CN209471163U - A kind of current collection circuit mixing instrument - Google Patents
A kind of current collection circuit mixing instrument Download PDFInfo
- Publication number
- CN209471163U CN209471163U CN201822043251.4U CN201822043251U CN209471163U CN 209471163 U CN209471163 U CN 209471163U CN 201822043251 U CN201822043251 U CN 201822043251U CN 209471163 U CN209471163 U CN 209471163U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- resistance
- measurement chip
- current
- chip
- 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
Abstract
The utility model discloses a kind of current collection circuits for mixing instrument, including current transformer J_C, third diode D3, the 21st resistance R21, the 25th resistance R25, the 22nd resistance R22, the 15th resistance R15, the 28th capacitor C28 and the 4th capacitor C4.The utility model can prevent circuit overloads, incude high-power current signal, measurement accuracy is high, low in cost.
Description
Technical field
The utility model relates to current acquisition technical field, especially a kind of current collection circuit for mixing instrument.
Background technique
With the development and progress of society, Improving The Quality of Products, reducing production cost becomes important goal.It is single to realize
Phase current table, three-phase electricity flow table, single-phase voltage table, three-phase voltage meter, frequency meter, power meter, multifunctional meter multiple product have
Identical production line improves the production efficiency of product, reduces production cost, not by the software and hardware intersection of multiple product
Disconnected amplification fusion, forms unitized product line.
Existing mixing instrument current collection circuit is easy to burn out rear measuring circuit when there is high-power current signal,
Measurement accuracy requirement is relatively high, then the cost for mixing instrument similarly increases.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of current acquisition electricity for mixing instrument
Road solves existing current collection circuit measurement accuracy and increases, so that the problem of cost of mixing instrument also increases, the application energy
Circuit overloads are prevented, incude high-power current signal, measurement accuracy is high, low in cost.
The purpose of this utility model is achieved through the following technical solutions:
A kind of current collection circuit mixing instrument, including current transformer J_C, third diode D3, the 21st electricity
Hinder R21, the 25th resistance R25, the 22nd resistance R22, the 15th resistance R15, the 28th capacitor C28 and the 4th capacitor
C4；The first end of current transformer J_C is connected by third diode D3 with the second end of current transformer J_C, Current Mutual Inductance
The first end of device J_C also passes through the second end of the 25th resistance R25, the 22nd resistance R22 and current transformer J_C, electricity
The first end of current transformer J_C also passes through the 25th resistance R25 and is connected with the end REF0；The first end of current transformer J_C is also
Pass through the 21st resistance R21, the 28th capacitor C28, the 4th capacitor C4, the 15th resistance R15 and current transformer J_C
Second end is connected；The first end of current transformer J_C is connected by the 21st resistance R21 with the end V3P, current transformer J_C
First end be connected with the end AGND by the 21st resistance R21, the 28th capacitor C28, the second end of current transformer J_C
It is connected by the 25th resistance R25 with the end V3N.
It preferably, further include current measurement chip circuit, current measurement chip circuit includes measurement chip U6, the 13rd
Resistance R13, twelfth resistor R12, eleventh resistor R11, the 7th capacitor C7, the 6th capacitor C6, the 5th capacitor C5, the 11st electricity
Hold C11, the tenth capacitor C10, the 9th capacitor C9 and the 8th capacitor C8；The first end of measurement chip U6 is connected with the end VCC, measures core
The first end of piece U6 is connected by eleventh resistor R11 with the second end for measuring chip U6, and the first end of measurement chip U6 passes through
Twelfth resistor R12 is connected with the 4th end of measurement chip U6, and the first end of measurement chip U6 by thirteenth resistor R13 and is surveyed
The 5th end for measuring chip U6 is connected, and the third end for measuring chip U6 is grounded by the 11st capacitor C11, measures the third of chip U6
End is also grounded by the tenth capacitor C10；The 6th end for measuring chip U6 is the end V3P, and the 7th end of measurement chip U6 is the end V3N,
The first end of measurement chip U6 also passes through eleventh resistor R11, the 5th capacitor C5 ground connection, and the first end of measurement chip U6 also passes through
The first end of twelfth resistor R12, the 6th capacitor C6 ground connection, measurement chip U6 also passes through thirteenth resistor R13, the 7th capacitor C7
Ground connection；The 12nd end for measuring chip U6 is grounded by the 8th capacitor C8, and the 12nd end of measurement chip U6 passes through the 9th capacitor
C9 ground connection, the 13rd end ground connection of measurement chip U6, the 24th end ground connection of measurement chip U6.
Preferably, the 21st resistance R21 and the 15th resistance R15 is current-limiting resistance.
Preferably, the 28th capacitor C28 and the 4th capacitor C4 is filter capacitor.
Increase the beneficial effects of the utility model are: the utility model solves existing current collection circuit measurement accuracy,
So that the problem of cost of mixing instrument also increases, the application can prevent circuit overloads, incude high-power current signal, measurement essence
Degree is high, low in cost.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model current measurement chip.
Specific embodiment
The technical solution of the utility model, but the protection scope of the utility model are described in further detail with reference to the accompanying drawing
It is not limited to as described below.
A kind of current collection circuit mixing instrument, please refers to shown in attached drawing 1 and attached drawing 2, including current transformer J_C,
Third diode D3, the 21st resistance R21, the 25th resistance R25, the 22nd resistance R22, the 15th resistance R15,
28 capacitor C28 and the 4th capacitor C4；The first end of current transformer J_C passes through third diode D3 and current transformer J_
The second end of C is connected, and the first end of current transformer J_C also passes through the 25th resistance R25, the 22nd resistance R22 and electricity
The second end of current transformer J_C, the first end of current transformer J_C also pass through the 25th resistance R25 and are connected with the end REF0；Electricity
The first end of current transformer J_C also passes through the 21st resistance R21, the 28th capacitor C28, the 4th capacitor C4, the 15th electricity
Resistance R15 is connected with the second end of current transformer J_C；The first end of current transformer J_C by the 21st resistance R21 with
The end V3P is connected, and the first end of current transformer J_C passes through the 21st resistance R21, the 28th end capacitor C28 and AGND phase
Even, the second end of current transformer J_C is connected by the 25th resistance R25 with the end V3N.
It preferably, further include current measurement chip circuit, current measurement chip circuit includes measurement chip U6, the 13rd
Resistance R13, twelfth resistor R12, eleventh resistor R11, the 7th capacitor C7, the 6th capacitor C6, the 5th capacitor C5, the 11st electricity
Hold C11, the tenth capacitor C10, the 9th capacitor C9 and the 8th capacitor C8；The first end of measurement chip U6 is connected with the end VCC, measures core
The first end of piece U6 is connected by eleventh resistor R11 with the second end for measuring chip U6, and the first end of measurement chip U6 passes through
Twelfth resistor R12 is connected with the 4th end of measurement chip U6, and the first end of measurement chip U6 by thirteenth resistor R13 and is surveyed
The 5th end for measuring chip U6 is connected, and the third end for measuring chip U6 is grounded by the 11st capacitor C11, measures the third of chip U6
End is also grounded by the tenth capacitor C10；The 6th end for measuring chip U6 is the end V3P, and the 7th end of measurement chip U6 is the end V3N,
The first end of measurement chip U6 also passes through eleventh resistor R11, the 5th capacitor C5 ground connection, and the first end of measurement chip U6 also passes through
The first end of twelfth resistor R12, the 6th capacitor C6 ground connection, measurement chip U6 also passes through thirteenth resistor R13, the 7th capacitor C7
Ground connection；The 12nd end for measuring chip U6 is grounded by the 8th capacitor C8, and the 12nd end of measurement chip U6 passes through the 9th capacitor
C9 ground connection, the 13rd end ground connection of measurement chip U6, the 24th end ground connection of measurement chip U6.
Preferably, the 21st resistance R21 and the 15th resistance R15 is current-limiting resistance.
Preferably, the 28th capacitor C28 and the 4th capacitor C4 is filter capacitor.
In circuit, current transformer J_C forms alternating message source by induction main line electric current.Contactless 3rd 2
Pole pipe D3 is TVS protection pipe, prevents circuit overloads, incudes bigger power current signal, burns out rear measuring circuit.20th
Two resistance R22 and the 25th resistance R25 are the resistance for converting the current into voltage signal, relatively high to required precision, are passed through
Voltage signal is divided into the positive part and negative part of reference by double resistance.15th resistance R15 and the 21st resistance R21 are
Current-limiting resistance, cooperation the 28th capacitor C28 and the 4th capacitor C4 carry out the filtering of positive and negative both direction.Output signal enters survey
Chip is measured, analog-to-digital conversion is carried out by difference operational amplifying circuit circuit.Periodical modulus measurements are integrated again, to obtain
Corresponding current value.Other several current acquisition principles are identical.
Specific embodiment of the present utility model above described embodiment only expresses, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.
Claims (4)
1. a kind of current collection circuit for mixing instrument, which is characterized in that including current transformer J_C, third diode D3, the
21 resistance R21, the 25th resistance R25, the 22nd resistance R22, the 15th resistance R15, the 28th capacitor C28 and
4th capacitor C4；The first end of current transformer J_C is connected by third diode D3 with the second end of current transformer J_C,
The first end of current transformer J_C also passes through the of the 25th resistance R25, the 22nd resistance R22 and current transformer J_C
Two ends, the first end of current transformer J_C also pass through the 25th resistance R25 and are connected with the end REF0；The of current transformer J_C
One end also passes through the 21st resistance R21, the 28th capacitor C28, the 4th capacitor C4, the 15th resistance R15 and Current Mutual Inductance
The second end of device J_C is connected；The first end of current transformer J_C is connected by the 21st resistance R21 with the end V3P, and electric current is mutual
The first end of sensor J_C is connected by the 21st resistance R21, the 28th capacitor C28 with the end AGND, current transformer J_C
Second end be connected with the end V3N by the 25th resistance R25.
2. a kind of current collection circuit for mixing instrument according to claim 1, which is characterized in that it further includes current measurement
Chip circuit, current measurement chip circuit include measurement chip U6, thirteenth resistor R13, twelfth resistor R12, the 11st electricity
Hinder R11, the 7th capacitor C7, the 6th capacitor C6, the 5th capacitor C5, the 11st capacitor C11, the tenth capacitor C10, the 9th capacitor C9 and
8th capacitor C8；The first end of measurement chip U6 is connected with the end VCC, and the first end of measurement chip U6 passes through eleventh resistor R11
Be connected with the second end of measurement chip U6, the first end of measurement chip U6 passes through twelfth resistor R12 and the of measurement chip U6
Four ends are connected, and the first end of measurement chip U6 is connected by thirteenth resistor R13 with the 5th end for measuring chip U6, measure chip
The third end of U6 is grounded by the 11st capacitor C11, and the third end of measurement chip U6 also passes through the tenth capacitor C10 ground connection；Measurement
The 6th end of chip U6 is the end V3P, and the 7th end of measurement chip U6 is the end V3N, and the first end of measurement chip U6 also passes through the tenth
One resistance R11, the 5th capacitor C5 ground connection, the first end of measurement chip U6 also passes through twelfth resistor R12, the 6th capacitor C6 connects
Ground, the first end of measurement chip U6 also pass through thirteenth resistor R13, the 7th capacitor C7 ground connection；Measure the 12nd end of chip U6
It being grounded by the 8th capacitor C8, the 12nd end for measuring chip U6 is grounded by the 9th capacitor C9, and the 13rd of measurement chip U6 the
End ground connection, the 24th end ground connection of measurement chip U6.
3. a kind of current collection circuit for mixing instrument according to claim 1, which is characterized in that the 21st resistance R21
It is current-limiting resistance with the 15th resistance R15.
4. a kind of current collection circuit for mixing instrument according to claim 1, which is characterized in that the 28th capacitor C28
It is filter capacitor with the 4th capacitor C4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822043251.4U CN209471163U (en) | 2018-12-06 | 2018-12-06 | A kind of current collection circuit mixing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822043251.4U CN209471163U (en) | 2018-12-06 | 2018-12-06 | A kind of current collection circuit mixing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209471163U true CN209471163U (en) | 2019-10-08 |
Family
ID=68088245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822043251.4U Active CN209471163U (en) | 2018-12-06 | 2018-12-06 | A kind of current collection circuit mixing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209471163U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581019A (en) * | 2018-12-06 | 2019-04-05 | 安徽凯川电力保护设备有限公司 | A kind of current collection circuit mixing instrument |
-
2018
- 2018-12-06 CN CN201822043251.4U patent/CN209471163U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581019A (en) * | 2018-12-06 | 2019-04-05 | 安徽凯川电力保护设备有限公司 | A kind of current collection circuit mixing instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104849649B (en) | A kind of detection method of current transformer for metering secondary circuit state | |
| CN101308172B (en) | Current integration type power detection device and power checking module | |
| CN207690249U (en) | A kind of electrical fire safety monitoring device | |
| CN204008845U (en) | A kind of single-phase electric energy meter metering circuit | |
| CN202929194U (en) | Calibrating device for dc electric energy meter | |
| CN203287421U (en) | Measurement circuit for three-phase AC voltage and current | |
| CN209471163U (en) | A kind of current collection circuit mixing instrument | |
| CN209070006U (en) | A kind of current sensor | |
| CN203204062U (en) | Comparator-based voltage signal detection circuit | |
| CN201078757Y (en) | Electric leakage and electric larceny recognition indicating circuit for single phase AC power supply circuitry | |
| CN205037982U (en) | Utilize constant current source temperature detection circuit of operational amplifier characteristic | |
| CN202171609U (en) | Current induction detection circuit | |
| CN205317841U (en) | A keep apart current detection circuit for photovoltaic power generation | |
| CN107831358A (en) | A kind of current measurement device based on MAX4373HEUA | |
| CN102914760A (en) | Direct-current power meter calibrating device | |
| CN109581019A (en) | A kind of current collection circuit mixing instrument | |
| CN202486194U (en) | Current sensor based on Rogowski coil | |
| CN201107348Y (en) | Two-wire system true effective value transmitter with TRMS signal conversion module as core | |
| CN204556725U (en) | The miniature power consumption pick-up unit of electrical equipment | |
| CN204131469U (en) | For calibrating the accurate alternating voltage amplifier of lightning arrester block property current tester | |
| CN208969163U (en) | Electric energy metering device and electrical energy measurement processing module, the electrical parameter detection circuit of voltage detecting circuit | |
| CN202182914U (en) | A circuit utilizing a linear optical coupler to realize accurate measurement of AC zero passage signals | |
| CN208477002U (en) | A kind of measurement protective device | |
| CN204028156U (en) | A kind of inductive current change-over circuit | |
| CN202133704U (en) | Electric AC nano-voltmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |