CN101692399A - Transient current transformer - Google Patents
Transient current transformer Download PDFInfo
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- CN101692399A CN101692399A CN200910018494A CN200910018494A CN101692399A CN 101692399 A CN101692399 A CN 101692399A CN 200910018494 A CN200910018494 A CN 200910018494A CN 200910018494 A CN200910018494 A CN 200910018494A CN 101692399 A CN101692399 A CN 101692399A
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Abstract
A transient current transformer belongs to the transformer equipment field and comprises a combined iron core (1), a primary winding (6) and a secondary winding (7). The transformer is characterized in that the combined iron core (1) is formed by superposing and combining a compound silicon steel core and an iron core (5) with high initial magnetic permeability, the primary winding (6) directly runs through the central hole of the combined iron core (1), and the secondary winding (7) is uniformly wound on the combined iron core (1). By adopting the structure that the material iron core with high initial magnetic permeability is superposed on the compound silicon steel core, the transient current transformer can simultaneously meet the requirements of measuring accuracy of small signals and transient current transformation and is simple in structure, convenient in machining and good in use effects.
Description
Technical field
Transient current transformer belongs to the instrument transformer apparatus field, is specifically related to a kind of transient current transformer of used for relay protection.
Background technology
There is following defective in the Usual relay protection Current Transformer now: 1, the instrument transformer that adopts the closed loop Wound core to produce; magnetic leakage free; the certainty of measurement of small-signal satisfies easily; but system is short-circuited during fault; short circuit current causes core sataration easily; particularly the remanent magnetism that exists in the existence of DC component or the iron core in the transient process of short circuit current will increase the weight of the saturated of current transformer greatly, causes the malfunction or the tripping of protective device.2, the instrument transformer that adopts EI or ED iron core to produce, because there is air gap in iron core, the remanent magnetism of iron core reduces greatly, has solved the transient state saturation problem preferably, but because leakage field is too big, the certainty of measurement of small-signal can not meet the demands.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provide a kind of and can improve the transient current transformer that the small-signal certainty of measurement can solve the transient state saturation problem again.
The technical solution adopted for the present invention to solve the technical problems is: this transient current transformer, comprise composite type iron core, elementary winding and secondary winding, it is characterized in that: the composite type iron core is formed by comprehensive silicon steel core and high initial magnetic permeability iron core stack combinations, secondary winding evenly is wound on the composite type iron core, elementary winding is a circle only, directly passes composite type core center hole.
The comprehensive silicon steel core comprises silicon steel core and the protection silicon steel core of being with air gap, protection is sleeved on the silicon steel core outside of band air gap with silicon steel core, the strip silicon steel sheet is housed in the slit between two iron cores, integral body of formation is filled up in slit between two iron cores, also can be used for adjusting the size of gaps of air-gap iron core simultaneously.
The silicon steel core of band air gap is involuted by left and right sides two parts, and air gap is left in the centre; Protection is the takeup type iron core of one with silicon steel core.
High initial magnetic permeability iron core is permalloy Wound core or ultracrystallite Wound core.
The iron core of high initial magnetic permeability can solve the small-signal certainty of measurement, and the silicon steel core of band air gap can solve the transient state saturation problem.
Compared with prior art, the beneficial effect that transient current transformer of the present invention had is: adopting superposes on the comprehensive silicon steel core has the structure of high initial magnetic permeability material iron core, make transient current transformer can satisfy the certainty of measurement of small-signal and the requirement of the transient current progress of disease simultaneously, simple in structure, easy to process, result of use is good.
Description of drawings
Fig. 1 is a transient current transformer structural representation of the present invention.
Fig. 2 is a transient current transformer composite type iron core embodiment 1-2 structural representation of the present invention.
Fig. 3 is transient current transformer composite type iron core embodiment 3 structural representations of the present invention.
Wherein: 1, the silicon steel core 3 of composite type iron core 2, band air gap, protection silicon steel core 4, silicon steel sheet 5, high initial magnetic permeability iron core 6, elementary winding 7, secondary winding.
The present invention will be further described below in conjunction with accompanying drawing 1～3:
Embodiment
Fig. 1～2nd, most preferred embodiment of the present invention, with reference to accompanying drawing 1～2:
Transient current transformer comprises composite type iron core 1, elementary winding 6 and secondary winding 7.Composite type iron core 1 is formed by comprehensive silicon steel core and high initial magnetic permeability iron core 5 stack combinations.The comprehensive silicon steel core comprises silicon steel core 2 and the protection silicon steel core 3 of being with air gap, protection is sleeved on silicon steel core 2 outsides of band air gap with silicon steel core 3, insert some strip silicon steel sheets 4 in the slit between two iron cores, thereby make two silicon steel cores form a complete iron core.The comprehensive silicon steel core plastic cement of packing into is protected box or insulated at core exterior surface bag one deck polyester film, and superpose in its lower section one and have the high initial magnetoconductivity iron core 5 that plastic cement protects box insulation, high initial magnetoconductivity iron core 5 is the permalloy Wound core, and two halves were bonded into one about most peripheral was incited somebody to action with adhesive tape.With loop wire winder with secondary winding 7 even coilings to composite type iron core 1, appearance bread one deck polyester film insulating barrier, elementary winding 6 directly passes the iron-core coil centre bore and gets final product.The composite type iron core 1 that is wound with winding is put into the plastic shell epoxy encapsulation, and wherein secondary winding 7 is by lead-in wire or draw pin and draw shell, and elementary winding 6 is drawn shell by lead-in wire.
During use, elementary winding 6 is concatenated in the test line, is used for the ac voltage signal of high level accurately is transformed to low level ac voltage signal, be used for electronic circuit based on microprocessor.
With reference to accompanying drawing 1～2:
Transient current transformer comprises composite type iron core 1, elementary winding 6 and secondary winding 7.Composite type iron core 1 by comprehensive silicon steel core and high initial magnetic permeability iron core about in the of 5 stack combinations form.The comprehensive silicon steel core comprises silicon steel core 2 and the protection silicon steel core 3 of being with air gap, protection is sleeved on silicon steel core 2 outsides of band air gap with silicon steel core 3, insert some strip silicon steel sheets 4 in the slit between two iron cores, thereby make two silicon steel cores form a complete iron core.The comprehensive silicon steel core plastic cement of packing into is protected box or insulated at core exterior surface bag one deck polyester film, and superpose in the above one and have the iron core 5 that plastic cement protects box insulation high initial magnetoconductivity, the iron core 5 of high initial magnetoconductivity is the ultracrystallite Wound core, and two halves were bonded into one about most peripheral was incited somebody to action with adhesive tape.With loop wire winder with secondary winding 7 even coilings to composite type iron core 1, appearance bread one deck polyester film insulating barrier, elementary winding 6 directly passes the iron-core coil centre bore and gets final product.The composite type iron core 1 that is wound with winding is put into the plastic shell epoxy encapsulation, and wherein secondary winding 7 is by lead-in wire or draw pin and draw shell, and elementary winding 6 is drawn shell by lead-in wire.
Occupation mode is identical with embodiment 1.
With reference to accompanying drawing 3:
Transient current transformer comprises composite type iron core 1, elementary winding 6 and secondary winding 7.Composite type iron core 1 is combined by comprehensive silicon steel core and high initial magnetic permeability iron core 5.The comprehensive silicon steel core comprises silicon steel core 2 and the protection silicon steel core 3 of being with air gap, will protect the silicon steel core 2 and high initial magnetic permeability iron core 5 outsides that are sleeved on the band air gap with silicon steel core 3 after the silicon steel core 2 of band air gap and high initial magnetic permeability iron core 5 superpose up and down.The iron core 5 of high initial magnetoconductivity is permalloy Wound core or ultracrystallite Wound core, high initial magnetic permeability iron core 5 and protection are filled and led up with elastic gum with the slit of 3 of silicon steel cores, be with the silicon steel core 2 of air gap and protect the some strip silicon steel sheets 4 of insertion in the slit of using 3 of silicon steel cores, thereby make two silicon steel cores form a complete iron core.Composite type iron core 1 plastic cement of packing into is protected box or insulated at core exterior surface bag one deck polyester film.With loop wire winder with secondary winding 7 even coilings to composite type iron core 1, appearance bread one deck polyester film insulating barrier, elementary winding 6 directly passes the iron-core coil centre bore and gets final product.The composite type iron core 1 that is wound with winding is put into the plastic shell epoxy encapsulation, and wherein secondary winding 7 is by lead-in wire or draw pin and draw shell, and elementary winding 6 is drawn shell by lead-in wire.
Occupation mode is identical with embodiment 1.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection range of technical solution of the present invention according to technical spirit of the present invention.
Claims (4)
1. transient current transformer, comprise composite type iron core (1), elementary winding (6) and secondary winding (7), it is characterized in that: composite type iron core (1) is formed by comprehensive silicon steel core and high initial magnetic permeability iron core (5) stack combinations, elementary winding (6) directly passes composite type iron core (1) centre bore, and secondary winding (7) evenly is wound on the composite type iron core (1).
2. transient current transformer according to claim 1, it is characterized in that: the comprehensive silicon steel core comprises silicon steel core (2) and the protection silicon steel core (3) of being with air gap, protection is sleeved on outside the silicon steel core (2) of band air gap with silicon steel core (3), and strip silicon steel sheet (4) is housed in the slit between two iron cores.
3. transient current transformer according to claim 2 is characterized in that: the silicon steel core (2) of band air gap is involuted by left and right sides two parts, and air gap is left in the centre; Protection is the takeup type iron core of one with silicon steel core (3).
4. transient current transformer according to claim 1 is characterized in that: high initial magnetic permeability iron core (5) is permalloy Wound core or ultracrystallite Wound core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910018494A CN101692399A (en) | 2009-09-30 | 2009-09-30 | Transient current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910018494A CN101692399A (en) | 2009-09-30 | 2009-09-30 | Transient current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101692399A true CN101692399A (en) | 2010-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910018494A Pending CN101692399A (en) | 2009-09-30 | 2009-09-30 | Transient current transformer |
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| Country | Link |
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| CN (1) | CN101692399A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500635A (en) * | 2013-09-23 | 2014-01-08 | 保定天威互感器有限公司 | Bushing current transformer |
| CN104064343A (en) * | 2014-07-02 | 2014-09-24 | 北京德威特继保自动化科技股份有限公司 | Current mutual inductance device and current transformer |
| CN105826067A (en) * | 2016-05-19 | 2016-08-03 | 中国电力科学研究院 | Current transformer |
| CN105977005A (en) * | 2016-06-12 | 2016-09-28 | 嘉兴威士顿电子科技有限公司 | Assembly method of current transformer and current transformer |
| CN107907727A (en) * | 2017-12-26 | 2018-04-13 | 深圳市艾华迪技术有限公司 | Double-iron core closed-loop current sensors |
-
2009
- 2009-09-30 CN CN200910018494A patent/CN101692399A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103500635A (en) * | 2013-09-23 | 2014-01-08 | 保定天威互感器有限公司 | Bushing current transformer |
| CN104064343A (en) * | 2014-07-02 | 2014-09-24 | 北京德威特继保自动化科技股份有限公司 | Current mutual inductance device and current transformer |
| CN105826067A (en) * | 2016-05-19 | 2016-08-03 | 中国电力科学研究院 | Current transformer |
| CN105826067B (en) * | 2016-05-19 | 2023-12-26 | 中国电力科学研究院 | Current Transformer |
| CN105977005A (en) * | 2016-06-12 | 2016-09-28 | 嘉兴威士顿电子科技有限公司 | Assembly method of current transformer and current transformer |
| CN107907727A (en) * | 2017-12-26 | 2018-04-13 | 深圳市艾华迪技术有限公司 | Double-iron core closed-loop current sensors |
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Open date: 20100407 |