JP4860667B2 - Disc type coil - Google Patents

Description

  The present invention belongs to a technical field related to a disk-type coil incorporated as a stator, a rotor or the like of a flat type electromagnetic induction device.

  Recently, due to the trend of thinning of various devices, the demand for disk-type coils in which conductor patterns are formed by etching, pressing or the like is increasing. However, the disk type coil has a problem that the current value flowing is smaller than that of the coil wound with the wire because the conductive pattern is thin. For this reason, there is a demand for the development of a disk-type coil that can secure a large current value for increasing the output.

Conventionally, for example, those described below are known as disk-type coils aimed at securing a large current value for increasing the output.
JP-A-1-126142 discloses a disk-shaped (disc-shaped) insulating substrate and an insulating substrate provided on both sides of the insulating substrate and having end portions positioned on the outer peripheral side and inner peripheral side of the insulating substrate. Disc type coils having conductor patterns arranged in a waveform that folds back and forth alternately and through holes that are drilled in an insulating substrate to connect ends of the conductor patterns are described.

  The disk-type coil according to Patent Document 1 tries to ensure a large current value to increase the output by ensuring that the conductor pattern is disposed continuously on both surfaces of the insulating substrate and the conductor pattern is disposed long. To do.

  In the disk-type coil according to Patent Document 1, since the insulating substrate is circular, the inner peripheral space (insulating gap) of the conductor pattern to be arranged must be narrowed. Measures are taken to keep the gap between the conductor patterns constant so as to narrow toward the side. However, since the maximum current value flowing through the conductor pattern is limited to the narrowest width of the conductor pattern (assuming the thickness is constant), the current value flowing to increase the output cannot be secured sufficiently high. There is a problem.

  The present invention has been made in consideration of such problems, and an object of the present invention is to provide a disk-type coil capable of ensuring a sufficiently large current value for increasing the output.

  In order to solve the above-mentioned problems, the disk-type coil according to the present invention employs means described in each of the claims.

  That is, according to the first aspect of the present invention, the disk-shaped insulating substrate and the insulating substrate are provided on both surfaces of the insulating substrate so that the end portions are located on the outer peripheral side and inner peripheral side of the insulating substrate and are alternately folded on both surfaces of the insulating substrate. In a disk-type coil comprising a conductive pattern and a through-hole drilled in the insulating substrate to connect the end portions of the conductive pattern, the conductive pattern has an inner peripheral end disposed on a plurality of concentric lines. It is characterized by being aligned in the radial direction.

  In this means, the inner peripheral end of the conductive pattern is avoided by being arranged on a single circular line, and is retracted and aligned in the radial direction, thereby increasing the arrangement density on the inner peripheral side. The width and interval of the conductor pattern are kept constant.

  According to a second aspect of the present invention, in the disk type coil of the first aspect, a plurality of through holes are provided for each end of the conductor pattern.

  In this means, by providing a plurality of through holes, the conduction area in the through holes is expanded.

  According to a third aspect of the present invention, in the disk type coil according to the second aspect, the through holes are linearly aligned in the radial direction of the insulating substrate at the inner peripheral end of the conductor pattern.

  In this means, the plurality of through holes are linearly aligned in the radial direction of the insulating substrate, thereby preventing the conductor pattern from extending in the circumferential direction.

  According to a fourth aspect of the present invention, in the disk type coil according to the second or third aspect, the conductor pattern has an area in which an end is expanded.

  In this means, since the end portion of the conductor pattern has an expanded area, the reduction of the conduction area due to the drilling of the through hole is compensated.

  Further, according to claim 5, in the disk type coil according to any one of claims 1 to 4, the conductor pattern is formed by laminating a coil half part to which the start terminal pattern is connected and a coil half part to which the end terminal pattern is connected. It is connected by a pattern to form a coil winding shape, and the start terminal pattern, the end terminal pattern, and the connection pattern are drawn from the arrangement of the conductor pattern to the outer peripheral side or the inner peripheral side.

  In this means, two coil halves of a conductor pattern are laminated to form a coil winding shape, and a start terminal pattern, an end terminal pattern, and a connection pattern for connection are drawn out from the arrangement of the conductor pattern. Density conductor patterns are easily and reliably connected.

  The disk-type coil according to the present invention has a high density of arrangement by being retracted and aligned in the radial direction while avoiding the arrangement of the inner peripheral end of the conductor pattern on a single circular line. Since the width and interval of the conductor pattern on the inner peripheral side are kept constant, there is an effect that it is possible to secure a sufficiently large current value for increasing the output.

  Further, as claimed in claim 2, by providing a plurality of through holes, the conduction area in the through hole is expanded, and the restriction in the through hole of the maximum current value flowing through the conductor pattern can be eliminated. There is an effect that it is possible to secure a sufficiently large current value for flowing.

  Further, according to a third aspect of the present invention, since the plurality of through holes are linearly aligned in the radial direction of the insulating substrate, the conductor pattern is prevented from expanding in the circumferential direction. The width and interval of the conductor pattern on the side are more reliably maintained constant, and there is an effect that a sufficiently large current value can be ensured to increase the output.

  Further, as claimed in claim 4, since the end portion of the conductor pattern has an expanded area, the reduction of the conduction area due to the drilling of the through hole is compensated, so that the value of the flowing current is increased sufficiently to increase the output. There is an effect that can be secured.

  Further, as claimed in claim 5, two coil halves of a conductor pattern are laminated to form a coil winding shape, and a start terminal pattern, an end terminal pattern, and a connection pattern for connection are drawn from the arrangement of the conductor pattern. Therefore, since the high-density conductor pattern is easily and reliably connected, the manufacturing cost can be reduced.

  Hereinafter, the best mode for carrying out a disk-type coil according to the present invention will be described with reference to the drawings.

  In this embodiment, the one suitable for incorporation as a stator of a DC motor is shown.

  As shown in FIGS. 1 and 2, this form includes each part of an insulating substrate 1, a conductor pattern 2, a start terminal pattern 3, an end terminal pattern 4, a connection pattern 5, and a through hole 6.

  The insulating substrate 1 is formed in a substantially disc-shaped (disk-shaped) donut plate perforated with an insulating synthetic resin material. A shaft hole 11 is perforated at the center and starts at a part of the outer periphery. A flange portion 12 protruding outward is formed on which the terminal pattern 3, the terminal pattern 4, and the connection pattern 5 are arranged. For this insulating substrate 1, either a single-layer structure or a laminated structure can be selected, and either rigid or flexible can be selected.

  The conductor pattern 2 is formed in a coiled shape by an etching technique, a pressing technique, or the like of a metal material such as copper or aluminum, and is disposed on both surfaces of the insulating substrate 1. The conductor pattern 2 is provided with end portions 22 and 23 whose areas are expanded on the outer peripheral side and the inner peripheral side of the main body portion 21 whose straight line is bent. As for the main-body part 21, the thing from which the length differs toward the inner peripheral side from the outer peripheral side of the insulated substrate 1 is arrange | positioned. The outer peripheral end 22 is disposed on a single circular line a of the insulating substrate 1 and has an area expanded in the circumferential direction of the insulating substrate 1. The end portions 23 on the inner peripheral side are arranged on a plurality of concentric lines b corresponding to different lengths of the main body portion 21, and are aligned with the area expanded in the radial direction c of the insulating substrate 1. Note that, on both surfaces of the insulating substrate 1, the conductor pattern 2 is arranged to be alternately folded at the end portions 22 and 23.

  The conductor pattern 2 is formed by laminating a coil half 2a continuous through the through hole 6 shown in FIG. 3 and a coil half 2b continuous through the through hole 6 shown in FIG. The coil winding shape shown in FIG. And 3 units are laminated | stacked on this coil winding shape as 1 unit.

  The start terminal pattern 3 is connected to the outer peripheral end 22 located at the continuous start terminal of one coil half 2 a of the conductor pattern 2 and is drawn out to the flange portion 12 of the insulating substrate 1. The starting terminal pattern 3 is formed integrally with the conductor pattern 2.

  The end terminal pattern 4 is connected to the outer peripheral end 22 located at the continuous end of the other coil half 2 b of the conductor pattern 2, and is drawn out to the flange portion 12 of the insulating substrate 1. The terminal pattern 4 is formed integrally with the conductor pattern 2.

  The connection pattern 5 includes an outer peripheral end 22 located at the continuous end of one coil half 2a of the conductor pattern 2 and an outer periphery located at the continuous start of the other coil half 2b of the conductor pattern 2. It is connected to the end portion 22 on the side and is drawn out to the flange portion 12 of the insulating substrate 1. The connection pattern 5 is formed integrally with the conductor pattern 2.

  As shown in FIG. 4, the through hole 6 is formed in the insulating substrate 1 and connects the end portions 22 and 23 of the conductor pattern 2 by electroplating or the like. (Three) are provided. A plurality of through holes 6 are arranged on a single circular line a of the insulating substrate 1 and are aligned in the circumferential direction of the insulating substrate 1 at the outer end 22 of the conductor pattern 2. Further, at the end portion 23 on the inner peripheral side of the conductor pattern 2, a plurality of through holes 6 are arranged on a plurality of concentric circles b of the insulating substrate 1 and aligned in the radial direction c of the insulating substrate 1.

  According to this embodiment, the two coil halves 2a and 2b of the conductor pattern 2 are laminated to form a coil winding shape, and the start terminal pattern 3, the end terminal pattern 4, and the connection pattern 5 for connection are the conductor pattern 2. Drawn from placement. Therefore, since the high-density conductor pattern 2 is connected easily and reliably, it can be manufactured at low cost.

  Then, in the disc-shaped insulating substrate 1, the inner peripheral side end portion 23 of the conductor pattern 2 is avoided from being arranged on a single circular line, and the inner peripheral side end portion 23 of the conductive pattern 2 has a plurality of ends. By being arranged on the concentric circle b and retracted and aligned in the radial direction c, the width and interval (insulating gap) of the conductor pattern 2 on the inner peripheral side where the arrangement density becomes high are kept constant. Therefore, a sufficiently large current value for increasing the output can be secured. In addition, since the heat radiation performance is improved by keeping the width and interval of the conductor pattern 2 constant, it is possible to prevent performance deterioration with time due to heat.

  In addition, by providing a plurality of through holes 6 for each of the end portions 22 and 23 of the conductor pattern 2, the conduction area in the through hole 6 is expanded. Therefore, since the restriction on the maximum current value flowing through the conductor pattern 2 at the through hole 6 can be eliminated, a sufficiently large current value can be ensured to increase the output. At the end 23 on the inner peripheral side of the conductor pattern 2, the plurality of through holes 6 are linearly aligned in the radial direction c of the insulating substrate 1, thereby preventing the conductor pattern 2 from extending in the circumferential direction. Is done. Therefore, the width and interval of the conductor pattern 2 on the inner peripheral side where the arrangement density is high can be more reliably maintained constant, and a sufficiently large current value can be ensured to increase the output.

  Further, since a plurality of through holes 6 are provided and the end portions 22 and 23 of the conductor pattern 2 have an expanded area, a reduction in the conduction area due to the drilling of the through holes 6 is compensated. Therefore, it is possible to secure a sufficiently large current value for increasing the output. In addition, since the end 23 on the inner peripheral side of the conductor pattern 2 is expanded in the radial direction c of the insulating substrate 1, there is no problem in keeping the width and interval of the conductor pattern 2 constant.

  As described above, in addition to the illustrated form, the conductor pattern may be arranged in another coil winding shape.

  Furthermore, the coil winding shape formed by the two coil halves 2a and 2b of the conductor pattern 2 can be 2 units or 4 units or more.

  Furthermore, the start terminal pattern 3, the end terminal pattern 4, and the connection pattern 5 can be drawn out to the inner peripheral side of the insulating substrate 1.

It is a surface view of the best mode for carrying out the disk type coil according to the present invention. It is a reverse view of FIG. It is an extraction figure of the principal part of FIG. FIG. 4 is an enlarged longitudinal sectional view of FIG. 3. FIG. 3 is an extraction diagram of another main part of FIG. 1. FIG. 6 is a combination diagram of FIGS. 3 and 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulation board | substrate 2 Conductor pattern 2a, 2b Coil half part 23 End part (inner peripheral side)
3 Start terminal pattern 4 End terminal pattern 5 Connection pattern 6 Through hole

Claims (5)

  Insulating a disc-shaped insulating substrate, a conductor pattern provided on both sides of the insulating substrate, with end portions positioned on the outer peripheral side and inner peripheral side of the insulating substrate, and alternately folded on both sides of the insulating substrate In a disk-type coil having a through-hole drilled in a substrate and connecting the end portions of the conductor pattern, the end portions on the inner peripheral side are arranged on a plurality of concentric circles and aligned in the radial direction of the insulating substrate. A disk-type coil characterized by having   2. The disk type coil according to claim 1, wherein a plurality of through holes are provided for each end of the conductor pattern.   3. The disk type coil according to claim 2, wherein the through holes are linearly aligned in the radial direction of the insulating substrate at the inner peripheral end of the conductor pattern.   4. The disk type coil according to claim 2, wherein the conductor pattern has an area with an extended end.   5. The disk-type coil according to claim 1, wherein the conductor pattern is formed by laminating a coil half portion to which the start terminal pattern is connected and a coil half portion to which the end terminal pattern is connected, and connecting them in the connection pattern. A disk-type coil having a shape, wherein a start terminal pattern, an end terminal pattern, and a connection pattern are drawn from an arrangement of conductor patterns to an outer peripheral side or an inner peripheral side.

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