CN104637662A - Accuracy-adjustable multi-current-ratio transformer - Google Patents
Accuracy-adjustable multi-current-ratio transformer Download PDFInfo
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- CN104637662A CN104637662A CN201510092745.XA CN201510092745A CN104637662A CN 104637662 A CN104637662 A CN 104637662A CN 201510092745 A CN201510092745 A CN 201510092745A CN 104637662 A CN104637662 A CN 104637662A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 86
- 230000035699 permeability Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 12
- 239000000696 magnetic material Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The invention relates to an accuracy-adjustable multi-current-ratio transformer which mainly comprises a rectangular magnetic conducting frame, wiring columns, a primary coil and a second coil. A primary iron core and a secondary iron core are arranged on two opposite long sides of the magnetic conducting frame respectively, an adjusting screw is coupled on each iron core, a lead pipe is arranged at one end of each screw, extends inwards from the peripheral wall of the corresponding screw and extends out to the end of the magnetic conducting frame along a rotating shaft of the corresponding screw, the primary coil and the secondary coil are wound on the screws of the primary iron core and the secondary iron core along threads respectively, and one ends of the coils are connected on one wiring column of the iron cores while the other ends of the same extend the end of the magnetic conducting frame through the lead pipe and are connected on the other wiring column of the iron cores. Continuous adjusting of current ratio can be realized without reopening and re-closing a circuit, and self accuracy of the current transformer can be changed continuously.
Description
Technical field
The present invention relates to a kind of current transformer, especially, is that a kind of multiple current compares current transformer.
Background technology
Current transformer is a kind of common equipment measuring current strength, and common current transformer includes single current ratio current transformer, multiple current than current transformer and many iron core current transformers; First and second umber of turn of single current ratio instrument transformer is fixed, and current ratio cannot change, and can only realize the conversion of a kind of current ratio, because current ratio is fixed, the scope of application of this instrument transformer is comparatively narrow; Common many iron core current transformers have multiple secondary winding separately with iron core, the adjustment of precision is realized by the secondary winding connecting different magnetic permeability, when actual Adjustment precision, need repeatedly to disconnect, bonded circuitry, operate comparatively loaded down with trivial details, simultaneously because the magnetic permeability of often kind of iron core is fixed, precision can only adjust fixing several, cannot realize continuous setup; In addition, need to carry to organize iron core, comparatively inconvenience more; And common multiple current has the different secondary winding of many groups number of turn than instrument transformer, by connecting different terminals to change current ratio; This instrument transformer cannot realize continuous adjustment equally, and each switch current, than all needing disconnection, bonded circuitry, the at substantial time, affects normal power supply; Each folding circuit, in iron core, magnetic flux will be undergone mutation, and easily accelerate the aging of the coil around the home on iron core, shorten the life-span of instrument transformer simultaneously.
Summary of the invention
For the problems referred to above, the invention provides the adjustable multiple current of a kind of precision and compare instrument transformer, this current transformer can realize the continuous adjustment of current ratio without the need to folding circuit again, and this current transformer can continuously change self precision simultaneously, can adapt to various required precision.
For solving the problem, the technical solution adopted in the present invention is: this precision is adjustable, and multiple current includes rectangular magnetic conduction frame, binding post, primary winding and secondary coil than instrument transformer; The long limit that described magnetic conduction frame two is relative is respectively an iron core and secondary iron core, and two above-mentioned iron cores are coupling respectively an adjusting screw(rod); Two described adjusting screw(rod)s respectively with the dead in line of an iron core and secondary iron core; Described adjusting screw(rod) freely can rotate relative to iron core around own torque; Offer conduit in one end of described adjusting screw(rod), described conduit to extend internally and rotating shaft along adjusting screw(rod) extend out to magnetic conduction frame end from the perisporium of adjusting screw(rod); Primary winding and secondary coil are threadingly wrapped on the adjusting screw(rod) of an iron core and secondary iron core respectively, one end of two coils be connected respectively two iron cores a binding post on, the other end stretches out the end of magnetic conduction frame respectively by two conduits and to be correspondingly connected on another binding post of two iron cores.
The invention has the beneficial effects as follows: in use the two ends of circuit under test are connected on two binding posts of an iron core, test instrumentation is connected on two binding posts of secondary iron core; Current ratio now on an iron core and secondary iron core is the coil ratio of an iron core and secondary iron core; When needs increase current ratio, rotate the adjusting screw(rod) on secondary iron core; Secondary coil is wound around on secondary iron core with the rotation of adjusting screw(rod), and the coil turn now on secondary iron core becomes large, and then realizes the increase of current ratio, when current ratio turned down by needs, and reverse rotation adjusting screw(rod); When needing the precision improving instrument transformer, rotate the adjusting screw(rod) on an iron core; Primary winding is wound around on an iron core with the rotation of adjusting screw(rod), coil turn now on an iron core becomes large, the number of ampere turns of an iron core becomes large, the corresponding raising of precision of instrument transformer, the number of turn again regulating the adjusting screw(rod) on secondary iron core to increase secondary coil can recover original current ratio; When precision turned down by needs, reverse operating.
Structure of the present invention is simple, easy to carry; Without the need to open circuit in whole adjustment process, do not affect the normal use of electric wire; Only corresponding adjusting screw(rod) need be rotated when changing current ratio and precision, simple to operate; More outstanding, the present invention can regulate current ratio and precision continuously.
As preferably, described magnetic conduction frame uses ultracrystallite permeability magnetic material to make; This material has good magnetic permeability and good temperature stability, effectively can improve the precision of instrument transformer and extend useful life of iron core.
As preferably, a minor face of described magnetic conduction frame is provided with precision adjusting mechanism; Described precision adjusting mechanism includes a fixed rotating shaft and two adjustable columns be set on this fixed rotating shaft; The end face of two described adjustable columns is close to and each adjustable column freely can rotate around axle; Described fixed rotating shaft is parallel with the minor face of magnetic conduction frame; Two described adjustable columns are axially divided semicolumn symmetrical in a pair, and only have a semicolumn to adopt permeability magnetic material to make in often pair of semicolumn, the semicolumn made by permeability magnetic material is half conducting magnetic column; Rotate two adjustable columns when needs degree of regulation, when two adjustable columns half conducting magnetic column just pair time, the magnetic conduction cross section in magnetic conduction frame is maximum, and now the precision of instrument transformer is the highest; Along with adjustable column rotates relatively around fixed rotating shaft, the just right area of half conducting magnetic column reduces gradually, and the magnetic conduction cross section now in magnetic conduction frame reduces gradually, and namely the precision of instrument transformer declines gradually.
As preferably, the perisporium of described secondary iron core offers vertical bar shape lines, the axis being parallel of described vertical bar shape lines and secondary iron core; This lines can reduce the friction of coil and iron core perisporium, also can slide along iron core easily so that coil is wrapped on iron core under the rotation of adjusting screw(rod).
Accompanying drawing explanation
Fig. 1 is the structural representation of the adjustable multiple current of this precision than an instrument transformer embodiment.
Fig. 2 is the amplification perspective view of middle precision adjusting mechanism embodiment illustrated in fig. 1.
Fig. 3 is the structure for amplifying schematic diagram of middle adjusting screw(rod) embodiment illustrated in fig. 1.
Embodiment
Embodiment
In embodiment shown in Fig. 1 to Fig. 3, this precision is adjustable, and multiple current includes rectangular magnetic conduction frame 6, binding post 4, primary winding 11 and secondary coil 21 than instrument transformer; Described magnetic conduction frame 6 uses ultracrystallite permeability magnetic material to make; The long limit that described magnetic conduction frame 6 two is relative is respectively an iron core 1 and secondary iron core 2, and an iron core 1 and secondary iron core 2 are fixed with two binding posts 4 respectively; Two above-mentioned iron cores are also coupling respectively an adjusting screw(rod) 5; Two described adjusting screw(rod)s 5 respectively with the dead in line of an iron core 1 and secondary iron core 2; Described adjusting screw(rod) 5 freely can rotate relative to iron core around own torque; Conduit 51 is offered in one end of described adjusting screw(rod) 5, described conduit 51 to extend internally and rotating shaft along adjusting screw(rod) 5 extend out to magnetic conduction frame 6 end from the perisporium of adjusting screw(rod) 5, in Fig. 3, dotted line is the axis of adjusting screw(rod) 5, Fig. 3 illustrate only the part of conduit 51 in adjusting screw(rod) 5, and the part that conduit 51 extends in magnetic conduction frame 6 can be observed in FIG; The perisporium of described secondary iron core 2 also offers vertical bar shape lines, the axis being parallel of described vertical bar shape lines and secondary iron core 2; Primary winding 11 and secondary coil 21 are threadingly wrapped on the adjusting screw(rod) 5 of an iron core 1 and secondary iron core 2 respectively, one end of two coils be connected respectively two iron cores a binding post 4 on, the other end stretches out the end of magnetic conduction frame 6 respectively by two conduits 51 and is correspondingly connected on another binding post 4 of two iron cores; As shown in the parts that dotted line frame in Fig. 1 surrounds, a minor face of described magnetic conduction frame 6 is provided with precision adjusting mechanism 3; As shown in Figure 2, described precision adjusting mechanism 3 includes a fixed rotating shaft 32 and two adjustable columns 31 be set on this fixed rotating shaft 32, and for ease of observing, the distance between two adjustable columns 31 is separately comparatively large, and its actual range as shown in Figure 1; The end face of two described adjustable columns 31 is close to and each adjustable column 31 freely can rotate around axle; Described fixed rotating shaft 32 is parallel with the minor face of magnetic conduction frame 6; Two described adjustable columns 31 are axially divided semicolumn symmetrical in a pair, and only have a semicolumn to adopt permeability magnetic material to make in often pair of semicolumn, the semicolumn made by permeability magnetic material is half conducting magnetic column 311.
In use the two ends of circuit under test are connected on two binding posts 4 of an iron core 1, test instrumentation are connected on two binding posts 4 of secondary iron core 2; Current ratio now on an iron core 1 and secondary iron core 2 is the coil ratio of an iron core 1 and secondary iron core 2; When needs increase current ratio, rotate the adjusting screw(rod) 5 on secondary iron core 2; Along with the rotation of adjusting screw(rod) 5, the number of turn of secondary coil 21 increases gradually, and the coil of increase is along screw thread constantly movement, and when coil is too much, unnecessary coil winding is on secondary iron core 2; Perisporium due to secondary coil 21 offers vertical bar shape lines, this lines can effectively reduce the frictional force of coil and secondary iron core 2, this makes secondary coil 21 easily can slide on secondary iron core 2, effectively prevents the coil accumulation because the number of turn too much causes, entanglement; Along with the coil turn on secondary iron core 2 increases, the current ratio of this instrument transformer increases; When current ratio turned down by needs, reverse rotation adjusting screw(rod) 5; When needing the precision changing instrument transformer, relatively rotate two adjustable columns 31; When two adjustable columns 31 half conducting magnetic column 311 just pair time, the magnetic conduction cross section in magnetic conduction frame 6 is maximum, and the flux change in magnetic conduction frame 6 is maximum, and now the precision of instrument transformer is the highest; If desired the precision of instrument transformer is reduced, rotating two adjustable columns 31 makes two and half conducting magnetic columns 311 misplace, along with adjustable column 31 rotates relatively around fixed rotating shaft 32, the just right area of half conducting magnetic column 311 reduces gradually, magnetic conduction cross section now in magnetic conduction frame 6 reduces gradually, and namely the precision of instrument transformer declines gradually; When precision heightened by needs, reverse operating; Can realize fixed current than the precision adjustment under condition by rotating adjustable column 31, namely in precision adjustment process, the current ratio of instrument transformer does not change, and is convenient to staff's analysis circuit fault; In addition, also have a kind of method can degree of regulation: to rotate the adjusting screw(rod) 5 on an iron core 1; Primary winding 11 is wound around on an iron core 1 with the rotation of adjusting screw(rod) 5, coil turn on an iron core 1 becomes large, the number of ampere turns of an iron core 1 becomes large, the corresponding raising of precision of instrument transformer, again regulates the adjusting screw(rod) 5 on secondary iron core 2 can recover original current ratio; When precision turned down by needs, reverse operating.
Structure of the present invention is simple, easy to carry; Without the need to open circuit in whole adjustment process, do not affect the normal use of electric wire; Corresponding adjusting screw(rod) 5 and adjustable column 31 only need be rotated when changing current ratio and precision, simple to operate; More outstanding, the present invention can regulate current ratio and precision continuously without the need to changing instrument transformer.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the adjustable multiple current of precision is than an instrument transformer, and this precision is adjustable, and multiple current includes rectangular magnetic conduction frame (6), binding post (4), primary winding (11) and secondary coil (21) than instrument transformer; The long limit that described magnetic conduction frame (6) two is relative is respectively an iron core (1) and secondary iron core (2), it is characterized in that: be coupling respectively an adjusting screw(rod) (5) on two above-mentioned iron cores; Two described adjusting screw(rod)s (5) respectively with the dead in line of an iron core (1) and secondary iron core (2); Described adjusting screw(rod) (5) freely can rotate relative to iron core around own torque; Offer conduit (51) in one end of described adjusting screw(rod) (5), described conduit (51) to extend internally and rotating shaft along adjusting screw(rod) extend out to magnetic conduction frame (6) end from the perisporium of adjusting screw(rod); Primary winding (11) and secondary coil (21) are threadingly wrapped on the adjusting screw(rod) (5) of an iron core (1) and secondary iron core (2) respectively, one end of two coils be connected respectively two iron cores a binding post (4) on, the other end stretches out the end of magnetic conduction frame (6) respectively by two conduits (51) and to be correspondingly connected on another binding post (4) of two iron cores.
2. the adjustable multiple current of precision according to claim 1 is than instrument transformer, it is characterized in that: described magnetic conduction frame (6) uses ultracrystallite permeability magnetic material to make.
3. the adjustable multiple current of precision according to claim 2 is than instrument transformer, it is characterized in that: on a minor face of described magnetic conduction frame (6), be provided with precision adjusting mechanism (3); Described precision adjusting mechanism (3) includes a fixed rotating shaft (32) and two adjustable columns (31) be set on this fixed rotating shaft (32); The end face of two described adjustable columns (31) is close to and each adjustable column (31) freely can rotate around axle; Described fixed rotating shaft (32) is parallel with the minor face of magnetic conduction frame (6); Two described adjustable columns (31) are axially divided semicolumn symmetrical in a pair, and only have a semicolumn to adopt permeability magnetic material to make in often pair of semicolumn, the semicolumn made by permeability magnetic material is half conducting magnetic column (311).
4. the adjustable multiple current of precision according to claim 3 is than instrument transformer, it is characterized in that: on the perisporium of described secondary iron core (2), offer vertical bar shape lines, the axis being parallel of described vertical bar shape lines and secondary iron core (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092745.XA CN104637662B (en) | 2015-03-02 | 2015-03-02 | Precision is adjustable many current ratio transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092745.XA CN104637662B (en) | 2015-03-02 | 2015-03-02 | Precision is adjustable many current ratio transformer |
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| Publication Number | Publication Date |
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| CN104637662A true CN104637662A (en) | 2015-05-20 |
| CN104637662B CN104637662B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510092745.XA Expired - Fee Related CN104637662B (en) | 2015-03-02 | 2015-03-02 | Precision is adjustable many current ratio transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098034A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | It is a kind of to rotate power supply structure and using the clamshell cleaning machine for having the power supply structure |
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|---|---|---|---|---|
| CN1591711A (en) * | 2003-08-30 | 2005-03-09 | 薛建仁 | Rotary iron cored type adjustable reactor |
| CN102306533A (en) * | 2011-05-20 | 2012-01-04 | 中国科学院长春光学精密机械与物理研究所 | High-power adjustable inductor |
| CN102623160A (en) * | 2012-05-07 | 2012-08-01 | 安徽互感器有限公司 | Epoxy resin poured insulated totally-enclosed current transformer of 35kV and below |
| CN102709034A (en) * | 2012-01-04 | 2012-10-03 | 吴江市东泰电力特种开关有限公司 | On-load continuous transformer |
| CN202678085U (en) * | 2012-04-15 | 2013-01-16 | 河南省电力公司南阳供电公司 | Adjustable transformation ratio type current transformer |
| CN204375557U (en) * | 2015-03-02 | 2015-06-03 | 周午贤 | Precision is adjustable, and multiple current compares instrument transformer |
-
2015
- 2015-03-02 CN CN201510092745.XA patent/CN104637662B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1591711A (en) * | 2003-08-30 | 2005-03-09 | 薛建仁 | Rotary iron cored type adjustable reactor |
| CN102306533A (en) * | 2011-05-20 | 2012-01-04 | 中国科学院长春光学精密机械与物理研究所 | High-power adjustable inductor |
| CN102709034A (en) * | 2012-01-04 | 2012-10-03 | 吴江市东泰电力特种开关有限公司 | On-load continuous transformer |
| CN202678085U (en) * | 2012-04-15 | 2013-01-16 | 河南省电力公司南阳供电公司 | Adjustable transformation ratio type current transformer |
| CN102623160A (en) * | 2012-05-07 | 2012-08-01 | 安徽互感器有限公司 | Epoxy resin poured insulated totally-enclosed current transformer of 35kV and below |
| CN204375557U (en) * | 2015-03-02 | 2015-06-03 | 周午贤 | Precision is adjustable, and multiple current compares instrument transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098034A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | It is a kind of to rotate power supply structure and using the clamshell cleaning machine for having the power supply structure |
| CN110098034B (en) * | 2018-01-31 | 2024-02-20 | 宁波方太厨具有限公司 | Rotary power supply structure and flip type cleaning machine with same |
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| CN104637662B (en) | 2016-08-24 |
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Inventor after: Lin Hang Inventor before: Zhou Wuxian |
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Effective date of registration: 20160803 Address after: 317699, room 1, unit 30, Shijing District, Yucheng street, Taizhou, Zhejiang, Yuhuan County 202, China Applicant after: Lin Hang Address before: Xi Keng Zhen Nan Keng Yang Cun Wencheng County of Wenzhou City, Zhejiang province 325300 Applicant before: Zhou Wuxian |
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Inventor after: Niu Yuanli Inventor after: Wang Xin Inventor after: Lei Baoming Inventor after: Duan Shaohui Inventor after: Wang Zhenhua Inventor after: Chen Weihua Inventor after: Li Qiang Inventor after: Ma Zhiqiang Inventor after: Cang Haiyang Inventor after: Liu Wei Inventor after: Tan Youjun Inventor after: Yang Zeng Inventor before: Lin Hang |
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Effective date of registration: 20171128 Address after: 100032 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee after: ANYANG POWER SUPPLY COMPANY, STATE GRID HENAN ELECTRIC POWER CO., LTD. Patentee after: State Grid Corporation of China Address before: 317699, room 1, unit 30, Shijing District, Yucheng street, Taizhou, Zhejiang, Yuhuan County 202, China Patentee before: Lin Hang |
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