ic 1, sampling are protected
The 5th pin of holder U1 is electrically connected with the input terminal of output display module 30 respectively.Preferably, sampling holder U1 is sampling
Retainer chip LF398, voltage comparator ic 1 are voltage comparator LM311.
In the present embodiment, voltage hold circuit 20 further includes pull-up resistor R5, switching tube Q1, sampling capacitance C5, pull-up
The first end of resistance R5 is electrically connected with the output end of voltage comparator ic 1, and the collector of switching tube Q1 is with sampling holder U1's
The electrical connection of 6th pin, the emitter of switching tube Q1 are electrically connected with the output end of voltage comparator ic 1.
Specifically, voltage hold circuit 20 is by a piece of sampling holder chip LF398 and one piece of voltage comparator LM311 structure
At the output voltage and input voltage of sampling holder chip LF398 is compared by voltage comparator LM311, works as input
When voltage V1, voltage V2, voltage V3, voltage V4 are greater than output voltage, voltage comparator LM311 exports high level, and transmits
To the logic control end of sampling holder chip LF398, i.e. the 8th pin, sampling holder chip LF398 is made to be in sampling shape
State；When output voltage reaches peak value and declines, voltage V1, voltage V2, voltage V3, voltage V4 are less than output voltage, voltage ratio
Low level is exported compared with device LM311, the logic control end of sampling holder chip LF398 sets low level, makes sampling holder chip
LF398 is in hold mode.
Since voltage comparator LM311 is exported using open collector, therefore pull-up resistor R5 need to be connected；Due to sampling holder
The conducting for the pulse control circuit switching tube Q1 that the output end of chip LF398 is sent did not had sampling capacitance C5 when electricity to discharge, no
Then, sampling capacitance C5 tracks always the variation of peak value.
Preferably, resistance R1, resistance R2, resistance R3, resistance R4 resistance value be respectively 20M, 10M, 1M and 500K, capacitor
C1, capacitor C2, capacitor C3, capacitor C4 capacitance be respectively 100PF, 1000PF, 0.1uF and 1uF.Wherein, resistance R1, resistance
R2, resistance R3, resistance R4 are all made of high-power metallic film resistance, and capacitor C1, capacitor C2, capacitor C3, capacitor C4 are all made of high pressure
Ceramic disc capacitor.
Certainly, as optimization, the value and pressure resistance of capacitor and resistance can also be changed, to adapt to the transient state electricity of wider range
Press measurement range；As optimization, RC network can utilize more than the ladder of level Four, to adapt to the transient time measurement of wider range
Range；As optimization, voltage hold circuit can also increase summing circuit, realize the automatic calculating of highest transient voltage.
It can be seen that capacitor and resistance press ladder ratio when high voltage transient is added to the RC network being made of resistance and capacitor
Example is divided, and principle is that the resistance value of the bigger capacitor parallel connection of energy storage effect is smaller, in this way after peak transient voltage,
Just proportional assignment on four capacitors and stores value, and shorter according to the transient time, and smaller capacitor (capacitive reactance is high) just stores
More, the transient time is longer, and bigger capacitor (capacitive reactance is low) just stores more rules, is remembered respectively by voltage hold circuit 20
Capacitor both end voltage is recorded, and obtains highest transient voltage.Certainly, after measurement, resistance, which can also play, helps capacitor to put
The effect of electricity is to re-measure.
So the measuring circuit simple in circuits, reliable operation is passive, is easy to match with various voltage measuring apparatus test leads
It connects；Both transient transient voltage can be measured, the transient voltage of accumulation can also be measured, ensure that 2 intelligence of discharge protector
Accuracy, the operability of analysis system；High-impedance behavior does not influence the output characteristics of high-voltage generator, ensure that Hi-pot test
Numerical value and waveform it is complete；The circuit, which has, is detached from the characteristics of high pressure to be measured can automatically keep, be convenient for test analysis.
It should be noted that the above is only the preferred embodiment of the utility model, but the design concept of utility model is not
It is confined to this, it is all to conceive the insubstantial modifications made to the utility model using this, also each fall within the protection of the utility model
Within the scope of.
Claims (6)
1. a kind of measurement transient voltage circuit characterized by comprising
Proportion divider circuit, voltage hold circuit, output display module, the proportion divider circuit receive transient voltage signals,
And multiple output voltages are generated based on the received transient voltage signals of institute, the voltage hold circuit receives multiple described defeated
Voltage out, the voltage hold circuit are based on multiple output voltages and generate a display signal, and the voltage hold circuit is defeated
It is described out to display signal to the output display module；
The proportion divider circuit includes the first resistor being sequentially connected in series, second resistance, 3rd resistor, the 4th resistance, the ratio
Example bleeder circuit further includes the first capacitor being sequentially connected in series, the second capacitor, third capacitor, the 4th capacitor, the first resistor with
The first capacitor is in parallel, and the second resistance is in parallel with second capacitor, and the 3rd resistor and the third capacitor are simultaneously
Connection, the 4th resistance are in parallel with the 4th capacitor.
2. a kind of measurement transient voltage circuit according to claim 1, it is characterised in that:
The voltage hold circuit includes voltage input end, sampling holder and voltage comparator, the voltage comparator
Non-inverting input terminal, the sampling holder third pin be electrically connected respectively with the voltage input end, the sampling holder
The 8th pin be electrically connected with the output end of the voltage comparator, the inverting input terminal of the voltage comparator, the sampling
5th pin of retainer is electrically connected with the input terminal of the output display module respectively.
3. a kind of measurement transient voltage circuit according to claim 2, it is characterised in that:
The voltage hold circuit further includes pull-up resistor, switching tube, and the first end of the pull-up resistor is compared with the voltage
The output end of device is electrically connected, and the collector of the switching tube is electrically connected with the 6th pin of the sampling holder, the switch
The emitter of pipe is electrically connected with the output end of the voltage comparator.
4. a kind of measurement transient voltage circuit according to any one of claims 1 to 3, it is characterised in that:
The first resistor, the second resistance, the 3rd resistor, the resistance value of the 4th resistance are respectively 20M, 10M, 1M
And 500K.
5. a kind of measurement transient voltage circuit according to claim 4, it is characterised in that:
The first capacitor, second capacitor, the third capacitor, the 4th capacitor capacitance be respectively 100PF,
1000PF, 0.1uF and 1uF.
6. a kind of measurement transient voltage circuit according to claim 5, it is characterised in that:
The first resistor, the second resistance, the 3rd resistor, the 4th resistance are all made of high-power metallic film electricity
Resistance；The first capacitor, second capacitor, the third capacitor, the 4th capacitor are all made of high pressure ceramic disc capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920063391.XU CN209417136U (en) | 2019-01-15 | 2019-01-15 | A kind of measurement transient voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920063391.XU CN209417136U (en) | 2019-01-15 | 2019-01-15 | A kind of measurement transient voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209417136U true CN209417136U (en) | 2019-09-20 |
Family
ID=67943821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920063391.XU Active CN209417136U (en) | 2019-01-15 | 2019-01-15 | A kind of measurement transient voltage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209417136U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398844A (en) * | 2020-03-10 | 2020-07-10 | 深圳供电局有限公司 | Ripple peak sampling circuit and direct current system monitoring device |
| CN113552476A (en) * | 2020-04-24 | 2021-10-26 | 北京科益虹源光电技术有限公司 | Magnetic pulse compression switch characteristic test system |
| CN113834965A (en) * | 2021-09-15 | 2021-12-24 | 广东电网有限责任公司 | Ripple voltage measuring device and method |
-
2019
- 2019-01-15 CN CN201920063391.XU patent/CN209417136U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398844A (en) * | 2020-03-10 | 2020-07-10 | 深圳供电局有限公司 | Ripple peak sampling circuit and direct current system monitoring device |
| CN113552476A (en) * | 2020-04-24 | 2021-10-26 | 北京科益虹源光电技术有限公司 | Magnetic pulse compression switch characteristic test system |
| CN113834965A (en) * | 2021-09-15 | 2021-12-24 | 广东电网有限责任公司 | Ripple voltage measuring device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209417136U (en) | A kind of measurement transient voltage circuit | |
| CN201589808U (en) | Striking current recording instrument | |
| CN105379120A (en) | Capacitive proximity detection using delta-sigma conversion | |
| CN202956428U (en) | Residual voltage testing device | |
| CN210015156U (en) | Current detection circuit, device and electric product | |
| CN203069672U (en) | Loop resistance testing system | |
| CN207650384U (en) | The detection circuit and electric energy computation chip of bleeder circuit parameter | |
| CN106324538A (en) | Partial discharge automatic calibration system | |
| CN103487713A (en) | Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit | |
| CN108089143A (en) | Detection circuit, method and the electric energy computation chip of bleeder circuit parameter | |
| CN105527468A (en) | Comprehensive test transformation device for high voltage switch cabinet | |
| CN112180176B (en) | Constant current source-based capacitance measuring circuit and method | |
| CN203133266U (en) | Digital testing and evaluation platform used for optical-fiber-type current transformer | |
| CN102710248A (en) | Isolated voltage acquisition circuit | |
| CN204374273U (en) | A kind of handheld digital secondary pressure plate measuring instrument | |
| CN204405728U (en) | Arrester discharge counter | |
| CN108572275B (en) | Inrush current detection system and detection method | |
| CN209356582U (en) | A kind of resistance capacitance accurate measurement circuit | |
| CN211930600U (en) | Intelligent low-voltage fault sensor simulation front-end conditioning circuit | |
| CN103869149A (en) | Alternating small current high-accuracy detection module | |
| CN202393804U (en) | Pulse peak value sampling device | |
| CN208969163U (en) | Electric energy metering device and electrical energy measurement processing module, the electrical parameter detection circuit of voltage detecting circuit | |
| CN106772003A (en) | A kind of load switch of transformer test system and method | |
| CN210514521U (en) | Insulation and voltage resistance inspection device | |
| CN111028639A (en) | Automatic circuit connection detection system for physics electricity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |