CN103187160B - Combination enwinding type current transformer and preparation method thereof - Google Patents
Combination enwinding type current transformer and preparation method thereof Download PDFInfo
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- CN103187160B CN103187160B CN201310140342.9A CN201310140342A CN103187160B CN 103187160 B CN103187160 B CN 103187160B CN 201310140342 A CN201310140342 A CN 201310140342A CN 103187160 B CN103187160 B CN 103187160B
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Abstract
The invention discloses a kind of combination enwinding type current transformer and preparation method thereof, described current transformer includes electromagnetic induction coil, described electromagnetic induction coil is wrapped on alloy core, described electromagnetic induction coil is externally provided with coil covering, the two ends of described electromagnetic induction coil lead to binding post, wherein, described electromagnetic induction coil includes whole numbers of turns loop and fractional turns loop, described whole numbers of turns loop is formed by the first copper wire winding, and described fractional turns loop is formed by the second copper cash and the 3rd copper wire winding. Combination enwinding type current transformer provided by the invention and preparation method thereof, adopt the winding structure that whole circle combines with point circle, the purpose of compression electromagnetic induction coil size and Adjustment precision is reached, thus improving the precision of current transformer by adjusting the number of turn of fractional turns.
Description
Technical field
The present invention relates to a kind of current transformer and preparation method thereof, particularly relate to a kind of combination enwinding type current transformer and preparation method thereof.
Background technology
Current transformer error compensation method conventional at present has the compensation of whole circle, fractional turns compensation, magnetic shunt compensation etc. For the product that number of ampere turns is bigger, take the compensation method commonly used can meet error limit requirement. But existing compensation is respectively present following defect for high precision current transformer:
1) whole circle compensates: cannot be modulated by numerical value greatly in the scope specified due to the little compensation numerical value of no-load voltage ratio; 2) fractional turns compensates: because iron core itself needs exciting current, therefore current transformer is when uncompensation, and current error is generally minus tolerance. A piece secondary wiring is generally divided into two or the many coilings that the transversal gross area is identical by existing fractional turns compensation way, by adjust therein one to regulating error. Owing to existing method is two coilings simultaneously, take up room relatively big, so have compressed the cross section of iron core, so that iron core is saturated in advance; 3) magnetic shunt compensation: be only applicable to silicon steel plate core product.
Therefore, existing compensation is all each defective for high precision current transformer, therefore, it is necessary to provide a kind of combination enwinding type current transformer and preparation method thereof, fractional turns can be used in limited space to compensate, and improve core section, drop low magnetic density, produce high accuracy transformer.
Summary of the invention
The technical problem to be solved is to provide a kind of combination enwinding type current transformer and preparation method thereof, it is possible to is effectively compressed electromagnetic induction coil size, and improves the precision of current transformer.
The present invention solves that above-mentioned technical problem employed technical scheme comprise that offer one combination enwinding type current transformer, including electromagnetic induction coil, described electromagnetic induction coil is wrapped on alloy core, described electromagnetic induction coil is externally provided with coil covering, the two ends of described electromagnetic induction coil lead to binding post, wherein, described electromagnetic induction coil includes whole numbers of turns loop and fractional turns loop, described whole numbers of turns loop is formed by the first copper wire winding, and described fractional turns loop is formed by the second copper cash and the 3rd copper wire winding.
Combinations of the above enwinding type current transformer, wherein, the coiling number of turn of described whole numbers of turns loop is N-n; The coiling number of turn of described fractional turns loop is n, n > 1, N is total number of turns.
Combinations of the above enwinding type current transformer, wherein, described first copper cash is the copper cash of diameter 1.8mm, and described second copper cash is the copper cash of diameter 1.12mm, and described 3rd copper cash is the copper cash of diameter 1.45mm; The coiling number of turn n of described fractional turns loop is 20��60, and total number of turns N is 120.
Combinations of the above enwinding type current transformer, wherein, described alloy core is that ultramicro-crystal alloy is unshakable in one's determination.
Combinations of the above enwinding type current transformer, wherein, described coil covering is PET insulating barrier.
The present invention solves that above-mentioned technical problem also provides for a kind of manufacture method combining enwinding type current transformer, comprise the steps: a) first on alloy core, to utilize the first copper wire winding whole numbers of turns loop; B) then use the second copper cash instead and the 3rd copper wire winding residue number of turn forms fractional turns loop; C) it is externally provided with coil covering around the electromagnetic induction coil made and alloy core, welds binding post.
The preparation method of combinations of the above enwinding type current transformer, wherein, described first copper cash is the copper cash of diameter 1.8mm, and described second copper cash is the copper cash of diameter 1.12mm, and described 3rd copper cash is the copper cash of diameter 1.45mm; The coiling number of turn n of described fractional turns loop is 20,40 or 60, and total number of turns N is 120.
The present invention contrasts prior art following beneficial effect: combination enwinding type current transformer provided by the invention and preparation method thereof, adopt the winding structure that whole circle combines with point circle, the purpose of compression electromagnetic induction coil size and Adjustment precision is reached, thus improving the precision of current transformer by adjusting the number of turn of fractional turns.
Accompanying drawing explanation
Fig. 1 is that the present invention combines enwinding type current transformer structure schematic diagram;
Fig. 2 is the combination coiling schematic diagram of electromagnetic induction coil in Fig. 1.
In figure:
1 coil covering 2 whole numbers of turns loop 3 fractional turns loop
4 alloy core 5 binding posts
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is that the present invention combines enwinding type current transformer structure schematic diagram.
Refer to Fig. 1, combination enwinding type current transformer provided by the invention includes electromagnetic induction coil, described electromagnetic induction coil is wrapped on alloy core 4, described electromagnetic induction coil is externally provided with coil covering 1, the two ends of described electromagnetic induction coil lead to binding post 5, wherein, described electromagnetic induction coil includes whole numbers of turns loop 2 and fractional turns loop 3, described whole numbers of turns loop 2 is formed by the first copper wire winding, and described fractional turns loop 3 is formed by the second copper cash and the 3rd copper wire winding.
Combination enwinding type current transformer provided by the invention, wherein, the coiling number of turn of described whole numbers of turns loop 2 is N-n; The coiling number of turn of described fractional turns loop 3 is n, n > 1, N is total number of turns; Described first line processed can be the copper cash of diameter 1.8mm, and described second copper cash is the copper cash of diameter 1.12mm, and described 3rd copper cash is the copper cash of diameter 1.45mm; The coiling number of turn n of described fractional turns loop 3 is 20��60, and total number of turns N is 120.
Combinations of the above enwinding type current transformer, described coil covering 1 is PET (Polyethyleneterephthalate) insulating barrier;Described alloy core 4 is preferably the ultramicro-crystal alloy ferrum heart; Ultracrystallite is also known as nano amorphous, ultracrystalline magnetic core has higher saturation induction density, high magnetic permeability, low-coercivity, low-loss and good stability, wearability, corrosion resistance, have relatively low price simultaneously, all of metal soft magnetic material core has the cost performance of the best, replace silicon steel, permalloy and ferrite, be widely used in and make various types of transformer iron core.
The present invention also provides for a kind of preparation method combining enwinding type current transformer, please referring also to Fig. 1 and Fig. 2, comprises the steps:
Step S1: first utilize the first copper wire winding whole numbers of turns loop 2 on alloy core 4;
Step S2: then use the second copper cash instead and the 3rd copper wire winding residue number of turn forms fractional turns loop 3; Such as, for 600/5A transformer, the first copper cash can be selected for the copper cash of diameter 1.8mm, and described second copper cash can be selected for the copper cash of diameter 1.12mm, and described 3rd copper cash is the copper cash of diameter 1.45mm; Specified total number of turns N is 120 circles, compensates the number of turn, and namely the coiling number of turn n of fractional turns loop 3 can adjust flexibly, such as coiling 20,40 or 60;
Step S3: be externally provided with coil covering 1 around the electromagnetic induction coil made and alloy core 4, welding binding post 5, two termination respectively S1 and S2.
In sum, combination enwinding type current transformer provided by the invention and preparation method thereof, adopt the winding structure that whole numbers of turns loop 2 combines with fractional turns loop 3, the compensation number of turn of fractional turns loop 3 can be set as the arbitrary value of 1��n according to actual needs, to realize the different control compensated under circle coil dimension and error transfer factor, meet the high-precision requirement of current transformer, reach the purpose of compression electromagnetic induction coil size and Adjustment precision simultaneously.
Although the present invention discloses as above with preferred embodiment; so it is not limited to the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when with being as the criterion that claims define.
Claims (3)
1. a combination enwinding type current transformer, including electromagnetic induction coil, described electromagnetic induction coil is wrapped on alloy core (4), described electromagnetic induction coil is externally provided with coil covering (1), the two ends of described electromagnetic induction coil lead to binding post (5), it is characterized in that, described electromagnetic induction coil includes whole numbers of turns loop (2) and fractional turns loop (3), described whole numbers of turns loop (2) is formed by the first copper wire winding, and described fractional turns loop (3) is formed by the second copper cash and the 3rd copper wire winding; The coiling number of turn of described whole numbers of turns loop (2) is N-n; The coiling number of turn of described fractional turns loop (3) is n, n > 1, N is total number of turns; Described first copper cash is the copper cash of diameter 1.8mm, and described second copper cash is the copper cash of diameter 1.12mm, the copper cash of described 3rd copper wire diameter 1.45mm; The coiling number of turn n of described fractional turns loop (3) is 20��60, and total number of turns N is 120; Described coil covering (1) is PET insulating barrier; Described alloy core (4) is unshakable in one's determination for ultramicro-crystal alloy.
2. the preparation method of a combination enwinding type current transformer as claimed in claim 1, it is characterised in that comprise the steps:
A) first on alloy core (4), the first copper wire winding whole numbers of turns loop (2) is utilized;
B) then use the second copper cash instead and the 3rd copper wire winding residue number of turn forms fractional turns loop (3);
C) it is being externally provided with coil covering (1), welding binding post (5) around the electromagnetic induction coil made and alloy core (4).
3. the preparation method combining enwinding type current transformer as claimed in claim 2, it is characterised in that described first copper cash is the copper cash of diameter 1.8mm, and described second copper cash is the copper cash of diameter 1.12mm, and described 3rd copper cash is the copper cash of diameter 1.45mm; The coiling number of turn n of described fractional turns loop (3) is 20,40 or 60, and total number of turns N is 120.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310140342.9A CN103187160B (en) | 2013-04-18 | 2013-04-18 | Combination enwinding type current transformer and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310140342.9A CN103187160B (en) | 2013-04-18 | 2013-04-18 | Combination enwinding type current transformer and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103187160A CN103187160A (en) | 2013-07-03 |
| CN103187160B true CN103187160B (en) | 2016-06-08 |
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| CN201310140342.9A Expired - Fee Related CN103187160B (en) | 2013-04-18 | 2013-04-18 | Combination enwinding type current transformer and preparation method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111929736B (en) * | 2020-09-14 | 2021-01-19 | 北京唯智佳辰科技发展有限责任公司 | Asymmetric fractional turn coil winding method for measuring alternating magnetic field |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2123810U (en) * | 1992-04-24 | 1992-12-02 | 抚顺市电业技术工程服务部 | Wide load current mutual-inductor |
| CN201638670U (en) * | 2009-12-28 | 2010-11-17 | 上海卓高电气有限公司 | Low-current ratio current transformer for GIS |
| CN102360891A (en) * | 2011-10-25 | 2012-02-22 | 保定天威集团有限公司 | Multi-transformation ratio current transformer |
| CN102751081A (en) * | 2012-07-03 | 2012-10-24 | 深圳市创银科技股份有限公司 | Flexible coil current transformer and production method thereof |
| CN203165656U (en) * | 2013-04-18 | 2013-08-28 | 南京智达电气有限公司 | Combined winding type current transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6450512A (en) * | 1987-08-21 | 1989-02-27 | Pioneer Electronic Corp | Power transformer |
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2013
- 2013-04-18 CN CN201310140342.9A patent/CN103187160B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2123810U (en) * | 1992-04-24 | 1992-12-02 | 抚顺市电业技术工程服务部 | Wide load current mutual-inductor |
| CN201638670U (en) * | 2009-12-28 | 2010-11-17 | 上海卓高电气有限公司 | Low-current ratio current transformer for GIS |
| CN102360891A (en) * | 2011-10-25 | 2012-02-22 | 保定天威集团有限公司 | Multi-transformation ratio current transformer |
| CN102751081A (en) * | 2012-07-03 | 2012-10-24 | 深圳市创银科技股份有限公司 | Flexible coil current transformer and production method thereof |
| CN203165656U (en) * | 2013-04-18 | 2013-08-28 | 南京智达电气有限公司 | Combined winding type current transformer |
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| CN103187160A (en) | 2013-07-03 |
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