CN104284515B - Designing method for magnetic-field-interference resistant multi-PCB closed Rogowski coil and implementation - Google Patents
Designing method for magnetic-field-interference resistant multi-PCB closed Rogowski coil and implementation Download PDFInfo
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- CN104284515B CN104284515B CN201310289012.6A CN201310289012A CN104284515B CN 104284515 B CN104284515 B CN 104284515B CN 201310289012 A CN201310289012 A CN 201310289012A CN 104284515 B CN104284515 B CN 104284515B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/003—Printed circuit coils
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
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Abstract
The invention provides a designing method for a magnetic-field-interference resistant multi-PCB closed Rogowski coil and implementation. The multi-PCB closed Rogowski coil is formed by connecting two coils on multiple PCBs in series, wherein the two coils are reverse in winding direction. The coil comprises multiple constitution units connected in series, wherein the constitution units are the same. The centers of all the constitution units are evenly distributed on a magnetic force line of a magnetic field generated by current to be detected, and each constitution unit comprises two respective wire turns of the two coils which are connected in series and are reverse in winding direction, wherein the two wire turns are tightly adjacent, and each wire turn comprises an inlet wire, an outlet wire and a winding wire. The two outlet wires of the final constitution unit of the final PCB are directly connected. The winding wires are formed by wirings and passing holes in a winding mode, wherein the wirings are located on different layers, and the passing holes are formed among different layers. The plane of the winding wires is perpendicular to the surfaces of the PCBs, and the wiring paths of the winding wires coincide in the direction perpendicular to the surfaces of the PCBs. The normal direction of the magnetic force line passing through the centers of the sections of the winding wires is the same as the direction of the sections of the winding wires, and the tangential direction is approximately perpendicular to the sections of the winding wires.
Description
Technical field
Present invention relates generally to PCB (printed circuit board (PCB)) Luo-coil in current sensor, and in particular to a kind of diamagnetic
Field interference polylith PCB closure Luo-coil methods for designing and realization.
Background technology
Roche (Rogowski) coil is to form wire uniformly around on the framework of the nonmagnetic substance of sectional uniform
Coil.Luo-coil has lightweight, bandwidth, the linearity good and the features such as without magnetic saturation phenomenon because of it, commonly used
In current measuring device.Whether can open when Luo-coil is measured according to it, be segmented into closing Luo-coil and opening
Luo-coil.Fig. 1 is shown to close Luo-coil.
Closure Luo-coil 100 includes following part：
(1) signal output part 125 and signal output part 130；
(2) from signal output part 130 around Circular Winding terminal 120 Circular Winding 110；
(3) from Circular Winding terminal 120 along Circular Winding center to signal output part 125 loop line circle 115.
During using the closure measurement electric current of Luo-coil 100, need first by current－carrying conductor 105 through closure Luo-coil 100.
In order to ensure certainty of measurement, the center for allowing current－carrying conductor 105 to pass perpendicularly through closure Luo-coil 100 is needed, current－carrying conductor 105
Center and the center superposition of closure Luo-coil 100.Closure Luo-coil 100 is looped around around current－carrying conductor 105, when treating test cross
When stream electric current I (t) flows through current－carrying conductor 105, alternating current I (t) to be measured can produce AC magnetic field around current－carrying conductor 105,
The magnetic line of force is approximately the circle with the center of current－carrying conductor 105 as the center of circle, in each astragal circle of 100 Circular Winding of closure Luo-coil 110
The heart is located on the one therein circular magnetic line of force.The corresponding sectional area of each astragal circle of the Circular Winding 110 of closure Luo-coil 100
Equal, (i.e. the kernel of section is arrived for each astragal circle cross-wise direction of Circular Winding 110 and the magnetic line of force normal direction for crossing the kernel of section
The center radius direction of current－carrying conductor 105) it is consistent, section is vertical with the tangential direction of the circular magnetic line of force.So can ensure that and close
Close the magnetic flux φ of each wire turn of Luo-coil Circular Windingi(t) approximately equal, and the magnetic flux and electric current be directly proportional.
ΦiT ()=LI (t) is 1)
Alternating current I (t) to be measured produces the change of magnetic flux in the volume that the closure Circular Winding of Luo-coil 100 is surrounded
Change, Luo-coil 100 can be closed and be converted into the voltage signal proportional to each wire turn total magnetic flux differential, exactly close sieve
Output voltage signal V (t) between the output end 125 and output end 130 of family name's coil 100.
Can obtain after simplification, closure Luo-coil output voltage signal V (t) approximately with the differential of alternating current I (t)
It is proportional.
It is integrated to closing Luo-coil output voltage signal V (t), it is possible to obtain proportional with alternating current I (t)
Signal, here it is closure Luo-coil measure alternating current principle.
I (t)=K ∫ V (t) dt 4)
Closure Luo-coil measurement current precision is higher, and measurement signal band is roomy, can realize electricity with relatively low cost
Gas isolation measurement, tolerance current capacity is virtually limitless big, it is adaptable to the accurate measurement with fixed position current－carrying conductor electric current, can
To be applied to the fields such as relay protection.
, when current measurement is carried out, Circular Winding 110 is except pickup to alternating current I (t) to be measured for closure Luo-coil 100
Outside the changes of magnetic field of generation, also can pick up to other alternation interference magnetic fields in space.Such as when occur in Fig. 1 paper
During the alternation interference magnetic field in face direction, will produce between the starting point 130 and terminal 120 of Circular Winding 110 due to alternation interference
The voltage signal that magnetic field produces.
In order to resist external magnetic field to close Luo-coil 100 measurement impact, closure Luo-coil 100 except annular around
Outside group 110, can also be between the terminal 120 of Circular Winding 110 and signal output part 125, along the center institute of Circular Winding 110
Circle, the loop circle 115 of coiling one.So when the alternation interference magnetic field for the paper direction in Fig. 1 occur, in loop line
Can produce between the starting point 120 and terminal 125 of circle 115 because alternation disturbs the voltage signal of magnetic field generation, this voltage signal
And the voltage signal between the starting point 130 and terminal 120 of Circular Winding 110, size approximately equal, opposite polarity, two voltages
The result of Signal averaging is approximately 0.So when the alternation interference magnetic field for the paper direction in Fig. 1 occur, in closure sieve
Interference voltage signal is hardly produced between the output end 125 and output end 130 of family name's coil 100.
Traditional Wound-rotor type closes Luo-coil as shown in Fig. 2 by the coiling on the skeleton of annular non-magnet material
Form, include Circular Winding and loop line circle.In coiling, a loop is placed along annular frame center position first
Circle, further around Circular Winding processed.The voltage signal that external interference magnetic field produces in the Circular Winding of closure Luo-coil, and loop line
The voltage signal size approximately equal produced on circle, opposite polarity, the result after superposition is approximately 0, this reduces outer
Boundary magnetic field is to closing the impact that Luo-coil is measured.
Traditional Wound-rotor type closure Luo-coil, coiling is typically completed by artificial or coil winding machine, it is difficult to accomplish coil
Uniform coiling, every circle coil section are equal, and have the shortcomings that easily broken string and layer capacitance increase error, in the industrial production
Parameter consistency hardly results in guarantee, so as to affect characteristic during Luo-coil measurement electric current.
In order to overcome traditional type to close the shortcoming of Luo-coil, occur in that and a kind of new Roche is closed by made by PCB
Coil, abbreviation PCB closure Luo-coils, as shown in the PCB closure Luo-coils 305 and 310 of the annular in Fig. 3.PCB is closed
Luo-coil adopts CAD (CAD), printed conductor (follow-up referred to as to connect up) is evenly arranged on PCB, such as
Shown in PCB closure Luo-coils 305 in Fig. 3.The astragal circle of Circular Winding one of PCB closure Luo-coils 305 is by top layer (with face
To reader PCB surface for PCB top layer, and the reverse another side of PCB top layers is PCB bottoms) wiring 315, connection top layer and
The plated through-hole (being subsequently referred to as via) 320 of bottom, bottom wiring 325 is constituted.The each astragal circle of PCB closure Luo-coils 305
Centered on annulus PCB centers, it is evenly arranged along annulus, wire turn section is perpendicular to PCB.
Because PCB adopts number processing technology, the coil that each astragal circle of PCB closure Luo-coils can be ensured from technique cuts
Area equation, the PCB closure Luo-coils produced, not only overcomes the shortcoming that traditional type closes Luo-coil, and sensitive
Degree, certainty of measurement and stability will be better than traditional coil by copper wire winding.Making PCB closure Luo-coils only needs
Its wiring diagram is drawn on computers, it is simple and efficient.PCB closes Luo-coil and is produced by Digit Control Machine Tool, it is to avoid it is loaded down with trivial details around
Process processed, can shorten the cycle of coil processing, improve the efficiency of production.PCB closures Luo-coil parameter during production in enormous quantities
Dispersiveness it is less, with a collection of coil produced, its distributed constant is basically identical.
PCB closes Luo-coil 305 when current measurement is carried out, and Circular Winding is except pickup to alternating current I (t) to be measured
Outside the changes of magnetic field of generation, also can pick up to other alternation interference magnetic fields in space.Such as when occur in Fig. 3 paper
During the alternation interference magnetic field in face direction, between the output end 345 and output end 350 of PCB closure Luo-coils 305 interference can be produced
Voltage signal.In order to resist the impact that external magnetic field closes the measurement of Luo-coil 305 to PCB, sieve can be closed using two pieces of PCB
Family name's coil is connected, and a combination PCB closure Luo-coil is constituted, as shown in figure 3, PCB closure Luo-coils 305 and PCB closures
Luo-coil 310 is connected, composition combination PCB closure Luo-coils 300.
PCB closes Luo-coil 310 and PCB closes the wiring mirror-image arrangement of Luo-coil 305, Circular Winding direction of winding
On the contrary.One astragal circle of PCB closure Luo-coils 310 is made up of bottom wiring 330, via 335 and top layer wiring 340, and right
One astragal circle of the PCB closure Luo-coils 305 answered is made up of top layer wiring 315, via 320 and bottom wiring 325.While bottom
Layer wiring 330 and top layer connect up 315, via 335 and via 320, top layer wiring 340 and 325 positions of bottom wiring are just the same.
Other each astragal circles are similarly such.
During composition combination PCB closure Luo-coils 300, on PCB closure Luo-coils 305 and PCB closure Luo-coils 310
Lower floor stacks puts, and PCB closes output end 345, the output end 350 of Luo-coil 305, and PCB closes the output of Luo-coil 310
End 355, output end 360, position is completely superposed.The output end 350 and PCB closure Luo-coils of PCB closure Luo-coils 305
310 output end 360 is connected, and realizes that PCB closure Luo-coils 305 and PCB close the series connection of Luo-coil 310.Combination PCB is closed
The output end 365 for closing Luo-coil 300 is connected with the output end 345 of closure Luo-coil 305, combination PCB closure Luo-coils
300 output end 370 is connected with the output end 355 of closure Luo-coil 310,
When the alternation interference magnetic field for the paper direction in Fig. 3 occur, PCB closes the output end of Luo-coil 305
The interference voltage signal produced between 345 and output end 350, and the output end 355 and output end of PCB closure Luo-coils 310
The interference voltage signal produced between 360, size is basically identical, opposite polarity.Luo-coil 305 and PCB closures are closed in PCB
In the case of Luo-coil 310 is connected, the result of the two interference signal superpositions is approximately 0.So when occur in Fig. 1 paper
During the alternation interference magnetic field in face direction, between the output end 365 and output end 370 of combination PCB closure Luo-coils 300 almost
Interference voltage signal will not be produced.
Two PCB that this processing method is used closure Luo-coil, although apart from close, but in extraneous magnetic fields
The interference of lower generation can not be completely the same, it is not possible to is completely counterbalanced by.Further, can be by the two PCB closure Roche lines
On monolithic PCB, two PCB closure Luo-coil series connection of so design can be better achieved reduction external magnetic field for circle design
The effect of interference.Fig. 4 A and Fig. 4 B are shown being in series by two groups of contrary coils of direction of winding on monolithic PCB
PCB closes Luo-coil (referring to HIGH PRECISION ROGOWSKI COIL, UNITED STATES PATENT, US 6
313 623 NOV.6 2001), Fig. 4 A be shown using alternative form be routed on monolithic PCB by two groups of direction of winding phases
PCB that anti-coil is in series closure Luo-coil, Fig. 4 B be shown using interdigited fashion be routed on monolithic PCB by
The PCB closure Luo-coils that two groups of contrary coils of direction of winding are in series.
The PCB being in series by two groups of contrary coils of direction of winding on monolithic PCB that Fig. 4 A and Fig. 4 B show is closed
Luo-coil scheme, although can preferably reduce the effect of external magnetic field interference, but two coils being designed so as to
Still it is not properly arrived at completely the same, it is impossible to realize eliminating the impact of external magnetic field interference well.
The total magnetic flux and sectional area that PCB closure Luo-coil Circular Windings are picked up is directly proportional, the sectional area of Circular Winding
Bigger, the total magnetic flux change picked up will be bigger, for same electric current to be measured, the letter of the output of PCB closure Luo-coils
Number also bigger, the detection sensitivity of PCB closure Luo-coils is higher.The sectional area and PCB of PCB closure Luo-coil Circular Windings
Thickness is directly proportional, and PCB thickness is bigger, and the sectional area of PCB closure Luo-coil Circular Windings is bigger, PCB closure Luo-coils
Detection sensitivity is higher.In order to improve the detection sensitivity that PCB closes Luo-coil, PCB thickness can be improved.But PCB is thick
Degree is limited by the processing technology of PCB, it is impossible to unconfined increase, while as PCB thickness increases, PCB processing costs also can be fast
Speed rises.Monolithic thickness PCB closes the cost of Luo-coil, can PCB thinner than polylith composition same thickness PCB closure Roches
Coil is much higher.Taking cost into account, monolithic thickness PCB closure Luo-coils are done, the polylith PCB not as doing the thin PCB compositions of polylith
Closure Luo-coil.
It is necessary to provide a kind of polylith PCB closures Luo-coil method for designing for this, can designs more on polylith PCB
For the contrary PCB closure Luo-coils of the direction of winding of two groups of consistent series connection, external magnetic field pair can be further reduced
The impact of measurement, improves the ability of polylith PCB closure Luo-coil antagonism external magnetic field interference, while polylith PCB can be reduced
Closure Luo-coil manufacturing cost.
The content of the invention
The invention provides a kind of polylith PCB closure Luo-coil methods for designing and reality that can resist external magnetic field interference
It is existing.
According to one aspect of the present invention, the invention discloses a kind of polylith PCB closures that can resist external magnetic field interference
Luo-coil method for designing, it includes：
(1) the polylith PCB closure Luo-coils of external magnetic field interference can be resisted, by the contrary coil string of two groups of direction of windings
Connection is formed, respectively the 1st coil and the 2nd coil.
(2) the polylith PCB closure Luo-coils of external magnetic field interference can be resisted, is formed by N blocks PCB layer is folded.Polylith PCB is closed
Close Luo-coil and be provided with two signal output parts, respectively the 1st signal output part and the 2nd signal output part.1st signal output part
It is 1PCB with the PCB that the 2nd signal output part is located, the PCB adjacent with 1PCB is 2PCB, if N >=3, with such
Push away, be followed successively by 3PCB, until N PCB.
4 foreign access points are provided with (3) 1PCB to N-1 PCB：1st foreign access point, the 2nd outside are accessed
Point, the 3rd foreign access point, the 4th foreign access point, the 1st foreign access point, the 3rd foreign access point are respectively 1PCB to N-1
The beginning and end of upper 1st coils of PCB, the 2nd foreign access point, the 4th foreign access point are respectively on 1PCB to N-1 PCB
The beginning and end of the 2nd coil.Two foreign access points are provided with N PCB：1st foreign access point, the 2nd outside are accessed
Point, the 1st foreign access point is the starting point of upper 1st coils of N PCB, and the 2nd foreign access point is rising for upper 2nd coils of N PCB
Point.
The 1st foreign access point on (4) 1PCB is the 1st signal output part, and the 2nd foreign access point on 1PCB is the
2 signal output parts.The 3rd foreign access point of lastblock PCB is accessed with the 1st outside on next piece of PCB in the adjacent PCB of stacking
Point is connected, and realizes the series connection of the 1st coiler part on the 1st coiler part and next piece of PCB on lastblock PCB, forms complete
The 1st coil.The 2nd foreign access point in the adjacent PCB of stacking on the 4th foreign access point and the next piece of PCB of lastblock PCB
It is connected, realizes the series connection of the 2nd coiler part on the 2nd coiler part and next piece of PCB on lastblock PCB, is formed complete
2nd coil.1st coil and the 2nd coil are directly together in series on N PCB, and formation can resist the polylith of external magnetic field interference
PCB closes Luo-coil.
(5) 1PCB to N PCB, every piece of PCB is in series by several identical component units, each group
Each astragal circle of the 1st coil and the 2nd coil is included into unit, this two astragals circle is closely adjacent.
(6) an astragal circle bag of the 1st coil of each component units of every piece of PCB of polylith PCB closures Luo-coil
Include：Inlet wire, coiling, outlet, inlet wire and outlet are respectively used to the upper component units of connection and next component units belong to the 1st
The wire turn of coil, coiling is surround by the via between the wiring positioned at different layers and different layers and is formed.Polylith PCB closes Roche line
One astragal circle of the 2nd coil of each component units of every piece of PCB of circle includes：Inlet wire, coiling, outlet, inlet wire and outlet
It is respectively used to connect a upper component units and next component units belongs to the wire turn of the 2nd coil, coiling is by positioned at different layers
Wiring and different layers between via around forming.
The inlet wire of one astragal circle of the 1st coil of the 1st component units of (7) 1PCB to N PCB is arrived with 1PCB
1st foreign access point of N PCB is connected, an astragal circle of the 2nd coil of the 1st component units of 1PCB to N PCB
Inlet wire be connected with the 2nd foreign access point of 1PCB to N PCB.Last 1 component units of 1PCB to N-1 PCB
The outlet of an astragal circle of the 1st coil be connected with the 3rd foreign access point of 1PCB to N-1 PCB, 1PCB to N-1
The outlet of one astragal circle of the 2nd coil of last 1 component units of PCB is accessed with the 4th outside of 1PCB to N-1 PCB
Point is connected.The outlet of one astragal circle of the 1st coil of last 1 component units of N PCB, last 1 group with N PCB
Into the outlet of an astragal circle of the 2nd coil of unit, it is joined directly together, realizes the string of the 1st coil and the 2nd coil on N PCB
Connection.
(8) can resist external magnetic field interference polylith PCB closure Luo-coil, each astragal circle of component units two around
Perpendicular to PCB surface, the section that coiling is surrounded is located on the cross section of PCB line plane, and the routing path of coiling is perpendicular to PCB
Overlap on the direction on surface.
(9) the polylith PCB closure Luo-coils of external magnetic field interference can be resisted, on every piece of PCB in each component units
The heart is evenly distributed on a magnetic line of force in the magnetic field that electric current to be measured is produced, the coiling section side of the astragal circle of all component units two
To along by the magnetic line of force normal direction of the coiling kernel of section, the coiling section of the astragal circle of all component units two and by this
Magnetic line of force tangential direction (i.e. magnetization direction) near normal of coiling kernel of section.
According to one aspect of the present invention, the invention discloses a polylith PCB closure that external magnetic field interference can be resisted
The specific embodiment of Luo-coil method for designing, the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, its bag
Include：
(1) the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, by the contrary line of two groups of direction of windings
Circle is in series, respectively the 1st coil and the 2nd coil.
(2) the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, is formed by the two-sided PCB layer of N blocks is folded.
The two-sided PCB closures Luo-coil of polylith is provided with two signal output parts, respectively the 1st signal output part and the 2nd signal output part.
The PCB that 1st signal output part and the 2nd signal output part are located is 1PCB, and the PCB adjacent with 1PCB is 2PCB, if N
>=3, then by that analogy, 3PCB is followed successively by, until N PCB.
4 foreign access points are provided with (3) 1PCB to N-1 PCB：1st foreign access point, the 2nd outside are accessed
Point, the 3rd foreign access point, the 4th foreign access point, the 1st foreign access point, the 3rd foreign access point are respectively 1PCB to N-1
The beginning and end of upper 1st coils of PCB, the 2nd foreign access point, the 4th foreign access point are respectively on 1PCB to N-1 PCB
The beginning and end of the 2nd coil.Two foreign access points are provided with N PCB：1st foreign access point, the 2nd outside are accessed
Point, the 1st foreign access point is the starting point of upper 1st coils of N PCB, and the 2nd foreign access point is rising for upper 2nd coils of N PCB
Point.
The 1st foreign access point on (4) 1PCB is the 1st signal output part, and the 2nd foreign access point on 1PCB is the
2 signal output parts.The 3rd foreign access point of lastblock PCB is accessed with the 1st outside on next piece of PCB in the adjacent PCB of stacking
Point is connected, and realizes the series connection of the 1st coiler part on the 1st coiler part and next piece of PCB on lastblock PCB, forms complete
The 1st coil.The 2nd foreign access point in the adjacent PCB of stacking on the 4th foreign access point and the next piece of PCB of lastblock PCB
It is connected, realizes the series connection of the 2nd coiler part on the 2nd coiler part and next piece of PCB on lastblock PCB, is formed complete
2nd coil.1st coil and the 2nd coil are directly together in series on N PCB, and formation can resist the polylith of external magnetic field interference
Two-sided PCB closes Luo-coil.
(5) 1PCB to N PCB, per block, two-sided PCB is in series by several identical component units, each
Individual component units include each astragal circle of the 1st coil and the 2nd coil, and this two astragals circle is closely adjacent.
(6) the two-sided PCB of polylith closes the one of the 1st coil of each component units of two-sided PCB per block of Luo-coil
Astragal circle includes：Inlet wire, coiling, outlet, inlet wire and outlet are respectively used to the upper component units of connection and next composition is single
Unit belongs to the wire turn of the 1st coil, and via of the coiling by the wiring positioned at top layer and bottom and between top layer, bottom surround and form.
The one astragal circle of the 2nd coil of each component units of two-sided PCB per block of the two-sided PCB closures Luo-coil of polylith includes：
Inlet wire, coiling, outlet, inlet wire and outlet are respectively used to the upper component units of connection and next component units belong to the 2nd line
The wire turn of circle, via of the coiling by the wiring positioned at top layer and bottom and between top layer, bottom surround and forms.
The inlet wire of one astragal circle of the 1st coil of the 1st component units of (7) 1PCB to N PCB is arrived with 1PCB
1st foreign access point of N PCB is connected, an astragal circle of the 2nd coil of the 1st component units of 1PCB to N PCB
Inlet wire be connected with the 2nd foreign access point of 1PCB to N PCB.Last 1 component units of 1PCB to N-1 PCB
The outlet of an astragal circle of the 1st coil be connected with the 3rd foreign access point of 1PCB to N-1 PCB, 1PCB to N-1
The outlet of one astragal circle of the 2nd coil of last 1 component units of PCB is accessed with the 4th outside of 1PCB to N-1 PCB
Point is connected.The outlet of one astragal circle of the 1st coil of last 1 component units of N PCB, last 1 group with N PCB
Into the outlet of an astragal circle of the 2nd coil of unit, it is joined directly together, realizes the string of the 1st coil and the 2nd coil on N PCB
Connection.
(8) the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, each astragal circle of component units two
Coiling plane perpendicular to two-sided PCB surface, the section that coiling is surrounded be located at two-sided PCB cross section on, the wiring topology of coiling
Footpath is overlapping on the direction of two-sided PCB surface.
(9) the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, each composition on two-sided PCB per block
The center of unit is evenly distributed on a magnetic line of force in the magnetic field that electric current to be measured is produced, the astragal circle of all component units two around
Line cross-wise direction is along by the magnetic line of force normal direction of the coiling kernel of section, the coiling section of the astragal circle of all component units two
With magnetic line of force tangential direction (i.e. magnetization direction) near normal for passing through the coiling kernel of section.
Description of the drawings
Fig. 1 shows closure Luo-coil.
Fig. 2 takes back traditional Wound-rotor type closure Luo-coil of wire turn.
Fig. 3 is shown to close the combination PCB closure Luo-coils that Luo-coil is in series by two pieces of mirror image PCB.
Fig. 4 A are shown on monolithic PCB using the contrary PCB of the direction of winding of two groups of series connection of alternative form wiring
Closure Luo-coil, Fig. 4 B are shown that on monolithic PCB the direction of winding of two groups of series connection using interdigited fashion wiring is contrary
PCB closure Luo-coil.
Fig. 5 A-5C are shown the specific embodiment built according to the method for designing of the present invention, and the two-sided PCB of N blocks is closed
The 1st piece of design to the two-sided PCB of N-1 blocks in Luo-coil is closed, Fig. 5 A are shown that the two-sided PCB of N blocks closes Luo-coil
In the 1st piece of top layer and the lamination of bottom to the two-sided PCB of N-1 blocks, Fig. 5 B are shown that the two-sided PCB of N blocks closes Roche line
The 1st piece of top layer to the two-sided PCB of N-1 blocks in circle, Fig. 5 C are shown the 1st piece in the two-sided PCB closures Luo-coil of N blocks
To the bottom of the two-sided PCB of N-1 blocks.
Fig. 6 A-6C are shown the specific embodiment built according to the method for designing of the present invention, and the two-sided PCB of N blocks is closed
The design of the two-sided PCB of nth block in Luo-coil is closed, Fig. 6 A are shown the nth block in the two-sided PCB closures Luo-coil of N blocks
The top layer of two-sided PCB and the lamination of bottom, Fig. 6 B are shown the two-sided PCB of nth block in the two-sided PCB closures Luo-coil of N blocks
Top layer, Fig. 6 C are shown the bottom of the two-sided PCB of nth block in N blocks two-sided PCB closure Luo-coils.
Fig. 7 A-7C show the local detail of the two-sided PCB of nth block in the two-sided PCB closures Luo-coil of N blocks.Fig. 7 A show
What is shown is the top layer and the lamination of bottom of the two-sided PCB local of nth block in the two-sided PCB closures Luo-coil of N blocks, and Fig. 7 B show
It is the top layer of the two-sided PCB local of nth block in the two-sided PCB closures Luo-coil of N blocks, Fig. 7 C are shown the two-sided PCB closures of N blocks
The bottom of the two-sided PCB local of nth block in Luo-coil.
Specific embodiment
Fig. 5 A-5C are shown the specific embodiment built according to the method for designing of the present invention, and the two-sided PCB of N blocks is closed
The 1st piece of design to the two-sided PCB of N-1 blocks in Luo-coil is closed, Fig. 5 A are shown that the two-sided PCB of N blocks closes Luo-coil
In the 1st piece of top layer and the lamination of bottom to the two-sided PCB of N-1 blocks, Fig. 5 B are shown that the two-sided PCB of N blocks closes Roche line
The 1st piece of top layer to the two-sided PCB of N-1 blocks in circle, Fig. 5 C are shown the 1st piece in the two-sided PCB closures Luo-coil of N blocks
To the bottom of the two-sided PCB of N-1 blocks.
The coil 500 on the 1st piece to the two-sided PCB of N-1 blocks in the two-sided PCB closures Luo-coil of N blocks, includes two groups
The contrary coil 501 and 502 of direction of winding, is respectively the 1st coil and the 2nd coil for constituting the two-sided PCB closures Luo-coil of N blocks
A part.
Coil 500 is provided with 4 foreign access points：503、504、505、506.Foreign access point 503 is used as coil 501
Starting point, foreign access point 505 as coil 501 terminal, foreign access point 504 as coil 502 starting point, foreign access point
506 as coil 502 terminal.
The signal that foreign access point 503 and foreign access point 504 also serve as the two-sided PCB closures Luo-coil of N blocks simultaneously is defeated
Go out end.Foreign access point 505 is used to connect the 1st coiler part on next piece of two-sided PCB, and foreign access point 506 is used to connect
The 2nd coiler part on next piece of two-sided PCB.
Coil 500 is in series by many identical component units, the component units 507 that such as Fig. 5 A show.Such as
Shown in Fig. 5 A, Fig. 5 B, Fig. 5 C, the center of component units 507, and the center of other component units, it is upper positioned at current－carrying conductor 105
On the circular magnetic line of force that the electric current crossed is produced, each component units is evenly distributed on this circular magnetic line of force.
Include each astragal circle of the contrary coil of two groups of direction of windings in each component units, component units 507 include
One astragal circle 508 of coil 501, an astragal circle 509 of coil 502, this two astragals circle is closely adjacent.Fig. 5 B show composition
The top layer portion 510 of the wire turn 508 of unit 507, the top layer portion 511 of wire turn 509.The top layer portion 510 of wire turn 508 and wire turn
509 top layer portion 511 is closely adjacent.Fig. 5 C show the floor portions 512 of the wire turn 508 of component units 507, wire turn 509
Floor portions 513.The floor portions 512 of wire turn 508 and the floor portions 513 of wire turn 509 are closely adjacent.
Fig. 6 A-6C are shown the specific embodiment built according to the method for designing of the present invention, and the two-sided PCB of N blocks is closed
The design of the two-sided PCB of nth block in Luo-coil is closed, Fig. 6 A are shown the nth block in the two-sided PCB closures Luo-coil of N blocks
The top layer of two-sided PCB and the lamination of bottom, Fig. 6 B are shown the two-sided PCB of nth block in the two-sided PCB closures Luo-coil of N blocks
Top layer, Fig. 6 C are shown the bottom of the two-sided PCB of nth block in N blocks two-sided PCB closure Luo-coils.
The coil 600 on the two-sided PCB of nth block in the two-sided PCB closures Luo-coil of N blocks, includes two groups of direction of windings
Contrary coil 601 and 602, is respectively to constitute the two-sided PCB of N blocks to close the 1st coil of Luo-coil and one of the 2nd coil
Point.
Coil 600 is provided with 2 foreign access points：603、604.Foreign access point 603 as coil 601 starting point, outward
Starting point of the portion's access point 604 as coil 602.Foreign access point 603 is used to connect the 1st coil portion on the two-sided PCB of lastblock
Point, foreign access point 604 is used to connect the 2nd coiler part on the two-sided PCB of lastblock.
Coil 600 is in series by many identical component units, the component units 605 that such as Fig. 6 A show.Such as
Shown in Fig. 6 A, Fig. 6 B, Fig. 6 C, the center of component units 605, and the center of other component units, it is upper positioned at current－carrying conductor 105
On the circular magnetic line of force that the electric current crossed is produced, each component units is evenly distributed on this circular magnetic line of force.
Include each astragal circle of the contrary coil of two groups of direction of windings in each component units, component units 605 include
One astragal circle 606 of coil 601, an astragal circle 607 of coil 602, this two astragals circle is closely adjacent.Fig. 6 B show composition
The top layer portion 608 of the wire turn 606 of unit 605, the top layer portion 609 of wire turn 607.The top layer portion 608 of wire turn 606 and wire turn
607 top layer portion 609 is closely adjacent.Fig. 6 C show the floor portions 610 of the wire turn 606 of component units 605, wire turn 607
Floor portions 611.The floor portions 610 of wire turn 606 and the floor portions 611 of wire turn 607 are closely adjacent.
The two-sided PCB coil 600 that the two-sided PCB coil 500 and Fig. 6 A-6C that Fig. 5 A-5C show shows is connected, it is possible to group
Into the closure Luo-coil folded by two pieces of two-sided PCB layers.The foreign access point 505 of the two-sided PCB coil 500 that Fig. 5 shows
Connect the foreign access point 603 of the 1st coiler part of two-sided PCB coil 600, foreign access point 506 connects two-sided PCB coil
The foreign access point 604 of 600 the 2nd coiler part, foreign access point 503 and foreign access point 504 are used as closure Luo-coil
Signal output part.
Fig. 7 A-7C show the local of the coil 600 on the two-sided PCB of nth block in the two-sided PCB closures Luo-coil of N blocks
Details.Fig. 7 A are shown the top layer of two-sided PCB closure Luo-coils 600 local of monolithic and the lamination of bottom, and Fig. 7 B show
It is the top layer of two-sided PCB closure Luo-coils 600 local of monolithic, Fig. 7 C are shown that the two-sided PCB of monolithic closes Luo-coil 600
The bottom of local.
Fig. 7 A show the top layer and the lamination of bottom of a component units 700 of the two-sided PCB closures Luo-coil of N blocks,
Including the laminate portion of an astragal circle 718 of the 1st coiler part coil 720, and the 2nd coil portion that another group of direction of winding is contrary
The laminate portion of one astragal circle 719 of sub-coil 721.The laminate portion of one astragal circle 718 of coil 720, including：Inlet wire 701,
Wiring 707, via 709, via 704, outlet 706.The laminate portion of one astragal circle 719 of coil 721, including：Inlet wire 702,
Wiring 708, via 710, via 703, outlet 705.
Fig. 7 B show the top layer of a component units 700 of closure PCB closure Luo-coils 600, including coil 720
The top layer portion of one astragal circle 718, and the top layer portion of an astragal circle 719 of the contrary coil 721 of another group of direction of winding.Line
The top layer portion of one astragal circle 718 of circle 720, includes：Via 709, wiring 714, via 704.One astragal circle of coil 721
719 top layer portion, includes：Inlet wire 702, wiring 715, via 710, via 703, outlet 705.
Fig. 7 C show the bottom of a component units 700 of closure PCB closure Luo-coils 600, including coil 720
The floor portions of one astragal circle 718, and the floor portions of an astragal circle 719 of the contrary coil 721 of another group of direction of winding.Line
The floor portions of one astragal circle 718 of circle 720, include：Inlet wire 701, wiring 716, via 709, via 704, outlet 706.
The floor portions of one astragal circle 719 of coil 721, include：Via 710, wiring 717, via 703.
Fig. 7 A, Fig. 7 B, Fig. 7 C show that closure PCB closes the square of an astragal circle 718 of the coil 720 of Luo-coil 600
Shape winding portion, is made up of wiring 714, via 709, wiring 716, via 704, and the top layer of rectangle winding portion connects up 714 Hes
Bottom wiring 716, is being to overlap on the direction of PCB surface.One circle of the contrary coil 721 of another group of direction of winding
The rectangle winding portion of wire turn 719, is made up of, the bottom of rectangle winding portion wiring 717, via 710, wiring 715, via 703
Layer wiring 717 and top layer wiring 715 are being to overlap on the direction of PCB surface.
Fig. 7 A, Fig. 7 B, Fig. 7 C show that closure PCB closes an astragal of a component units 700 of Luo-coil 600
The rectangle coiling cross-wise direction of circle 718, and an astragal circle of a component units 700 of closure PCB closure Luo-coils 600
719 rectangle coiling cross-wise direction, along by closure PCB the center of Luo-coil 600 and penetrating for the coiling kernel of section are closed
Line direction, that is, close each component units center place magnetic line of force that PCB closes Luo-coil 600, in the coiling kernel of section
The normal direction of position.
Fig. 7 A, Fig. 7 B, Fig. 7 C show that closure PCB closes an astragal of a component units 700 of Luo-coil 600
The rectangle coiling section of circle 718, and an astragal circle 719 of a component units 700 of closure PCB closure Luo-coils 600
Rectangle coiling section, and hung down by closing the directions of rays at center and the coiling kernel of section that PCB closes Luo-coil 600
Directly, that is, each component units center place magnetic line of force that PCB closes Luo-coil 600 is closed, in the coiling kernel of section position
Tangential direction.
Fig. 7 A, Fig. 7 B, Fig. 7 C show that closure PCB is closed and is provided with outer on first component units of Luo-coil 600
Portion's access point 711, connects the inlet wire of the first circle coil of the coil 720 of first component units, closure PCB closure Luo-coils
Foreign access point 712 is provided with 600 first component units, connects another group of direction of winding phase of first component units
The inlet wire of the first circle coil of anti-coil 721.Foreign access point 711 is used to connect the 1st coil portion on the two-sided PCB of lastblock
Point, foreign access point 712 is used to connect the 2nd coiler part on the two-sided PCB of lastblock.
Fig. 7 A, Fig. 7 B, Fig. 7 C show, close on last component units 713 of PCB closure Luo-coils 600, line
Two outlets between the via 722 of circle 720, and the via 723 of the contrary coil 721 of another group of direction of winding, directly pass through
Wiring 724 is connected, and realizes between the contrary coil 720 and 721 of two groups of direction of windings of closure PCB closure Luo-coils 600
Series connection.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (2)
1. a kind of polylith PCB that can resist external magnetic field interference closes Luo-coil method for designing, and it includes：
(1) the polylith PCB closure Luo-coils of external magnetic field interference can be resisted, by the contrary coils series connection of two groups of direction of windings
Into respectively the 1st coil and the 2nd coil；
(2) the polylith PCB closure Luo-coils of external magnetic field interference can be resisted, is formed by N blocks PCB layer is folded；Polylith PCB closes sieve
Family name's coil is provided with two signal output parts, respectively the 1st signal output part and the 2nd signal output part；1st signal output part and
The PCB that 2 signal output parts are located is 1PCB, and the PCB adjacent with 1PCB is 2PCB, if N >=3, by that analogy, according to
Secondary is 3PCB, until N PCB；
4 foreign access points are provided with (3) 1PCB to N-1PCB：1st foreign access point, the 2nd foreign access point, the 3rd
Foreign access point, the 4th foreign access point, the 1st foreign access point, the 3rd foreign access point are respectively on 1PCB to N-1PCB
The beginning and end of the 1st coil, the 2nd foreign access point, the 4th foreign access point are respectively upper 2nd lines of 1PCB to N-1PCB
The beginning and end of circle；Two foreign access points are provided with N PCB：1st foreign access point, the 2nd foreign access point, the 1st
Foreign access point is the starting point of upper 1st coils of N PCB, and the 2nd foreign access point is the starting point of upper 2nd coils of N PCB；
The 1st foreign access point on (4) 1PCB is the 1st signal output part, and the 2nd foreign access point on 1PCB is the 2nd letter
Number output end；The 1st foreign access point in the adjacent PCB of stacking on the 3rd foreign access point and the next piece of PCB of lastblock PCB
It is connected, realizes the series connection of the 1st coiler part on the 1st coiler part and next piece of PCB on lastblock PCB, is formed complete
1st coil；The 2nd foreign access point phase in the adjacent PCB of stacking on the 4th foreign access point and the next piece of PCB of lastblock PCB
Even, the series connection of the 2nd coiler part on the 2nd coiler part and next piece of PCB on lastblock PCB is realized, complete the 2nd is formed
Coil；1st coil and the 2nd coil are directly together in series on N PCB, and formation can resist the polylith PCB of external magnetic field interference
Closure Luo-coil；
(5) 1PCB to N PCB, every piece of PCB is in series by several identical component units, and each composition is single
Unit includes each astragal circle of the 1st coil and the 2nd coil, and this two astragals circle is closely adjacent；
(6) an astragal circle of the 1st coil of each component units of every piece of PCB of polylith PCB closures Luo-coil includes：Enter
Line, coiling, outlet, inlet wire and outlet are respectively used to the upper component units of connection and next component units belong to the 1st coil
Wire turn, coiling is by the via between the wiring positioned at different layers and different layers around forming；Polylith PCB closure Luo-coils
One astragal circle of the 2nd coil of each component units of every piece of PCB includes：Inlet wire, coiling, outlet, inlet wire and outlet are distinguished
Belong to the wire turn of the 2nd coil for connecting a upper component units and next component units, coiling is by the cloth positioned at different layers
Via between line and different layers surround and forms；
The inlet wire and 1PCB to N of one astragal circle of the 1st coil of the 1st component units of (7) 1PCB to N PCB
1st foreign access point of PCB is connected, and an astragal circle of the 2nd coil of the 1st component units of 1PCB to N PCB enters
Line is connected with the 2nd foreign access point of 1PCB to N PCB；The 1st of last 1 component units of 1PCB to N-1PCB
The outlet of one astragal circle of coil is connected with the 3rd foreign access point of 1PCB to N-1PCB, and 1PCB is to N-1PCB's
The outlet of one astragal circle of the 2nd coil of last 1 component units and the 4th foreign access point phase of 1PCB to N-1PCB
Even；The outlet of one astragal circle of the 1st coil of last 1 component units of N PCB, it is single with last 1 composition of N PCB
The outlet of one astragal circle of the 2nd coil of unit, is joined directly together, and realizes the series connection of the 1st coil and the 2nd coil on N PCB；
(8) the polylith PCB closure Luo-coils of external magnetic field interference can be resisted, the coiling of each astragal circle of component units two is put down
Perpendicular to PCB surface, the section that coiling is surrounded is located on the cross section of PCB, and the routing path of coiling is perpendicular to PCB surface in face
Direction on overlap；
(9) the polylith PCB closure Luo-coils of external magnetic field interference can be resisted, the center of each component units is equal on every piece of PCB
It is even to be distributed on a magnetic line of force in the magnetic field that electric current to be measured is produced, the coiling cross-wise direction edge of the astragal circle of all component units two
By the magnetic line of force normal direction of the coiling kernel of section, the coiling section of the astragal circle of all component units two and by the coiling
The magnetic line of force tangential direction (i.e. magnetization direction) of kernel of section is vertical.
2. a kind of polylith PCB closure Luo-coil methods for designing that can resist external magnetic field interference, can resist external magnetic field interference
The two-sided PCB of polylith close Luo-coil, it includes：
(1) the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, by the contrary coil string of two groups of direction of windings
Connection is formed, respectively the 1st coil and the 2nd coil；
(2) the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, is formed by the two-sided PCB layer of N blocks is folded；Polylith
Two-sided PCB closures Luo-coil is provided with two signal output parts, respectively the 1st signal output part and the 2nd signal output part；1st
The PCB that signal output part and the 2nd signal output part are located is 1PCB, and the PCB adjacent with 1PCB is 2PCB, if N >=
3, then by that analogy, 3PCB is followed successively by, until NPCB；
4 foreign access points are provided with (3) 1PCB to N-1PCB：1st foreign access point, the 2nd foreign access point, the 3rd
Foreign access point, the 4th foreign access point, the 1st foreign access point, the 3rd foreign access point are respectively on 1PCB to N-1PCB
The beginning and end of the 1st coil, the 2nd foreign access point, the 4th foreign access point are respectively upper 2nd lines of 1PCB to N-1PCB
The beginning and end of circle；Two foreign access points are provided with N PCB：1st foreign access point, the 2nd foreign access point, the 1st
Foreign access point is the starting point of upper 1st coils of N PCB, and the 2nd foreign access point is the starting point of upper 2nd coils of N PCB；
The 1st foreign access point on (4) 1PCB is the 1st signal output part, and the 2nd foreign access point on 1PCB is the 2nd letter
Number output end；The 1st foreign access point in the adjacent PCB of stacking on the 3rd foreign access point and the next piece of PCB of lastblock PCB
It is connected, realizes the series connection of the 1st coiler part on the 1st coiler part and next piece of PCB on lastblock PCB, is formed complete
1st coil；The 2nd foreign access point phase in the adjacent PCB of stacking on the 4th foreign access point and the next piece of PCB of lastblock PCB
Even, the series connection of the 2nd coiler part on the 2nd coiler part and next piece of PCB on lastblock PCB is realized, complete the 2nd is formed
Coil；1st coil and the 2nd coil are directly together in series on N PCB, and the polylith that formation can resist external magnetic field interference is two-sided
PCB closes Luo-coil；
(5) 1PCB to N PCB, per block, two-sided PCB is in series by several identical component units, each group
Each astragal circle of the 1st coil and the 2nd coil is included into unit, this two astragals circle is closely adjacent；
(6) the two-sided PCB of polylith closes one astragal of the 1st coil of each component units of two-sided PCB per block of Luo-coil
Circle includes：Inlet wire, coiling, outlet, inlet wire and outlet are respectively used to the upper component units of connection and next component units category
In the wire turn of the 1st coil, via of the coiling by the wiring positioned at top layer and bottom and between top layer, bottom surround and forms；Polylith
The one astragal circle of the 2nd coil of each component units of two-sided PCB per block of two-sided PCB closures Luo-coil includes：Inlet wire,
Coiling, outlet, inlet wire and outlet are respectively used to connect a upper component units and next component units belong to the line of the 2nd coil
Circle, via of the coiling by the wiring positioned at top layer and bottom and between top layer, bottom surround and forms；
The inlet wire and 1PCB to N of one astragal circle of the 1st coil of the 1st component units of (7) 1PCB to N PCB
1st foreign access point of PCB is connected, and an astragal circle of the 2nd coil of the 1st component units of 1PCB to N PCB enters
Line is connected with the 2nd foreign access point of 1PCB to N PCB；The 1st of last 1 component units of 1PCB to N-1PCB
The outlet of one astragal circle of coil is connected with the 3rd foreign access point of 1PCB to N-1PCB, and 1PCB is to N-1PCB's
The outlet of one astragal circle of the 2nd coil of last 1 component units and the 4th foreign access point phase of 1PCB to N-1PCB
Even；The outlet of one astragal circle of the 1st coil of last 1 component units of N PCB, it is single with last 1 composition of N PCB
The outlet of one astragal circle of the 2nd coil of unit, is joined directly together, and realizes the series connection of the 1st coil and the 2nd coil on N PCB；
(8) the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, each astragal circle of component units two around
Perpendicular to two-sided PCB surface, the section that coiling is surrounded is located on the cross section of two-sided PCB line plane, and the routing path of coiling exists
Overlap on the direction of two-sided PCB surface；
(9) the two-sided PCB of polylith that can resist external magnetic field interference closes Luo-coil, each component units on two-sided PCB per block
Center be evenly distributed on a magnetic line of force in the magnetic field that electric current to be measured is produced, the coiling of the astragal circle of all component units two cuts
Face direction along by the magnetic line of force normal direction of the coiling kernel of section, the coiling section of the astragal circle of all component units two and logical
The magnetic line of force tangential direction (i.e. magnetization direction) for crossing the coiling kernel of section is vertical.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310289012.6A CN104284515B (en) | 2013-07-11 | 2013-07-11 | Designing method for magnetic-field-interference resistant multi-PCB closed Rogowski coil and implementation |
| US14/890,906 US10739384B2 (en) | 2013-06-18 | 2014-05-23 | PCB Rogowski coil |
| PCT/CN2014/078242 WO2014201937A1 (en) | 2013-06-18 | 2014-05-23 | Pcb rogowski coil |
| EP14813582.5A EP3012846B1 (en) | 2013-06-18 | 2014-05-23 | Pcb rogowski coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310289012.6A CN104284515B (en) | 2013-07-11 | 2013-07-11 | Designing method for magnetic-field-interference resistant multi-PCB closed Rogowski coil and implementation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104284515A CN104284515A (en) | 2015-01-14 |
| CN104284515B true CN104284515B (en) | 2017-04-19 |
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| CN201310289012.6A Active CN104284515B (en) | 2013-06-18 | 2013-07-11 | Designing method for magnetic-field-interference resistant multi-PCB closed Rogowski coil and implementation |
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| JPWO2019102569A1 (en) | 2017-11-24 | 2020-11-19 | 新電元工業株式会社 | Manufacturing method of semiconductor parts, unions and semiconductor parts |
| CN111373272B (en) * | 2017-11-24 | 2022-07-01 | 新电元工业株式会社 | Substrate for inspection, assembly, and method for manufacturing substrate for inspection |
| CN109100558B (en) * | 2018-06-06 | 2021-11-16 | 中国电力科学研究院有限公司 | Rogowski coil and current measuring device |
| CN109856441B (en) * | 2019-04-15 | 2024-05-10 | 华北电力大学 | Crimping type IGBT device chip current online measurement system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988076A (en) * | 2005-12-02 | 2007-06-27 | 松下电工株式会社 | Alternating current detection coil |
| CN202929092U (en) * | 2012-12-14 | 2013-05-08 | 广西星宇智能电气有限公司 | High-precision Rogowski coil current transformer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61202405A (en) * | 1985-03-06 | 1986-09-08 | Hitachi Ltd | Coil |
| US7791440B2 (en) * | 2004-06-09 | 2010-09-07 | Agency For Science, Technology And Research | Microfabricated system for magnetic field generation and focusing |
-
2013
- 2013-07-11 CN CN201310289012.6A patent/CN104284515B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988076A (en) * | 2005-12-02 | 2007-06-27 | 松下电工株式会社 | Alternating current detection coil |
| CN202929092U (en) * | 2012-12-14 | 2013-05-08 | 广西星宇智能电气有限公司 | High-precision Rogowski coil current transformer |
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