CN1967267B - PCB hollow coil current-sensing device - Google Patents
PCB hollow coil current-sensing device Download PDFInfo
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- CN1967267B CN1967267B CN2006100324824A CN200610032482A CN1967267B CN 1967267 B CN1967267 B CN 1967267B CN 2006100324824 A CN2006100324824 A CN 2006100324824A CN 200610032482 A CN200610032482 A CN 200610032482A CN 1967267 B CN1967267 B CN 1967267B
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- 238000004804 winding Methods 0.000 claims abstract description 75
- 230000005291 magnetic effect Effects 0.000 claims description 26
- 230000006698 induction Effects 0.000 claims description 22
- 239000004020 conductor Substances 0.000 claims description 14
- 230000008676 import Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000005355 Hall effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
The invention discloses a PCB hollow coil current sensor, with one or more layers PCB circuit boards, and each PCB board has even number, four or bigger, uniform plane spiral coil, every PCB board spiral coil distributing symmetrical, and each level adjacent spiral coil serial connects, the spiral coil between layer and layer connecting through cross-hole, and the first and last two ends as the output ends, to constitute the second coil; the first coil tightly winding each half of spiral coils without mutual adjacent to constitute one-cycle or multi-cycle loop. The invention can avoid the external electromagnetic interference, while the second coil can sensitively respond the current of the first coil, and produce the voltage signal proportional to the measured current change rate, and it has very good linearity and measurement precision, and strong electromagnetic interference resistance ability, suitable for electronic power meters and the current sensor for computer protection and measurement devices.
Description
Technical field
The present invention relates to a kind of current sensor, particularly a kind of PCB type hollow coil current-sensing device.
Background technology
Current sensor commonly used is measured electric current in electronic electric energy meter and the relay microcomputer protective device, and used current sensor has the main small-sized mutual device device of electromagnetic type electric current, small resistor current bypass sensor device and hall effect sensor.Electromagnetic current transducer is when measuring very big or very little electric current, because the influence of exciting current can produce bigger numerical error and phase angle error.In addition, the Ferrite Material that iron core uses can be saturated under big electric current, and iron core also can produce hysteresis after the magnetization, unless degaussing again, precision will descend.When the therefore small-sized mutual device device of electromagnetic type electric current was used as current measurement, its measuring accuracy was lower, and when especially electric current was excessive or too small, measuring error was big, and was subject to the influence of outside electromagnetic interference.
The available lower cost of small resistor current bypass technology obtains degree of precision, and the measurement of electric current is also very simple.When carrying out the high-precision current measurement, need to consider the stray inductance of bypass, this inductance value representative value is several nH, it will influence the amplitude of bypass impedance when frequency is higher.Even but it is still very big under the power frequency condition to the influence of phase place, power factor (PF) can produce obvious errors when low; And this technology produces heat and tested electric current and establishes because of bypass resistance and lacks electric current isolation sustain damage between the voltage, and especially in the Super-Current Measurement, self-heating is more serious.
Hall effect sensor has two kinds of main types, i.e. open loop type and closed-loop type, and the most Hall elements that use in the electric energy meter all adopt the design of open loop type to reduce system cost.Hall element has outstanding frequency response characteristic, can measure very large electric current.But the Hall element temperature influence is big, costs an arm and a leg, and is subject to outside electromagnetic interference.
Therefore; All there are a lot of deficiencies in above current sense technology; More prior is the interference that they all are subject to external magnetic field, and this magnetic field possibly be that the alternating magnetic field (uniform magnetic field) that produces of far-end or the electric current that is positioned near the lead the current sensor by flowing through produce.Current sensor is fashionable as charge electric energy meter metering, the particularly important is, can not tetchiness in the influence of external magnetic field.
Summary of the invention
For solving the existing problem that the existing precision of current sensor is low, antijamming capability is low, the present invention provides a kind of simple in structure, the linearity is high, antijamming capability is strong PCB type hollow coil current-sensing device.
The technical scheme that the present invention solves the problems of the technologies described above is: be provided with one or more layers PCB circuit board; Every layer of pcb board is provided with the identical planar spiral winding of even number more than 4; Spiral winding on all layers pcb board all tightly distributes around same center symmetrically, and corresponding spiral winding is coaxial between layer and the layer, and connects through via hole; Finally make the spiral winding on all layers pcb board all be serially connected; Two terminations, first end are as output terminal, and to constitute secondary coil, each planar spiral winding that constitutes secondary coil is the secondary spiral winding; The induction electromotive force equal and opposite in direction that produces in the adjacent secondary spiral winding of external interference magnetic field on every layer of pcb board, in the opposite direction, the serial connection and cancel out each other; Primary winding tightly constitutes a circle or multiturn loop around every layer of half secondary spiral winding not adjacent to each other, and imports tested electric current.
In the above-mentioned PCB type hollow coil current-sensing device, said secondary spiral winding pursues any in the rectangle, circle, 1/4 circle and the triangle that increase for size is even.
In the above-mentioned PCB type hollow coil current-sensing device, said primary winding directly is printed on PCB around the last half secondary spiral winding not adjacent to each other of every layer of PCB and goes up or be embedded on the PCB with electric conductor in addition.
In the above-mentioned PCB type hollow coil current-sensing device; Be provided with one or more layers PCB circuit board; Be respectively equipped with the identical Planar Quadratic spiral winding of even number more than 4 on pcb board part layer or all layers, the secondary spiral winding on all layers pcb board all tightly distributes around same center symmetrically and evenly, and corresponding secondary spiral winding is coaxial between layer and the layer; And connect through via hole; Finally make the secondary spiral winding on all layers pcb board all be serially connected, two terminations, first end are as output terminal, to constitute secondary coil; The induction electromotive force equal and opposite in direction that produces in the adjacent secondary spiral winding of external interference magnetic field on every layer of pcb board, in the opposite direction, the serial connection and cancel out each other; Around the nested making of each a secondary spiral winding spiral winding identical with its shape; Layer with layer between a corresponding spiral winding coaxial and be connected through via hole; Finally make a spiral winding on all layers pcb board formation primary winding that all is serially connected, two terminations, first end are as tested current input terminal.
In the above-mentioned PCB type hollow coil current-sensing device, a said spiral winding, secondary spiral winding are size evenly by in the rectangle, circle, 1/4 circle and the triangle that increase any.
In the above-mentioned PCB type hollow coil current-sensing device, a said spiral winding directly is printed on the PCB around each secondary spiral winding.
Technique effect of the present invention: 1) this hollow coil current-sensing device adopts air core coil, does not have ferromagnetic material, can not have the very high linearity because of tested electric current is big and saturated, and bandwidth; 2) this hollow coil current sensing adopts a plurality of equally distributed sensing coils to compose in series; The induction electromotive force equal and opposite in direction that external interference magnetic field is produced between adjacent windings, in the opposite direction; Final serial connection is cancelled out each other; Having played disturbing magnetic field does not to external world have the effect of response, does not need to add electro-magnetic screen layer in addition, and has guaranteed measuring accuracy; 3) this hollow coil current-sensing device can adopt PCB to make, and can significantly reduce cost, manufacture craft is meticulous, be convenient to produce in batches, and temperature influence is little, also be convenient to electronic electric energy meter and microcomputer protecting device in electronic circuit integrated.
Below in conjunction with accompanying drawing and specific embodiment the present invention is further described.
Description of drawings
Fig. 1 is the loop construction synoptic diagram of the embodiment of the invention 1 top layer.
Fig. 2 is the loop construction synoptic diagram of the embodiment of the invention 1 bottom.
Fig. 3 responds the schematic diagram of tested electric current for sensing coil of the present invention.
The disturbing magnetic field that Fig. 4 produces near big electric current the present invention does not relatively have the schematic diagram of response.
Fig. 5 is the loop construction synoptic diagram of the embodiment of the invention 2 top layers.
Fig. 6 is the structural representation of the embodiment of the invention 3
Embodiment
Referring to Fig. 1, Fig. 1 is the winding diagram on the PCB current sensor top layer, and 9,10,11,12 are PCB goes up the spiral winding that track constitutes, and they tightly evenly distribute around a center; 1,2,3,4 via holes that are on the PCB connect the levels spiral winding, and 13 is the output terminal (the secondary output terminal of PCB type hollow coil current-sensing device) of sensing coil.When the alternating magnetic field of far-end generation interference passed the sensing coil of this layer, the induction electromotive force equal and opposite in direction of 9 and 11 liang of spiral winding generations, in the opposite direction was cancelled out each other thereby be connected in series, and the induction electromotive force of 10 and 12 generations also can be cancelled out each other equally.
Fig. 2 has shown the winding diagram on the above-described PCB current sensor bottom, and same 5,6,7,8 are PCB goes up the spiral winding that track constitutes, tightly evenly distribute around a center, more than two centers be essentially same center.When the time-varying magnetic field of far-end generation interference vertically passed the sensing coil of this layer of Fig. 2, the induction electromotive force equal and opposite in direction of 5 and 6 liang of spiral winding generations, in the opposite direction was cancelled out each other thereby be connected in series, and the induction electromotive force of 7 and 8 generations also can be cancelled out each other equally.When the external interference magnetic field levels was passed above-mentioned sensing coil, sensing coil was non-inductive.
Among Fig. 4,15,16,17 are near the conductor the above-described PCB current sensor, and can pass through big electric current.When passing to alternating current in the conductor 15; Sensor produces the alternating magnetic field that disturbs relatively; And spiral winding 5 and the 6 induction electromotive force equal and opposite in directions because of this disturbing magnetic field generation, in the opposite direction, serial connection is cancelled out each other, and same 7 and 8 consequent induction electromotive forces also can be cancelled out each other.When passing to alternating current in the conductor 16, produce disturbing magnetic field, small coil 5 and 7 induction electromotive force equal and opposite in directions, in the opposite direction because of this disturbing magnetic field generation, serial connection is cancelled out each other, and same 6 and 8 consequent induction electromotive forces also can be cancelled out each other.When passing to alternating current in the conductor 17; Produce disturbing magnetic field; 5 and the 8 induction electromotive force directions that produce because of this disturbing magnetic field are identical, and the 6 and 7 induction electromotive force directions that produce because of this disturbing magnetic field are identical, and 5,8 and 6,7 because of the induction electromotive force of this disturbing magnetic field generation in the opposite direction; What electric current produced in the straight again lead 17 is a linear gradient magnetic field; 5, the 8 induction electromotive force sums and 6 because of this disturbing magnetic field generation, the 7 induction electromotive force sum equal and opposite in directions because of this disturbing magnetic field generation are in the opposite direction so, finally are connected in series and cancel out each other.Equally, 9,10,11,12 spiral windings also can be offset because of the induction electromotive force that near current interference produces fully.
Therefore, above-described PCB hollow coil current-sensing device to external world electromagnetic interference (EMI) do not have response.
Fig. 3 has shown the schematic diagram of electric current in the former conductor of above-described PCB current sensor measurement.14 is former conductor (through tested electric current), and 18 is the import and export of tested electric current.Its Central Plains conductor generally is made into annular as shown in the figure with the copper material of certain thickness and width, is embedded on the PCB.Former conductor also can be directly be produced on the PCB by the track of broad.PCB can arrange former conductor up and down, and the annular of former conductor has variously, and 14 are merely wherein preferably a kind of; PCB also can be made into multilayer board, increases the total number of turns of sensing coil.When passing through tested alternating current in the former conductor; The induction electromotive force direction that all spiral windings of this layer of PCB (upper strata) (9,10,11,12) produce is identical; The induction electromotive force direction that the spiral winding (5,6,7,8) of same PCB bottom produces is also identical; And more than all spiral windings produce in two-layer induction electromotive force direction all identical, the serial connection mutual superposition is through one of sensing coil output terminal 13 output and tested electric current corresponding voltage signal.
31 is the former conductor of PCB hollow coil current-sensing device among Fig. 5, and 32 is its secondary coil, and the vertical view of whole sensing coil is circular basically.
Among Fig. 6,41,42 are respectively the primary winding and the secondary coil of PCB current sensor.Primary winding 41 is printed on the ground floor of PCB, and secondary coil 42 is printed on the second layer of PCB.The 3rd layer of PCB go up the spiral winding printed among similar Fig. 2, and be connected with primary winding on the PCB ground floor through via hole 34,36,37,39 as primary winding.The 4th layer of PCB go up the spiral winding printed among similar Fig. 2, and be connected with secondary coil on the PCB second layer through via hole 33,35,38,40 as secondary coil.Spiral winding and secondary spiral winding also can be printed on the identical layer of PCB.According to this method, primary winding and secondary coil can not receive the influence of outside electromagnetic interference, can also increase more layer, or serial connection polylith PCB, increase its coefficient of mutual inductance.
Claims (6)
1. PCB type hollow coil current-sensing device; It is characterized in that: be provided with one or more layers PCB circuit board, every layer of pcb board is provided with the identical planar spiral winding of even number more than 4, and the spiral winding on all layers pcb board all tightly distributes around same center symmetrically; And corresponding spiral winding is coaxial between layer and the layer; And connect through via hole, make that finally the spiral winding on all layers pcb board all is serially connected, two terminations, first end are as output terminal; To constitute secondary coil, each planar spiral winding that constitutes secondary coil is the secondary spiral winding; The induction electromotive force equal and opposite in direction that produces in the adjacent secondary spiral winding of external interference magnetic field on every layer of pcb board, in the opposite direction, the serial connection and cancel out each other; Primary winding tightly constitutes a circle or multiturn loop around every layer of half secondary spiral winding not adjacent to each other, and imports tested electric current.
2. PCB type hollow coil current-sensing device according to claim 1 is characterized in that: said secondary spiral winding pursues any in the rectangle, circle, 1/4 circle and the triangle that increase for size is even.
3. PCB type hollow coil current-sensing device according to claim 1 is characterized in that: said primary winding directly is printed on PCB around the last half secondary spiral winding not adjacent to each other of every layer of PCB and goes up or be embedded on the PCB with electric conductor in addition.
4. PCB type hollow coil current-sensing device; It is characterized in that: be provided with one or more layers PCB circuit board; Be respectively equipped with the identical Planar Quadratic spiral winding of even number more than 4 on pcb board part layer or all layers, the secondary spiral winding on all layers pcb board all tightly distributes around same center symmetrically and evenly, and corresponding secondary spiral winding is coaxial between layer and the layer; And connect through via hole; Finally make the secondary spiral winding on all layers pcb board all be serially connected, two terminations, first end are as output terminal, to constitute secondary coil; The induction electromotive force equal and opposite in direction that produces in the adjacent secondary spiral winding of external interference magnetic field on every layer of pcb board, in the opposite direction, the serial connection and cancel out each other; Around the nested making of each a secondary spiral winding spiral winding identical with its shape; Layer with layer between a corresponding spiral winding coaxial and be connected through via hole; Finally make a spiral winding on all layers pcb board formation primary winding that all is serially connected, two terminations, first end are as tested current input terminal.
5. PCB type hollow coil current-sensing device according to claim 4 is characterized in that: a said spiral winding, secondary spiral winding are size evenly by in the rectangle, circle, 1/4 circle and the triangle that increase any.
6. PCB type hollow coil current-sensing device according to claim 4 is characterized in that: a said spiral winding directly is printed on the PCB around each secondary spiral winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100324824A CN1967267B (en) | 2006-10-29 | 2006-10-29 | PCB hollow coil current-sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100324824A CN1967267B (en) | 2006-10-29 | 2006-10-29 | PCB hollow coil current-sensing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1967267A CN1967267A (en) | 2007-05-23 |
| CN1967267B true CN1967267B (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006100324824A Expired - Fee Related CN1967267B (en) | 2006-10-29 | 2006-10-29 | PCB hollow coil current-sensing device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197274B (en) * | 2013-03-13 | 2014-07-16 | 江苏省电力公司电力科学研究院 | Calibration system and calibration method of alternating large current of current transformer |
| FR3044096B1 (en) * | 2015-11-23 | 2017-12-01 | Schneider Electric Ind Sas | CURRENT SENSOR AND DEVICE FOR MEASURING AN ELECTRICAL CURRENT |
| FR3077390A1 (en) * | 2018-01-31 | 2019-08-02 | Nl Conseil | INSTANTANEOUS VARIATION SPEED SENSOR OF GALVANICALLY ISOLATED CURRENT AND INTEGRATED ON A CIRCUIT BOARD |
| CN110836987B (en) * | 2019-11-25 | 2021-12-24 | 新沂市鑫洋电子有限公司 | Manganese-copper shunt of three-phase intelligent electric energy meter and application thereof |
| CN111650434B (en) * | 2019-12-26 | 2022-05-24 | 北京博纳电气股份有限公司 | Method for single-phase intelligent electric energy meter to measure by adopting PCB type current sensor |
| CN117330813B (en) * | 2023-09-27 | 2024-05-14 | 上海磊跃自动化设备有限公司 | Hollow current measurement method, hybrid current transformer and circuit breaker |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1823396A (en) * | 2003-07-11 | 2006-08-23 | 皇家飞利浦电子股份有限公司 | Inductive-system |
| CN200983314Y (en) * | 2006-10-29 | 2007-11-28 | 长沙同庆电气信息有限公司 | PCB hollow coil current sensor |
-
2006
- 2006-10-29 CN CN2006100324824A patent/CN1967267B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1823396A (en) * | 2003-07-11 | 2006-08-23 | 皇家飞利浦电子股份有限公司 | Inductive-system |
| CN200983314Y (en) * | 2006-10-29 | 2007-11-28 | 长沙同庆电气信息有限公司 | PCB hollow coil current sensor |
Non-Patent Citations (4)
| Title |
|---|
| JP平3-223678A 1991.10.02 |
| 胡娟等.不同电压等级下的Rogowski线圈电子式电流互感器的研究.《变压器》.2002,第39卷(第10期),第11-13页. * |
| 赵美君.电子式互感器应用技术的研究与设计.《中国优秀硕士学位论文全文数据库》.2005,全文. * |
| 陈庆.电子式空芯电流互感器若干关键问题的研究.《中国优秀硕士学位论文全文数据库》.2004,全文. * |
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| CN1967267A (en) | 2007-05-23 |
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Owner name: CHANGSHA YINHUA ELECTRIC EQUIPMENT CO., LTD. Free format text: FORMER OWNER: CHANGSHA TONGQING ELECTRICITY INFORMATION CO., LTD. Effective date: 20140116 |
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Effective date of registration: 20140116 Address after: 410013 School of electrical and information engineering, Hunan University, Changsha, Hunan, Patentee after: Changsha Yinhua Electric Equipment Co., Ltd. Address before: 410013 Hunan province Changsha City Lugu high tech Zone Software Park 407 Patentee before: Changsha Tongqing Electric Co., Ltd. |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhou Youqing Inventor after: Li Feng Inventor after: Wu Guiqing Inventor after: Peng Hongmei Inventor before: Zhou Youqing Inventor before: Gong Wei Inventor before: Wu Guiqing Inventor before: Peng Honghai |
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Effective date of registration: 20161202 Address after: 414413 Hunan Miluo circular economy industrial park, south of dragon boat Road, No. 1 Patentee after: MILUO TONGBIAN ELECTRIC CO., LTD. Address before: 410013 School of electrical and information engineering, Hunan University, Changsha, Hunan, Patentee before: Changsha Yinhua Electric Equipment Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20191029 |