JP2019030113A - Disk type coil and rotary electric machine using the same - Google Patents

Abstract

To improve motor efficiency of a disk type coil and a rotary electric machine using the same.SOLUTION: In a disk type coil constituted so that a coil of at least one circuit is constituted between a conductor pattern 1 on the front face and a conductor pattern 1 on the rear face of a disk type annular insulated substrate by conducting the conductor patterns 1 formed on the front and rear faces of the annular insulated substrate by through hole connection, a pattern width of one coil is divided into a magnetic flux passage part 2 passing through the inside of a magnetic field and a crossover part 3 outside the magnetic flux passage part 2, a pattern width W2 of the magnetic flux passage part 2 is a pattern width narrower than a pattern width by which at least allowable maximum eddy current loss is generated, and pieces of pattern width W4, W5 of the cross over part 3 become wider than the pattern width W2 of the magnetic flux passage part 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a disk-type coil (also referred to as a planar coil) in which a conductor pattern is formed on an insulating substrate by etching or pressing, and a rotary electric machine using the same.

  This type of disk-type coil is generally formed by applying printed circuit board manufacturing technology, and the conductor pattern fixed on the insulating substrate is very thin. It will be restricted. Moreover, since the conductor pattern is formed on the insulating substrate having a limited size, the amount of wiring is limited. For this reason, in order to increase the motor output, by setting the pattern width and the conductor gap of the conductor pattern uniformly, the pattern density is increased to increase the current value flowing through the conductor pattern (Patent Document 1). ).

  On the other hand, in the case of a relatively thick conductor pattern in which a thin plate metal material is punched out by a pressing technique or the like, the distance between the magnets is increased and the demagnetization is reduced when the disks are laminated. It is not preferable to make the thickness of the pattern too large.

  For this reason, in order to obtain a high output / high torque disk type coil, it is necessary to increase the current capacity by increasing the coil cross-sectional area. -Even if it is going to increase the thickness of the conductor, there is a limit, or it is not preferable to make it too thick from the viewpoint of demagnetization. Therefore, it is necessary to widen the pattern width to reduce the conductor resistance. That is, by setting the pattern width large, the conductor resistance is lowered to reduce the resistance loss.

Japanese Patent No. 469956

  However, when the pattern width of the conductor pattern was set to be large, the eddy current loss generated in the conductor portion of the magnetic flux passing portion that crossed the magnetic flux increased conversely, and the result that the rotation loss increased was obtained. In other words, when the pattern density is increased by setting the pattern width and conductor gap of the conductor pattern uniformly, the conductor resistance value increases when the pattern width is narrowed, and the eddy current loss increases when the pattern width is widened to reduce the resistance value. It has been found that the motor efficiency decreases due to the contradictory relationship of increasing the motor.

  That is, since the cause of the eddy current increases in proportion to the pattern width of the conductor pattern, the output efficiency of the rotating machine is reduced by the heat generated by the generation of the eddy current. In order to suppress this eddy current, it is necessary to reduce the pattern width of the conductor pattern. However, since the conductor resistance value is increased and the current value is restricted, a rotating machine with a large output cannot be realized. As a result, the motor efficiency is reduced.

  An object of the present invention is to provide a disk-type coil capable of improving motor efficiency and a rotating electric machine using the same.

  In order to achieve such an object, the present invention provides a conductive pattern formed on the front and back surfaces of a disk-shaped annular insulating substrate through a through-hole connection so that the conductive pattern on the surface of the insulating substrate is connected to the conductive pattern on the back surface. In the disk-type coil configured to constitute at least one circuit coil, the pattern width of one coil is divided into a magnetic flux passage portion that passes through the magnetic field and a crossover portion outside the magnetic flux passage portion, and the magnetic flux passage portion The pattern width is narrower than the pattern width where the maximum allowable eddy current loss occurs, and the pattern width of the crossover portion is made wider than the pattern width of the magnetic flux passage portion.

  The disk type coil according to claim 2 is characterized in that the pattern width of the magnetic flux passage portion is within 0.8 mm.

  According to a third aspect of the present invention, there is provided a disk-type coil including a through-hole for stacking that electrically connects a terminal end or a start terminal of a conductor pattern with a start terminal or a terminal end of a conductor pattern of another disk-type coil.

  According to a fourth aspect of the present invention, there is provided a disk-type coil in which the conductor pattern is composed of multiple windings to form one coil.

  According to a fifth aspect of the present invention, there is provided a disk-type coil comprising: a magnetic flux passage conductor whose conductor pattern linearly extends in a radial direction perpendicular to the magnetic flux passage locus at the magnetic flux passage portion; and a crossover conductor outside the magnetic flux passage portion. The crossover conductor is configured, and the crossover conductor is arranged in the circumferential direction along the magnetic flux passage locus, and the crossover transition conductor that connects the magnetic flux passage conductor and the crossover main conductor with a curved conductor Are provided.

  A rotary electric machine according to a sixth aspect of the invention is characterized in that the disk-type coil according to any one of the first to fifth aspects is provided as an armature or a stator coil.

  According to the disk type coil of the first aspect, the pattern width of one coil is divided into a magnetic flux passage portion that passes through the magnetic field and a crossover portion outside the magnetic flux passage portion, and the pattern width of the magnetic flux passage portion is allowed. While suppressing the generation of eddy currents as a pattern width that is narrower than the pattern width at which the largest eddy current loss occurs, the conductor pattern is made by making the connecting wire outside the magnetic flux passage area wider than the pattern width of the magnetic flux passage area. The motor efficiency can be improved by reducing both the eddy current and the conductor resistance value by reducing the overall resistance value (suppressing the increase in resistance).

  According to the disk type coil of the second aspect, the pattern width of the magnetic flux passage portion is set to within 0.8 mm, the generation of the eddy current is suppressed, the resistance value of the entire conductor pattern is lowered, and the pattern density is increased to output. Can be increased.

  Further, according to the disk type coil of claim 3, a plurality of layers are formed through the through holes for lamination that make the terminal end or the start terminal of the conductor pattern conductive with the terminal end or the terminal end of the conductor pattern of another disk type coil. The conductor resistance as a whole can be further reduced by connecting conductor patterns in parallel between (a plurality of) disks. Further, the voltage can be further increased by connecting the conductor patterns between the multiple layers of disks in series.

  Further, according to the disk type coil according to claim 4, since the conductor pattern is composed of multiple windings, only one through hole for connecting the conductor patterns on the front and back of the disk is required. The influence of the current flow being suppressed by the conductor pattern connecting through hole can be reduced to facilitate the current flow, and the motor efficiency can be further improved. In addition, since the number of through holes can be significantly reduced, the cost can be reduced by drastically reducing the number of processing steps.

  According to the disk type coil of the fifth aspect, the conductor pattern formed by multiple windings includes a magnetic flux passage conductor that linearly extends in the radial direction perpendicular to the magnetic flux passage locus at the magnetic flux passage portion, and the magnetic flux passage. The connecting wire portion conductor is composed of a connecting wire main conductor portion arranged in the circumferential direction along the magnetic flux passage locus, and the magnetic flux passing portion conductor and the connecting wire main conductor portion. Since it has a crossover transition conductor connected by a curved conductor, even if the crossover transition conductor and some of the innermost crossover main conductor are on the magnetic flux passage, the effect of eddy current loss It is thought that it is hard to receive. In other words, the arc-shaped crossover transition conductor portions at both ends of the crossover main conductor portion arranged in the circumferential direction along the magnetic flux passage locus cross with an inclination with respect to the magnetic flux, so that the generated eddy current loss is reduced. Therefore, a conductor pattern having a large number of turns can be formed on a commercially available ring-shaped insulating substrate so as to form a crossover portion even if it overlaps the magnetic flux passing trajectory, or even partially overlaps, thereby increasing the pattern density. Can increase the motor output.

  Further, according to the rotary electric machine according to claim 6, since the disk type coil according to any one of claims 1 to 5 is used as an armature or a stator coil, the conductor resistance is suppressed while suppressing eddy current loss. By reducing the motor efficiency, the motor efficiency can be improved.

It is a front view which shows one Embodiment of the conductor pattern which applied the disk type coil which concerns on this invention to the heavy wound coil. It is a figure which shows one Embodiment of the three-phase disc type coil comprised by the conductor pattern of FIG. 1, (A) is a front view, (B) is a back view, (C) is a center longitudinal cross-sectional view. It is a front view which shows one Embodiment of the conductor pattern which applied the disk type coil which concerns on this invention to the wave winding coil. It is a figure which shows one Embodiment of the three-phase disk type | mold coil comprised by the conductor pattern of FIG. 3, (A) is a surface figure, (B) is a center longitudinal cross-sectional view. It is a front view which shows other embodiment of the conductor pattern which applied the disk type coil which concerns on this invention to the heavy wound coil. It is a front view which shows other embodiment of the conductor pattern which applied the disk type coil which concerns on this invention to the heavy wound coil. It is a front view which shows other embodiment of the conductor pattern which applied the disk type coil which concerns on this invention to the heavy wound coil.

  Hereinafter, the configuration of the present invention will be described in detail based on embodiments shown in the drawings. In the present specification, the conductor pattern roughly divides the pattern width of one coil into a portion that passes through the magnetic field and the outside of the magnetic field, and a gap between a pair of permanent magnets arranged facing each other ( The conductor area (effective coil area that contributes to torque generation or power generation) arranged in the magnetic gap is called the magnetic flux passage that passes through the magnetic field, and the conductor area that is arranged outside the gap and does not overlap the permanent magnet ( The coil end region that does not contribute to torque generation or power generation) is called a crossover portion outside the magnetic flux passage portion, and the crossover conductor is a crossover main conductor portion arranged in the circumferential direction along the magnetic flux passage locus, and the magnetic flux The crossing conductor and the crossover main conductor are referred to as a crossover transition conductor connecting the curved conductor.

  FIG. 1 shows an embodiment of a conductor pattern / coil pattern constituting a disk type coil of the present invention.

  The disk-type coil of this embodiment is a double-sided printed board in which a conductor pattern is formed on both sides of an insulating board by etching or printing technology, for example. The conductor pattern / coil 1 is not limited to a specific structure / shape, and can be implemented by double winding or wave winding. In this embodiment, an inverted triangle (fan-shaped) coil is formed by multiple winding. . Of course, even in the case of heavy winding, other shapes not shown, for example, a quadrangular shape or a hexagonal shape may be used. In such a heavy winding, at least one through-hole land 8 is required which is provided with a through-hole 6 for connecting the front and back conductor patterns that connects the front and back conductor patterns 1 of the insulating substrate 10 with one winding. On the other hand, in the case of wave winding, since at least two through-hole lands 8 are provided at both ends for providing the through-holes 6 for connecting the front and back conductor patterns for each coil piece, a large number of through-holes for connecting the front and back conductor patterns 6 is required. That is, when the winding is heavy, the number of through-holes 6 for connecting the front and back conductor patterns can be greatly reduced. As a result, the cost can be reduced by greatly reducing the number of processing steps. Moreover, it can be made difficult to receive the influence by which an electric current is suppressed. As a result of experiments conducted by the present inventors, it was found that there was no through-hole 6 connecting the conductor patterns 1 on the back and front of the insulating substrate 10 and when there was no through-hole 6 even when the current was not passed, When trying to flow, the reason is unknown, but it has been found that the presence of the through-hole 6 causes a phenomenon that current is difficult to flow. That is, it has been clarified that the multi-winding conductor pattern 1 capable of overwhelmingly reducing the number of through-holes 6 for connecting the front and back conductor patterns is higher in output than the wave-winding conductor pattern 1.

  The conductor pattern 1 in FIG. 1 starts to spiral from the outside to the inside and finishes winding on the inside, and on the back side of the insulating substrate 10, on the contrary, starts winding from the inside and finishes winding on the outside. Show. The conductive patterns 1 on the front and back sides of the insulating substrate 10 are electrically connected through the through-holes 6 for connecting the front and back conductor patterns formed at the ends of the innermost conductor so as to form one coil as a minimum unit. Is formed. On the other hand, the end of the outermost conductor of each conductor pattern 1 is drawn to the inner peripheral side of the insulating substrate 10 to form a start terminal pattern and an end terminal pattern, and a through-hole 7 in which an in-phase connection through hole 7 is drilled at the end. A hole land 9 is formed. It is provided so as to be electrically connected to another in-phase conductor pattern 1 on the same substrate 10 through the in-phase connection through hole 7 to form one coil circuit (one-phase coil circuit). Furthermore, the through-hole land 9 and the in-phase connection through-hole 7 that are used as a free end terminal pattern and an end terminal pattern that are free at both ends of one coil circuit are provided in the conductor pattern 1 between a plurality of (multiple) disks. When these are connected in parallel or in series, they are used as through-hole lands and through-holes for stacking.

  The conductor pattern 1 is roughly divided into a magnetic flux passage portion 2 that linearly extends in the radial direction perpendicular to the magnetic flux passage locus at the magnetic flux passage portion, and a connecting wire portion 3 outside the magnetic flux passage portion 2. The wire portion 3 includes a crossover main conductor portion 5 disposed in the circumferential direction along the magnetic flux passage locus 12, and a crossover transition conductor portion 4 that connects the magnetic flux passage portion 2 and the crossover main conductor portion 5 with a curved conductor. Consists of. The conductor pattern 1 has a pattern width W2 of a linear magnetic flux passage portion 2 that is arranged at right angles to the magnetic flux, and the pattern width W2 of the linear magnetic flux passage portion 2 arranged at right angles to the magnetic flux. The pattern widths W4 and W5 of the crossover portion 3 outside the magnetic flux passage portion 2 parallel to the magnetic flux passage locus 12 or obliquely intersecting with the magnetic flux are smaller than those of the magnetic flux passage portion 2 so as to be at least within an allowable range. It is formed so that the conductor resistance of the entire circuit can be lowered. Note that the connecting wire transition conductor portion 4 made of a curved conductor does not cross the magnetic flux at a right angle as much as the magnetic flux passage portion (straight portion) 2, so that the rate of occurrence of eddy current loss is smaller than that of the magnetic flux passage portion 2. In addition, the conductor resistance decreases as the pattern width W4 increases. Therefore, a certain degree of suppression of eddy current and reduction of conductor resistance can be solved simultaneously. Moreover, the cooling effect of the conductor pattern 1 is also improved by increasing the conductor cross-sectional area of the crossover part 3. Note that reference numeral 13 in the figure denotes a center hole that penetrates the shaft.

  According to experiments by the present inventors, it has been clarified that an eddy current is generated in the magnetic flux passage portion 2 crossing the magnetic flux, and the magnitude thereof increases as the pattern width W2 is increased. Therefore, it is desired that the pattern width W2 in the magnetic flux passage portion 2 is at least a pattern width that is narrower than the pattern width at which the maximum allowable eddy current loss occurs, preferably a pattern width that sufficiently suppresses the eddy current. . For example, in the case of the conductor pattern 1 by etching with a pattern thickness of 200 μm, an eddy current exceeding the maximum allowable eddy current loss occurs when the pattern width W2 exceeds 1 mm, so that the pattern width W2 does not exceed 1 mm. Preferably there is. On the other hand, when the pattern width W2 is reduced, the conductor cross-sectional area is reduced and the conductor resistance is increased. Therefore, it is necessary to form the pattern width W2 of the magnetic flux passage portion 2 to a pattern width that can secure a cross-sectional area that can be reduced as long as the eddy current is suppressed and an increase in the conductor resistance is allowed. From this, in order to suppress the generation of eddy currents, the pattern width W2 of the magnetic flux passage portion 2 is at least a pattern width that can be suppressed to the maximum allowable eddy current loss, for example, 1 mm or less, preferably 0.8 mm. Is to be within. Here, the minimum width of the pattern width W2 is limited to 0.2 mm in the current etching processing technique. Therefore, this pattern width is set to the minimum value, but is not limited to this. Needless to say, when a processing technique capable of forming a pattern of 2 mm or less is developed, a minimum width that can be formed by the processing technique may be adopted. Therefore, the pattern width W2 of the magnetic flux passing portion 2 is, for example, 0.2 mm to 1 mm, preferably 0.2 mm to 0.8 mm, more preferably 0.4 mm to 0.8 mm, regardless of the conductor thickness (conductive material thickness). It is made to form within the range. For example, in the case of the conductive pattern 1 formed by etching (thickness 200 μm), 0.6-0.8 mm, and in the case of the relatively thick conductive pattern 1 obtained by punching a thin plate-like metal material by a pressing technique or the like. It is preferable to maintain the cross-sectional area by reducing the width (approaching a width of 0.2 mm). When the thickness of the conductor pattern 1 is increased, the thickness of the conductor pattern 1 is increased when the disk-type coil is laminated, the distance between the magnets is increased, and demagnetization is performed, so that the thickness of the conductor pattern 1 is excessively increased. That is not a good idea. In other words, the above-mentioned “the pattern width W2 of the magnetic flux passage portion 2 is independent of the conductor thickness (the same electrical material thickness)” naturally has a limit on the copper thickness of the substrate. ) Means no need to consider.

  On the other hand, the pattern width W5 of the crossover main conductor portion 5 of the crossover portion 3 and the pattern width W4 of the crossover transition conductor portion 4 are formed wider than the pattern width W2 of the magnetic flux passage portion 2, and preferably pass through the magnetic flux. The pattern width W2 is 1.2 times or more of the pattern width W2. Thereby, the conductor resistance of the conductor pattern 1 as a whole can be reduced while suppressing the generation of eddy currents in the magnetic flux passage portion 2. Here, if the pattern widths W4 and W5 of the crossover part 3 are at least 1.2 times the pattern width W2 of the magnetic flux passage part 2, an effect of lowering the resistance value of the entire pattern can be obtained, and an increase in output is expected. it can. On the other hand, if the pattern widths W4 and W5 of the crossover portion 3 are less than 1.2 times the pattern width W2 of the magnetic flux passage portion 2, the effect of lowering the resistance value of the entire pattern is diminished, so an increase in output cannot be expected. On the other hand, the pattern widths W4 and W5 of the crossover portion 3 are preferable because the electrical resistance can be lowered as the width increases, but at the same time, the same substrate size leads to a reduction in the number of coil turns of the conductor pattern that can be formed. The pattern width W2 is preferably 3 to 4 times the pattern width W2. That is, if the pattern width W5 of the crossover part 3 is increased within the range of 1.2 to 3 times or 4 times the pattern width of the magnetic flux passage part, the number of coil turns can be reduced while lowering the conductor resistance value of the entire conductor pattern. You can earn. In this case, since the conductor pattern having a large number of turns can be formed while lowering the overall electric resistance value of the conductor pattern, the pattern density can be increased and the motor output can be increased. Further, if the size of the annular insulating substrate is made larger than that of a commercially available standard product, it is possible to exceed 3 to 4 times the pattern width W2 of the magnetic flux passage part 2, exceeding the pattern width W2 of the magnetic flux passage part 2. However, the effect of lowering the resistance value of the entire pattern can be obtained. However, adopting a non-standard annular insulating substrate is accompanied by a problem that the cost is increased and the motor is increased in size. In addition, since the size of the commercially available annular insulating substrate is determined, the pattern widths W4 and W5 of the crossover part 3 outside the magnetic flux passage part 2 exceed the pattern width W2 of the magnetic flux passage part 2 by 3 to 4 times. If you try to increase the number of turns at the same time while making it wider, it will not fit on the insulating substrate, and if you reduce the number of turns to fit it, the output will decrease. From this, the pattern width W5 of the crossover main conductor portion 5 of the crossover portion is within the range of W2 × 1.2 to 4 times when the pattern width W2 of the magnetic flux passage portion is 0.2 to 0.4 mm. Preferably, when the pattern width W2 is 0.5 to 0.8 mm, it is preferably within a range of W2 × 1.2 to 3 times.

  Here, the conductor pattern 1 of the present embodiment shown in FIG. 1 has the connecting wire main conductor portion 5 and the connecting wire transition conductor portion 4 of the connecting wire portion 3 outside the magnetic flux passing locus 12 (region overlapping the permanent magnet 11). Although it is formed, it is not particularly limited to this, and depending on the case, a part of the crossover part 3, for example, the innermost peripheral part of the crossover main conductor part 5 on the outer diameter side as well as the crossover as shown in FIG. The conductor pattern 1 may be formed so that the magnetic flux passage locus 12 overlaps a part of the line transition conductor portion 4. Since the crossover portion 3 does not cut the magnetic flux at a right angle, the generated current loss is also reduced. In particular, since the crossover transition conductor portions 4 at both ends at the boundary with the magnetic flux passage portion 2 are arc-shaped and cross with an inclination with respect to the magnetic flux, the generated eddy current loss is also reduced. Therefore, even if a part of the crossover main conductor portion 5, for example, the innermost peripheral portion is on the magnetic flux passage locus 12, it is considered that it is not easily affected by the occurrence of eddy current loss. Moreover, the output can be increased by increasing the number of turns without changing the size of the insulating substrate 10.

  According to the conductor pattern 1 according to the above-described embodiment, the pattern width of one coil is divided into the magnetic flux passage portion 2 that passes through the magnetic field and the connecting wire portion 3 outside the magnetic flux passage portion 2. The pattern width W2 is set to be narrower than the pattern width where at least the maximum allowable eddy current loss is generated, and the generation of eddy currents is suppressed. Since the conductor resistance of the entire circuit is lowered by making it wider than the pattern width W2, the motor efficiency can be improved. In addition, by connecting conductor patterns 1 of a plurality of layers and a plurality of disk-type coils in parallel, or by connecting conductor patterns 1 of other coils on the same substrate in parallel, the conductor resistance is further reduced to improve motor efficiency. Can be improved.

  FIG. 2 shows an embodiment in which the disk type coil of the present invention is applied to a three-phase conductor pattern. The disk-type coil 14 has an insulating substrate 10, a conductor pattern 1, front and back conductor pattern connection through holes 6, and in-phase connection through holes 7. The front and back conductor pattern connection through holes 6 arranged on the inner peripheral side and the in-phase The conductor pattern 1 formed on the front surface and the back surface of the insulating substrate 1 is electrically connected through the connection through hole 7 so that one coil circuit is formed by making a round in the circumferential direction of the insulating substrate. A three-phase, ten-pole magnetic conductor pattern is formed. That is, by connecting the spiral conductor patterns 1 formed in opposite directions at the same positions on the front and back surfaces of the insulating substrate 10 through the through-holes 6 for connecting the front and back conductor patterns, one coil of the smallest unit is provided. Is formed. And it is electrically connected to another in-phase conductor pattern 1 on the same substrate through the in-phase connection through hole 7 of the conductor pattern 1 forming each minimum unit coil to form one coil circuit (one-phase coil circuit). Thus, a three-circuit coil is formed. Of course, the conductor pattern 1 is not limited to the above-described three-phase / three circuits, and may be one unit, two units (two circuits), or four units (four circuits) or more.

  Here, the in-phase connection through-holes 7 which are free at both ends of one coil circuit are used to form the conductor pattern 1 as a start terminal pattern and an end terminal pattern, or between a plurality of layers (a plurality of) disk-type coils 14. Used as a through hole for stacking when connected in parallel or in series. In the present embodiment, three sets (U, V, W of three phases) of conductive patterns 1 are formed, but there is no reason to be particularly limited to this. It is also possible to configure as a single-phase conductor pattern 1 for direct current rotary electricity. However, in the current situation where the inverter technology is advancing, there is little significance to make it as a single-phase motor. If you make a coil with three phases, you can make a circuit with a single disk, and you can also make an AC motor. Furthermore, the output can be increased by overlapping a plurality of disk-type coils 14.

  The insulating substrate 10 is formed of an annular disk having a center hole (shaft hole) 13 perforated at the center, and is made of, for example, an insulating synthetic resin material or paper. The material of the insulating substrate 10 and the method of manufacturing the conductor pattern 1 are not limited to a specific material / method, and the material / method is appropriately selected. For example, the insulating substrate 10 can be selected to be either hard or flexible. In general, the insulating substrate 10 is roughly classified into paper phenol and glass / epoxy, and a composite substrate, a ceramic substrate, or the like in which paper and a glass substrate are mixed may be used. The conductor pattern 1 is formed into a required pattern by partially dissolving and corroding a copper-based or aluminum-based foil attached on both surfaces of the insulating substrate 10 by, for example, etching by a photolithography method, or by a pattern plating transfer method. Conductive fine pattern formation technology, printing with conductive conductive paint, molding with a 3D printer, or stamping a thin metal plate into a required pattern by pressing technology etc. It is formed by. Incidentally, the conductor pattern 1 can be formed with a pattern thickness of about 200 μm by etching, and with a pattern thickness of about 500 μm by the transfer method. The insulating substrate 10 in this embodiment uses a glass / epoxy substrate (FR-4) as a base material, and has a copper foil affixed to both the front and back surfaces, and is processed by etching.

  For example, in the case of this embodiment, each of the conductor patterns 1 wound in a spiral shape has a pattern width W2 of the magnetic flux passage portion 2 of 0.6 mm, a pattern width W5 of the crossover main conductor portion 5 of 1.0 mm, and a crossover transition. The pattern width W4 of the conductor portion 4 is formed of a conductor that curves while gradually expanding from 0.6 mm to 1.0 mm, and the pattern thickness is 200 μm. Further, the through-hole land portions 8 and 9 are formed with a pattern width required from a machining requirement for drilling the through-holes 6 and 7.

  In the case of the disk type coil 14 configured as described above, the eddy current generated in the conductor of the magnetic flux passage portion 2 is suppressed, and the pattern widths W4 and W5 of the crossover portion 3 are widened to reduce the conductor resistance. Therefore, since the overall conductor resistance as the conductor pattern 1 is reduced, the optimum number of coil turns can be obtained, and the resistance value (R) and eddy current (A) can be reduced to improve the induction machine efficiency. .

  Thus, according to the rotating electrical machine in which the disk-type coil according to the above-described embodiment is incorporated as an armature or a stator coil, it is possible to suppress the generation of eddy currents and reduce the conductor resistance of the entire coil circuit. The motor efficiency can be improved.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, in each of the embodiments shown in FIGS. 1 to 2, the present invention has been described with reference to an example in which a coil is mainly formed with a heavy conductor pattern 1. It is also possible to apply to a simple conductor pattern 1, for example, a corrugated conductor pattern 1 ′ as shown in FIGS.

  In the case of the wave winding coil, it is formed so as to constitute one coil by alternately folding back into a waveform between the front surface and the back surface of the insulating substrate 10. That is, a conductor pattern 1 'shown in FIG. 3 formed as a half coil portion and shifted by 1/2 pitch on the front and back sides is sequentially connected through the front and back conductor pattern connecting through holes 6', 6 ". As a unit, for example, as shown in FIG. 4, a three-phase, ten-pole magnetic conductor pattern is formed by forming three units in phase with respect to the annular insulating substrate.

  This conductor pattern 1 ′ also includes a magnetic flux passage portion 2 that linearly extends in a radial direction orthogonal to the magnetic flux passage locus 12, and a jumper wire portion 3 outside the magnetic flux passage portion 2. Is a connecting wire transition conductor portion 4 connecting the connecting wire main conductor portion 5 extending in the circumferential direction while being inclined with respect to the magnetic flux passage locus 12 and the magnetic flux passing portion 2 and the connecting wire main conductor portion 5 with a curved conductor. And the pattern width W2 of the magnetic flux passage portion 2 is set to be narrower than the pattern width at which the maximum allowable eddy current loss occurs, and the pattern widths W4 and W5 of the crossover portion 3 pass the magnetic flux. The portion 2 is formed to be wider than the pattern width W2.

  For example, in this embodiment, the pattern width W2 of the magnetic flux passage portion 2 is 0.6 mm, and the pattern width W5 of the crossover main conductor portion 5 of the crossover portion 3 is 1 wider than the pattern width W2 of the magnetic flux passage portion 2. Is set such that the pattern width W4 of the crossover transition conductor portion 4 gradually widens in the range of 0.6 mm to 1.0 mm. Also in this wave-winding disk-type coil, like the heavy-winding disk-type coil, it is possible to reduce the conductor resistance of the conductor pattern 1 as a whole while suppressing the generation of eddy currents in the magnetic flux passage portion 2, and the motor. Efficiency could be improved. In FIG. 4, reference numeral 15 denotes a flange portion of the insulating substrate, and 16, 17, 18, and 19 are drawn out to a flange portion 15 at the end where three conductor coils are formed by connecting each conductor pattern 1 '. These are lands that form a start terminal pattern and an end terminal pattern, which respectively indicate a coil pattern winding start clockwise land, a coil pattern winding start counterclockwise land, a coil pattern winding end clockwise clockwise land, and a coil pattern winding end clockwise clockwise land. Reference numeral 20 denotes a drawing portion of each land.

  Also, the heavyly wound conductor pattern 1 is not limited to the winding method of the embodiment shown in FIG. 1, and various winding methods can be adopted. For example, as shown in FIG. 5, it is formed at the end of the innermost conductor by spirally winding from the outside to the inside starting from a position near the outer peripheral side of the insulating substrate (hereinafter referred to as the outer peripheral side of the substrate). The conductive pattern 1 is electrically connected to the conductive pattern 1 on the back surface through the through-holes 6 for connecting the front and back conductive patterns, and on the reverse side of the insulating substrate 10, the inner peripheral side of the insulating substrate is conversely wound from the inside to the outside. The winding ends at a through-hole land 9 that perforates the in-phase connection through-hole 7 at the end of the outermost conductor formed at a position closer to the substrate (hereinafter referred to as the substrate inner peripheral side). It is good also as a single overlap winding at the end of the circumference side winding. Further, as shown in FIG. 6, a slit is continuously inserted in the center of the line width from the beginning to the end of winding of the conductor pattern except for the through-hole lands 8 and 9 at both ends, and from the magnet N pole to the S pole. It is good also as a layered roll to straddle. Furthermore, as shown in FIG. 7, a lap winding in which two conductor patterns are formed in parallel may be used so that series or parallel connection is possible by wiring of the in-phase connection through hole 7. In the case of the embodiment in FIG. 7, the winding is started from the inner peripheral side of the substrate and is finished to be wound on the inner peripheral side of the substrate, but is not particularly limited to this. It is also possible to start winding from the outer peripheral side of the substrate and to start winding from the outer peripheral side of the substrate and to finish winding on the outer peripheral side of the substrate. In addition, about the conductor pattern 1 of embodiment shown in FIGS. 5-7, the same code | symbol is attached | subjected about the thing of the same structure as the conductor pattern of FIG. 1, and the detailed description is abbreviate | omitted.

DESCRIPTION OF SYMBOLS 1 Conductor pattern 2 Magnetic flux passage part 3 Crossover part 4 Crossover transition conductor part
5 Crossover main conductor
DESCRIPTION OF SYMBOLS 10 Insulation board | substrate 12 Magnetic flux passage locus W2 Pattern width of a magnetic flux passage part W4 Pattern width of a crossover transition conductor part W5 Pattern width of a crossover main conductor part

Claims (6)

By making a conductor pattern formed on the front and back surfaces of the disk-shaped annular insulating substrate conductive through through-hole connection, a coil of at least one circuit is formed between the conductor pattern on the front surface of the annular insulating substrate and the conductor pattern on the rear surface. In the disk-type coil configured to be configured, the pattern width of one coil is divided into a magnetic flux passage portion that passes through the magnetic field and a crossover portion outside the magnetic flux passage portion,
The pattern width of the magnetic flux passage part is a pattern width that is narrower than the pattern width at which the maximum allowable eddy current loss occurs,
The disk-type coil, wherein a pattern width of the crossover portion is wider than a pattern width of the magnetic flux passage portion. 2. The disk type coil according to claim 1, wherein a pattern width of the magnetic flux passing portion is within 0.8 mm. 3. The disk type coil according to claim 1, further comprising a through hole for stacking that makes the terminal end or start terminal of the conductor pattern conductive with the start terminal or end terminal of the conductor pattern of another disk type coil. The disk-type coil according to any one of claims 1 to 3, wherein the conductor pattern forms one coil with multiple windings. The conductor pattern includes a magnetic flux passage portion linearly extending in a radial direction perpendicular to the magnetic flux passage locus at the magnetic flux passage portion, and a crossover portion outside the magnetic flux passage portion, and the crossover portion is A crossover main conductor portion disposed in a circumferential direction along the magnetic flux passage locus, and a crossover transition conductor portion connecting the magnetic flux passage portion and the crossover main conductor portion with a curved conductor. Item 5. The disk type coil according to Item 4. A rotating electric machine comprising the disk type coil according to any one of claims 1 to 5 as an armature or a stator coil.

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