WO2008026281A1

WO2008026281A1 - Inductive coupling device

Info

Publication number: WO2008026281A1
Application number: PCT/JP2006/317211
Authority: WO
Inventors: Hiroshi Isoya; Yuichiro Murata; Takao Tsurimoto
Original assignee: Mitsubishi Electric Corporation
Priority date: 2006-08-31
Filing date: 2006-08-31
Publication date: 2008-03-06
Also published as: JPWO2008026281A1

Abstract

An inductive coupling device comprising a first trapezoidal core element having a first recess, for passing a first conductor therethrough, in one of two parallel sides, a second trapezoidal core element having a second recess, opposing the first recess, in a side on the first core element side out of two parallel sides which are parallel with the above-mentioned two parallel sides of the first core element and having a gap formed between the side having the second recess and the side, having the first recess, of the first core element, and a second conductor penetrating the second recess in the second core element and coupled electromagnetically with the first conductor through the first and second core elements, wherein the surface of a gap between the first and second core elements can be machined precisely so that stabilization and enhancement of one quality of individual products (inductive coupling device), i.e. the coupling efficiency, can be expected.

Description

Specification

Inductive coupling device

Technical field

The present invention relates to an inductive coupling device in which a second conductor is electromagnetically coupled to a first conductor via a first core element portion and a second core element portion in which a gap is formed between them. It is a thing.

Background art

[0002] An inductive coupling device in which a second conductor is electromagnetically coupled to a first conductor via a first core element portion and a second core element portion in which a gap is formed between the first core element portion, for example, data on a power line An inductive coupling device that superimposes a signal is disclosed in, for example, Japanese Translation of PCT International Publication No. 2005-525021 (Patent Document 1). In the inductive coupling device described in Patent Document 1, a magnetic core that includes a first core element portion and a second core element portion that are formed with a gap therebetween and surrounds a power line, and an excitation coil that surrounds the magnetic core. Is used to transmit a signal current to the excitation coil, for example, a signal is transmitted to the excitation coil through a communication modem power signal line, and the signal is superimposed on the power line via the magnetic core.

[0003] Patent Document 1: Japanese Translation of Special Publication 2005-525021 (Fig. 4 and its explanation)

Disclosure of the invention

Problems to be solved by the invention

[0004] In an inductive coupling device in which a second conductor is electromagnetically coupled to a first conductor via a first core element portion and a second core element portion in which a gap is formed between them, the product quality Stabilization and improvement of coupling efficiency, which is one of the technical issues, is one of the technical issues. Therefore, the gap formed between the first core element part and the second core element part extends over the entire area. For this reason, it is desirable to have a uniform gap length. For this reason, it is preferable to cut and polish the gap surface with high accuracy. This is not limited to the inductive coupling device used for power line carrier communication as described in Patent Document 1, but via the first core element portion and the second core element portion in which a gap is formed between them. This is true for inductive coupling devices in which the second conductor is electromagnetically coupled to the first conductor. [0005] When the gap surface is cut and polished, as in the inductive coupling device described in Patent Document 1, the first core element portion and the second core element portion in which a gap is formed between them are half If the shape is circular, the outer peripheral surface of the element that becomes the supported surface of the first core element part and the second core element part during cutting and polishing is arc-shaped, so the first core during processing Since the first core element part and the second core element part are rotated along the arc-shaped outer peripheral surface by the force acting on the element part and the second core element part, the gap after the cutting process is performed. The surface may be a flat surface or may be inclined with respect to the ideal gap surface. As a result, the gap formed between the first core element portion and the second core element portion must have a uniform gap length over the entire area.

That is, as shown in FIG. 9 of the present application, the first core element portion 1 or the second core element portion 2 rotates in the direction of arrow A or B along its arcuate outer peripheral surface 21oss. Move. For example, when the gap face gsa is machined or polished, the force acting on the gap face gsa due to machining causes the first core element part 1 or the second core element part 2 to be Rotate in the direction of arrow A along the arc-shaped outer peripheral surface 21 oss, which is the supported surface of. Similarly, when the gap surface gsb is cut or polished, the first core element portion 1 or the second core element portion 2 is processed by the force WFB acting on the gap surface gsb by the processing. It rotates in the direction of arrow B along the arc-shaped outer peripheral surface 21oss that becomes the supported surface at the time. As a result of turning in the direction of arrows A and B when machining the first core element part 1 or the second core element part 2, the gap surfaces gsa and gsb after cutting and polishing become flat surfaces. It is not or is inclined with respect to the ideal gap surface. In other words, the gap surfaces gsa and gsb are not processed with high accuracy, and the stability and improvement of coupling efficiency, which is one of the product qualities of individual products (inductive coupling devices), cannot always be fully expected.

[0007] The present invention has been made in view of the above-described circumstances, and it is expected that the coupling efficiency, which is one of the product qualities of individual products (inductive coupling devices), is stable and improved. The purpose is to allow the gap surface of the gap between the core element part and the second core element part to be processed with high accuracy.

Means for solving the problem

[0008] In the inductive coupling device according to the present invention, the first conductor passes through one side of two parallel sides. A trapezoidal first core element portion having a first recess, and one of the two parallel sides parallel to the parallel two sides of the first core element portion on the first core element portion side. A gap is formed between the side having the second recess facing the first recess on the side and the side having the second recess and the side having the first recess of the first core element portion. The trapezoidal second core element part, and the first core element part and the second core element part through the second recess of the second core element part and the first core element part A second conductor that is electromagnetically coupled to the conductor is provided. Since the first core element portion and the second core element portion are trapezoidal, when the gap surface is cut or polished, the force acting on the gap surface due to the processing is The element part or the second core element part is supported by one straight side of two parallel sides and Z or a straight side connected to the one side. Therefore, the gap surface is cut and polished. When machining, the first core element part and the second core element part do not rotate like the conventional inductive coupling device described above due to the force acting on the gap surface due to the machining. The gap surface of the gap between the first core element part and the second core element part can be fully expected to stabilize and improve the coupling efficiency, which is one of the product quality of our products (inductive coupling devices). It becomes possible to process with high accuracy, The workability of the machining and the workability of measuring the machining accuracy of the gap surface are also improved.

The invention's effect

The inductive coupling device according to the present invention includes a trapezoidal first core element portion having a first recess through which a first conductor passes on one side of two parallel sides, and the parallel of the first core element portion. Of the two parallel sides that are parallel to the two sides, the side on the first core element portion side has a second recess facing the first recess and the side having the second recess and the first A trapezoidal second core element part in which a gap is formed between the first core element part and the side having the first concave part, and the second concave part of the second core element part passes through the second concave part. And a second conductor that is electromagnetically coupled to the first conductor via the first core element portion and the second core element portion! Gap in the gap between the first core element part and the second core element part can be expected to stabilize and improve the coupling efficiency, which is one of the product quality The-up surface is precisely machined can be effectively.

BEST MODE FOR CARRYING OUT THE INVENTION [0010] Embodiment 1.

Embodiment 1 of the present invention will be described below with reference to FIGS. Fig. 1 is a front view showing an example of the overall structure of the inductive coupling device, as seen from the left side of Fig. 2. Fig. 2 is a vertical left side view showing a partial cross-section as viewed in the direction of the arrow II II in Fig. 1. The gap length between the first core element and the second core element is determined by the core translation mechanism. It is a vertical left side view in a state close to a state where a predetermined gap length is obtained. FIG. 3 is an enlarged view showing the core element portion, where (a) is a side view, (b) is a plan view, and (c) is a front view corresponding to FIG.

As illustrated in FIG. 1, an inductive coupling device 100 according to Embodiment 1 of the present invention includes an upper first core element portion (hereinafter abbreviated as “upper core”) 1, Lower second core element portion (hereinafter abbreviated as “lower core”) 2, predetermined gap length regulating member 3, clamp mechanism 4, and elastic member (hereinafter referred to as “upper core pressing panel”) 5, positioning pin 7, bolt (hereinafter referred to as “core drive bolt”) 8, coupler body insulator 9, positioning member (hereinafter referred to as “power line presser”) 10, core case 11, Secondary winding 12 (hereinafter referred to as “secondary winding 12”) as the second conductor, external lead-out conductor 1002 for leading the secondary winding 12 to the outside, support plate 14, nut 18 And a bolt 19, and is attached to a power line 13 (hereinafter referred to as “power line 13”) which is a first conductor serving as a communication medium. The power line 13 is a first conductor that is electromagnetically coupled to the secondary winding (second conductor) 12 in the inductive coupling device 100 via the upper core 1 and the lower core 2.

As clearly shown in FIG. 2, the upper core 1 on the upper side is fixed to the core case 11, and the lower core 2 on the lower side is inductively coupled when the coupler main body 9 is molded. Molded integrally with the device body 9. The secondary core 12 that is a part of a signal line is wound around the lower core 2.

[0013] One end of the upper core pressing panel 5 is fixed to the core case 11, and the upper core pressing panel 5 is further fixed to one end of the support plate 14.

[0014] The support plate 14 is formed in a substantially L shape as shown in the figure, and the core drive bolt 8 is screwed into the nut 18 fixed to the other end of the support plate 14. Match. Further, the positioning pin 7 implanted in the coupler main body insulator 9 is inserted into a substantially long hole 141 formed in an intermediate portion of the support plate 14. The core case 11, the upper core pressing panel 5, and the support plate 14 constitute a core holding mechanism 1145 that holds the upper core 1.

[0016] The support plate 14 having the substantially elongated hole 141 and the positioning pin 7 prevent the core holding mechanism 1145 from rotating around the bolt as the core driving bolt 8 rotates. A positioning mechanism 147 that holds the core holding mechanism 1145 at a predetermined position is configured.

[0017] The core holding mechanism 1145, the positioning mechanism 147, the nut 18, and the core driving bolt 8 are used to move the upper core 1 in parallel with the lower core (in the illustrated example, in the vertical direction). The translation mechanism 1478 is configured.

A predetermined gap length regulating member 3 is interposed between each of the pair of legs of the upper core 1 and the pair of legs of the lower core 2.

[0019] As clearly shown in FIG. 1, the clamp mechanism 4 is disposed at symmetrical positions on both sides of the power line 13 in the extending direction (left and right sides in FIG. 1) around the coupler main body insulator 9. The power line 13 is arranged under the clamp arm 41 of the clamp mechanism 4.

The power line presser 10 is provided between the power line 13 and the coupler main body insulator 9, and the power line presser 10 is fixed to the coupler main body insulator 9 with the bolt 19. Has been.

[0021] Each of the upper core 1 and the lower core 2 is formed of a magnetic material such as ferrite, and contacts the predetermined gap length regulating member 3 together with the predetermined gap length regulating member 3 of each leg portion of both. The leg end surface is finished with high accuracy.

The predetermined gap length restriction member 3 is sandwiched between the left and right leg portions of the upper core 1 and the lower core 2 so that the predetermined gap length restriction member 3 and the upper core 1 and the lower core 2 are in close contact with each other. The predetermined gap length regulating member 3, the upper core 1 and the lower core 2 are integrally combined to form a magnetic core 123 having a gap core force.

[0022] A combination of the secondary winding 12, the magnetic core 123, and the power line 13 transmitting a signal constitutes an inductive coupling device.

[0023] Since the magnetic flux passes through the predetermined gap length restricting member 3 in the gap length direction (vertical direction in FIGS. 1 and 2), the predetermined gap length regulating member 3 is non-shielded so as not to be shielded by eddy currents. It is made of a conductive material. Further, in the present embodiment, the predetermined gap length regulating member 3 is fixed to the lower core 2 by adhesion, and is attached to the lower core 2 side as shown.

[0024] The core case 11 that holds and holds the upper core 1 is formed of a rustic material such as stainless steel and has a bowl shape with an opening on the lower side, and a pair of members fixed to the inside thereof. The upper core 1 is fixed to the core case 11 by inertially engaging the retaining pins 111 with the recesses 1G on both shoulders of the upper core 1. Even if the upper core 1 is disposed below the core case 11, the upper core 1 is firmly fixed to the core case 11 by the locking pins 111.

[0025] The upper core holding spring 5 is a leaf spring, and at one end thereof, the upper core holding spring 5 extends downward in the figure (in other words, in the gap length direction of the predetermined gap length regulating member 3) via the core case 11. It works to press the upper core 1.

[0026] One end of the support plate 14 is welded to the other end of the upper core pressing spring 5. The nut 18 is fixed to the other end of the support plate 14, and the nut 18 is screwed to the tip of the core drive bolt 8. The core drive bolt 8 is attached to the first arm 91 of the coupler main body insulator 9 so as to be rotatable and immovable in the axial direction of the rotation. The support plate 14 and the core drive bolt 8 are any force that holds the upper core 1, the solid binding material 111, the core case 11, and the upper core pressing spring 5 so as not to be deformed at this time. Has sufficient rigidity.

The rotation operation portion 81 of the core drive bolt 8 is located below the first arm portion 91. When the rotation operation unit 81 is rotated, the core drive bolt 8 rotates. If the core drive bolt 8 rotates, the support plate 14 also tries to rotate, but this follow-up rotation is blocked by the positioning pin 7 inserted through the substantially long hole 141 of the support plate 14. . Therefore, if the core drive bolt 8 is rotated by the rotation operation of the rotation operation portion 81, the core drive bolt 8 does not move in the axial direction of the rotation, so that the nut 18 is moved in the axial direction of the rotation. Moving. That is, if the rotation operation portion 81 is rotated in one direction, the nut 18 is raised, and if it is rotated in the other direction, the nut 18 is lowered. As the nut 18 rises and falls, the support plate 14, the upper core holding plate 5, the core case 11, and the upper core 1 also rise and fall. In this way, the support plate 14 having the substantially elongated hole 141 and the positioning pin 7 rotate around the bolt of the core holding mechanism portion accompanying the rotation of the core drive bolt 8. A positioning mechanism 147 that blocks and holds the core holding mechanism in a predetermined position is configured.

[0029] An axial direction of the rotation of the core driving bolt 8 (in other words, an extending direction of the core driving bolt 8) is parallel to an extending direction of the positioning pin 7, and the predetermined gap length regulating member 3 The upper core 1 moves in parallel with the lower core 2 when the core drive bolt 8 rotates and the upper core 1 moves up and down as the core drive bolt 8 rotates. And then it will be.

The clamp mechanism 4 has a clamp arm 41 whose side surface shape is tapered as shown in FIG. 2, and the power line 13 is connected to the base portion of the narrow projecting portion of the clamp arm 41. To facilitate gripping, a recess 42 is provided along the outer shape of the power line 13, and this recess 42 prevents the power line 13 from coming off when the clamp arm 41 is lowered. The clamp arm 41 is fixed to the coupler main body insulator portion 9 with a clamp bolt 16, and the clamp arm 41 is moved up and down by rotating the clamp bolt 16. The power line retainer 10 is made of a metal material, and sandwiches the power line 3 together with the clamp arm 41 to hold the power line 3

[0031] Second and third arms extending from the coupler body insulator 9 to symmetrical positions on both sides of the power line 13 in the extending direction (left and right sides in FIG. 1) around the coupler body insulator 9 The clamp bolt 16 is attached to each of the portions 92 and 93 so as to be rotatable and immovable in the axial direction of the rotation. The clamp arm 41 is screwed to the tip screw portion of each clamp bolt 16.

The rotation operation portion 161 of each of the clamping bolts 16 is located below the corresponding second and third arm portions 92 and 93. The respective rotation operation parts 161 and 161 are arranged on the lower side which is the same side of the rotation operation part 81 of the core driving bolt 8 and the coupler main body insulator part 9.

[0032] The power line retainer 10 includes the power line 13 of the second and third arm portions 92, 93. Are attached to the respective mounting surfaces on the other side with screws 19 corresponding to the respective clamp arms 41, 41.

[0033] When the rotation operation unit 161 is rotated, the clamp bolt 16 is rotated. When the clamp bolt 16 rotates, the corresponding clamp arm 41 also tries to rotate, and the following rotation is prevented by the power line presser 10. Therefore, if the clamp bolt 16 is rotated by the rotation operation of the rotation operation portion 161, the clamp bolt 16 does not move in the axial direction of the rotation, so that the corresponding clamp arm 41 is rotated. Move in the direction of the axis. That is, if the rotation operation portion 81 is rotated in one direction, the corresponding clamp bolt 16 is raised, and if the rotation operation portion 81 is rotated in the other direction, the corresponding clamp bolt 16 is lowered.

[0034] As described above, the inductive coupling device according to the first embodiment is configured to fix the inductive coupling device to the power line by sandwiching the power line 13 by the clamp mechanism 4, so that the inductive coupling device is wind and rain, etc. There is no effect of disconnection of the communication line due to the movement of the inductive coupling device caused by wind or the like that does not cause a positional shift with respect to the power line 13 even if it is exposed to

Further, since the gap distance of the core is determined by the thickness of the predetermined gap length regulating member 3, the gap distance can be made highly accurate. Even when the core driving bolt 8 is strongly tightened at the time of installation of the apparatus, the predetermined gap length regulating member 3 is not subjected to a force greater than the elastic force of the upper core pressing panel 5, so the predetermined gap length regulating member 3 However, there is no problem that the accuracy of the gap interval is lowered due to plastic deformation.

[0036] The inductance L in the gap core is given by the following equation:

L = μ O X S / (La / μ, + g),

Where S is the cross-sectional area of the core, g: gap interval, μ 0: vacuum permeability, I: power line current, Β: core flux density, La: gap core magnetic path length, μ ′: core Relative permeability.

As is clear from this equation, in the present invention, the gap interval g can be made highly accurate, so that the value of the inductance L can be made highly accurate. The inductance of the core is an important circuit constant for inductive coupling circuits. As a result of improving the accuracy, the signal strength that can be transmitted on the power line is stabilized, and the information transmission is stable. Then, there is an effect. [0038] The core driving bolt 8 and the clamping bolt 16 are provided at the same angle on the same side of the coupler main body insulator 9 at the same angle, and the same angle with respect to the support rod for installation on the overhead wire each time. In addition, the operability has been improved, for example, when the inductive coupling device is lifted up to the overhead wire and hooked onto the overhead wire, and when the two cores are brought into close contact with each other and the core can be fixed with a single bolt. It is effective.

[0039] Further, if the first core element portion and the second core element portion are relatively translated by the core translation mechanism 1478 in the direction in which the gap length is changed, the core translation is performed. The mechanism 1478 can be realized by, for example, one support plate 14, one core drive bolt 8, and one positioning pin 7, as described above, and has stable and good inductive coupling efficiency, high !, and reliability. In addition to ensuring, it can be realized at low cost.

[0040] In addition, the magnetic cores 1 and 2 are configured to be in a non-contact state with the power line 13 while the clamp mechanism 4 sandwiches the power line 13 on both sides of the magnetic core in the power line extending direction. The collision between the power line 13 and the magnetic cores 1 and 2 due to the vibration or vibration of the overhead power line is avoided, and the coupling accuracy of the inductive coupling device can be improved, the coupling accuracy can be stabilized, and the reliability can be improved.

[0041] As illustrated in Fig. 3, the side surface of the lower core 2 is such that the inner side surface 21iss is arcuate (see Fig. 3 (a)) and the outer side surface 21oss is trapezoidal (Fig. 3). (See (a)).

By making the lower core 2 trapezoidal, the linear surface 21SL1 can be brought into contact with the fixed surface 21SL11 so that the lower core 2 can be positioned, so that the processing accuracy of the core gap surfaces gsa and gsb can be ensured. It becomes easy to secure the accuracy of the attachment position to the coupler main body insulator 9 and the accuracy of the gap surface position of the core. The upper core 1 is also configured in the same manner as the lower core 2, and the linear surface 21SL1 abuts on the fixed surface 21SL11 so that the upper core 1 can be positioned. Therefore, it is easy to secure the processing accuracy of gsb.

[0042] In other words, the inductive coupling device 100 has a first conductor 13 on one side of two parallel straight sides sdl, sd2 as illustrated in FIGS. A trapezoidal first core element portion 1 having a first recess r csl passing therethrough, and two parallel straight sides sdl parallel to the parallel two sides sdl and sd2 of the first core element portion 1 , sd2 has a second recess rcs2 facing the first recess rcsl on the side of the first core element portion 1 side, and the second recess rcs2 A gap g having a substantially uniform gap length is formed over the entire area between the linear side having the first side and the linear side having the first recess res 1 of the first core element portion 1. The trapezoidal second core element part 2 and the second recess rcs2 of the second core element part 2 pass through the first core element part 1 and the second core element part 2 The second conductor 12 is electromagnetically coupled to the first conductor 13.

[0043] In the first embodiment, the trapezoidal first core element part 1 and the second core element part 2 both have the side sdl as the lower base side in the trapezoid, The case where the side sd2 is the side of the upper base in the trapezoid is illustrated. In other words, the trapezoidal first core element part 1 is provided with a first recess rcsl in the lower base side sdl, and the trapezoidal second core element part 2 is provided in the lower base side sdl. The case where two recesses rcs2 are provided is illustrated. With such a structure, the inductive coupling device 100 becomes smaller and lighter than when the recess rcsl or rcs2 is provided in the upper base side sd2.

[0044] In the first embodiment, when the gear surface gsa of the second core element portion 2 or the first core element portion 1 is cut and polished, the force acting on the gap surface gsa by the processing As shown in Fig. 3 (a), WF A is received by the linear bearing surface 21SL11 that receives the linear surface 21SL1 of the linear side sd2 of the core element portion 2 (or 1). (Or 1) is fixed on the bearing surface 21SL11 via the linear surface 21SL1 of the straight side sd2 without moving by the force WFA acting on the gap surface gsa during machining, so the gap surface gsa is cut Machining 'Polishing is performed precisely, and as a result of machining' polishing ', the gap surface gsa is machined to the desired flatness and is not tilted with respect to the ideal (desired) machining surface. It is processed accurately at the position (level in the gap length direction).

[0045] Similarly, the core element part 2 (or 1) does not move due to the force WFB acting on the gap surface gsb during machining, and the linear surface of the straight side sd2 on the bearing surface 21SL11 on the work table. 21 is fixed via SL1, and therefore the cutting process of the gap surface gsb is performed precisely, and as a result of the cutting process, the gap surface gsb is processed to the desired flatness and is ideal. It is precisely machined to the desired position (the desired level in the gap length direction) without tilting with respect to the (desired) machining surface. As a result, the stability and improvement of coupling efficiency, which is one of the product qualities of individual products (inductive coupling devices), can be fully expected as shown in Fig. 1 and Fig. 2. In the assembled state, the gap g between the first core element portion 1 and the second core element portion 2 has a substantially uniform gap length over the entire gap surfaces gsa and gsb.

[0046] Note that if the bearing surfaces 21SL21, 21SL31 for receiving the linear surfaces 21SL2, 21SL3 of the sides sd3, sd4 connected to both ends of the linear side sd2 are provided on the force platform, the gap surface gsa, Even when gsb is applied with force WFAL, WFBL, WFAR, WFBR, etc. acting in the direction perpendicular to the gap length as the force acting on the gap surfaces gsa, gsb, the core element Part 2 (or 1) is fixed on the bearing surface 21SL11, 21SL21, 21SL31 on the work table via the linear surfaces sd2, sd3, sd4 and 21SL1, 21SL2, 21SL3. The gap surfaces gsa and gsb are precisely cut and polished, and as a result of the cutting and polishing process, the gap surfaces gsa and gsb are processed to the desired flatness. It is accurately added to the intended position (the desired level in the gap length direction) without inclining with respect to the surface, and the machining work becomes easy.

[0047] Further, the corner 21 of the outer surface forming the trapezoid of the core element part 2 (or 1) is rounded 21R. That is, the arc-shaped connecting portion 21R is formed. (See Figure 3 (a) (c)). The arc-shaped connecting portion 21R, which is a corner portion having the roundness 21R, is the corner portion of the connecting portion between the straight side sd2 of the upper base of the trapezoid and the connecting sides sd3 and sd4 at both ends thereof, and the angle α In both cases, by setting the angle to 180 degrees and α to 90 degrees, the lower core 2 is jointed with the round 21R after casting of the coupler main body 9 (the lower core 2 is made of an insulating mold material). The internal distortion generated in the coupler main body insulator 9 and the lower core 2 in accordance with the thermal contraction of the insulating mold material of the coupler main body insulator 9 after molding) is reduced. 9 prevents the occurrence of peeling and cracking at the joint with the lower core 2.

[0048] By providing roundness 21R at the corners of the trapezoidal outer surface 21oss (by forming the arc-shaped connecting portion 21R), the lower core 2 is formed when the coupler main body insulator 9 is formed. Is integrally formed in the coupler main body insulator 9, the coupler main body insulator 9 and the coupler main body insulator 9 and the coupler main body insulator 9 after heat shrinkage after casting. Internal strain generated in the lower core 2 can be reduced, and peeling of the joint portion of the coupler main body insulator portion 9 with the lower core 2 and generation of cracks can be prevented.

[0049] The secondary winding 12 is integrated with the secondary winding 12 as shown in Figs. The outer lead-out conductor 1002 is led out to the outside through the insulating molding material of the coupler main body insulator 9.

[0050] It should be noted that the straight surfaces 21SL2 and 21SL3 are connected to ends opposite to the straight surfaces 21SL1 and extend substantially perpendicular to the straight surfaces 21SL1 to the gap surfaces gsa and gsb. Existing linear surfaces 21SL2E and 21SL3E are formed.

[0051] The first conductor 13 and the second conductor 12 are also used as a signal transmission medium. In this case, the first core element portion 1 and the second core element portion 2 are used. The signal is transmitted across the first conductor 13 and the second conductor 12 via the first conductor 13, and the current flowing through the first conductor 13 is used for current measurement via the second conductor 12. Also used when extracting signals.

[0052] Embodiment 2.

In the first embodiment described above, when the first core element portion 1 and the second core element portion 2 are formed of a flight, as the size increases, manufacturing variation (characteristic becomes more stable as the size increases). In the second embodiment, as illustrated in FIG. 4, the first core element portion 1 and the force of increasing the problem of magnetic property degradation and large cracks are likely to occur. The second core element part 2 is laminated and bonded to a plurality of layers to form a laminated core, thereby suppressing the manufacturing variation (the characteristic becomes unstable as the size increases, and the magnetic characteristics are likely to deteriorate and large cracks are likely to occur). Thus, a stable coupling efficiency is obtained. The stacking direction is the extending direction of the power line 13, and the thickness of the first core element part 1 and the second core element part 2 in the extending direction of the power line 13 is adjusted by adjusting the number of stacks. It is also possible to adjust the length arbitrarily.

[0053] The gap surfaces gsa and gsb are polished lj and polished after the first core element portion 1 and the second core element portion 2 are laminated in a plurality of layers and bonded to form a laminated core. Done. When the gap surfaces gsa and gsb are polished 1 after polishing and laminated to a plurality of layers to form a laminated core, the gap surfaces gsa and gsb are polished and polished and then laminated and bonded to multiple layers. Compared with the case of using a laminated core, the flatness of the gap surfaces gsa and gsb is improved, and a stable coupling efficiency can be obtained.

[0054] Embodiment 3. In Embodiment 3, the straight surfaces 21SL2E and 21SL3E of the lower core 2 in FIG. 3 are omitted, and the straight surfaces 21SL2 and 21SL3 extend to the gap surfaces gsa and gsb as shown in FIG. Thus, the step of forming the straight surfaces 21SL2E and 21SL3E can be omitted.

[0055] Embodiment 4.

In the example shown in FIG. 2 described above, the lower core 2 is integrally molded directly in the coupler main body insulator 9 when the coupler main body insulator 9 is formed. As shown in FIG. 6, a shock absorbing material 29 such as rubber is interposed between the coupler main body insulator 9 and the lower core 2. Due to the interposition of the cushioning material 29, the inner portion generated in the coupler main body insulator 9 and the lower core 2 due to the thermal contraction of the coupler main body insulator 9 after casting of the coupler main body insulator 9 Strain can be reduced, and peeling of the joint portion of the coupler main body insulator portion 9 with the lower core 2 and generation of cracks can be prevented.

[0056] Embodiment 5.

In the first to third embodiments described above, the core element portion 2 (or 1) has a trapezoidal shape, but in the fifth embodiment, the core element portion 2 (or 1) is rectangular as shown in FIG. This is an example.

[0057] Embodiment 6.

In the fifth embodiment described above, a force exemplifying a case where the core element part 2 (or 1) is square is illustrated. In the sixth embodiment, the square core element part 2 (or 1) is This is an example in which the corner was removed.

Note that, in each of the above-described FIGS. 1 to 9, the same reference numerals indicate the same or corresponding parts.

Brief Description of Drawings

FIG. 1 is a diagram showing a first embodiment of the present invention, a front view showing an example of the structure of the entire inductive coupling device, and a diagram seen from the left side of FIG. 2.

FIG. 2 is a view showing the first embodiment of the present invention, and is a longitudinal left side view showing a partial cross section of the Π-II line force of FIG. 1 as seen in the direction of the arrow; FIG. 6 is a longitudinal left side view of the element part and the second core element part in a state where the gap length is close to a state where the gap length becomes a predetermined gap length.

FIG. 3 is a diagram showing the first embodiment of the present invention and is an enlarged view of a core element portion; (a) Is a side view, (b) is a plan view, and (c) is a front view corresponding to FIG.

FIG. 4 is a diagram showing a second embodiment of the present invention, and is an enlarged view of a core element part, (a) is a side view, (b) is a plan view, and (c) corresponds to FIG. FIG.

FIG. 5 is a diagram showing a third embodiment of the present invention, and is an enlarged view of a core element part, (a) is a side view, (b) is a plan view, and (c) corresponds to FIG. FIG.

FIG. 6 is a diagram showing a fourth embodiment of the present invention, and is a longitudinal left side view showing another example corresponding to FIG.

FIG. 7 is a diagram showing the fifth embodiment of the present invention, and is an enlarged view of the core element portion. (A) is a side view, (b) is a plan view, and (c) corresponds to FIG. FIG.

FIG. 8 is a diagram showing the sixth embodiment of the present invention, and is an enlarged view of the core element part. (A) is a side view, (b) is a plan view, and (c) corresponds to FIG. FIG.

FIG. 9 is an enlarged view showing a core element part in a conventional inductive coupling device, (a) is a side view, (b) is a plan view, and (c) is a front view corresponding to FIG.

Explanation of symbols

1 First core element (upper core),

2 Second core element (lower core),

21iss inner surface,

21oss outer side,

21R roundness,

21SL1 straight surface,

21SL11 Linear bearing surface,

21SL2 straight surface,

21SL2E straight surface,

21SL21 Linear bearing surface,

21SL3 linear surface,

21SL3E Straight surface,

21SL31 Linear bearing surface,

3 Predetermined gap length regulating member, Clamping mechanism,

Elastic member (upper core pressing panel), position adjustment screw,

Positioning pin,

Bolt (core drive bolt), inductive coupling device body,

Positioning member (power line retainer), core case,

Secondary winding (second conductor), power line (first conductor),

Support plate,

Positioning pin holding panel, clamping bolt,

Clamp spacer,

Nuts,

Bolt,

Cushioning material,

Clamp arm,

Hollow,

Rotation operation part,

The first arm,

The second arm,

The third arm,

Combiner,

Hardened binder,

Magnetic core,

Roughly long hole,

Through hole, 146 Position adjustment mechanism,

147 positioning mechanism,

161 Rotation operation part,

1002 Outer conductor,

1145 core holding mechanism,

1478 Core translation mechanism,

g gap,

ib current return current,

if current forward current,

rcsl first recess,

rcs2 second recess,

sdl One of the two parallel sides, sd2 The other side of the two parallel sides, sd3 One side connected to the parallel side, sd4 The other side connected to the parallel side.

Claims

The scope of the claims

[1] A trapezoidal first core element portion having a first recess through which the first conductor penetrates in one of two parallel sides, parallel to the two parallel sides of the first core element portion Of the two parallel sides forming the first core element portion side, the second concave portion facing the first concave portion, and the side having the second concave portion and the first core element A trapezoidal second core element part in which a gap is formed between the first concave part and the side having the first concave part, and the second concave part of the second core element part passes through the second concave part. An inductive coupling device including a second conductor that is electromagnetically coupled to the first conductor via a core element portion and the second core element portion.

[2] In the inductive coupling device according to claim 1, the first conductor and the second conductor are signal transmission media, and the first core element portion and the second core An inductive coupling device characterized in that the signal is transmitted across the first conductor and the second conductor via an element part.

[3] The inductive coupling device according to claim 1 or 2, wherein at least one of the first core element portion and the second core element portion is a laminated core. .

[4] The inductive coupling device according to claim 1, wherein a bottom portion of the second core element portion opposite to the first core element portion is molded with an insulating molding material, and the second conductor is An inductive coupling device, wherein the inductive coupling device is led out through an insulating mold material.

[5] The inductive coupling device according to claim 4, wherein the bottom portion of the second core element portion molded by the insulating mold material and both sides of the bottom portion are connected by an arc-shaped connecting portion. An inductive coupling device.

[6] In the inductive coupling device according to claim 4 or claim 5, a buffer material that absorbs strain of the insulating mold material is interposed between the second core element portion and the insulating mold material! An inductive coupling device characterized by being beaten.