CN206098134U - Wide -range zero flux current ratio converter - Google Patents
Wide -range zero flux current ratio converter Download PDFInfo
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- CN206098134U CN206098134U CN201621076650.5U CN201621076650U CN206098134U CN 206098134 U CN206098134 U CN 206098134U CN 201621076650 U CN201621076650 U CN 201621076650U CN 206098134 U CN206098134 U CN 206098134U
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- annular core
- magnetic balance
- range
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- 230000004907 flux Effects 0.000 title claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 94
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 33
- 230000008859 change Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000005611 electricity Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model discloses a wide -range zero flux current ratio converter, detect the winding including a magnetic balance, a proportion winding, troidal core I and troidal core II, a current sampling resistance, a magnetic balance detects and drive circuit, a plurality of proportion winding switching measuring range relays, wherein, the magnetic balance detects the even coiling of winding on troidal core I, then inlay troidal core II inside troidal core I, again with the even coiling of proportion winding on troidal core I and troidal core II, the primary winding also even coiling on troidal core I and troidal core II, secondary proportion winding N2 includes a plurality of proportion sectionalized windings, and each proportion sectionalized winding corresponds proportion sectionalized winding terminal, and each proportion sectionalized winding terminal pair should each proportion winding switching measuring range relay. The utility model provides a problem of zero flux current ratio converter electric current range adaptability, the zero flux current ratio converter is utilized, the automated inspection to the electric current can be realized.
Description
Technical field
The utility model and a kind of wide-range Zero flux current ratio converter, belong to technical field of electromagnetic measurement.
Background technology
The transformation of scale of electric current generally adopts current transformer, current transformer to have the degree of accuracy high, and stable performance etc. is excellent
Point, but the big heaviness of volume, once, secondary current binding post it is many, need during range swithching by nameplate connection table to once and two
The ampere wires of secondary terminal are disconnected, and operating process is complicated, and high labor intensive, efficiency is low；Applied current transformer enters line width
Range current measurement difficulty is big.
Utility model content
The purpose of this utility model be in order to solve current measurement during range program control switching problem, reach electric current
Wide range measure, reduces the volume and weight of current ratio conversion equipment, simplifies operating process, reduces high labor intensive, improves
Efficiency, the utility model provides a kind of wide-range Zero flux current ratio converter.
Technical thought of the present utility model is：Zero flux current ratio converter, including one are built using magnetic balance principle
Individual magnetic balance detection winding, a ratio winding, annular core I and annular core II, a current sampling resistor, a magnetic recording level
Weighing apparatus detection and drive circuit, multiple ratio winding ranges switch relay, wherein, magnetic balance detection winding is uniformly wound on annular
On iron core I, then annular core II is embedded in inside annular core I, then by ratio winding be uniformly wound on annular core I and
On annular core II.First winding is also uniformly wound on annular core I and annular core II；Ratio winding exports in proportion electricity
Flow through output primary current proportional voltage signal after current/voltage-converted；Ratio winding can arrange multiple measurement switching taps, use
In expanded range.
The utility model is realized by following technical proposals.A kind of wide-range Zero flux current ratio converter, including
One zero-flux current transformer, a current sampling resistor, a magnetic balance detection and drive circuit, multiple ratio winding amounts
Journey switching relay, annular core I and annular core II, wherein, magnetic balance detection winding is uniformly wound on annular core I,
Then annular core II is embedded in inside annular core I, then ratio winding is uniformly wound on into annular core I and annular core
On II.First winding is also uniformly wound on annular core I and annular core II；Secondary ratio winding N2Including multiple ratios point
Section winding, each scale segment winding correspondence scale segment winding terminals, the corresponding each ratio winding amount of each scale segment winding terminals
Journey switches relay；Magnetic balance detection winding NTPolar end T1Meet the signal input part S of magnetic balance detection and drive circuiti, inspection
Survey the non-polar end T of winding2Connect the com ends of magnetic balance detection and drive circuit；Secondary ratio winding N2Polar end S1Connect output
End Ui, the fixed contact of each ratio winding range switching relay meets the current output terminal I of magnetic balance detection and drive circuito；Electricity
Stream sample resistance is connected on secondary ratio winding N2Initiating terminal and public com ends between, magnetic balance detection and drive circuit
Com terminates public com ends.
Further preferably, including five ratio winding ranges switch relay J01、J02、J03、J04、J05。
Further preferably, secondary ratio winding N2Including initiating terminal S1, scale segment winding terminal S2、S3、S4、S5、S6, S2、
S3、S4、S5、S6End meets respectively ratio winding range switching relay J01、J02、J03、J04、J05Opening and closing contact.
Further preferably, secondary ratio winding N2Scale segment winding terminal S2、S3、S4、S5、S6Respectively correspond to 1A, 5A,
Five current ranges of 20A, 100A, 500A.
Each range is secondary around being carefully composed in series by sectional wind coil, and each section of umber of turn is shown in Table 1：
The beneficial effects of the utility model are, on the basis of zero-flux current transformer, by tapping electric current are extended
Range, solves the test problems of wide-range electric current；And realize that current range automatically switches, by current/voltage transformation of scale,
Realize A/D directly to sample wide-range electric current using circuit；With method is simple, economic, science, practicality, it is workable,
Low cost and other advantages.
Description of the drawings
Fig. 1 is variable specific current transformer schematic diagram；
Fig. 2 is single range Zero flux current ratio converter schematic diagram.
Fig. 3 is magnetic balance detection and power amplification circuit figure.
Fig. 4 is wide-range Zero flux current ratio converter schematic diagram.
Symbol in figure：
L1、L2、L3、L4、L5、L6----variable specific current transformer primary connection end；
K1、K2、K3、K4、K5、K6、K7----variable specific current transformer secondary connection end；
N1----zero-flux current transformer first winding；
N2--- the secondary ratio winding of-zero-flux current transformer；
NT----zero-flux current transformer magnetic balance detection winding；
J01、J02、J03、J04、J05----ratio winding range switches relay；
T1、T2--- -- respectively magnetic balance detection winding NTPolar end and non-polar end；
S1----secondary ratio winding N2Polar end；
S2、S3、S4、S5、S6----secondary ratio winding N2Scale segment winding non-polar end；
Si----signal input part；
Ui----output end；
I0----current output terminal；
R---- Current sampling resistors；
R1～R7----resistor；
D1、D2----diode；
A1、A2----operational amplifier；
V1、V2----power amplifier；
C---- capacitors；
+VCC、-VCC----be respectively positive supply, negative supply；
Com---- is common port；
Specific embodiment
The utility model is described in detail below in conjunction with accompanying drawing.
As shown in Fig. 2 a kind of single range Zero flux current ratio converter, including a magnetic balance detection winding, one
Ratio winding, annular core I and annular core II, a current sampling resistor, a magnetic balance detection and drive circuit, it is multiple
Ratio winding range switches relay, wherein, the magnetic balance detection winding of zero-flux current transformer is uniformly wound on annular iron
On core I 1, then annular core II 2 is embedded in inside annular core I 1, then ratio winding is uniformly wound on into annular iron
On core I 1 and annular core II 2, first winding is also uniformly wound on annular core I 1 and annular core II 2；According to electricity
Current transformer general principle, exciting current is the main cause that current transformer produces error, and eliminating exciting current can be effectively
Improve the degree of accuracy of current transformer.Magnetic balance detects that circuit and exciting current drive circuit pass through NTWinding detects the magnetic of iron core
Poised state, and by negative-feedback circuit compensating proportion winding N2Electric current, reaches the purpose for eliminating iron core exciting current magnetic field.
The single range Zero flux current ratio converter principle of the utility model foundation, by the method for expanded range, by electricity
Flow measurement expanded range, by taking current measuring range 1A～500A as an example.
A kind of wide-range Zero flux current ratio converter, including a magnetic balance detection winding, a ratio winding, ring
Shape iron core I and annular core II, a current sampling resistor, a magnetic balance detection and drive circuit, five ratio winding amounts
Journey switches relay J01、J02、J03、J04、J05, a detection winding.The magnetic balance detection winding of zero-flux current transformer is equal
It is even to be wound on annular core I, then annular core II is embedded in inside annular core I, then by the uniform coiling of ratio winding
On annular core I and annular core II, first winding N1The circle of punching one on annular core I and annular core II, it is concrete real
Shi Shike is substituted by a high current wire；N2For secondary ratio winding, its tap S2、S3、S4、S5、S6Respectively correspond to 1A, 5A,
Five current ranges of 20A, 100A, 500A；NTFor magnetic balance detection winding.The logical relation of current range and relay tip
(being shown in Table 1)；NTThe polar end T of winding1Meet the signal input part S of magnetic balance detection and drive circuiti, NTThe non-polar end T of winding2
Termination com ends；N2The polar end S of winding1Connect output end Ui, N2The non-polar end S of winding2、S3、S4、S5、S6Electricity is succeeded respectively in end
The J of device01、J02、J03、J04、J05Opening and closing contact, relay J01～J05Fixed contact connect the electricity of magnetic balance detection and drive circuit
Stream output end Io；Current sampling resistor R is connected on S1Between com ends.The com of magnetic balance detection and drive circuit connects common port
com。
Umber of turn is calculated：
According to current transformer general principle, primary current and the product of the first winding number of turn be equal to secondary current with it is secondary around
The product of the group number of turn, i.e.,：
I1N1=I2N2...............(1)
In formula：
I1、I2Respectively primary current, secondary current；
N1、N2Respectively the first winding number of turn, the Secondary Winding number of turn；
Due to N1For 1 circle, with I2As a example by=0.1A, then：
Each range Secondary Winding is composed in series by sectional wind coil, and each section of umber of turn is shown in Table 1：
Above-described embodiment is used to illustrate embodiment of the present utility model, but does not include whole embodiments, ability
Field technique personnel can make corresponding change in objective of the present utility model, should also belong to protection domain of the present utility model.
Claims (4)
1. a kind of wide-range Zero flux current ratio converter, it is characterised in that：Including a magnetic balance detection winding, a ratio
Example winding, annular core I and annular core II, a current sampling resistor, a magnetic balance detection and drive circuit, multiple ratios
Example winding range switching relay, wherein, magnetic balance detection winding is uniformly wound on annular core I, then by annular core
II is embedded in inside annular core I, then ratio winding is uniformly wound on annular core I and annular core II；First winding
Also uniformly it is wound on annular core I and annular core II；Secondary ratio winding N2Including multiple scale segment windings, each ratio
Sectional wind correspondence scale segment winding terminals, the corresponding each ratio winding range of each scale segment winding terminals switches relay,
Magnetic balance detection winding NTPolar end T1Meet the signal input part S of magnetic balance detection and drive circuiti, the non-pole of detection winding
Property end T2Connect the com ends of magnetic balance detection and drive circuit；Secondary ratio winding N2Starting termination output end, each ratio winding
The fixed contact of range switching relay connects the current output terminal of magnetic balance detection and drive circuit；Current sampling resistor is connected on
Secondary ratio winding N2Initiating terminal and public com ends between, the com of magnetic balance detection and drive circuit terminates public com ends.
2. wide-range Zero flux current ratio converter according to claim 1, it is characterised in that：Including five ratios around
Group range switching relay J01、J02、J03、J04、J05。
3. wide-range Zero flux current ratio converter according to claim 2, it is characterised in that：Secondary ratio winding N2
Including polar end S1, ratio winding non-polar end S2、S3、S4、S5、S6；S2、S3、S4、S5、S6End connects respectively ratio winding range and cuts
Change relay J01、J02、J03、J04、J05Opening and closing contact.
4. wide-range Zero flux current ratio converter according to claim 3, it is characterised in that：Secondary ratio winding N2
Ratio winding non-polar end S2、S3、S4、S5、S6Five current ranges of 1A, 5A, 20A, 100A, 500A are corresponded to respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076650.5U CN206098134U (en) | 2016-09-23 | 2016-09-23 | Wide -range zero flux current ratio converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076650.5U CN206098134U (en) | 2016-09-23 | 2016-09-23 | Wide -range zero flux current ratio converter |
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| Publication Number | Publication Date |
|---|---|
| CN206098134U true CN206098134U (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621076650.5U Withdrawn - After Issue CN206098134U (en) | 2016-09-23 | 2016-09-23 | Wide -range zero flux current ratio converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298214A (en) * | 2016-09-23 | 2017-01-04 | 国网江西省电力公司电力科学研究院 | A kind of wide-range Zero flux current ratio changer |
-
2016
- 2016-09-23 CN CN201621076650.5U patent/CN206098134U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298214A (en) * | 2016-09-23 | 2017-01-04 | 国网江西省电力公司电力科学研究院 | A kind of wide-range Zero flux current ratio changer |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170412 Effective date of abandoning: 20180109 |