CN1048627A - The current transformer of high permeance - Google Patents
The current transformer of high permeance Download PDFInfo
- Publication number
- CN1048627A CN1048627A CN 90106748 CN90106748A CN1048627A CN 1048627 A CN1048627 A CN 1048627A CN 90106748 CN90106748 CN 90106748 CN 90106748 A CN90106748 A CN 90106748A CN 1048627 A CN1048627 A CN 1048627A
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- China
- Prior art keywords
- winding
- iron core
- current transformer
- auxiliary
- main iron
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Abstract
A kind of current transformer of high permeance is wound with auxiliary winding Wc respectively on main iron core 1 and 2
1And Wc
2Auxiliary winding Wc
1And Wc
2Polar end the top is connected, non-polar end respectively with field winding W
aTwo ends connect, on auxiliary iron core 3, be wound with field winding W simultaneously
aWith compensation winding W
bMain iron core 1 and 2 physical dimension equate that material is identical; Auxiliary winding Wc
1And Wc
2Equal turn numbers.Manufacturing process of the present invention is simple, and debugging is convenient, applied range.The permeability that can improve main iron core reduces the error of current transformer, realizes improving one or two grade of current transformer precision.
Description
The invention belongs to the current transformer of a kind of high permeance in the electric product.
At present, magnetic shunt compensation method or zero flux compensation method are mostly adopted in the design of general current transformer, magnetic shunt compensation ratio juris line map as shown in Figure 1: 1 is the main iron core of current transformer, and 2 is magnetic shunt, secondary winding W
2In W is arranged
bCircle only on main iron core 1, that is to say on the magnetic shunt 2 few around W
bThe circle pitch of the laps, W
bCompensate the number of turn exactly, at this moment the magnetic on the magnetic shunt is close just close far above the magnetic on the main iron core 1, so when operating current also hour, magnetic shunt has just reached the working point of permeability maximum, thereby can turn round flat ratio difference curve, play the nonlinear compensation effect, zero flux compensation ratio juris line map as shown in Figure 2; 1 is the main iron core of current transformer, and 2 is the auxiliary iron core of current transformer, at secondary winding W
2In, W
B1Only on main iron core 1, and W
B2But only on auxiliary iron core 2, impedance Z is its compensating impedance.Compensation principle is such: when its compensating impedance Z equates with its Current Transformer Secondary referring impedance, and close being close to zero of magnetic on the main iron core 1 then, thus reduced the error of current transformer.This method is when power-factor of load COS φ=1, and compensating impedance Z simulates easily, also relatively good usefulness, and when power-factor of load COS φ=1, compensating impedance Z just is not easy simulation, and is restricted.More than the argumentation of two kinds of compensation methodes see described in " electrical measurement and instrument " 1971.NO1-4.
The objective of the invention is at above the deficiencies in the prior art part, design a kind of current transformer with high permeance, it can be excitatory separately, improve the permeability of current transformer core, that is to say does not need to increase the error that comparatively complicated compensating element, just can reduce current transformer, thereby realizes improving the accuracy class of current transformer.
The present invention finishes as follows: shown in Figure 3 is scheme circuit of the present invention.The current transformer of this high magnetic characteristic is by main iron core 1 and 2, auxiliary iron core 3, secondary winding W
2, auxiliary winding W
C1, W
C2, field winding W
aWith compensation winding W
bForm.On main iron core 1, be wound with auxiliary winding W
C1, on main iron core 2, be wound with auxiliary winding W
C2, auxiliary winding W
C1And W
C2Polar end the top is connected, non-polar end respectively with field winding W
aTwo ends connect, on auxiliary iron core 3, be wound with field winding W simultaneously
aWith compensation winding W
b, secondary winding W
2On main iron core 1 and 2.Secondary winding W
2With compensation winding W
bSeries connection.Main iron core is divided into two and becomes two physical dimensions and equate, and the identical main iron core 1 and 2 of material, auxiliary winding W
C1And W
C2Equal turn numbers.A winding while, the number of turn of a winding can be single-turn type or multiturn formula on main iron core 1,2 and auxiliary iron core 3, and a winding does not omit in Fig. 3 to be drawn.Compensation winding W
bThe magnetic that is used for regulating auxiliary iron core 3 is close, field winding W
aGive auxiliary winding W
C1And W
C2One exciting curent is provided, thereby makes the permeability of main iron core 1 and 2 greatly improve the error that reduces current transformer, accuracy can improve one or two grade like this.
Advantage of the present invention is: manufacturing process is simple, debugging is convenient, applied range.It can be excitatory separately, improves the permeability of current transformer core, promptly need not increase the error that comparatively complicated compensating element, just can reduce current transformer, realizes improving one or two grade of current transformer precision.The compensation method of adopting the present invention to use is not only applicable to make all kinds of current transformers, and is applicable to all kinds of voltage transformers of manufacturing.
Embodiments of the invention:
Its schematic circuit as shown in Figure 3.Produce 0.2 grade current transformer, current ratio 150A/5A, secondary load 5VA.Main iron core 1 and 2 physical dimension equate that material is identical, and promptly main iron core 1 and 2 is of a size of φ 45/ φ 60 * 30; Material is 0.35 millimeter a silicon steel sheet, and auxiliary iron core 3 is of a size of φ 65/ φ 70 * 50, and material also is 0.35 millimeter a silicon iron plate; Winding W
aAnd W
bUse the lead coiling of φ φ 1.56 respectively; Winding W
C1, W
C2And W
aUse the lead coiling of φ 0.96 respectively; Each umber of turn is as follows:
W
2=30 circles; The Wb=15 circle; W
a=25 circles; W
C1=W
C2=33 circles.
Claims (3)
1, a kind of have main iron core 1 and 2, auxiliary iron core 3, a secondary winding W
2, auxiliary winding W
C1, W
C2, field winding W
aWith compensation winding W
bThe current transformer of the high permeance of forming is characterized in that being wound with auxiliary winding W on main iron core 1
C1, on main iron core 2, be wound with auxiliary winding W
C2, auxiliary winding W
C1With auxiliary winding W
C2Polar end the top is connected, non-polar end respectively with field winding W
aTwo ends connect, on auxiliary iron core 3, be wound with field winding W simultaneously
aWith compensation winding W
b
2, the current transformer of high permeance according to claim 1 it is characterized in that the physical dimension of described main iron core 1 and 2 equates, and material is identical.
3, the current transformer of high magnetic conductivity according to claim 1 is characterized in that described auxiliary winding W
C1And W
C2Equal turn numbers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106748 CN1020520C (en) | 1990-08-02 | 1990-08-02 | High permeance current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106748 CN1020520C (en) | 1990-08-02 | 1990-08-02 | High permeance current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1048627A true CN1048627A (en) | 1991-01-16 |
| CN1020520C CN1020520C (en) | 1993-05-05 |
Family
ID=4880244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90106748 Expired - Fee Related CN1020520C (en) | 1990-08-02 | 1990-08-02 | High permeance current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020520C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360885A (en) * | 2011-07-07 | 2012-02-22 | 张逢春 | Combined current transformer |
| CN102709042A (en) * | 2012-06-21 | 2012-10-03 | 陈德才 | Current transformer |
| CN103854841A (en) * | 2012-12-06 | 2014-06-11 | 上海浦东金盛互感器厂 | Error compensation method for current transformer capable of being accompanied by direct current |
| CN104505243A (en) * | 2014-09-22 | 2015-04-08 | 秦喜昌 | Development and application of 0.001-grade high-voltage and high-accuracy double pole voltage transformer |
| CN104849532A (en) * | 2015-06-09 | 2015-08-19 | 中国电力科学研究院 | Precise current sensor |
| CN107170571A (en) * | 2017-06-07 | 2017-09-15 | 中国电力科学研究院 | A kind of multilevel voltage transformer |
| CN107424815A (en) * | 2017-08-18 | 2017-12-01 | 陈宇斯 | A kind of two-stage current transformer compensated using circle is subtracted |
| CN110098041A (en) * | 2018-12-18 | 2019-08-06 | 何排枝 | A kind of anti-DC current transformer of telescopiform series compensation |
| CN110098040A (en) * | 2018-11-19 | 2019-08-06 | 何排枝 | A kind of anti-DC current transformer |
-
1990
- 1990-08-02 CN CN 90106748 patent/CN1020520C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360885A (en) * | 2011-07-07 | 2012-02-22 | 张逢春 | Combined current transformer |
| CN102709042B (en) * | 2012-06-21 | 2015-06-10 | 陈德才 | Current transformer |
| CN102709042A (en) * | 2012-06-21 | 2012-10-03 | 陈德才 | Current transformer |
| CN103854841A (en) * | 2012-12-06 | 2014-06-11 | 上海浦东金盛互感器厂 | Error compensation method for current transformer capable of being accompanied by direct current |
| CN104505243B (en) * | 2014-09-22 | 2015-12-02 | 秦喜昌 | 0.001 grade of high pressure high accuracy double-stage voltage transformer development and application |
| CN104505243A (en) * | 2014-09-22 | 2015-04-08 | 秦喜昌 | Development and application of 0.001-grade high-voltage and high-accuracy double pole voltage transformer |
| CN104849532A (en) * | 2015-06-09 | 2015-08-19 | 中国电力科学研究院 | Precise current sensor |
| CN104849532B (en) * | 2015-06-09 | 2020-01-17 | 中国电力科学研究院 | Precise current sensor |
| CN107170571A (en) * | 2017-06-07 | 2017-09-15 | 中国电力科学研究院 | A kind of multilevel voltage transformer |
| CN107424815A (en) * | 2017-08-18 | 2017-12-01 | 陈宇斯 | A kind of two-stage current transformer compensated using circle is subtracted |
| CN107424815B (en) * | 2017-08-18 | 2019-04-30 | 陈宇斯 | A kind of two-stage current transformer compensated using circle is subtracted |
| CN110098040A (en) * | 2018-11-19 | 2019-08-06 | 何排枝 | A kind of anti-DC current transformer |
| CN110098041A (en) * | 2018-12-18 | 2019-08-06 | 何排枝 | A kind of anti-DC current transformer of telescopiform series compensation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1020520C (en) | 1993-05-05 |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |