JP2005057309A - Coil structure and alpha helical coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a coil structure that allows realizing electronic parts properly operable in a high frequency band and to obtain an alpha helical coil. <P>SOLUTION: The coil structure has: an alpha helical coil made up of one winding 4 having a pair of spiral coils 4a, 4b opposite to each other, the winding direction of each winding of the spiral coils directing parallel to the surface of said foil and the innermost windings of respective said pair of spiral coils being connected to each other; and a subsidiary coil 6 provided between said pair of spiral coils of said alpha helical coil; wherein the connection wiring between said pair of spiral coils 4a, 4b is inside the spiral coil of said subsidiary coil 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a coil structure used for electrical and electronic components, and an alpha coil.

  2. Description of the Related Art Conventionally, there is a need for a technique for reducing the height dimension of electrical and electronic components in order to reduce the size of an apparatus. Among these technologies, especially for miniaturizing electrical and electronic components that use coils, copper foil is bonded to an epoxy substrate or a film with excellent heat resistance, and a coil pattern is drawn on the copper foil to eliminate unnecessary parts. There is a substrate coil that produces a coil by etching.

  Further, as another technique for reducing the size of a coil, an apparatus for manufacturing an alpha-fired edgewise coil using a rectangular wire as disclosed in Japanese Patent No. 2892225 is disclosed. In this method, an alpha coil having two spiral portions facing each other is manufactured, and a coil with a reduced height can be obtained by using a rectangular wire as the winding.

FIG. 37 schematically shows the configuration of the above-described alpha-fired edgewise coil manufacturing apparatus. As shown in the drawing, the alpha-edged edgewise coil manufacturing apparatus includes two sandwiching members 101 and 102 having mutually facing surfaces, and a removable plate-like winding provided between the two sandwiching members. A member 103, a sandwiching member 101, 102, and a winding shaft 104 penetrating the winding member 103 are provided, and the winding is wound in a space between the one sandwiching member 101 and the winding member 103. Thus, one spiral portion is formed, and the other spiral portion is formed by winding the remaining winding in the space between the other pinching member 102 and the winding member 103.
Japanese Patent No. 28922225

  In recent years, coils for electronic components particularly for high frequency bands have been required to be further downsized.

  However, in the conventional substrate coil, the thickness of the substrate and the film is thicker than necessary for production and necessary for insulation, so that the space factor of the conductor in the device is deteriorated and the size is reduced. It was an obstacle. Further, since etching is required to form a copper pattern to be a coil on the substrate, there is a problem that a copper etching waste liquid is generated, and its processing cost and energy are required.

  On the other hand, the above-described alpha wire edgewise coil using a rectangular wire does not require an etching process, and thus has an advantage that it can be produced at low cost and safely. However, the conventional alpha wire edgewise coil shown in FIG. In order to form two opposing spiral portions, the manufacturing apparatus inserts a plate-like winding member 103 between the opposing surfaces of the two sandwiching members. At this time, in order to secure a space in which the spiral portion is formed, the facing surfaces of the pinching members 101 and 102 and the surface of the winding member 103 are parallel to each other and orthogonal to the winding shaft 104. There is a need.

  However, when a foil wire such as a metal foil, which is expected to be used in a high frequency band, is used as a winding, the space formed between the sandwiching members 101 and 102 and the winding member 103 is reduced, and It is necessary to reduce the thickness of the winding member 103 itself. At this time, the space in which the spiral portion is formed is the width of the thickness of the winding, and the winding member 103 must be fixed to the winding shaft 104 so as to maintain this width. Furthermore, since the fixed part of the winding member 103 and the winding shaft 104 takes a large area of the spiral portion to be formed, it cannot take a very large area.

  Therefore, when the winding is a foil wire, the winding member 103 cannot be sufficiently fixed to the winding shaft 104, or the winding member 103 itself is deformed. It becomes difficult to secure a right angle to 104. As a result, it is difficult to obtain a space for forming the spiral portion, and there is a problem that a coil cannot be created.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide an alpha winding coil or the like that can realize an electronic component that operates well in a high frequency band. It is another object of the present invention to provide an alpha-winding coil manufacturing method and manufacturing apparatus that can be used in a high-frequency band and that can produce a low-profile alpha-wound edgewise coil.

  In order to achieve the above object, the first aspect of the present invention is constituted by a single winding having a pair of opposed spiral portions, and the winding direction of the winding in the spiral portion is the surface direction of the foil. And an auxiliary coil provided between the pair of spiral portions of the alpha coil, and an alpha coil that is connected to the innermost peripheral portions of each of the pair of spiral portions. The connection part of a pair of spiral part is a coil structure inside the spiral part of the said subcoil.

  According to a second aspect of the present invention, the sub-coil is composed of a single winding having a pair of opposed spiral portions, and the winding direction of the winding in the spiral portion is parallel to the surface direction of the foil. The coil structure according to claim 1, which is an alpha coil in which innermost peripheral portions of the pair of spiral portions are connected to each other.

The third aspect of the present invention includes a plurality of alpha winding coils having a pair of opposed spiral portions,
The innermost peripheral portions of the pair of spiral portions of the alpha coil are connected to each other,
Each said alpha winding coil has connected each outermost peripheral parts,
Each said alpha winding coil is a coil structure formed from one common coil | winding.

  In addition, a fourth aspect of the present invention is the coil structure according to any one of the first to third aspects, wherein the winding has a foil-like configuration having a skin effect.

  The fifth aspect of the present invention is the coil structure according to any one of the first to third aspects of the present invention, wherein a wire covered with a three-layer insulating structure is used as the winding.

Further, the sixth aspect of the present invention includes a single winding having a pair of opposed spiral portions,
A low dielectric constant member having a through hole provided between the pair of spiral portions;
Each of the innermost peripheral portions of the pair of spiral portions of the single winding is an alpha coil that is connected through the through hole.

The seventh aspect of the present invention includes a single winding having a pair of opposed spiral portions,
A high dielectric constant member having a through hole provided between the pair of spiral portions;
Each of the innermost peripheral portions of the pair of spiral portions of the single winding is an alpha coil that is connected through the through hole.

  The eighth aspect of the present invention is the alpha winding coil according to the sixth or seventh aspect of the present invention, wherein the winding has a foil-like configuration having a skin effect.

  The ninth aspect of the present invention is the alpha-winding coil according to the sixth or seventh aspect of the present invention, wherein a wire covered with a three-layer insulating structure is used as the winding.

  As is apparent from the above description, according to the present invention, it is possible to obtain a coil structure and an alpha-winding coil that reduce the height dimension of electrical and electronic components that operate in a high frequency band.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In addition, after describing embodiment of the alpha winding coil of this invention manufactured by the manufacturing method of the alpha winding coil of this invention, the manufacturing method of this alpha winding coil is demonstrated.

(Embodiment 1)
FIG. 1 is an overall perspective view showing one unit of an alpha winding edgewise coil according to Embodiment 1 of the present invention.

  In FIG. 1, a main winding 1 is a single metal foil conductor having two spiral portions 1a and 1b. The main winding 1 is insulated. Only the main winding 1 constitutes one unit of the winding coil. The rotational axes of the spiral portions 1a and 1b are substantially the same, and the innermost peripheral portions of the spiral portions 1a and 1b are connected by a coil crossover portion 1c. However, although the length of the coil crossover portion 1c is exaggerated for the sake of explanation, the substantial length is equal to the sum of the thickness of the spiral portion 1a and the thickness of the spiral portion 1b. Therefore, the thickness of one unit of the coil is also substantially equal to the sum of the thickness of the spiral portion 1a and the thickness of the spiral portion 1b.

  When a plurality of units of this coil are connected in series, the ends 1d and 1e of each winding are connected in series with the ends of the other unit winding.

  In the coil with such a configuration, in the alpha-wound edgewise coil, the winding is made of a metal foil-like conductor, so that in addition to the conventional effect of reducing the height, the effect of sufficiently functioning in the high-frequency band can be obtained. .

In the above embodiment, the winding is a metal foil wire. However, the definition of the foil wire may be any thickness as long as the foil wire has a skin effect, and is determined by a specific numerical value or the like of the thickness. It is not something that can be done. However, in order to fully exhibit the skin effect, the thickness is desirably determined by the frequency of the current flowing through the winding and the damping constant of the metal used for the foil. Taking copper as an example, the attenuation coefficient c of copper is
c = 15.1 × f ^1/2
It is represented by Here, f is the frequency of the current.

Defining the reciprocal of the damping constant c as half the foil thickness d,
(Equation 2)
d = 0.0662 ÷ f ^1/2
For example, a sufficient skin effect with respect to a frequency of 100 KHz is obtained when the foil thickness is 0.418 mm. Further, for 50 kHz, it is 0.58 mm.

  Further, the foil of the present invention is not defined by the shape of the cross section, and may be rectangular or elliptical. Moreover, in the said embodiment, although the main winding 1 was made into the spiral shape, it is not restricted to this, It is good also as a square spiral shape.

(Embodiment 2)
FIG. 2 is an overall perspective view showing one unit of an alpha winding edgewise coil according to Embodiment 2 of the present invention. The present embodiment is similar to the first embodiment in that it has the spiral portions 1a and 1b and the coil transition portion 1c, but the main winding 2 is composed of the first winding 2a and the second winding 2b. Are different from each other in that the surfaces are joined together to form a single winding. In addition, the alpha winding edgewise coil of the present embodiment has the alpha winding edgewise coil of the first embodiment in which the first winding 2a is the main winding and the second winding 2b is the main winding. The alpha winding edgewise coil of the first embodiment can be regarded as a configuration in which the surfaces of the windings are stacked on each other.

  Since the present embodiment has the above-described configuration, the skin effect of the winding can be further enhanced, and an excellent coil can be obtained in the operation in the high frequency band.

  Also, when a coil structure in which the present embodiment is laminated in three layers is used for a transformer, when the central coil is the input side, and the remaining two coils sandwiching the central coil are the output side, The best transformer can be obtained by bonding between PS. However, the best coupling here means that energy transfer from the input side to the output side is likely to occur and efficiency is high.

  Moreover, in the said embodiment, although the main winding 2 was made into the metal foil wire, the structure which laminated | stacked the flat wire on the surface may be sufficient as long as this invention is a covered metal winding. Furthermore, it is good also as a structure which laminated | stacked the round wire. Needless to say, the number of windings to be stacked may be three or more.

(Embodiment 3)
FIG. 3 is an overall perspective view showing one unit of the alpha winding edgewise coil according to Embodiment 2 of the present invention.

  In FIG. 3, a main winding 3 is a single metal foil-like conductor having four spiral portions 3a, 3b, 3c and 3d, and is subjected to an insulation coating process. Only the main winding 3 constitutes one unit of the winding coil. The rotation axes of the spiral portions 3a to 3b are substantially the same, the innermost peripheral portions of the spiral portions 3a and 3b are connected by a coil crossover portion 3e, and the innermost peripheral portions of the spiral portions 3c and 3d are coil crossovers. The outermost peripheral edges of the spiral portions 3b, 3c are connected by a coil crossover portion 3f. That is, the coil of this embodiment has a pair of spiral portions as a set, and two sets are connected to each other at the outermost peripheral portions of the spiral portions.

  However, although the length of each of the coil crossover portions 3e to 3g is shown exaggeratedly large for the purpose of explanation, the length of the coil crossover portion 3e is the thickness of the spiral portion 3a and the spiral length. The length of the coil transition portion 3g is equal to the total thickness of the spiral portion 3d and the thickness of the spiral portion 3d, and the length of the coil transition portion 3f is equal to the thickness of the spiral portion 3b and the spiral portion 3d. Equal to the total thickness of Therefore, the thickness of one unit of the coil is also substantially equal to the sum of the thicknesses of the spiral portions 3a to 3d.

  The coil of the present embodiment having such a configuration has the same configuration as that of the plurality of coils of the first embodiment connected in series, but is composed of a single main winding, and has a junction portion. The difference is that it does not have at all. Therefore, there is an advantage that there is no internal loss due to the joint portion.

  In the above embodiment, the main winding 3 is a metal foil wire, but the present invention may be a flat wire, a round wire or the like as long as it is a coated metal winding.

  Moreover, in the said embodiment, a pair of spiral part was made into one set, and two sets shall be connected by the outermost peripheral parts of each spiral part, but as a structure by which three or more sets were connected, Good.

(Embodiment 4)
FIG. 4 is an overall perspective view showing one unit of an alpha winding edgewise coil according to Embodiment 4 of the present invention.

  In FIG. 4, the alpha winding edgewise coil of the present embodiment is composed of a first coil and a second coil, and the configuration of each of the first coil and the second coil is basically as follows. This is the same as the alpha winding edgewise coil of the first embodiment. That is, in the first coil, the main winding 4 is a single metal foil conductor having two spiral portions 4a and 4b. The main winding 4 is insulated. The rotational axes of the spiral portions 4a and 4b are substantially the same, and the innermost peripheral portions of the spiral portions 4a and 4b are connected by a coil crossover portion 4c. The second coil is composed of the main winding 5, and the two spiral portions 5a and 5b have the same configuration as the first coil.

  Furthermore, the coil transition part 4c of the first coil passes through the inner diameter of the spiral parts 5a and 5b of the second coil, and the second coil is connected to the two spiral parts 4a and 4b of the first coil. It has a configuration arranged between them. However, although the length of the coil crossover portion 4c is shown exaggeratedly large for explanation, the substantial length is the thickness of the spiral portion 4a, the thickness of the spiral portion 4b, the thickness of the spiral portion 5a, and the spiral portion. Equal to the total thickness of 5b. Further, the substantial length of the coil crossover portion 5c is equal to the sum of the thickness of the spiral portion 5a and the thickness of the spiral portion 5b. Therefore, the thickness of one unit of the coil is also substantially equal to the sum of the thickness of the spiral portion 4a, the thickness of the spiral portion 4b, the thickness of the spiral portion 5a, and the thickness of the spiral portion 5b.

  In the coil of the present embodiment having such a configuration, when the first coil by the main winding 4 is used as the input side and the second coil by the main winding 5 is used as the output side in the transformer, the P-S The coupling between them has the advantage that the best transformer can be obtained. However, the best coupling here means that energy transfer from the input side to the output side is likely to occur and efficiency is high.

  In the above embodiment, the main windings 4 and 5 are metal foil wires. However, the present invention may be a flat wire, a round wire, or the like as long as it is a coated metal winding.

  In the above embodiment, one second coil is provided between two spiral portions of the first coil. However, the number of second coils is two or more. May be.

  Further, the number of turns of the spiral portion, the direction of winding, the shape of the spiral, the width of the winding, and the thickness of the first coil and the second coil may be different from each other.

(Embodiment 5)
FIG. 5 is an overall perspective view showing one unit of an alpha winding edgewise coil according to the fifth embodiment of the present invention. In this embodiment, in the alpha-wound edgewise coil of the fourth embodiment, the coil provided between the two spiral portions of the first coil is not an alpha-wound edgewise coil equivalent to that of the first embodiment, but a wire The difference is that the auxiliary coil 6 is formed of a rectangular wire with a larger width and has a spiral portion that is three-dimensionally wound in the direction of the rotation axis. When the coil of the present embodiment having such a configuration is used as a down transformer with the first coil as the input side and the sub-coil 6 as the output side, the down transformer with a good coupling between PS is obtained. can get. At this time, it is desirable that the number of turns of the subcoil 6 is reduced at a ratio of the down rate as compared with the first coil on the input side, and the first coil and the second coil are It is more desirable that the inner diameter and the outer diameter are the same as much as possible.

  Moreover, in the said embodiment, although it was set as the structure provided with one subcoil between the two spiral parts of the 1st coil, the number of subcoils may be two or more. In this case, the number of turns of the plurality of lucky coils, the shape of the spiral, the direction of winding, the width and thickness of the winding may be different from each other.

(Embodiment 6)
FIG. 6 is an overall perspective view showing one unit of the alpha winding edgewise coil according to the sixth embodiment of the present invention.

  In FIG. 6, the alpha-winding edgewise coil of the present embodiment is composed of a first coil and an annular dielectric 8 corresponding to the low dielectric constant member of the present invention. Basically, this is the same as the alpha winding edgewise coil of the first embodiment. That is, in the first coil, the main winding 7 is a single metal foil conductor having two spiral portions 7a and 7b. The main winding 7 is subjected to an insulation coating process. The rotational axes of the spiral portions 7a and 7b are substantially the same, and the innermost peripheral portions of the spiral portions 7a and 7b are connected by a coil crossover portion 7c. In addition, the coil transition portion 7c of the first coil passes through the gap 8a of the annular dielectric 8, and the annular dielectric 8 is disposed between the two spiral portions 7a and 7b of the first coil. It has a configuration. However, the length of the coil connecting portion 7c is shown exaggeratedly large for explanation, but the substantial length is the sum of the thickness of the spiral portion 7a, the thickness of the spiral portion 7b, and the thickness of the annular dielectric 8. be equivalent to. Therefore, the thickness of one unit of the coil is also substantially equal to the sum of the thickness of the spiral portion 7a, the thickness of the spiral portion 7b, and the thickness of the annular dielectric body 8.

  In the coil of the present embodiment having such a configuration, the annular dielectric 8 has a low dielectric constant, so that the capacitance value between the opposing spiral portions 7a and 7b can be minimized.

  As the low dielectric constant member of the present invention, polyester, Teflon (registered trademark) or the like may be used. However, a polyester film usually used as an insulating material has a relative dielectric constant of 3.2 (JIS C 2318-) at 1 MHz. It is desirable to use Teflon because Teflon is 2.1 (by the same measurement method as polyester) in all frequency bands.

  Furthermore, air has a relative dielectric constant of 1 at 1 MHz and the lowest dielectric constant. Therefore, as shown in FIG. 7, instead of the annular dielectric 8, an annular dielectric 88 having a gap inside may be used. Since the relative permittivity of the gap portion of the annular dielectric 88 is the relative permittivity of air, there is an effect that a smaller capacitance value can be obtained than when the annular dielectric 8 is used.

  Further, as shown in FIG. 38 (a), the annular dielectric 88 includes two concentric two annular low dielectric constant members 88a and an outer periphery of the annular low dielectric constant member 88b. The regions surrounded by the low dielectric constant members 88a, 88b and 88c are defined as gap portions, but the gap portions are provided between the spiral portions 7a and 7b. What is necessary is not limited by the shape and configuration of the low dielectric constant member. Further, the low dielectric constant member may not be annular.

  In the above embodiment, the main windings 4 and 5 are metal foil wires. However, the present invention may be a flat wire, a round wire, or the like as long as it is a coated metal winding.

  Further, instead of the annular dielectric 8 having a low dielectric constant, an annular dielectric 90 having a high dielectric constant is provided between the spiral portions 7a and 7b, as shown in FIG. 38 (b). Also good. In this case, since the annular dielectric 90 has a large capacitance value, when a circuit using a transformer using this coil is manufactured, it is not necessary to separately provide a capacitor in the circuit, or a low-capacitance capacitor is used. Has the advantage of being able to

  The high dielectric constant member of the present invention preferably has an annular configuration whose size is substantially the same as that of the spiral portions 7a and 7b, as in the annular dielectric 90 of FIG. 38B. As in the C-shaped dielectric 91 in (c), a slit may be provided in part instead of a complete ring. That is, the high dielectric constant member of the present invention is not limited to the shape as long as it is provided between the spiral portions 7a and 7b. In particular, when the shape is not annular, the high dielectric constant member can be inserted between the spiral portions after the coil portion is manufactured, and there is an advantage that the manufacturing process can be simplified.

(Embodiment 7)
Next, the alpha winding edgewise coil manufacturing method of the first to sixth embodiments will be described, and an alpha winding edgewise coil manufacturing apparatus according to an embodiment of the present invention will be described.

  FIG. 8 is a front view of the alpha winding edgewise coil manufacturing apparatus of the present embodiment, and FIG. 9 is a plan view. As shown in the figure, the alpha-winding edgewise coil manufacturing apparatus of the present embodiment has a winding core shaft 11 corresponding to the shaft of the present invention, and firstly penetrated and attached to the winding core shaft 11. The left side wall member 12 corresponding to the first sandwiching member, the spacer 16 corresponding to the support member of the present invention attached to the side core shaft 11 next to the left side wall member 12, and the side core shaft 11 next to the spacer 16. The inner side wall plate 15 corresponding to the winding auxiliary member of the present invention, which is penetrated and attached, and the first pinching member of the present invention, which is attached next to the winding core shaft 11 after the inner side wall plate 15. The right side wall member 15 and the round pin 17 attached through the winding core shaft 11 and the right side wall member 15 from the direction orthogonal to the extending direction of the winding core shaft 11 are provided.

  Further, as shown in FIG. 9, the left side wall member 12 is provided with a wire catch (a) 18 for fixing the wire, and the right side wall member 13 is provided with a line catch (b) 19 for fixing the wire. Yes.

  Next, FIG. 10A is a front view of the winding core shaft 11, and FIG. 10B is a top view. As shown in the figure, a keyway 11 a having a length of about half the length of the winding core shaft 11 is engraved on the surface of the winding core shaft 11, and a circle for penetrating the round pin 17. A pin hole 11b is opened. Although not shown in the figure, the side surface of the winding core shaft 11 is circular. Further, the left end of the winding core shaft 11 can be attached to a driving means (not shown), and is rotated about the extending direction as a rotation axis by driving of the driving means.

  Moreover, Fig.11 (a) is a front view of the left side wall member 12, and FIG.11 (b) is a side view. As shown in the drawing, the left side wall member 12 is composed of two-stage cylinders having different diameters, and the winding core shaft 11 penetrates the surface of the cylindrical part having a large diameter facing the right side wall member 13. The hole 12a is opened, and a spiral guide member 14 is provided around the hole 12a.

  Moreover, Fig.12 (a) is a front view of the right side wall member 13, and FIG.12 (b) is a side view. As shown in the figure, the right side wall member 13 is composed of two-stage cylinders having different diameters, like the left side wall member 12, and on the surface facing the left side wall member 12 of the cylindrical part having a large diameter, A hole 13a through which the winding core shaft 11 passes is opened, and a spiral guide member 14 is provided around the hole 12a, like the left side wall member 11. Furthermore, a circular pin hole 13b for penetrating the circular pin 17 is provided in the cylindrical portion having a small diameter so as to reach the hole 13a from the surface of the right side wall member 13.

  Moreover, Fig.13 (a) is a front view of the intermediate wall board 15, FIG.13 (b) is a side view. As shown in the figure, the middle wall plate 15 has a disk shape having an area substantially the same as or larger than the spiral portion of the coil, and a hole through which the winding core shaft 11 passes in the center. The slit 15b for allowing a wire to pass through is provided from the outer periphery to the hole 15a. Further, as shown in FIG. 13B, the slit 15 b is cut in a direction that is asymmetric with respect to the direction of the winding core axis when viewed from the side surface of the intermediate wall plate 15. Further, a convex portion 15 c is provided around the hole 15 a, and this convex portion 15 c corresponds to the key groove 11 a of the winding shaft 11.

  Here, as shown in FIG. 16A, the spiral guide member 14 has an inner circumference 14a having a length corresponding to a half circumference of the hole 12a, the hole 13a, or the hole 15a. The difference from the circumference 14b is the maximum width w of one end, and the width decreases along a curve corresponding to the circumference of the hole, and the width of the other end is substantially zero. . Here, the maximum width w is set to be equal to or larger than the width of the wire. Further, as shown in FIGS. 11 (b) and 12 (b), the thickness is made slightly thicker than the thickness of the wire.

  Next, FIG. 14A is a front view of the spacer 16, and FIG. 14B is a side view. As shown in the figure, the spacer 16 is provided with a wide slit 16a from the center to the outer periphery, and the width W of the slit 16a is equal to the diameter of the winding core shaft 11 and the width of the spiral guide member 14. Is substantially the same as or greater than

  Further, FIG. 15 (a) is a front view of the round pin 17, and FIG. 15 (b) is a side view. As shown in the figure, the round pin 17 has a two-stage cylindrical shape, and a portion having a small diameter is fitted into the round pin holes 11b and 13b.

  An alpha winding edge coil manufacturing method using the alpha winding edge coil manufacturing apparatus having the above-described configuration will be described below.

  First, as shown in FIG. 17, one end of the winding core shaft 11 is attached and fixed to the rotary drive shaft 20 of the drive means (not shown). The winding core shaft 11 may be fixed by screwing with a fixing screw 21 as shown in the figure, or may be by another means such as a chuck.

  Next, as shown in FIG. 18, the left side wall member 12 is attached to the winding core shaft 11 through the hole 12a and fixed with screws 12b. Further, the middle wall plate 15 is attached to the winding core shaft 11 through the hole 15a. At this time, the convex portion 15 c of the inner side wall plate 15 is fitted into the key groove 11 a of the winding core shaft 11. At this time, the middle wall plate 15 is supported by the spiral guide member 14 provided on the left side wall member 14.

  Next, the wire material used as the coil | winding of a coil is mounted | worn with the inner wall board 15. As shown in FIG. 19 (a), the wire rod 30 is mounted in such a direction that it passes through the slit 15b, contacts the outer periphery of the hole 15a, and is orthogonal to the slit 15b. Further, as shown in FIGS. 19B and 19C, the foil wire is bent obliquely along the direction of the slit 15b and reaches from one main surface of the middle wall plate 15 to the other main surface. . Note that the wire 30 may be attached to the inner wall plate 15 before the inner wall plate 15 is attached to the winding core shaft 11.

  Further, the angle and position of the slit 15b on the main surface of the inner wall plate 15 and the angle with respect to the thickness direction are not limited to the above description, and may be arbitrarily determined. In the case of following the above description, in the alpha-wound edgewise coil to be created, the lead wire that is the end of the winding on one side and the end of the winding on the other side of the pair of spiral portions The lead wires are parallel to each other. However, when the angle formed by each lead wire is not parallel (180 °) but an arbitrary angle such as 90 °, the angle on the main surface of the inner wall plate 15 of the slit 15b is different (the slit 15 is different from the slit 15b). The wire 30 is not orthogonal).

  In addition, in the alpha-wound edgewise coil to be created, if the pair of spiral portions is not symmetrical with respect to the coil transition portion, the middle wall plate depends on where the position of the transition wire that becomes the coil transition portion is determined. The angle and position of the slit reaching the center hole of the is determined. Furthermore, the angle with respect to the thickness is determined by the ease of bending depending on the thickness of the wire used. The space dimension of the slit 15b is set to be larger than at least the thickness of the wire 30.

  Next, as shown in the front view of FIG. 20 (a) and the top view of FIG. 20 (b), in the state where the inner wall plate 15 into which the wire 30 is inserted is attached to the winding core shaft 11, Of one end, half of the wire length required for one coil is stocked as a line segment 30a, and a portion that becomes a boundary between the wire 30a and the line segment 30 is fixed by a wire catch (a) 18. At this time, the wire catch (a) 18 fixes the wire rod by applying pressure to the entire main surface. Since this wire catching method has a large area to be tightened, even if the wire is a thin foil, it is not cut or scratched.

  By the way, the thickness of the inner side wall plate 15 is the length of the coil connecting portion between the one spiral portion and the other spiral portion of the rolled-up coil, and is the space height of the coil. In the case of obtaining the coil as in the first embodiment, it is preferable that the length of the coil connecting portion is short. Therefore, the inner wall plate 15 needs to be made as thin as possible.

  At this time, as described in the prior art, due to mechanical accuracy of the intermediate wall plate 15 and instability of the fixing portion between the intermediate wall plate 15 and the winding core shaft 11, It becomes difficult to ensure a right angle with respect to the winding core shaft 11 of the side wall plate 15. In particular, the middle side wall 15 is supported by being sandwiched between two spiral guide members 14 having a slight surface area provided on the left side wall member 12 and the right side wall member 13, respectively. 11 is a cause of deflection of the rotating surface of the inner wall plate 15.

  If the wire 30 having a thickness of 50 μm is to be rolled n times, the space formed between the opposing surfaces of the left and right side wall members and the middle wall plate 15 must be guaranteed to have a thickness of 50 μm over the entire circumference. If 15 is deflected at the time of rotation, this space is not guaranteed, and even if one spiral part can be created, there is no necessary space when creating the other spiral part, When the space is too large, the wound wire rods overlap each other, and an accurate edgewise spiral portion cannot be formed.

  In the present embodiment, in order to prevent the above problems, the spacer 16 is placed between the left side wall member 12 and the left side surface of the middle side wall plate 15 before the right side wall member 13 is attached to the winding core shaft 11. insert. As shown in FIG. 14, the spacer 16 is provided with a slit 16 a having a width W that is substantially equal to or greater than the sum of the diameter of the winding core shaft 11 and the maximum width w of the spiral guide member 14. The left side wall member 12 and the middle side wall plate 15 can be inserted into the winding core shaft 11 even after being mounted on the winding core shaft 11. Here, FIG. 21 shows a positional relationship among the spacer 16, the intermediate wall plate 15, and the wire rod 30.

  By inserting the spacer 16, the middle wall plate 15 is not supported only by the main surface of the spiral guide member 16 attached to the right side of the left side wall, but the main surface of the spiral guide member 16 and the main surface of the spacer 16. And is supported by. The spacer 16 may be inserted before the inner wall plate 15 is attached to the winding core shaft 11.

  Next, the right side wall member 13 is mounted through the core core 11 in the hole 13a. Next, the round pin hole 11b and the hole 13b of the winding core shaft 11 are aligned, and the round pin 17 is inserted therein to fix the winding core shaft 11 and the right side wall member 13. The front view of FIG. 22A and the side view of FIG. 22B show a state in which the above operations are completed. A spiral guide member 14 is also provided on the surface of the right side wall member 13 facing the left side wall member 12, and the middle side wall plate 15 has one main surface thereof and the spiral guide member 14 of the left side wall member 12. The other main surface is supported by the spiral guide member 14 of the right side wall member 13.

  Next, the wire rod 30 is supplied to the space between the right side wall member 13 and the middle side wall plate 15 while applying a slight tension while rotating the rotary drive shaft 20 by a rotational power means (not shown). Then, the edge of the wire 30 is wound around the winding core shaft 11, and a coil spiral portion is formed in a direction orthogonal to the rotation axis of the winding core shaft 11.

  At this time, since the right side wall member 13 and the left side wall member 12 are fixed to the winding core shaft 11 by screws 12b and round pins 17, respectively, the right side wall member 13 and the left side wall member 12 rotate in conjunction with the winding core shaft 11. Are fitted in the keyway 11a, and rotate in conjunction with the winding core shaft 11 without spinning around the winding core shaft 11. Further, since both main surfaces of the spacer 16 are sandwiched between the right side wall member 12 and the middle side wall plate 15, the spacer 16 rotates in conjunction with the winding core shaft 11 without spinning around the winding core shaft 11. .

  The spiral part formed by the winding operation corresponds to the spiral part 1a in the case of the alpha-winding edgewise coil of the first embodiment. The wire 30b during this winding process is shown in FIG.

  Here, the spiral guide member 14 is configured such that when the wire 30 finishes winding the winding core shaft 11 once and starts the next winding, the edge of the newly wound wire becomes the wire wound around the first turn. It has a role of preventing stress from being received from a corner portion that becomes a coil crossover portion.

  When such winding is performed without using the spiral guide member 14, as shown in FIGS. 24 (a) and 24 (b), the newly wound wire is the winding start of the already wound wire. A large stress is received from the corner 30, that is, the shoulder 30 c at the bending angle of the wire serving as the transition part of the coil. Due to this stress, the insulating coating of the wire in contact with the bending angle shoulder 30c may be broken and cause a layer short. Therefore, by winding the wire 30 along the spiral guide member 14, the wire 30 is smoothly wound so that the corner portion of the shoulder 30c of the bending angle of the wire does not hit the edge of the wire. Is realized.

  Next, when a predetermined number of winding operations necessary for creating the spiral portion are completed, the wire 30 being supplied is cut at an appropriate position, and a front view and FIG. ) Is fixed by a line catch (b) 19 of the right side wall member 13 as shown in FIG. At this time, the line catch (b) 19 has the same configuration as that of the line catch (a) 18, and the cutting part is fixed to the entire main surface by printing. However, in FIG. 25B, the arrow indicates the rotation direction of the rotary drive shaft 20.

  Next, after removing the wire 30a from the wire catch (a) 18 and extending in the tangential direction of the winding core shaft 11, the spacer 16 is removed. Since the thickness of the spiral guide member 14 and the spacer 16 gives the wire thickness of the spiral portion of the coil when completed, after the spacer 16 is extracted, the front view of FIG. As shown in the drawing, a gap 40 suitable for winding the wire 30a is formed.

  Next, the rotary drive shaft 20 is rotated by a rotational power means (not shown), and the wire 30a is supplied to the gap 40 while applying a slight tension. Similar to the winding operation of the wire 30, the edge of the wire 30 a is wound around the winding core shaft 11, and a coil spiral portion is formed in a direction perpendicular to the rotation axis of the winding core shaft 11. The spiral portion formed here corresponds to the spiral portion 1b in the case of the alpha winding edgewise coil of the first embodiment. In addition, the arrow of FIG.26 (b) shows the rotation direction of the rotational drive shaft 20, and this is a direction opposite to the winding direction of the wire 30 performed previously.

  Next, the wire rod is removed from the wire catch (b) 19, the round pin 17 is pulled out, and the wire rod wound in a coil shape having the right side wall member 13 and the middle side wall plate 15 in between is sequentially taken out from the winding core shaft 11. . As shown in FIG. 27 (a), the state immediately after finishing the winding line is such that the two coil lead wires at both ends of the coil are in a straight line, but as shown in FIG. 27 (b). In addition, in a state where it is removed from the apparatus, the coil lead wire is in a parallel position by the spring back.

  Finally, the intermediate wall plate 15 sandwiched between the two spiral portions of the winding is taken out to complete the alpha winding edgewise coil. The part which becomes the transition part of the coil is in the slit 15b of the inner wall plate 15, and the gap of the slit 15b is larger than the thickness of the wire 30, so that it can be easily taken out.

  In the above operation, as shown in FIG. 28, the positional relationship between the two spiral guide members 14 is such that each of the spiral guide members 14 is mounted so as to be ready for winding and the winding core shaft 11. When viewed from the direction of the rotation axis, the end portions that give the maximum width w are positioned to face each other. Further, at this time, the positions of the end portions having the maximum width W of the respective spiral guide members 14 are slits 15a that are engraved in a direction that is asymmetrical when viewed from the side surface of the intermediate wall plate 15, as shown in FIG. It should be on the tangent line of the opening.

  In the above embodiment, the two spiral guide members 14 are described as being provided on the left side wall member 12 and the right side wall member 13, respectively. However, the spiral guide member 14 is a separate component. And may be bonded to predetermined positions of the left side wall member 12 and the right side wall member 13 with an adhesive or the like.

  Furthermore, the spiral guide member manufactured as a separate part may be provided on both main surfaces of the intermediate wall plate 15 as shown in FIG.

  In particular, when the spiral guide member 14 is provided on the inner wall plate 15, after the winding process is completed and taken out from the manufacturing apparatus, how to take out the inner wall plate 15 sandwiched between the two spiral portions of the winding is as follows. It is as follows.

  As shown in FIG. 30, the two spiral portions formed sandwich the inner wall plate 15 between them, and the thickness thereof is the same as that of the spiral guide member 14, so that the spiral guide member 14 is held. It has become.

  Therefore, in order to take out the inner wall plate 15, the spiral guide member 14 can be overcome by lifting up and down the spiral portion that is the front and back with the lower portion from the center of the winding portion as the center.

(Embodiment 8)
The present embodiment is a method for producing an alpha-winding edgewise coil according to the second embodiment, but the basic process is exactly the same as the manufacturing method according to the seventh embodiment. This preparation is performed, and n sheets are overlapped so that their main surfaces are in contact with each other, and a winding line is made simultaneously. Of course, the number of turns, the distance between the left and right side wall members, the middle side wall member, the spacers, and the like are the dimensions adapted to the total thickness of the stacked wires.

(Embodiment 9)
The present embodiment is a method of creating the alpha-wound edgewise coil of the third embodiment with a foil-shaped wire. The basic process is exactly the same as the manufacturing method of the seventh embodiment, and the above process is repeated twice.

  That is, in the seventh embodiment, the length of the line segment 30a is set to 3/4 of the total length of the alpha-winding edgewise coil as a finished product.

  In the coil taken out of the manufacturing apparatus after the creation of the pair of spiral portions is completed, the length of the wire necessary for creating the pair of spiral portions is rounded as the length of the lead wire as one end portion. Remaining. Using the lead wire as a wire rod, the necessary steps for creating a pair of spiral portions are performed again from each step of the manufacturing method.

  In the above description, the description has been made as creating an alpha-wound edgewise coil having two pairs of spiral portions, but when creating an alpha-wound edgewise coil having three or more pairs of spiral portions, The length of the line segment 30a is expressed as follows: (length necessary for creating a pair of spiral portions) × (the number of pairs of spiral portions of the completed alpha-winding edgewise coil−1) + (a pair of spiral portions Half of the wire length required for the above).

(Embodiment 10)
The present embodiment is a method of manufacturing the alpha-wound edgewise coil of the fourth embodiment with a foil-shaped wire.

  First, the alpha winding edgewise coil of the first embodiment is created by the same method as the seventh embodiment. This coil corresponds to the second coil of the fourth embodiment when completed.

  Next, instead of the middle wall plate 15 of the seventh embodiment, the operation of the seventh embodiment is performed by using a coil storage side plate in which the second coil is sandwiched between the first plate member and the second plate member. Repeat again.

  This will be described in more detail below. FIG. 31 (a) is a front view of the first plate member 51, and FIG. 31 (b) is a side view. FIG. 31 (c) is a front view of the second plate member 52, and FIG. 31 (d) is a side view.

  As shown in the figure, the first plate member 51 and the second plate member 52 have the same size as the middle wall plate 15 and correspond to the holes 51a and 52a corresponding to the holes 15a and the convex portions 15b. Slits 51c and 52c corresponding to the convex portions 51b and 52b and the slit 15b are provided, respectively. In addition, auxiliary slits 51d and 52d provided up to a part of the main surface are provided in the opposite directions to the slits 51c and 52c, respectively.

  Using the first plate member 51 and the second plate member 52 having such a configuration, as shown in FIG. 32, the first coil is connected to each of the first plate member 51 and the second plate member 52. The coil housing side plate 54 is completed by sandwiching the two main surfaces and fixing the outer peripheral portion with screws 53. The coil storage side plate 54 has the same function as the inner wall plate 15 and is used as a component that performs the same function.

  Therefore, in the operation of the seventh embodiment, the middle wall plate 15 is replaced with the coil housing side plate 53, and then the wire having a length necessary for obtaining the first coil is passed through the auxiliary slits 51d and 52d, By executing a series of operations as the 30a stock line in FIG. 25 (b), a pair of spiral portions sandwiching the coil storage side plate 15 therebetween is obtained.

  Finally, when the coil storage side plate 15 is taken out from the pair of spiral portions serving as the first coil, the screw 53 is removed, the first plate member 51 and the second plate member 52 are disassembled, and the second inside The coil is taken out to complete the alpha winding edgewise coil of the fourth embodiment. In addition, when it is necessary to make the inside diameter of the coil 1 small in order to pass the coil transition part 1c of the first coil through the inside diameter of the spiral part of the second coil, as shown in FIGS. A core core 61 having a small diameter may be used. At this time, the dimensions of the respective parts such as the left and right side wall members, the spacers, and the spiral guide member are made to be different in correspondence with the diameter and other parts of the winding core shaft 61.

(Embodiment 11)
The present embodiment is a method of creating the alpha-wound edgewise coil of the fifth embodiment, but is basically the same as that of the tenth embodiment, and instead of the coil storage side plate 53 sandwiching the alpha-wound edgewise coil. In addition, a coil storage side plate capable of storing the auxiliary coil 6 is used.

  FIG. 34 (a) is a front view of the first plate member 51, and FIG. 34 (b) is a side view, which is the same as the first plate member 51 of the tenth embodiment, and is detailed. Description is omitted. FIG. 34 (c) is a front view of the coil box 71, and FIG. 34 (d) is a side view.

  As shown in the figure, the coil box 71 has the same size as the middle wall plate 15 and, like the first plate member 51, the hole 71a corresponding to the hole 15a and the convex portion 71b corresponding to the convex portion 15b. , Slits 71c corresponding to the slits 15b are provided. Further, an auxiliary slit 71 d corresponding to the auxiliary slit 51 d of the first plate member 51 is provided.

  Using the first plate member 51 and the coil box 71 having such a configuration, as shown in FIGS. 35A and 35B, the auxiliary coil 6 is stored in the storage portion 71f of the coil box 71, and the first The coil housing side plate 73 is completed by joining the plate member 51 and the joining portion 71 e and fixing the outer peripheral portion with the screw 72. The coil storage side plate 73 has the same function as the inner wall plate 15 and is used as a component that performs the same function. Thereafter, the same processes as those in the tenth embodiment are performed, whereby the alpha-winding edgewise coil of the fifth embodiment is obtained.

  Furthermore, the alpha-winding edgewise coil of the fifth embodiment can be obtained by housing the annular dielectric 8 instead of housing the auxiliary coil 6.

  The coil box 71 and the first plate member 51 are joined by screws, but the joint portion 71e of the coil box may be a magnet material and the first plate member 51 may be a magnet stop. In short, whatever the shape of the coil, shield plate or object, it is sufficient if it can be made flat. From this point of view, if the coil is molded in parallel with resin and has a parallel plate shape, the first and second plate members and the coil box are not required.

  In addition, according to each said embodiment, although the alpha winding edgewise coil was created with the foil-shaped wire which exhibits a skin effect, as shown in FIG. 36, as for the conductor 80, the 1st layer insulator 81, When a three-layer insulating rectangular edge covered with an insulating layer consisting of three layers of a second layer insulator 82 and a third layer insulator 83 is used as a wire, and an alpha-fired edgewise coil is manufactured and used, Since the structure itself has a three-layer insulating structure, there is an effect that an insulating material between the coils and between the coils and between the cores becomes unnecessary. However, it is assumed that the three-layer insulation structure has not been destroyed in the wire processing or assembly process.

  When a transformer was created using such an alpha-wound edgewise coil, the height of the conventional product in which the parts other than the coil were configured as the same member was 12 mm, whereas the height of the transformer using the present invention was 4 mm. As a result, the height was lowered by 8 mm, and the effect of reducing the height could be achieved.

  According to the present invention, the coil structure and the alpha winding coil according to the present invention have the effect of reducing the height dimension of the electric and electronic components operating in the high frequency band, and are used for the electric and electronic components. It is useful as a structure and alpha winding coil.

Configuration diagram of alpha-winding edgewise coil according to Embodiment 1 of the present invention Configuration diagram of alpha-winding edgewise coil according to embodiment 2 of the present invention Configuration of Alpha-Wound Edgewise Coil according to Embodiment 3 of the Present Invention Configuration of Alpha-Wound Edgewise Coil according to Embodiment 4 of the Present Invention Configuration of Alpha-Wound Edgewise Coil according to Embodiment 5 of the Present Invention Configuration diagram of alpha-winding edgewise coil according to embodiment 6 of the present invention The figure which occupies the other structural example of the alpha volume edgewise coil by Embodiment 6 of this invention Front view of alpha winding edgewise coil manufacturing apparatus according to Embodiment 7 of the present invention Top view of alpha winding edgewise coil manufacturing apparatus according to Embodiment 7 of the present invention (A) Front view of the rolled core shaft 11 (b) Top view of the rolled core shaft 11 (A) Front view of left wall member 12 (b) Top view of left wall member 12 (A) Front view of right side wall member 13 (b) Top view of right side wall member 13 (A) Front view of middle side plate 15 (b) Top view of middle side plate 15 (A) Front view of spacer 16 (b) Top view of spacer 16 (A) Front view of round pin 17 (b) Top view of round pin 17 Front view of the spiral guide member 14 The figure for demonstrating the manufacturing method of the alpha volume edgewise coil of Embodiment 7 of this invention The figure for demonstrating the manufacturing method of the alpha volume edgewise coil of Embodiment 7 of this invention (A) The figure for demonstrating the position of a wire and an inner wall board in the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention (b) Of the alpha winding edgewise coil of Embodiment 7 of this invention The figure for demonstrating the position of a wire and an inner wall board in a manufacturing method (c) The figure for demonstrating the position of a wire in the manufacturing method of the alpha volume edgewise coil of Embodiment 7 of this invention (A) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention (b) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention The figure for demonstrating the positional relationship of a wire, an inner wall board, and a spacer in the manufacturing method of the alpha volume edgewise coil of Embodiment 7 of this invention. (A) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention (b) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention The figure for demonstrating the effect of the helical guide member 14 (A) The figure for demonstrating the effect of the spiral guide member 14 (b) The figure for demonstrating the effect of the spiral guide member 14 (A) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention (b) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention (A) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention (b) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention (A) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention (b) The figure for demonstrating the manufacturing method of the alpha winding edgewise coil of Embodiment 7 of this invention The figure for demonstrating the positional relationship of the helical guide member 14 The figure for demonstrating the other structural example of the intermediate wall board 15 The figure for demonstrating the manufacturing method of the alpha volume edgewise coil in the other structural example of the intermediate wall board 15 (A) Front view of first plate member in alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention (b) First of alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention (C) Front view of the 2nd board member in the manufacturing apparatus of the alpha winding edgewise coil of Embodiment 8 of this invention (d) Alpha winding edgewise coil of Embodiment 8 of this invention Side view of the second plate member in the manufacturing apparatus (A) Front view of coil storage side wall in alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention (b) Coil storage side wall of alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention Side view (A) Front view of winding core shaft in alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention (b) Winding core shaft of alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention Side view (A) Front view of first plate member in alpha winding edgewise coil manufacturing apparatus of Embodiment 9 of the present invention (b) First of alpha winding edgewise coil manufacturing apparatus of Embodiment 9 of the present invention (C) Front view of coil box in alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention (d) Alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention Side view of coil box (A) Front view of coil storage side wall in alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention (b) Coil storage side wall of alpha winding edgewise coil manufacturing apparatus of embodiment 8 of the present invention Side view Configuration diagram of three-layer insulated wire Configuration diagram of a conventional alpha-fired edgewise coil manufacturing device (A) The figure which shows the structure of the annular dielectric material used for the alpha winding edgewise coil by Embodiment 6 of this invention (b) Of the annular dielectric material used for the alpha winding edgewise coil by Embodiment 6 of this invention (C) The figure which shows the structure of the C-shaped dielectric material used for the alpha volume edgewise coil by Embodiment 6 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main winding 1a, 1b Spiral part 1c Coil transition part 1d, 1e End part 11 Winding core shaft 12 Left side wall member 13 Right side wall member 14 Spiral guide member 15 Middle side wall board 16 Spacer 17 Round pin

Claims (9)

It is composed of one winding having a pair of opposed spiral portions, and the winding direction of the winding in the spiral portion is parallel to the surface direction of the foil, and the innermost circumference of each of the pair of spiral portions Alpha winding coil where the parts are connected,
A secondary coil provided between the pair of spiral portions of the alpha winding coil,
The connection part of a pair of said spiral part is a coil structure which exists inside the spiral part of the said subcoil.   The sub-coil is composed of a single winding having a pair of opposed spiral portions, and the winding direction of the winding in the spiral portion is parallel to the surface direction of the foil, The coil structure according to claim 1, which is an alpha winding coil in which the innermost peripheral portions are connected to each other. It has a plurality of alpha winding coils having a pair of opposed spiral portions,
The innermost peripheral portions of the pair of spiral portions of the alpha coil are connected to each other,
Each said alpha winding coil has connected each outermost peripheral parts,
Each said alpha winding coil is a coil structure formed from one common coil | winding.   The coil structure according to any one of claims 1 to 3, wherein the winding has a foil-like configuration having a skin effect.   The coil structure according to any one of claims 1 to 3, wherein a wire covered with a three-layer insulating structure is used as the winding. A single winding having a pair of opposed spirals;
A low dielectric constant member having a through hole provided between the pair of spiral portions;
An alpha winding coil in which innermost peripheral portions of a pair of spiral portions of the single winding are connected to each other through the through hole. A single winding having a pair of opposed spirals;
A high dielectric constant member having a through hole provided between the pair of spiral portions;
An alpha winding coil in which innermost peripheral portions of a pair of spiral portions of the single winding are connected to each other through the through hole.   The alpha winding coil according to claim 6 or 7, wherein the winding has a foil-like configuration having a skin effect.   The alpha winding coil according to claim 6 or 7, wherein a wire covered with a three-layer insulation structure is used as the winding.

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