CN202258626U - Novel combined PCB Rogowski coil - Google Patents
Novel combined PCB Rogowski coil Download PDFInfo
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- CN202258626U CN202258626U CN201120374402XU CN201120374402U CN202258626U CN 202258626 U CN202258626 U CN 202258626U CN 201120374402X U CN201120374402X U CN 201120374402XU CN 201120374402 U CN201120374402 U CN 201120374402U CN 202258626 U CN202258626 U CN 202258626U
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Abstract
The utility model provides a panel type PCB Rogowski coil. A circuit PCB is adopted as a frame. The center of the PCB frame is provided with a through hole. Lower via holes are provided at the edge of the through hole on a radially outward circumference. Upper via holes are provided at the edge of the PCB frame on a radially inward circumference. A printed line successively passes through the upper via holes and the lower via holes in a same winding direction and is wound on the PCB frame. An outer rim side of the PCB frame is provided with N mounting holes, a line inlet hole and a line outlet hole, wherein N is larger than or equal with 1. The N mounting holes, the line inlet hole and the line outlet hole are uniformly arranged on the circumference at an outer rim side of the PCB frame along a concentric circle of the frame. The diameters of the mounting holes, the line inlet hole and the line outlet hole are same. The novel combined PCB Rogowski coil comprises at least two same panel type PCB Rogowski coils which are correspondingly connected in series. The winding directions of the printed lines of two adjacent panel type PCB Rogowski coil are opposite, and are rotated for 360/N degrees. The corresponding mounting holes, the line inlet hole and the line outlet hole are fixed by a conductive connecting device.
Description
Technical field:
The utility model relates to electronic mutual inductor, relates in particular to a kind of novel combined PCB Luo-coil.
Background technology:
At present, electronic mutual inductor is a kind of novel power equipment, because sensing mode is different from traditional instrument transformer, the unrivaled advantage of traditional instrument transformer is arranged, and makes it that wide application prospect arranged in the electric power system in future.Electronic mutual inductor is divided into active, passive two types; Active formula electric mutual inductor has adopted advanced photoelectron technology and modern integrated electronic technology; Having brought into play characteristics such as highly reliable, high accuracy, high stable, is one of research direction of the practical prospect of at present tool.The active electronic circuit is adopted in the high-pressure side of active electronic current transformer, utilizes optical fiber as transmission channel.Its principle is: the electric current that at first records primary side with current sensing head; With the large scale integrated circuit analog to digital converter detected signal is carried out the digitlization conversion and utilizes light-emitting component to carry out opto-electronic conversion; Utilize optical fiber to transfer signals to electronegative potential; And carry out opto-electronic conversion and digitized processing again, the amount of recording after directly will reducing is at last delivered to instruments such as measurement mechanism or relaying protection.Wherein, the most representative air core coil electronic current mutual inductor of (the Rogowski coil is claimed Luo-coil again) that just is based on,, advantage such as precision high, good stability simple in structure and become the focus of present research with it.
Luo-coil is a kind of air core coil of special construction; Be widely used as the induction coil of current transformer current detecting instrument sensing head, have the linearity good, measure advantages such as wide dynamic range, no magnetic core saturated phenomenon, output Signal Spacing, simple in structure and insertion loss be little.
Traditional Luo-coil needs manual coiling, or the coil winding machine coiling.No matter manual coiling, or coil winding machine coiling, the secondary coiling of Luo-coil can not be absolute evenly, and mutually far short of what is expected with anti-interference coefficient with product coefficient of mutual inductance in batches, the distributed constant of coil is difficult to be consistent, and broken string easily.Luo-coil based on PCB (printed circuit board (PCB)) has appearred again at present; With PCB as skeleton; Printed conductor replaces the coiling of traditional Luo-coil, and its principle is the same basically with traditional Luo-coil, is divided into two kinds according to the structure difference: plate PCB Luo-coil and combined PCB Luo-coil.
Plate PCB Luo-coil; Its schematic diagram is as shown in Figure 1; As skeleton, the PCB center has through hole with PCB, and the conductor that this through hole is used for primary side passes; Adopt track as sensor coil, track passes through coiling direction in via hole edge of PCB skeleton outer rim, inner edge up and down successively on the PCB skeleton.
The induced electromotive force e (t) that can be derived this plate PCB Luo-coil by the law of electromagnetic induction and Ampere circuit law is:
In the formula: i---the electric current that flows through in the Primary Conductor, unit are A (ampere); Di is the differential of i;
N---coil turn;
H---wiring board thickness;
---skeleton external diameter, unit are m;
T---the time, the s of unit (second); Dt is the differential of t;
In the time of can being known the current constant in the primary side conductor that passes in the said PCB skeleton through hole by following formula, induced electromotive force e (t) is by coil turn n, wiring board thickness h, skeleton external diameter R2 and skeleton internal diameter R1 decision; But because the influence of circuit board size and thickness, coil turn n, wiring board thickness h, skeleton external diameter R2 and skeleton internal diameter R1 can receive certain restriction, and induced electromotive force e (t) can not reach satisfied requirement; Often in the application of reality, because the restriction of processing technology, the pcb board of processing usually can not be very thick; Generally have only several millimeters; The cloth number of wire turns can not be a lot, so the undertension that single coil produced, needs the use that is together in series of several pcb boards to satisfy the requirement of output; In order to obtain higher accuracy; Eliminate the interference of external electromagnetic field, combined PCB Luo-coil will be passed by the through hole of the plate PCB Luo-coil of even numbered blocks through the center and once survey conductor and be together in series, and; The direction of winding of adjacent two plate Luo-coils is opposite; See Fig. 2,, can judge and flow through in the said combined PCB Luo-coil: the induced voltage addition that the inner electric current of each plate PCB Luo-coil produces through the right-hand rule; The induced voltage that each plate PCB Luo-coil external electromagnetic field produces on each plate Luo-coil is cancelled out each other; And identical a plurality of plate PCB Luo-coil is cascaded, and can increase the coefficient of mutual inductance of whole winding.
The coefficient of mutual inductance of single plate PCB Luo-coil can be obtained by total current theorem and electromagnetic induction theorem.If the coefficient of mutual inductance of single plate PCB Luo-coil is m, the quantity of the plate Luo-coil in the combined PCB Luo-coil is N, and the coefficient of mutual inductance M of then whole combined PCB Luo-coil is:
(formula 2)
Can find out that the coefficient of mutual inductance of combined PCB Luo-coil has had large increase, and be to have the plate PCB Luo-coil of identical even number to constitute in the combined PCB Luo-coil, simple in structure, be easy to assembling, be convenient to produce in batches.But its shortcoming is that veneer PCB Luo-coil coefficient of mutual inductance is less; In electronic current mutual inductor is used; Often need be according to the primary current rated value, change PCB Luo-coil coefficient of mutual inductance, and the plate PCB Luo-coil in the present this combined PCB Luo-coil is need increase or reduce the time; Because track is more very thin, the connection between the adjacent flat template PCB Luo-coil is cumbersome.
The utility model content:
The utility model provides a kind of plate PCB Luo-coil, is used for a plurality of combined PCB Luo-coils that are assembled into, to improve whole coefficient of mutual inductance; The utility model also provides a kind of novel combined PCB Luo-coil, common relatively single plate PCB Luo-coil, and the coefficient of mutual inductance integral multiple improves.
A kind of plate PCB Luo-coil; Adopt circular PCB as skeleton, the center of PCB skeleton offers through hole, and the edge side of through hole is provided with via hole under the week; The outer edge side of PCB skeleton is provided with a week goes up via hole; Track is wound on the PCB skeleton, wherein through upper and lower via hole successively: the last via hole arranged outside of said PCB skeleton has N installing hole and an entrance hole, a wire hole, N >=1; N installing hole and an entrance hole, a wire hole are evenly distributed on a PCB skeleton outer edge side upper edge concentrically ringed week of PCB skeleton, and installing hole, entrance hole, wire hole diameter are identical.
A kind of novel combined PCB Luo-coil, wherein: comprise at least two identical plate PCB Luo-coils; Plate PCB Luo-coil adopts circular PCB as skeleton; The center of PCB skeleton offers through hole; The edge side of through hole is provided with via hole under the week, and the outer edge side of PCB skeleton is provided with a week goes up via hole, and track is wound on the PCB skeleton through upper and lower via hole successively; The last via hole arranged outside of PCB skeleton has N installing hole and an entrance hole, a wire hole; N >=1; N installing hole and an entrance hole, a wire hole are evenly distributed on a PCB skeleton outer edge side upper edge concentrically ringed week of PCB skeleton, and installing hole, entrance hole, wire hole diameter are identical; The through-hole alignment of each plate PCB Luo-coil connects, and two adjacent flat template PCB Luo-coils interlace and rotate the 360/N degree, and the entrance hole of back one plate PCB Luo-coil is fixedly connected through conductive connecting device with the wire hole of last plate PCB Luo-coil.
Described novel combined PCB Luo-coil, wherein: comprise at least three identical plate PCB Luo-coils; The angle of rotating between each adjacent flat template PCB Luo-coil is to interlace successively along same direction.
Described novel combined PCB Luo-coil, wherein: described installing hole, entrance hole, wire hole diameter are identical.
Described novel combined PCB Luo-coil, wherein: described conductive connecting device adopts supporting metal screw and nut.
The utility model will reach following technique effect after adopting technique scheme:
The plate PCB Luo-coil that the utility model proposes is provided with all installing holes, entrance hole, wire hole at the outer edge side of PCB skeleton, is convenient to a plurality of identical plate PCB Luo-coils serial connections and is assembled into combined PCB Luo-coil; The utility model also provides a kind of novel combined PCB Luo-coil; Assemble by a plurality of identical plate PCB Luo-coil serial connections; Adjacent plate PCB Luo-coil interlaces and rotates the 360/N degree; The angle of rotating between each adjacent flat template PCB Luo-coil is to interlace successively along same direction, and the entrance hole of back one plate PCB Luo-coil is fixedly connected through conductive connecting device with the wire hole of last plate PCB Luo-coil, and so the back just has been connected in series with the track that wire hole was connected of last plate PCB Luo-coil once the entrance hole of plate PCB Luo-coil; Simultaneously; Can each the plate PCB Luo-coil relative fixed in the combined PCB Luo-coil be got up, prevent to relatively rotate, thereby avoid causing the unsettled situation of coefficient of mutual inductance.
Description of drawings:
Fig. 1 is the schematic diagram of PCB Luo-coil in the prior art;
Fig. 2 by PCB Luo-coil shown in Figure 1 be in series the sketch map of the combined Luo-coil of formation;
Fig. 3 is the structural representation of the plate PCB Luo-coil that the utility model provided;
Fig. 4 is the scheme of installation of two plate PCB Luo-coils in the novel combined PCB Luo-coil that the utility model provided.
Embodiment:
A kind of plate PCB Luo-coil of the utility model like Fig. 3, adopts circular PCB as skeleton 1; The center of PCB skeleton 1 offers through hole 2, and the edge side of through hole 2 is provided with via hole under the week, and the outer edge side of PCB skeleton 1 is provided with a week goes up via hole; Track 6 is wound on the PCB skeleton 1 through upper and lower via hole successively; Wherein, the last via hole arranged outside of said PCB skeleton 1 has N installing hole 5 and entrance hole 3, a wire hole 4, N >=1; N installing hole 5 and entrance hole 3, a wire hole 4 are evenly distributed on PCB skeleton 1 a concentrically ringed week of 1 outer edge side upper edge PCB skeleton, and installing hole 5, entrance hole 3, wire hole 4 diameters are identical.In the present embodiment, N gets 22, promptly evenly is provided with 24 holes a week on PCB skeleton 1 outer edge side.If N gets 34, evenly be provided with 36 holes a week on PCB skeleton 1 outer edge side so.
The utility model also provides a kind of novel combined PCB Luo-coil, wherein: comprise at least two identical plate PCB Luo-coils; Described plate PCB Luo-coil is as shown in Figure 3, adopts circular PCB as skeleton 1, and the center of PCB skeleton 1 offers concentric through hole 2; A radially outside week of the edge of through hole 2 is provided with down via hole; A radially inside week of the outer rim of PCB skeleton 1 is provided with via hole, and track 6 is wound on the PCB skeleton 1 through upper and lower via hole by same coiling direction successively, and the outer edge side of PCB skeleton 1 is provided with N installing hole 5 and entrance hole 3, a wire hole 4; N >=1; N installing hole 5 and entrance hole 3, a wire hole 4 are evenly distributed on PCB skeleton 1 a concentrically ringed week of 1 outer edge side upper edge skeleton, and in the present embodiment, N gets 22; Have 24 holes, described installing hole 5, entrance hole 3, wire hole 4 diameters are all identical; Each plate PCB Luo-coil passes primary side conductor serial connection successively through each corresponding through hole 2; Two adjacent flat template PCB Luo-coils interlace and rotate the 360/N degree; The angle of rotating between each adjacent flat template PCB Luo-coil is to interlace successively along same direction; The corresponding installing hole 5 that connects, entrance hole 3, wire hole 4 are fixedly connected through conductive connecting device, and in the present embodiment, described conductive connecting device adopts supporting metal screw and nut.
Comprise at least two identical plate PCB Luo-coils; Plate PCB Luo-coil adopts circular PCB as skeleton 1; The center of PCB skeleton 1 offers through hole 2; The edge side of through hole 2 is provided with via hole under the week, and the outer edge side of PCB skeleton 1 is provided with a week goes up via hole, and track 6 is wound on the PCB skeleton 1 through upper and lower via hole successively; The last via hole arranged outside of PCB skeleton 1 has N installing hole 5 and entrance hole 3, a wire hole 4; N >=1; N installing hole 5 and entrance hole 3, a wire hole 4 are evenly distributed on PCB skeleton 1 a concentrically ringed week of 1 outer edge side upper edge PCB skeleton, and in the present embodiment, N gets 22; Have 24 holes, described installing hole 5, entrance hole 3, wire hole 4 diameters are all identical; The through hole 2 of each plate PCB Luo-coil is aimed at and is connected; Two adjacent flat template PCB Luo-coils interlace and rotate the 360/N degree; The wire hole 4 of entrance hole 3 and the last plate PCB Luo-coil of back one plate PCB Luo-coil is fixedly connected through conductive connecting device; In the present embodiment, described conductive connecting device adopts supporting metal screw and nut.
See shown in Figure 4; The one PCB Luo-coil and the 2nd PCB Luo-coil are placed through 2 alignment of middle through hole; With a PCB Luo-coil as object of reference; The position is motionless; The relative PCB Luo-coil clockwise direction of the 2nd PCB Luo-coil rotation (360/n) degree is aimed at the wire hole 4 (2OUT) of entrance hole 3 (1IN) and a PCB Luo-coil of the 2nd PCB Luo-coil and is connected and fix through metal screw and nut, and each corresponding hole all uses screw to pass also nut to fix with other; Thereby be electrically connected between the wire hole 4 (2OUT) of the entrance hole 3 (1IN) of the 2nd PCB Luo-coil and a PCB Luo-coil, thereby reach the purpose of series connection.
If described novel combined PCB Luo-coil comprises at least three identical plate PCB Luo-coils, counterrotating angle all interlaces along same direction successively between the adjacent flat template PCB Luo-coil so in twos.
The novel combined PCB Luo-coil that the utility model designed is realized the series connection of polylith same plane type PCB Luo-coil, to increase the coefficient of mutual inductance of combined PCB Luo-coil.Adopt the plate PCB Luo-coil of printed circuit board (pcb) design printed conductor to be evenly arranged on the printed circuit board (pcb) through computer aided design software, its digital process technology can guarantee that the cross-sectional area of every circle coil equates.Bottom and top layer (being the two sides of printed circuit board) at printed circuit board are evenly placed lead, and connect conducting by upper and lower via hole between two-layer.In order to eliminate the influence of external magnetic field to instrument transformer, two leads around connecting to opposite coil, are realized the loop line function in the common air core coil, can increase coil output voltage simultaneously.And the utility model is simple in structure, is convenient to produce high conformity in batches.
Claims (4)
1. plate PCB Luo-coil; Adopt circular PCB as skeleton, the center of PCB skeleton offers through hole, and the edge side of through hole is provided with via hole under the week; The outer edge side of PCB skeleton is provided with a week goes up via hole; Track is wound on the PCB skeleton through upper and lower via hole successively, it is characterized in that: the last via hole arranged outside of said PCB skeleton has N installing hole and an entrance hole, a wire hole, N >=1; N installing hole and an entrance hole, a wire hole are evenly distributed on a PCB skeleton outer edge side upper edge concentrically ringed week of PCB skeleton, and installing hole, entrance hole, wire hole diameter are identical.
2. a novel combined PCB Luo-coil is characterized in that: comprise two identical plate PCB Luo-coils at least; Plate PCB Luo-coil adopts circular PCB as skeleton; The center of PCB skeleton offers through hole; The edge side of through hole is provided with via hole under the week, and the outer edge side of PCB skeleton is provided with a week goes up via hole, and track is wound on the PCB skeleton through upper and lower via hole successively; The last via hole arranged outside of PCB skeleton has N installing hole and an entrance hole, a wire hole; N >=1; N installing hole and an entrance hole, a wire hole are evenly distributed on a PCB skeleton outer edge side upper edge concentrically ringed week of PCB skeleton, and installing hole, entrance hole, wire hole diameter are identical; The through-hole alignment of each plate PCB Luo-coil connects, and two adjacent flat template PCB Luo-coils interlace and rotate the 360/N degree, and the entrance hole of back one plate PCB Luo-coil is fixedly connected through conductive connecting device with the wire hole of last plate PCB Luo-coil.
3. novel combined PCB Luo-coil as claimed in claim 2 is characterized in that: comprise at least three identical plate PCB Luo-coils; The angle of rotating between each adjacent flat template PCB Luo-coil is to interlace successively along same direction.
4. like claim 2 or 3 described novel combined PCB Luo-coils, it is characterized in that: described conductive connecting device adopts supporting metal screw and nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120374402XU CN202258626U (en) | 2011-09-30 | 2011-09-30 | Novel combined PCB Rogowski coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120374402XU CN202258626U (en) | 2011-09-30 | 2011-09-30 | Novel combined PCB Rogowski coil |
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| Publication Number | Publication Date |
|---|---|
| CN202258626U true CN202258626U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120374402XU Expired - Lifetime CN202258626U (en) | 2011-09-30 | 2011-09-30 | Novel combined PCB Rogowski coil |
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| CN (1) | CN202258626U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630723A (en) * | 2013-11-25 | 2014-03-12 | 北京航空航天大学 | Rogowski coil sensing head suitable for Rogowski coil current sensor |
| CN103809004A (en) * | 2014-01-27 | 2014-05-21 | 董右云 | High-precision flexible voltage transformer and manufacturing method thereof |
| CN103884899A (en) * | 2014-03-12 | 2014-06-25 | 西安交通大学 | Rogowski coil for large-current rapid pulse measurement |
| CN103887051A (en) * | 2014-01-27 | 2014-06-25 | 董右云 | High-precision flexible current transformer with uniform performance and production method of high-precision flexible current transformer |
| CN104155499A (en) * | 2014-08-20 | 2014-11-19 | 国家电网公司 | Current measuring device based on combined PCB type Rogowski coils and method thereof |
| CN104237591A (en) * | 2013-06-18 | 2014-12-24 | 北京映翰通网络技术股份有限公司 | Designing method and achievement for single PCB closed rogowski coil resisting magnetic field interference |
| WO2014201937A1 (en) * | 2013-06-18 | 2014-12-24 | 北京映翰通网络技术股份有限公司 | Pcb rogowski coil |
| CN109100558A (en) * | 2018-06-06 | 2018-12-28 | 中国电力科学研究院有限公司 | A kind of Rogowski coil and current measuring device |
-
2011
- 2011-09-30 CN CN201120374402XU patent/CN202258626U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237591A (en) * | 2013-06-18 | 2014-12-24 | 北京映翰通网络技术股份有限公司 | Designing method and achievement for single PCB closed rogowski coil resisting magnetic field interference |
| WO2014201937A1 (en) * | 2013-06-18 | 2014-12-24 | 北京映翰通网络技术股份有限公司 | Pcb rogowski coil |
| CN104237591B (en) * | 2013-06-18 | 2017-05-17 | 北京映翰通网络技术股份有限公司 | Designing method and achievement for single PCB closed rogowski coil resisting magnetic field interference |
| CN103630723A (en) * | 2013-11-25 | 2014-03-12 | 北京航空航天大学 | Rogowski coil sensing head suitable for Rogowski coil current sensor |
| CN103809004A (en) * | 2014-01-27 | 2014-05-21 | 董右云 | High-precision flexible voltage transformer and manufacturing method thereof |
| CN103887051A (en) * | 2014-01-27 | 2014-06-25 | 董右云 | High-precision flexible current transformer with uniform performance and production method of high-precision flexible current transformer |
| CN103809004B (en) * | 2014-01-27 | 2016-04-06 | 董右云 | A kind of high-accuracy soft voltage transformer (VT) and preparation method thereof |
| CN103887051B (en) * | 2014-01-27 | 2016-05-18 | 董右云 | High-accuracy soft current transformer that a kind of performance is consistent and preparation method thereof |
| CN103884899A (en) * | 2014-03-12 | 2014-06-25 | 西安交通大学 | Rogowski coil for large-current rapid pulse measurement |
| CN103884899B (en) * | 2014-03-12 | 2016-03-30 | 西安交通大学 | A kind of Luo-coil measured for big current fast pulse |
| CN104155499A (en) * | 2014-08-20 | 2014-11-19 | 国家电网公司 | Current measuring device based on combined PCB type Rogowski coils and method thereof |
| CN109100558A (en) * | 2018-06-06 | 2018-12-28 | 中国电力科学研究院有限公司 | A kind of Rogowski coil and current measuring device |
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Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121121 Owner name: ELECTRIC POWER RESEARCH INSTITUTE OF Free format text: FORMER OWNER: HENAN INSTITUTE OF POWER EXPERIMENT Effective date: 20121121 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20121121 Address after: 450052 Songshan South Road, Henan, No. 85, No. Patentee after: HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee after: State Grid Corporation of China Address before: 450052 Songshan, Zhengzhou, Henan District No. 27 South Road, No. 85 Patentee before: HENAN ELECTRIC POWER Research Institute |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 450052 Songshan, Zhengzhou, Henan District No. 27 South Road, No. 85 Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee after: State Grid Corporation of China Address before: 450052 Songshan South Road, Henan, No. 85, No. Patentee before: Henan Electric Power Corporation Electric Power Science Research Institute Patentee before: State Grid Corporation of China |
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| TR01 | Transfer of patent right |
Effective date of registration: 20161205 Address after: 450052 Songshan, Zhengzhou, Henan District No. 27 South Road, No. 85 Patentee after: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee after: HENAN ENPAI HIGH-TECH GROUP Co.,Ltd. Patentee after: State Grid Corporation of China Address before: 450052 Songshan, Zhengzhou, Henan District No. 27 South Road, No. 85 Patentee before: STATE GRID HENAN ELECTRIC POWER CORPORATION ELECTRIC POWER SCIENCE Research Institute Patentee before: State Grid Corporation of China |
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| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
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| CX01 | Expiry of patent term |