CN103366938A - Compensation type current transformer - Google Patents
Compensation type current transformer Download PDFInfo
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- CN103366938A CN103366938A CN2013103355398A CN201310335539A CN103366938A CN 103366938 A CN103366938 A CN 103366938A CN 2013103355398 A CN2013103355398 A CN 2013103355398A CN 201310335539 A CN201310335539 A CN 201310335539A CN 103366938 A CN103366938 A CN 103366938A
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Abstract
A compensation type current transformer comprises an iron core and a coil wound on the iron core which comprises a main iron core and an auxiliary iron core. The auxiliary iron core is formed by 2-4 circles of silicon steel sheets in a coiling mode. The auxiliary iron core wrapped with insulation crepe paper is arranged outside the transformer main iron core wrapped with insulation crepe paper in a sleeved mode. The coil winds the main iron core by 5-10 circles first, and after the auxiliary iron core is arranged in a sleeved mode, the remaining coil are wound. Due to the fact the coil on the auxiliary iron core is 5-10 circles less than the coil on the main iron core, the auxiliary iron core gets in a saturation state before the main iron core and can output stable currents. When primary side currents of the current transformer are small, error compensation on secondary side currents is large, when the primary side currents are large, error compensation on the secondary side currents is small, and accordingly the error curve of the secondary side currents is in a stable state, and measuring accuracy level of the current transformer is improved.
Description
Technical field
The invention belongs to the instrument transformer technical field, specifically relate to a kind of offset-type current transformer.
Background technology
Low-voltage current mutual inductor generally adopts the ordinary silicon steel disc to roll into annular core at present, since the ordinary silicon steel plate iron core when initial permeability lower, at primary side current hour, the induced current error of current transformer is very large, along with the increase of primary side current, the induced current error just reduces gradually.For current ratio be 100/5A to 200/5A than the current transformer of small dimension, at primary side current hour, the error of current transformer is often very large, so that the accuracy class of current transformer is difficult to improve.Therefore at the little current ratio current transformer of ordinary silicon steel plate iron core with the commonsense method coiling, accuracy class is general all below 1 grade.
Summary of the invention
The present invention solves the existing technical problem of above-mentioned prior art, and a kind of offset-type current transformer is provided.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of offset-type current transformer, comprise iron core and the coil that is wound on the iron core, described iron core is made of main iron core and auxiliary iron core, wherein auxiliary iron core is rolled by 2～4 circle silicon steel sheets and forms, be nested with behind the outsourcing insulation crimped paper in the instrument transformer main iron core outside that is surrounded by insulation crimped paper, coil is coiling 5～10 circles on main iron core first, put behind the auxiliary iron core the completeer remaining coil turn of coiling.Because auxiliary iron core lacks around 5～10 circle coils than main iron core, so auxiliary iron core can be exported more stable electric current than the main iron core state that reaches capacity in advance.When the primary side current of current transformer hour, error compensation to secondary side current is larger, and when primary side current is larger, less than normal to the error compensation of secondary side current, therefore so that the error curve level off of secondary side current has improved the class of accuracy that current transformer is measured.
Further, in order to guarantee the stationarity of output current, behind the described auxiliary iron core outsourcing insulation crimped paper, put again the short-circuited conducting sleeve that 2～3 circle diameter 0.5mm fine copper wires are made.
For convenient for assembly, when coiling mutual inductor coil of the present invention, can outside former iron core, peel off 2～4 circle silicon steel sheets as auxiliary iron core, the residue iron core is as the main iron core of instrument transformer, and wrap with insulation crimped paper respectively, wherein behind the auxiliary iron core outsourcing insulation crimped paper, put again the short-circuited conducting sleeve that 2～3 circle diameter 0.5mm fine copper wires are made.During coiling first on main iron core around 5～10 circle coils, this number of turn is decided according to the girth of auxiliary iron core and the size of primary side current, when less the and primary side current of the girth of auxiliary iron core is larger, this number of turn can be got less numerical value, otherwise then to get larger numerical value, finally need to adjust accordingly according to the error testing result; After putting auxiliary iron core, the complete remaining coil turn of coiling again guarantees on the main iron core identical on the coil turn and former iron core.The mutual inductor coil accuracy class of the present invention of making of said method can reach 0.5 grade and more than.
Workinprocess cost of the present invention increases in few situation, and the class of accuracy that current transformer is measured significantly improves, and production technology is simple, has improved qualification rate and the accuracy class of product, and properties of product are stable.Therefore the present invention has the characteristics such as simple in structure, reasonable in design.
Description of drawings
Fig. 1 is a kind of structural representation of auxiliary iron core of the present invention;
Fig. 2 is a kind of assembly structure schematic diagram of the present invention.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: referring to Fig. 1 and Fig. 2, the present invention includes iron core and the coil 4 that is wound on the iron core, iron core is made of main iron core 3 and auxiliary iron core 1, wherein auxiliary iron core 1 is rolled by 2～4 circle silicon steel sheets and forms, be nested with in instrument transformer main iron core 3 outsides that are surrounded by insulation crimped paper behind the outsourcing insulation crimped paper, coil 4 is coiling 5～10 circles on main iron core first, put behind the auxiliary iron core the completeer remaining coil turn of coiling.Because auxiliary iron core lacks around 5～10 circle coils than main iron core, so auxiliary iron core can be exported more stable electric current than the main iron core state that reaches capacity in advance.When the primary side current of current transformer hour, error compensation to secondary side current is larger, and when primary side current is larger, less than normal to the error compensation of secondary side current, therefore so that the error curve level off of secondary side current has improved the class of accuracy that current transformer is measured.Further, in order to guarantee the stationarity of output current, behind the auxiliary iron core outsourcing insulation crimped paper, put again the short-circuited conducting sleeve that 2～3 circle diameter 0.5mm fine copper wires are made.
For convenient for assembly, when coiling mutual inductor coil of the present invention, can outside former iron core, peel off 2～4 circle silicon steel sheets as auxiliary iron core, the residue iron core is as the main iron core of instrument transformer, and wrap with insulation crimped paper respectively, wherein behind the auxiliary iron core outsourcing insulation crimped paper, put again the short-circuited conducting sleeve that 2～3 circle diameter 0.5mm fine copper wires are made.During coiling first on main iron core around 5～10 circle coils, this number of turn is decided according to the girth of auxiliary iron core and the size of primary side current, when less the and primary side current of the girth of auxiliary iron core is larger, this number of turn can be got less numerical value, otherwise then to get larger numerical value, finally need to adjust accordingly according to the error testing result; After putting auxiliary iron core, the complete remaining coil turn of coiling again guarantees on the main iron core identical on the coil turn and former iron core.The mutual inductor coil accuracy class of the present invention of making of said method can reach 0.5 grade and more than.
Workinprocess cost of the present invention increases in few situation, and the class of accuracy that current transformer is measured significantly improves, and production technology is simple, has improved qualification rate and the accuracy class of product, and properties of product are stable.Therefore the present invention has the characteristics such as simple in structure, reasonable in design.
At last, should be pointed out that above embodiment only is the more representational example of the present invention.Obviously, the invention is not restricted to above-described embodiment, many distortion can also be arranged.Every foundation technical spirit of the present invention all should be thought to belong to protection scope of the present invention to any simple modification, equivalent variations and modification that above embodiment does.
Claims (2)
1. offset-type current transformer, comprise iron core and the coil that is wound on the iron core, it is characterized in that described iron core is made of main iron core and auxiliary iron core, wherein auxiliary iron core is rolled by 2～4 circle silicon steel sheets and forms, be nested with behind the outsourcing insulation crimped paper in the instrument transformer main iron core outside that is surrounded by insulation crimped paper, coil is coiling 5～10 circles on main core first, put behind the auxiliary iron core the completeer remaining coil turn of coiling.
2. a kind of offset-type current transformer according to claim 1, it is characterized in that described auxiliary iron core outsourcing insulation crimped paper after, put again the short-circuited conducting sleeve that 2～3 circle diameter 0.5mm fine copper wires are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103355398A CN103366938A (en) | 2013-08-02 | 2013-08-02 | Compensation type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103355398A CN103366938A (en) | 2013-08-02 | 2013-08-02 | Compensation type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103366938A true CN103366938A (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013103355398A Pending CN103366938A (en) | 2013-08-02 | 2013-08-02 | Compensation type current transformer |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87207697U (en) * | 1987-05-05 | 1987-12-26 | 山西省机械设计研究所 | Current compensation device |
| CN2192073Y (en) * | 1994-03-28 | 1995-03-15 | 钱永强 | Improved casing type current mutual-inductor |
| CN2257396Y (en) * | 1996-01-22 | 1997-07-02 | 黎鸣 | Short-circuit type adjustable inducer |
| CN101202161A (en) * | 2007-10-24 | 2008-06-18 | 钱维忠 | Open/close current transformer |
| CN201549350U (en) * | 2009-11-17 | 2010-08-11 | 厦门启和电器有限公司 | Laminated iron core magnetic shunt compensating device of current transformer |
| CN202003823U (en) * | 2010-12-06 | 2011-10-05 | 广东雅达电子股份有限公司 | High-precision micro flux current mutual inductor |
| CN202189670U (en) * | 2011-07-07 | 2012-04-11 | 张逢春 | Combined current converter |
| CN102800463A (en) * | 2012-09-07 | 2012-11-28 | 沧州供电公司 | Current transformer |
| CN203466055U (en) * | 2013-08-02 | 2014-03-05 | 浙江正泰电源电器有限公司 | Compensated current transformer |
-
2013
- 2013-08-02 CN CN2013103355398A patent/CN103366938A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87207697U (en) * | 1987-05-05 | 1987-12-26 | 山西省机械设计研究所 | Current compensation device |
| CN2192073Y (en) * | 1994-03-28 | 1995-03-15 | 钱永强 | Improved casing type current mutual-inductor |
| CN2257396Y (en) * | 1996-01-22 | 1997-07-02 | 黎鸣 | Short-circuit type adjustable inducer |
| CN101202161A (en) * | 2007-10-24 | 2008-06-18 | 钱维忠 | Open/close current transformer |
| CN201549350U (en) * | 2009-11-17 | 2010-08-11 | 厦门启和电器有限公司 | Laminated iron core magnetic shunt compensating device of current transformer |
| CN202003823U (en) * | 2010-12-06 | 2011-10-05 | 广东雅达电子股份有限公司 | High-precision micro flux current mutual inductor |
| CN202189670U (en) * | 2011-07-07 | 2012-04-11 | 张逢春 | Combined current converter |
| CN102800463A (en) * | 2012-09-07 | 2012-11-28 | 沧州供电公司 | Current transformer |
| CN203466055U (en) * | 2013-08-02 | 2014-03-05 | 浙江正泰电源电器有限公司 | Compensated current transformer |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131023 |