CN104237591A - Designing method and achievement for single PCB closed rogowski coil resisting magnetic field interference - Google Patents
Designing method and achievement for single PCB closed rogowski coil resisting magnetic field interference Download PDFInfo
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- CN104237591A CN104237591A CN201310239226.2A CN201310239226A CN104237591A CN 104237591 A CN104237591 A CN 104237591A CN 201310239226 A CN201310239226 A CN 201310239226A CN 104237591 A CN104237591 A CN 104237591A
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Abstract
The invention provides a designing method and achievement for a single PCB closed rogowski coil resisting magnetic field interference. The single PCB closed rogowski coil is formed by connecting a first coil and a second coil in series, the first coil and the second coil are arranged on a single PCB, and the winding direction of the first coil is opposite to the winding direction of the second coil. The single PCB closed rogowski coil comprises a plurality of same constitutional units which are connected in series, and the centers of the constitutional units are evenly distributed on a magnetic line of a magnetic field produced by current to be detected. Each constitutional unit comprises a circle of wire turn of the first coil and a circle of wire turn of the second coil, wherein the two wire turns are closely attached to each other. Each wire turn comprises an inlet wire, an outlet wire and a winding wire. The two outlet wires of the last constitutional unit are directly connected. The winding wires are formed by wires in different layers and holes among the different layers in a surrounding mode, the plane of each winding wire is perpendicular to the PCB surface, and the wiring routes of the winding wires coincide with one another in the direction perpendicular to the PCB surface. The normal direction of the magnetic line passing through the center of the section of the winding wires is approximately same with the direction of the section of the winding wires, and the tangential direction is approximately perpendicular to the section of the winding wires.
Description
Technical field
The present invention relates generally to PCB (printed circuit board (PCB)) Luo-coil in current sensor, is specifically related to a kind of anti-magnetic interference monolithic PCB and closes Luo-coil method for designing and realization.
Background technology
Roche (Rogowski) coil is the coil formed on the framework of the nonmagnetic substance of sectional uniform equably by wire.Luo-coil because of its have lightweight, bandwidth, the linearity are good and without features such as magnetic saturation phenomenons, be widely used in current measuring device.Whether can open when Luo-coil is measured according to it, closed Luo-coil and opening Luo-coil can be divided into.What Fig. 1 showed is closed Luo-coil.
Closed Luo-coil 100 comprises as lower part:
(1) signal output part 125 and signal output part 130;
(2) from signal output part 130 around the Circular Winding 110 to Circular Winding terminal 120;
(3) from Circular Winding terminal 120 annularly winding center to the loop line circle 115 of signal output part 125.
When the closed Luo-coil 100 of application measures electric current, need first current－carrying conductor 105 to be passed closed Luo-coil 100.In order to ensure measuring accuracy, need to allow current－carrying conductor 105 pass perpendicularly through the center of closed Luo-coil 100, the center of current－carrying conductor 105 and the center superposition of closed Luo-coil 100.Closed Luo-coil 100 is looped around around current－carrying conductor 105, when alternating current I (t) to be measured flows through current－carrying conductor 105, alternating current I (t) to be measured can produce AC magnetic field around current－carrying conductor 105, the circle that it is the center of circle that the magnetic line of force is approximately with current－carrying conductor 105 center, the closed each astragal circle center of Luo-coil 100 Circular Winding 110 is located on a circular magnetic line of force wherein.The sectional area that the closed each astragal circle of Luo-coil 100 Circular Winding 110 is corresponding is equal, Circular Winding 110 each astragal circle cross-wise direction is consistent with the magnetic line of force normal direction (namely this kernel of section is to current－carrying conductor 105 center radius direction) crossing this kernel of section, and cross section is vertical with the tangential direction of this circular magnetic line of force.The magnetic flux φ of each wire turn of closed Luo-coil Circular Winding can be ensured like this
i(t) approximately equal, and this magnetic flux and electric current are directly proportional.
Φ
i(t)＝L·I(t) 1)
Alternating current I (t) to be measured produces the change of magnetic flux in the volume that closed Luo-coil 100 Circular Winding is surrounded, can be closed Luo-coil 100 and convert the voltage signal proportional with each wire turn total magnetic flux differential to, be exactly output voltage signal V (t) between the output terminal 125 of closed Luo-coil 100 and output terminal 130.
Can obtain after simplification, closed Luo-coil output voltage signal V (t) is approximate proportional with the differential of alternating current I (t).
Carry out integration to closed Luo-coil output voltage signal V (t), just can obtain the signal proportional with alternating current I (t), Here it is closes the principle that Luo-coil measures alternating current.
I(t)＝K·∫V(t)dt 4)
It is higher that closed Luo-coil measures current precision; measuring-signal band is roomy, and can realize electrical isolation with lower cost and measure, withstand current ability is almost infinitely great; be applicable to the accurate measurement with fixed position current－carrying conductor electric current, can the fields such as relay protection be applied to.
Closed Luo-coil 100 is when carrying out current measurement, and Circular Winding 110, except the changes of magnetic field that pickup produces to alternating current I (t) to be measured, also can pick up other alternation disturbing magnetic fields in space.Such as when there is the alternation disturbing magnetic field in paper direction in perpendicular to Fig. 1, the voltage signal because alternation disturbing magnetic field produces between the starting point 130 of Circular Winding 110 and terminal 120, will be produced.
In order to resist the impact that external magnetic field is measured closed Luo-coil 100, closed Luo-coil 100 is except Circular Winding 110, also can between the terminal 120 of Circular Winding 110 and signal output part 125, the annularly circle at the place, center of winding 110, coiling one loop circle 115.Like this when there is the alternation disturbing magnetic field in paper direction in perpendicular to Fig. 1, the voltage signal because alternation disturbing magnetic field produces can be produced between the starting point 120 and terminal 125 of loop line circle 115, voltage signal between the starting point 130 of this voltage signal and Circular Winding 110 and terminal 120, size approximately equal, polarity is contrary, and the result of two voltage signal superpositions is approximately 0.Like this when there is the alternation disturbing magnetic field in paper direction in perpendicular to Fig. 1, between the output terminal 125 and output terminal 130 of closed Luo-coil 100, produce interference voltage signal hardly.
Traditional Wound-rotor type closes Luo-coil as shown in Figure 2, is formed by coiling on the skeleton of annular non-magnet material, includes Circular Winding and loop line circle.When coiling, first place a loop circle along annular frame center position, then coiling Circular Winding.The voltage signal that external interference magnetic field produces in the Circular Winding of closed Luo-coil, with the voltage signal size approximately equal that loop line circle produces, polarity is contrary, and the result after superposition is approximately 0, this reduces the impact that external magnetic field is measured closed Luo-coil.
Traditional Wound-rotor type closes Luo-coil, coiling has normally been come by artificial or winder, be difficult to accomplish the even coiling of coil, often circle coil section is equal, and have easily broken string and layer capacitance to increase the shortcomings such as error, parameter consistency is difficult to be guaranteed in the industrial production, thus characteristic when affecting Luo-coil measurement electric current.
Closing the shortcoming of Luo-coil in order to overcome traditional type, having occurred a kind of novel closed Luo-coil be made up of PCB, be called for short PCB and close Luo-coil, the PCB as the annular in Fig. 3 closes shown in Luo-coil 305 and 310.PCB closes Luo-coil and adopts computer-aided design (CAD) (CAD), is evenly arranged on PCB, as the PCB in Fig. 3 closes shown in Luo-coil 305 by printed conductor (follow-up referred to as wiring).PCB closes the Circular Winding one astragal circle of Luo-coil 305 by the top layer (top layer being PCB with the PCB surface towards reader, the another side reverse with PCB top layer is PCB bottom) connect up 315, connect the plated through-hole (follow-up referred to as via hole) 320 of top layer and bottom, bottom wiring 325 composition.PCB closes each astragal circle of Luo-coil 305 centered by annulus PCB center, and be evenly arranged along annulus, wire turn cross section orthogonal is in PCB.
Because PCB adopts number processing technology, can ensure that the coil section that PCB closes Luo-coil each astragal circle amasss equal from technique, the PCB produced closes Luo-coil, not only overcome the shortcoming that traditional type closes Luo-coil, and sensitivity, measuring accuracy and stability are all better than traditional coil by copper wire winding.Making PCB closes Luo-coil and only its wiring diagram need be drawn on computers, simple and efficient.PCB closes Luo-coil and is produced by numerically-controlled machine, avoids loaded down with trivial details winding process, can shorten the cycle of coil processing, improves the efficiency of producing.During production in enormous quantities, to close the dispersiveness of Luo-coil parameter less for PCB, and with a collection of coil produced, its distribution parameter is basically identical.
PCB closes Luo-coil 305 when carrying out current measurement, and Circular Winding, except the changes of magnetic field that pickup produces to alternating current I (t) to be measured, also can pick up other alternation disturbing magnetic fields in space.Such as when there is the alternation disturbing magnetic field in paper direction in perpendicular to Fig. 3, PCB closes between the output terminal 345 of Luo-coil 305 and output terminal 350 can produce interference voltage signal.In order to resist external magnetic field on PCB close Luo-coil 305 measure impact, two pieces of PCB can be adopted to close Luo-coil series connection, form a combination PCB and close Luo-coil, as shown in Figure 3, PCB closes Luo-coil 305 and PCB and closes Luo-coil 310 and connect, and composition combination PCB closes Luo-coil 300.
PCB closes the wiring mirror-image arrangement that Luo-coil 310 and PCB close Luo-coil 305, and Circular Winding direction of winding is contrary.The astragal circle that PCB closes Luo-coil 310 is made up of bottom wiring 330, via hole 335 and top layer wiring 340, and the astragal circle that the PCB of correspondence closes Luo-coil 305 is made up of top layer wiring 315, via hole 320 and bottom wiring 325.Simultaneously bottom wiring 330 and top layer wiring 315, via hole 335 and via hole 320, top layer wiring 340 and bottom 325 positions of connecting up are just the same.Other each astragal circles are like this too.
When composition combination PCB closes Luo-coil 300, PCB closes Luo-coil 305 and PCB closes the placement of Luo-coil 310 stacked on top of one another, PCB closes output terminal 345, the output terminal 350 of Luo-coil 305, and PCB closes output terminal 355, the output terminal 360 of Luo-coil 310, and position overlaps completely.The output terminal 350 that PCB closes Luo-coil 305 is connected with the output terminal 360 that PCB closes Luo-coil 310, realizes PCB and closes the series connection that Luo-coil 305 and PCB close Luo-coil 310.The output terminal 365 that combination PCB closes Luo-coil 300 is connected with the output terminal 345 of closed Luo-coil 305, and the output terminal 370 that combination PCB closes Luo-coil 300 is connected with the output terminal 355 of closed Luo-coil 310,
When there is the alternation disturbing magnetic field in paper direction in perpendicular to Fig. 3, PCB closes the interference voltage signal produced between the output terminal 345 of Luo-coil 305 and output terminal 350, with PCB closes the interference voltage signal produced between the output terminal 355 of Luo-coil 310 and output terminal 360, size is basically identical, and polarity is contrary.Under PCB closes Luo-coil 305 and PCB closes Luo-coil 310 series connection situation, the result of these two undesired signal superpositions is approximately 0.Like this when there is the alternation disturbing magnetic field in paper direction in perpendicular to Fig. 1, closing between the output terminal 365 of Luo-coil 300 and output terminal 370 at combination PCB and producing interference voltage signal hardly.
Two PCB that this disposal route uses close Luo-coil, although distance is very near, the interference produced under extraneous magnetic fields can not be completely the same, cannot offset completely.Further, these two PCB can be closed Luo-coil design on monolithic PCB, two PCB of design like this close the effect that Luo-coil series connection can realize reducing external magnetic field interference better.What Fig. 4 A and Fig. 4 B showed is on monolithic PCB closes Luo-coil (see HIGH PRECISION ROGOWSKI COIL by the PCB of the contrary coils connected in series of two groups of direction of windings, UNITED STATES PATENT, US 6 313 623 NOV.62001), the PCB of what Fig. 4 A showed the is coils connected in series contrary by two groups of direction of windings adopting alternative form to be routed on monolithic PCB closes Luo-coil, the PCB of what Fig. 4 B showed the is coils connected in series contrary by two groups of direction of windings adopting interdigited fashion to be routed on monolithic PCB closes Luo-coil.
What Fig. 4 A and Fig. 4 B showed closes Luo-coil scheme by the PCB of the contrary coils connected in series of two groups of direction of windings on monolithic PCB, although the effect of external magnetic field interference can be reduced better, but two coils of design so still do not reach completely the same well, the impact eliminating external magnetic field interference can not be realized well.Be necessary to provide a kind of monolithic PCB to close Luo-coil method for designing for this reason, the monolithic PCB that can design two groups of more consistent direction of windings of connecting contrary closes Luo-coil, further can reduce external magnetic field to the impact of measuring, improve the ability that monolithic PCB closes the interference of Luo-coil antagonism external magnetic field.
Summary of the invention
The invention provides a kind of monolithic PCB that can resist external magnetic field interference and close Luo-coil method for designing and realization.
According to one aspect of the present invention, the invention discloses a kind of monolithic PCB that can resist external magnetic field interference and close Luo-coil method for designing, it comprises:
(1) the monolithic PCB that can resist external magnetic field interference closes Luo-coil, the coil contrary by the direction of winding of two groups of series connection: the first coil and the second coil form, first coil and the second coil are positioned on monolithic PCB, first coil and the second coils connected in series get up, and composition monolithic PCB closes Luo-coil.
(2) the monolithic PCB that can resist external magnetic field interference closes Luo-coil, and the component units identical by several is in series, and each component units includes an astragal circle of the first coil and an astragal circle of the second coil, and this two astragals circle is closely adjacent.
(3) the astragal circle that monolithic PCB closes the first coil of each component units of Luo-coil comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the first coil, coiling by the via hole between the wiring and different layers of different layers around forming.The astragal circle that monolithic PCB closes the second coil of each component units of Luo-coil comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the second coil, coiling by the via hole between the wiring and different layers of different layers around forming.
(4) the monolithic PCB that can resist external magnetic field interference closes Luo-coil and is provided with two signal output parts: the first signal output part and secondary signal output terminal, what be connected with the first signal output part is the inlet wire of the wire turn of the first coil of first component units, and what be connected with secondary signal output terminal is the inlet wire of the wire turn of the second coil of first component units.Adjacent with first component units is second component units, by that analogy, and a to the last component units.The outlet of the wire turn of the first coil of last component units, is directly connected with the outlet of the wire turn of the second coil of last component units, realizes monolithic PCB and closes series connection between the first coil of Luo-coil and the second coil.
(5) the monolithic PCB that can resist external magnetic field interference closes Luo-coil, the coiling plane orthogonal of the wire turn of the first coil of each component units is in PCB surface, the cross section that coiling surrounds is positioned on the xsect of PCB, and the routing path of coiling overlaps on the direction perpendicular to PCB surface.The coiling plane orthogonal of the wire turn of the second coil of each component units is in PCB surface, and the cross section that coiling surrounds is positioned on the xsect of PCB, and the routing path of coiling overlaps on the direction perpendicular to PCB surface.
(6) the monolithic PCB that can resist external magnetic field interference closes Luo-coil, and the center of all component units is evenly distributed on a magnetic line of force in the magnetic field that electric current to be measured produces.The coiling cross-wise direction of the wire turn of the first coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the first coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.The coiling cross-wise direction of the wire turn of the second coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the second coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.
According to one aspect of the present invention, the invention discloses a monolithic PCB that can resist external magnetic field interference and close the specific embodiment of Luo-coil method for designing, the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, and it comprises:
(1) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, coil first coil contrary by the direction of winding of two groups of series connection and the second coil form, first coil and the second coil are positioned on the two-sided PCB of monolithic, first coil and the second coils connected in series get up, and the two-sided PCB of composition monolithic closes Luo-coil.
(2) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, the component units identical by several is in series, each component units includes an astragal circle of the first coil and an astragal circle of the second coil, and this two astragals circle is closely adjacent.
(3) the astragal circle that the two-sided PCB of monolithic closes the first coil of each component units of Luo-coil comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the first coil, coiling by the via hole between the wiring and top layer bottom of top layer and bottom around forming.The astragal circle that the two-sided PCB of monolithic closes the second coil of each component units of Luo-coil comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the second coil, coiling by the via hole between the wiring and top layer bottom of top layer and bottom around forming.
(4) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil and is provided with two signal output parts: the first signal output part and secondary signal output terminal, what be connected with the first signal output part is the inlet wire of the wire turn of the first coil of first component units, and what be connected with secondary signal output terminal is the inlet wire of the wire turn of the second coil of first component units.Adjacent with first component units is second component units, by that analogy, and a to the last component units.The outlet of the wire turn of the first coil of last component units, is directly connected with the outlet of the wire turn of the second coil of last component units, realizes the two-sided PCB of monolithic and closes series connection between the first coil of Luo-coil and the second coil.
(5) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, the coiling plane orthogonal of the wire turn of the first coil of each component units is in two-sided PCB surface, the cross section that coiling surrounds is positioned on the xsect of PCB, and the routing path of coiling overlaps on the direction perpendicular to two-sided PCB surface.The coiling plane orthogonal of the wire turn of the second coil of each component units is in two-sided PCB surface, and the cross section that coiling surrounds is positioned on the xsect of two-sided PCB, and the routing path of coiling overlaps on the direction perpendicular to two-sided PCB surface.
(6) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, and the center of all component units is evenly distributed on a magnetic line of force in the magnetic field that electric current to be measured produces.The coiling cross-wise direction of the wire turn of the first coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the first coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.The coiling cross-wise direction of the wire turn of the second coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the second coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.
Accompanying drawing explanation
Fig. 1 shows closed Luo-coil.
Traditional Wound-rotor type that Fig. 2 takes back wire turn closes Luo-coil.
Fig. 3 display be close by two pieces of mirror image PCB the combination PCB that Luo-coil is in series to close Luo-coil.
The PCB that the direction of windings of adopt alternative form connect up on monolithic PCB two groups series connection that what Fig. 4 A showed is are contrary closes Luo-coil, and the PCB that two groups of direction of windings of connecting that what Fig. 4 B showed is adopts interdigited fashion to connect up on monolithic PCB are contrary closes Luo-coil.
What Fig. 5 showed is the specific embodiment built according to method for designing of the present invention, and the two-sided PCB of monolithic closes Luo-coil.What Fig. 5 A showed is the lamination that the two-sided PCB of monolithic closes Luo-coil top layer and bottom, and what Fig. 5 B showed is the top layer that the two-sided PCB of monolithic closes Luo-coil, and what Fig. 5 C showed is the bottom that the two-sided PCB of monolithic closes Luo-coil.
Fig. 6 shows the local detail that the two-sided PCB of monolithic closes Luo-coil.What Fig. 6 A showed is that the two-sided PCB of monolithic closes the top layer of Luo-coil local and the lamination of bottom, and what Fig. 6 B showed is the top layer that the two-sided PCB of monolithic closes Luo-coil local, and what Fig. 6 C showed is the bottom that the two-sided PCB of monolithic closes Luo-coil local.
Embodiment
What Fig. 5 showed is the specific embodiment built according to method for designing of the present invention, the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil 500, be applicable to measure and pass perpendicularly through PCB and close the electric current that the current－carrying conductor 105 at Luo-coil 500 center flows through, the alternating magnetic field magnetic line of force that this electric current produces is that gang closes with PCB the circle that Luo-coil 500 center is the center of circle.What Fig. 5 A showed is the lamination that the two-sided PCB of monolithic closes Luo-coil top layer and bottom, and what Fig. 5 B showed is the top layer that the two-sided PCB of monolithic closes Luo-coil, and what Fig. 5 C showed is the bottom that the two-sided PCB of monolithic closes Luo-coil.
The two-sided PCB of monolithic closes Luo-coil 500 and includes the contrary coil 501 and 502 of two groups of direction of windings, and coil 501 and coil 502 are together in series, and composition PCB closes Luo-coil 500.The two-sided PCB of monolithic closes Luo-coil 500 and is in series by many identical component units, as the component units 503 that Fig. 5 A shows.As shown in Fig. 5 A, Fig. 5 B, Fig. 5 C, the center of component units 503, and the center of other component units, be positioned on a circular magnetic line of force of the electric current generation that current－carrying conductor 105 flows through, each component units is evenly distributed on this circular magnetic line of force.
Comprise each astragal circle of the contrary coil of two groups of direction of windings in each component units, component units 503 includes an astragal circle 504 of coil 501, an astragal circle 505 of coil 502, and this two astragals circle is closely adjacent.Fig. 5 B shows the top layer part 506 of the wire turn 504 of component units 503, the top layer part 507 of wire turn 505.The top layer part 506 of wire turn 504 is closely adjacent with the top layer part 507 of wire turn 506.Fig. 5 C shows the floor portions 508 of the wire turn 504 of component units 503, the floor portions 509 of wire turn 505.The floor portions 508 of wire turn 504 is closely adjacent with the floor portions 509 of wire turn 506.
Fig. 6 shows the local detail that the two-sided PCB of monolithic closes Luo-coil 500.What Fig. 6 A showed is that the two-sided PCB of monolithic closes the top layer of Luo-coil 500 local and the lamination of bottom, what Fig. 6 B showed is the top layer that the two-sided PCB of monolithic closes Luo-coil 500 local, and what Fig. 6 C showed is the bottom that the two-sided PCB of monolithic closes Luo-coil 500 local.
Fig. 6 A shows the top layer of a component units 600 and the lamination of bottom that closed PCB closes Luo-coil 500, comprises the laminate portion of an astragal circle 618 of coil 620, the laminate portion of an astragal circle 619 of the coil 621 contrary with another group direction of winding.The laminate portion of one astragal circle 618 of coil 620, comprising: inlet wire 601, wiring 607, via hole 609, via hole 604, outlet 606.The laminate portion of one astragal circle 619 of coil 621, comprising: inlet wire 602, wiring 608, via hole 610, via hole 603, outlet 605.
Fig. 6 B shows the top layer that closed PCB closes a component units 600 of Luo-coil 500, comprises the top layer part of an astragal circle 618 of coil 620, the top layer part of an astragal circle 619 of the coil 621 contrary with another group direction of winding.The top layer part of one astragal circle 618 of coil 620, includes: via hole 609, wiring 616, via hole 604.The top layer part of one astragal circle 619 of coil 621, includes: inlet wire 602, wiring 617, via hole 610, via hole 603, outlet 605.
Fig. 6 C shows the bottom that closed PCB closes a component units 600 of Luo-coil 500, comprises the floor portions of an astragal circle 618 of coil 620, the floor portions of an astragal circle 619 of the coil 621 contrary with another group direction of winding.The floor portions of one astragal circle 618 of coil 620, includes: inlet wire 601, wiring 614, via hole 609, via hole 604, outlet 606.The floor portions of one astragal circle 619 of coil 621, includes: via hole 610, wiring 615, via hole 603.
Fig. 6 A, Fig. 6 B, Fig. 6 C show, closed PCB closes the rectangle winding portion of an astragal circle 618 of the coil 620 of Luo-coil 500, be made up of wiring 616, via hole 609, wiring 614, via hole 604, the top layer wiring 616 of rectangle winding portion and bottom wiring 614 are overlapping on the direction perpendicular to PCB surface.The rectangle winding portion of one astragal circle 619 of the coil 621 that another group direction of winding is contrary, be made up of wiring 615, via hole 610, wiring 617, via hole 603, bottom wiring 615 and the top layer wiring 617 of rectangle winding portion are overlapping on the direction perpendicular to PCB surface.
Fig. 6 A, Fig. 6 B, Fig. 6 C show, closed PCB closes the rectangle coiling cross-wise direction of an astragal circle 618 of a component units 600 of Luo-coil 500, and closed PCB closes the rectangle coiling cross-wise direction of an astragal circle 619 of a component units 600 of Luo-coil 500, the center of Luo-coil 500 and the directions of rays of this coiling kernel of section is closed along by closed PCB, namely closed PCB closes each place, component units center magnetic line of force of Luo-coil 500, in the normal direction of this coiling kernel of section position.
Fig. 6 A, Fig. 6 B, Fig. 6 C show, closed PCB closes the rectangle coiling cross section of an astragal circle 618 of a component units 600 of Luo-coil 500, and closed PCB closes the rectangle coiling cross section of an astragal circle 619 of a component units 600 of Luo-coil 500, vertical with the directions of rays of this coiling kernel of section with the center closing Luo-coil 500 by closed PCB, namely closed PCB closes each place, component units center magnetic line of force of Luo-coil 500, in the tangential direction of this coiling kernel of section position.
Fig. 6 A, Fig. 6 B, Fig. 6 C show, first component units that closed PCB closes Luo-coil 500 is provided with foreign access point 611, connect the inlet wire of the first circle coil of the coil 620 of first component units, first component units that closed PCB closes Luo-coil 500 is provided with foreign access point 612, connects the inlet wire of the first circle coil of the contrary coil 621 of another group direction of winding of first component units.Foreign access point 611, foreign access point 612 close the two ends of the output signal of Luo-coil 500 as closed PCB.
Fig. 6 A, Fig. 6 B, Fig. 6 C show, closed PCB closes on last component units 613 of Luo-coil 500, the via hole 622 of coil 620, two outlets between the via hole 623 of the coil 621 contrary with another group direction of winding, directly be connected by wiring 624, the series connection between the coil 620 and 621 that two groups of direction of windings that the closed PCB of realization closes Luo-coil 500 are contrary.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (10)
1., according to one aspect of the present invention, the invention discloses a kind of monolithic PCB that can resist external magnetic field interference and close Luo-coil method for designing, it comprises:
(1) the monolithic PCB that can resist external magnetic field interference closes Luo-coil, the coil contrary by the direction of winding of two groups of series connection: the first coil and the second coil form, first coil and the second coil are positioned on monolithic PCB, first coil and the second coils connected in series get up, and composition monolithic PCB closes Luo-coil.
(2) the monolithic PCB that can resist external magnetic field interference closes Luo-coil, and the component units identical by several is in series, and each component units includes an astragal circle of the first coil and an astragal circle of the second coil, and this two astragals circle is closely adjacent.
(3) the astragal circle that monolithic PCB closes the first coil of each component units of Luo-coil comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the first coil, coiling by the via hole between the wiring and different layers of different layers around forming.The astragal circle that monolithic PCB closes the second coil of each component units of Luo-coil comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the second coil, coiling by the via hole between the wiring and different layers of different layers around forming.
(4) the monolithic PCB that can resist external magnetic field interference closes Luo-coil and is provided with two signal output parts: the first signal output part and secondary signal output terminal, what be connected with the first signal output part is the inlet wire of the wire turn of the first coil of first component units, and what be connected with secondary signal output terminal is the inlet wire of the wire turn of the second coil of first component units.Adjacent with first component units is second component units, by that analogy, and a to the last component units.The outlet of the wire turn of the first coil of last component units, is directly connected with the outlet of the wire turn of the second coil of last component units, realizes monolithic PCB and closes series connection between the first coil of Luo-coil and the second coil.
(5) the monolithic PCB that can resist external magnetic field interference closes Luo-coil, the coiling plane orthogonal of the wire turn of the first coil of each component units is in PCB surface, the cross section that coiling surrounds is positioned on the xsect of PCB, and the routing path of coiling overlaps on the direction perpendicular to PCB surface.The coiling plane orthogonal of the wire turn of the second coil of each component units is in PCB surface, and the cross section that coiling surrounds is positioned on the xsect of PCB, and the routing path of coiling overlaps on the direction perpendicular to PCB surface.
(6) the monolithic PCB that can resist external magnetic field interference closes Luo-coil, and the center of all component units is evenly distributed on a magnetic line of force in the magnetic field that electric current to be measured produces.The coiling cross-wise direction of the wire turn of the first coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the first coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.The coiling cross-wise direction of the wire turn of the second coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the second coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.
2., according to one aspect of the present invention, the invention discloses a monolithic PCB that can resist external magnetic field interference and close the specific embodiment of Luo-coil method for designing, the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, and it comprises:
(1) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, coil first coil contrary by the direction of winding of two groups of series connection and the second coil form, first coil and the second coil are positioned on the two-sided PCB of monolithic, first coil and the second coils connected in series get up, and the two-sided PCB of composition monolithic closes Luo-coil.
(2) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, the component units identical by several is in series, each component units includes an astragal circle of the first coil and an astragal circle of the second coil, and this two astragals circle is closely adjacent.
(3) the astragal circle that the two-sided PCB of monolithic closes the first coil of each component units of Luo-coil comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the first coil, coiling by the via hole between the wiring and top layer bottom of top layer and bottom around forming.The astragal circle that the two-sided PCB of monolithic closes the second coil of each component units of Luo-coil comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the second coil, coiling by the via hole between the wiring and top layer bottom of top layer and bottom around forming.
(4) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil and is provided with two signal output parts: the first signal output part and secondary signal output terminal, what be connected with the first signal output part is the inlet wire of the wire turn of the first coil of first component units, and what be connected with secondary signal output terminal is the inlet wire of the wire turn of the second coil of first component units.Adjacent with first component units is second component units, by that analogy, and a to the last component units.The outlet of the wire turn of the first coil of last component units, is directly connected with the outlet of the wire turn of the second coil of last component units, realizes the two-sided PCB of monolithic and closes series connection between the first coil of Luo-coil and the second coil.
(5) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, the coiling plane orthogonal of the wire turn of the first coil of each component units is in two-sided PCB surface, the cross section that coiling surrounds is positioned on the xsect of PCB, and the routing path of coiling overlaps on the direction perpendicular to two-sided PCB surface.The coiling plane orthogonal of the wire turn of the second coil of each component units is in two-sided PCB surface, and the cross section that coiling surrounds is positioned on the xsect of two-sided PCB, and the routing path of coiling overlaps on the direction perpendicular to two-sided PCB surface.
(6) the two-sided PCB of monolithic that can resist external magnetic field interference closes Luo-coil, and the center of all component units is evenly distributed on a magnetic line of force in the magnetic field that electric current to be measured produces.The coiling cross-wise direction of the wire turn of the first coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the first coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.The coiling cross-wise direction of the wire turn of the second coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the second coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.
3. the two-sided PCB of monolithic according to claim 2 closes Luo-coil, it is characterized in that: the two-sided PCB of described monolithic closes Luo-coil, by being positioned at the contrary coil of the upper two groups of direction of windings of the two-sided PCB of this block: the first coil and the second coil form, first coil and the second coils connected in series get up, and the two-sided PCB of composition monolithic closes Luo-coil.
4. the two-sided PCB of monolithic according to claim 2 closes Luo-coil, it is characterized in that: the two-sided PCB of described monolithic closes Luo-coil and is in series by several identical component units.
5. the two-sided PCB of monolithic according to claim 2 closes Luo-coil, it is characterized in that: the center that the two-sided PCB of described monolithic closes all component units of Luo-coil is evenly distributed on a magnetic line of force in the magnetic field that electric current to be measured produces.
6. the two-sided PCB of monolithic according to claim 2 closes Luo-coil, it is characterized in that: each component units that the two-sided PCB of described monolithic closes Luo-coil includes each astragal circle of the first coil and the second coil, and this two astragals circle is closely adjacent.
7. the two-sided PCB of monolithic according to claim 2 closes Luo-coil, it is characterized in that: the two-sided PCB of described monolithic close each component units of Luo-coil an astragal circle of the first coil comprise: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the first coil, coiling by the via hole between the wiring and top layer bottom of top layer and bottom around forming.One astragal circle of the second coil of each component units comprises: inlet wire, coiling, outlet, inlet wire and outlet are respectively used to be connected the wire turn that a upper component units and next component units belong to the second coil, coiling by the via hole between the wiring and top layer bottom of top layer and bottom around forming.
8. the two-sided PCB of monolithic according to claim 2 closes Luo-coil, it is characterized in that: the two-sided PCB of described monolithic closes Luo-coil and is provided with two signal output parts: the first signal output part and secondary signal output terminal, what be connected with the first signal output part is the inlet wire of the wire turn of the first coil of first component units, and what be connected with secondary signal output terminal is the inlet wire of the wire turn of the second coil of first component units.Adjacent with first component units is second component units, by that analogy, and a to the last component units.The outlet of the wire turn of the first coil of last component units, is directly connected with the outlet of the wire turn of the second coil of last component units, realizes the two-sided PCB of monolithic and closes series connection between the first coil of Luo-coil and the second coil.
9. the two-sided PCB of monolithic according to claim 2 closes Luo-coil, it is characterized in that: described monolithic two-sided PCB closes Luo-coil, the coiling plane orthogonal of the wire turn of the first coil of each component units is in two-sided PCB surface, the cross section that coiling surrounds is positioned on the xsect of PCB, and the routing path of coiling overlaps on the direction perpendicular to two-sided PCB surface.The coiling plane orthogonal of the wire turn of the second coil of each component units is in two-sided PCB surface, and the cross section that coiling surrounds is positioned on the xsect of two-sided PCB, and the routing path of coiling overlaps on the direction perpendicular to two-sided PCB surface.
10. the two-sided PCB of monolithic according to claim 2 closes Luo-coil, it is characterized in that: the coiling cross-wise direction that the two-sided PCB of described monolithic closes the wire turn of the first coil of all component units of Luo-coil is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the first coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.The coiling cross-wise direction of the wire turn of the second coil of all component units is approximately the magnetic line of force normal direction by this coiling kernel of section, the coiling cross section of the wire turn of the second coil and magnetic line of force tangential direction (i.e. magnetization direction) near normal by this coiling kernel of section.
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| CN201310239226.2A CN104237591B (en) | 2013-06-18 | 2013-06-18 | Designing method and achievement for single PCB closed rogowski coil resisting magnetic field interference |
| EP14813582.5A EP3012846B1 (en) | 2013-06-18 | 2014-05-23 | Pcb rogowski coil |
| 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 |
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| CN201310239226.2A CN104237591B (en) | 2013-06-18 | 2013-06-18 | Designing method and achievement for single PCB closed rogowski coil resisting magnetic field interference |
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| CN104237591B CN104237591B (en) | 2017-05-17 |
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