JP2011115008A - Magnetic core with coil, and armature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic core with coil around which magnetic core the coil is wound so that a cross point is placed on a prescribed side face of the magnetic core, without applying excessive tensile force to the coil. <P>SOLUTION: According to the magnetic core with the coil (12), the coil has a nonperpendicular portion (12h) whose coil direction (P1) is not perpendicular to a pillar axis (P2) direction only on an approximately flat surface (10b). The coil is wound into a coil, in line from one end side (P-) toward the other end side (P+) of the pillar axis (P2) direction of the magnetic core to form one coil layer (12P1). A next coil layer (12P2) is formed on the one coil layer, such that the next coil layer is coiled in line from the other end side (P+) toward the one end side (P-) so that a cross point (K) of the next coil layer, and the one coil layer is placed on the substantially flat surface and at a place other than the approximately flat surface, is located in grooves 12a between the coils of the one coil layer. The width W of the substantially flat surface is set so that the width W satisfies formula 1: W+D≥D/tanθ+(n-1)Dsinθ, and where 0°<θ<90°, with respect to D the diameter of the coil and θ the angle between the coil direction (P1) and a surface perpendicular to the pillar axis (P2). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a magnetic core with windings and an armature suitable for use in an axial gap type rotating electrical machine.

  When winding the windings around the magnetic core, in order to increase the space factor, the windings are arranged in a stacked manner (ie, each winding in the second layer or more is placed in a groove between the lower windings). It is desirable to do. However, at the intersection where the winding intersects with the lower layer winding (cross point), the winding factor cannot be aligned in a stacked manner, so that the space factor deteriorates.

  For example, in an axial gap type rotating electrical machine, when such a cross point exists on the side surface on the circumferential side of the magnetic core (that is, the side surface facing the adjacent magnetic core), the winding is stacked on the side surface. As a result, the number of winding turns (also referred to as the number of turns) is reduced, resulting in a problem that the performance of the rotating electrical machine is degraded. In addition, when such a cross point is present on the outer peripheral side of the magnetic core (that is, the radially outer side with respect to the central axis of the rotating electrical machine), the number of turns is reduced compared to the case where the windings are stacked on the side. Alternatively, the magnetic core is further arranged on the inner peripheral side, which causes a problem that the rotational output of the rotating electrical machine is reduced. For this reason, it is desirable that the cross points be arranged so as to fit on the inner peripheral side surface of the magnetic core.

  However, since the cross point tends to shift to the opposite side to the winding direction (winding direction) of the winding, it is difficult to fit the cross point on one side. In particular, in an axial gap type rotating electrical machine, in order to increase the space factor of the winding, the magnetic core is formed in a substantially trapezoidal column shape when viewed from the central axis direction of the rotating electrical machine, and the side surface corresponding to the short side of the approximately trapezoidal shape is inside. In many cases, a plurality of magnetic cores are arranged in an annular shape so as to be directed to the circumferential side (that is, radially inside with respect to the central axis of the rotating electrical machine). In this case, the inner peripheral side surface of the magnetic core is a side surface corresponding to the substantially trapezoidal short side and the width is narrowed. Therefore, it is more difficult to fit the cross point on the inner peripheral side surface of the magnetic core. .

  Note that there is Patent Document 1 as a prior art document relating to storing the cross point on the inner peripheral side surface.

JP 2008-31319 A

  For this reason, conventionally, by applying excessive tension to the winding (tensile enough to extend the winding), the cross point is forced to fit on the inner peripheral side surface of the magnetic core. For this reason, there is a problem that an excessive load is applied to the winding, and the winding is damaged, or the sectional area is reduced and the winding resistance is increased.

  An object of the present invention is to solve the above-described problems, and the winding is performed so that the cross point is accommodated on a predetermined side surface of the magnetic core without applying excessive tension to the winding. An object of the present invention is to provide a wound core and an armature in which wires are laminated and wound by aligned winding.

  In order to solve the above problems, a first aspect of the present invention includes a columnar magnetic core (10) having a substantially rectangular substantially flat surface (10a) on a predetermined side surface of the outer peripheral surface (10b); And a winding (12) wound around the outer peripheral surface, the winding having a winding direction (P1) only on the substantially flat surface and the magnetic core column. It has a non-orthogonal portion (12h) that is not orthogonal to the direction of the axis (P2) and is aligned and wound from one end side (P−) to the other end side (P +) in the column axis direction of the magnetic core. One winding layer (12P1) is formed, and the intersection (K) with the winding of the one winding layer is accommodated on the substantially flat surface on the one winding layer, and other than the substantially flat surface. Then, the winding is aligned and wound from the other end to the one end so as to be disposed in the groove 12a between the windings of the one winding layer. Forming a layer (12P2), wherein the number of turns of the one winding layer is n, the width of the substantially flat surface in the direction perpendicular to the column axis direction is W, the diameter of the winding is D, The angle in the winding direction of the non-orthogonal portion with respect to the plane (S1) perpendicular to the column axis is θ, and the width W is set so as to satisfy Equation 1.

  A second aspect of the present invention is the magnetic core with winding according to the first aspect, wherein the magnetic core (10) is formed in a substantially trapezoidal columnar shape, and the substantially flat surface (10a) It is a side surface corresponding to the short side of the substantially trapezoidal columnar substantially trapezoid.

  A third aspect of the present invention is the core with a winding according to the first or second aspect, wherein the outer peripheral surface (10b) has the substantially flat surface (10a) and another side surface (10k1) adjacent thereto. , 10k2), when the edge relaxation structure is applied to the corner (10d), the width (W) of the substantially flat surface is the width when the edge relaxation structure is not applied. Is.

  According to a fourth aspect of the present invention, there is provided an armature using the magnetic core with winding according to the second aspect, wherein the armature yoke (20) is provided on one side (20b) of the armature yoke. A plurality of annularly arranged magnetic cores (1) in which the column axis (P2) direction is perpendicular to the one surface and the substantially flat surface (10a) is directed to the inner peripheral side. It is to be prepared.

  According to the first aspect of the present invention, the intersection (K) of the winding (12) is formed on the substantially flat surface (10a), which is the side surface on the predetermined side, without applying excessive tension to the winding (12). The winding (12) can be laminated and wound on the outer periphery of the magnetic core (10) by aligned winding so as to fit.

  According to the second aspect of the present invention, the winding (12) is connected to the magnetic core (10) so that the intersection (K) of the winding (12) is accommodated in the side surface (10a) corresponding to the short side of the substantially trapezoid. Can be aligned and wound around

  According to the third aspect of the present invention, the width (W) of the substantially flat surface (10a) can be accurately determined even when the corner portion (10d) of the magnetic core (10) is provided with an edge relaxation structure. .

  According to the fourth aspect of the present invention, the intersection (K) of the windings (12) is accommodated in the inner peripheral side surface (10a) of the magnetic core (10), and therefore the outer peripheral side surface of the magnetic core (10). The thickness of the entire winding layer in (10e) can be reduced, and accordingly, the magnetic core (10) can be further arranged on the outer peripheral side, and the output of the rotating electrical machine can be improved. Further, since the winding intersection (K) is accommodated on the inner peripheral side surface (10a) of the magnetic core (10), the thickness of the entire winding layer on the peripheral side surface (10k) of the magnetic core (10). Thus, the winding (12) can be wound many times and the output of the rotating electrical machine can be improved.

It is a perspective view of magnetic core 1 with a winding concerning a 1st embodiment. It is sectional drawing in a surface perpendicular | vertical to the column axis P2 of 10 A of magnetic core main bodies. It is the side view which looked at the magnetic core 1 with a coil | winding from the substantially flat surface 10a side. It is a figure explaining the state by which the coil | winding 12 of the 1st round of the 1st layer was wound by the magnetic core 10. FIG. It is a figure explaining the state by which the winding 12 of the 2nd round of the 1st layer was wound around the magnetic core 10. FIG. It is a disassembled perspective view of the armature 30 which concerns on 2nd Embodiment. 4 is a plan view of the armature 30 as viewed from the side of the winding core 1 of the rotation axis Q. FIG.

<First Embodiment>
A winding core 1 according to this embodiment is used for an armature for an axial gap type rotating electrical machine. As shown in FIG. 1, the core 10 and the outer periphery of the core 10 (that is, the core). 10 and a winding 12 wound around an outer periphery of a column axis P2 (described later).

  As shown in FIG. 1, the magnetic core 10 is formed in a columnar shape (substantially trapezoidal columnar shape here) having a substantially rectangular substantially flat surface 10 a on a predetermined side surface of the outer peripheral surface 10 b. 1 is a column axis of the magnetic core 10, the symbol P3 is a horizontal axis perpendicular to the column axis P2 and parallel to the substantially flat surface 10a, and the symbol P4 is orthogonal to the column axis P2. The vertical axis is orthogonal to the substantially flat surface 10a.

  The magnetic core 10 includes a magnetic core body 10A, a first overhang portion 10B, and a second overhang portion 10C.

  As shown in FIG. 1, the magnetic core body 10A is formed in a substantially prismatic shape (here, a substantially trapezoidal column), and a side surface corresponding to the short side of the substantially trapezoid is a substantially flat surface 10a. As shown in FIG. 2, the corners 10d and 10f of the outer peripheral surface (ie, the outer peripheral surface around the column axis P2) 10b1 of the magnetic core body 10A are provided with an edge relaxation structure (for example, chamfering) and have, for example, roundness. Is formed.

  As shown in FIG. 1, the first overhanging portion 10B is provided on one side P + of the magnetic core body 10A in the direction of the column axis P2, and the outer peripheral side of the magnetic core body 10A (that is, the outer peripheral side around the column axis P2). ). More specifically, the first overhanging portion 10B is formed, for example, in a substantially trapezoidal plate shape, and its short side is directed to the same side as the short side of the substantially trapezoidal shape of the magnetic core body 10A. The side is provided so as to face the same side as the substantially trapezoidal long side of the magnetic core body 10A. The first projecting portion 10B has, for example, a width in the direction of the vertical axis P4 (that is, a width between the short side and the long side) of the same length as the width of the magnetic core body 10A in the direction of the vertical axis P4. The edge portions 10g on both sides in the direction of the horizontal axis P3 are formed so as to protrude from the magnetic core body 10A.

  The second projecting portion 10C is provided on the other side P- of the magnetic core body 10A in the direction of the column axis P2, and is formed so as to project to the outer peripheral side of the magnetic core body 10A. More specifically, the second overhanging portion 10C is formed in, for example, a substantially rectangular plate shape, and the length of a pair of sides parallel to the vertical axis P4 direction in the substantially rectangular shape (that is, the length in the vertical axis P4 direction). Is a length substantially equal to the length of the magnetic core body 10A in the direction of the vertical axis P4, and the length of a pair of sides parallel to the direction of the horizontal axis P3 in the substantially rectangular shape (that is, the length in the direction of the horizontal axis P3). Is formed to have substantially the same length as the length of the substantially trapezoidal long side of the magnetic core body 10A.

  Here, a convex portion 10i is provided on the surface 10j on the other side P− of the second overhanging portion 10C in the column axis P2 direction (that is, the surface opposite to the magnetic core body 10A side) 10j. The convex portion 10i is formed in a rectangular parallelepiped shape, and is provided in the center of the surface 10j in the direction of the horizontal axis P3 so that the longitudinal direction thereof is along the direction of the vertical axis P4. The convex portion 10i has a length W2 in the horizontal axis P3 direction shorter than a length W1 in the horizontal axis P3 direction of the second overhang portion 10C, and a length in the vertical axis P4 direction of the second overhang portion. The portion 10C is formed in a rectangular parallelepiped shape having substantially the same length as the length in the horizontal axis P3 direction.

  The magnetic core 10 is formed in a substantially trapezoidal column shape. In this regard, the magnetic core 10 has a substantially trapezoidal columnar magnetic core body 10A, and first and second tensions projecting to the outer peripheral side of the magnetic core body 10A on both sides P + and P− in the direction of the cylinder axis P2. Although the protruding portions 10B and 10C are provided, here, the magnetic core body 10A occupying most of the main portion is substantially trapezoidal columnar, so the whole including the first and second protruding portions 10B and 10C is also substantially omitted. Considered trapezoidal columnar.

  The magnetic core 10 is made of a magnetic material. Here, the magnetic core 10 is formed by laminating a plurality of magnetic plates 10r in the direction of the vertical axis P4 as shown in FIG. Accordingly, the cross-sectional shape of the surface of the magnetic core 10 perpendicular to the column axis P2 is stepped for each plate thickness of the magnetic plate.

  The winding 12 is, for example, a round wire having a circular cross section. The winding 12 is preferably a self-bonding wire, but is not essential. As shown in FIG. 3, the winding 12 is not provided with an insulating layer on the outer peripheral surface 10 b 1 of the magnetic core body 10 </ b> A so as not to apply excessive tension (that is, tension enough to cause the winding 12 to be excessively stretched). Are wound in an aligned manner (that is, wound in a parallel arrangement with no gaps), and cross points (that is, intersections where the second and subsequent windings 12 intersect with the lower layer (magnetic core body 10A side) windings 12). ) Stacked and wound so that K is within the substantially flat surface 10a side. In FIG. 3, each winding 12 in the first layer is illustrated by a solid line, the second winding 12 is illustrated by a dotted line, and the third and subsequent windings 12 are not illustrated.

  Here, referring to FIG. 2, the winding 12 has a position 10t near the end on the substantially flat surface 10a side of the side P-side in the column cylinder axis P2 direction on the side surface 10k1 of the outer peripheral surface 10b1. One layer is wound in the order of the side surface 10k1, the side surface 10k3, the side surface 10k2, and the substantially flat surface 10a (ie, clockwise in FIG. 2) toward one side P + in the direction of the cylinder axis P2 (toward the front of the page). The eyes are aligned and wound.

  More specifically, as shown in FIG. 3, in the first layer, the winding 12 has a winding direction P1 in the direction of the cylinder axis P2 on the side surfaces 10k1 to 10k3 (see FIG. 2) other than the substantially flat surface 10a. The other side in the cylinder axis P2 direction on the outer peripheral surface 10b1 of the magnetic core body 10A so as to have a non-orthogonal portion 12h not orthogonal to the cylinder axis P2 direction on the substantially flat surface 10a so as to shift to the next round. The winding is aligned from P− to one side P + to form a first winding layer 12P1. The number of turns of the first winding layer 12P1 is set to n, and the length of the outer peripheral surface 10b1 of the magnetic core body 10A in the direction of the cylinder axis P2 is set to nD.

  When the first winding 12 of the winding layer 12P1 (hereinafter, the kth winding 12 is referred to as a winding 12-k) is wound, as shown in FIG. 1 are all non-orthogonal portions 12h on the substantially flat surface 10a. Further, when the winding 12-2 of the second turn is wound by the aligned winding, the winding 12-2 of the second turn is wound in the first turn so as to be in close contact with the winding 12-1 of the first turn. Since the coil 12-1 is pressed toward the 12-1 side, the winding 12-1 in the first turn is moved in the direction of the cylinder axis P2 by the pressure F from the winding 12-2 in the second turn as shown in FIG. It is pushed to the other side P-. Therefore, the upstream portion 12i in the winding direction P1 on the substantially flat surface 10a of the winding 12-1 is orthogonal to the cylinder axis P2. In general, the winding 12- (k + 1) of the (k + 1) th turn is pressed and wound to the winding 12-k side of the kth turn so as to be in close contact with the winding 12-k of the kth turn. Therefore, the winding 12-k of the k-th turn is pushed to the other side P- in the direction of the cylinder axis P2 by the pressure F from the winding 12- (k + 1) of the (k + 1) -th turn, so that the portion 12i of the winding 12-k Is orthogonal to the cylinder axis P2.

  In the state where the winding layer 12P1 is formed, the winding 12-k in the k-th turn of the winding layer 12P1 uses the resultant force F of the pressure from the winding 12 in each turn after the k + 1-th turn as the k + 1-th turn. Received from winding 12- (k + 1). Therefore, the winding 12-k receives a larger pressure F from the winding 12- (k + 1) as it is closer to the first turn. As the pressure F received by the winding 12-k from the winding 12- (k + 1) increases, the portion 12i of the winding 12-k becomes longer. Accordingly, the portion 12i becomes longer as the winding 12 on the first turn side becomes longer, and the portion 12i becomes shorter as the turn 12 on the last turn (nth turn) side, and the (n-1) th turn. In the winding 12- (n-1), the portion 12i is eliminated.

  The non-orthogonal portion 12h of the winding 12-n on the final circumference of the first winding layer 12P1 has a winding direction P1 of the first winding 12- of the winding layer 12P2 on the second layer. 1 is not aligned and wound around the non-orthogonal portion 12h of the other windings 12-1,..., 12- (n-2) of the first winding layer 12P1. Similarly, the non-orthogonal portion 12h of the winding 12 on the final circumference of the second and subsequent winding layers 12P2,... Is not aligned with the non-orthogonal portion 12h of the other winding 12 of the same winding layer. .

  Further, as shown in FIG. 5, the winding 12-k of the kth turn of the winding layer 12P1 is pressed against the winding 12- (k-1) side of the k-1th turn. The pressure Fa from the winding 12- (k-1) of the eye is received, and the pressure Fa is pushed to one side P + in the direction of the cylinder axis P2. Therefore, the downstream portion 12j (see FIG. 3) on the substantially flat surface 10a in the winding 12-k is orthogonal to the cylinder axis P2. Therefore, similarly to the above, in the state where the winding layer 12P1 is formed, the portion 12j becomes shorter in the winding 12 on the first turn side, and the portion 12j disappears in the winding 12 in the first turn. The portion 12i becomes longer as the winding 12 around the final circumference. Note that the pressure Fa received by the winding 12- (n-1) in the (n-1) th turn from the winding 12- (n-2) in the n-2th turn considers the symmetry in the direction of the cylinder axis P2. Then, since the first winding 12-1 has the same pressure F received from the second winding 12-2, the (n-1) th winding 12- (n-1) portion 12j has the same length as the length of the portion 12i of the winding 12-1 in the first turn.

  In the state in which the winding layer 12P1 is formed in this way, a portion H1 including the non-orthogonal portions 12h of the windings 12 other than the final circumference in the winding layer 12P1 is a plane orthogonal to the direction of the cylinder axis P2 (for example, A substantially rectangular shape that is inclined by a predetermined angle θ with respect to the surface S1 of the second projecting portion 10C on the one side P + in the cylinder axis P2 direction is formed. The predetermined angle θ is an angle formed by the winding direction P1 of the non-orthogonal portion 12h of each winding 12 of the winding layer 12P1 and the surface S1, and is an angle in a range of 0 ° <θ <90 °.

  In this embodiment, the projection component H1a (= D / tan θ ° + (n−1) Dsinθ) onto the surface S1 of the substantially rectangular H1 has a width W and a winding in a direction perpendicular to the direction of the cylinder axis P2 of the substantially flat surface 10a. It is set to be equal to or less than the sum (W + D) of twice the radius D / 2 of the line 12 (that is, the relationship of Formula 1 is established) (this relationship is called the first relationship).

  That is, in this embodiment, when the first winding layer 12P1 is formed so that excessive tension is not applied, the width W of the substantially flat surface 10a and the winding 12 are set so that the relationship of Formula 1 is satisfied. The diameter D is set. In a state where the relationship of Expression 1 is satisfied, the winding 12 is not excessively tensioned, and the non-orthogonal portion 12h of each winding 12 of the first winding layer 12P1 fits on the substantially flat surface 10a.

  Here, as shown in FIG. 2, the edge relaxation structure is applied to the corner 10d which is the boundary between the substantially flat surface 10a and the other side surfaces 10k1 and 10k2 adjacent to the outer peripheral surface 10b1 of the magnetic core body 10A. In this case, the width W of the substantially flat surface 10a is the width of the substantially flat surface 10a when the edge relaxation structure is not applied.

  In the second layer, the winding 12 is arranged in the groove 12a formed by the depression between the windings 12 in the first layer on the side surfaces 10k1 to 10k3 other than the substantially flat surface 10a. As in the case of the eye, the winding direction P1 is orthogonal to the direction of the cylinder axis P2, and on the substantially flat surface 10a, the winding direction P1 shifts to the next round, so A second winding layer 12P2 is formed by aligning winding from one side P + to the other side P− in the cylinder axis P2 direction on the outer peripheral surface 10b1 of the magnetic core body 10A so as to have a non-orthogonal portion 12h that is not orthogonal. ing.

  In this state, the portion including the non-orthogonal portion 12h of each winding 12 other than the final circumference in the second winding layer 12P2 is predetermined with respect to the cylinder axis P2 in the same manner as the first rectangle H1. It becomes a substantially rectangular shape (not shown) inclined by an angle (angle between the non-orthogonal portion 12h of each winding 12 other than the last circumference in the second winding layer 12P2 and the surface S1). Then, the projection component H2a onto the substantially rectangular surface S1 is limited so as to be within the sum (W + D + 2d1) as shown in FIG. 3 (this is referred to as a second relationship). In addition, the code | symbol d1 in FIG. 3 is the space | interval between each winding layer 12P1, 12P2 on each side surface 10k1, 10k3.

  In the second relationship, since the projection component H2a is limited to a sum (W + D + 2d1) wider than the sum (W + D) in the first relationship, the second relationship is the first relationship. Below will be charged automatically. Note that d1 is √3 · D / 2.

  On the side surfaces 10k1 to 10k3 other than the substantially flat surface 10a, the windings 12 of the winding layers 12P1 and 12P2 are parallel to each other and do not intersect with each other. Each intersection point K between each winding 12 and each winding 12 in the second layer falls within the substantially flat surface 10a. That is, the intersection K is limited so as not to protrude on the side surfaces 10k1 to 10k3 other than the substantially flat surface 10a.

  Similarly, the odd-numbered layers after the third layer are the same as in the first layer and in the groove 12a between the lower-layer windings 12 and the first and second windings 12 at both ends of the lower layer. The windings are aligned so as to be arranged in the grooves 12b and 12c between the overhanging portions 10B and 10C, and the even layers after the fourth layer are between the lower windings 12 as in the case of the second layer. The coils are aligned and wound so as to be disposed in the groove 12a, and are wound in a predetermined number of layers. In this way, when the first relationship (ie, Expression 1) is established, excessive tension is not applied to the winding 12, and the windings 12 of the winding layers 12P1, 12P2,... Are parallel to each other on the side surfaces 10k1 to 10k3. Since the non-orthogonal portion 12h of the winding 12 of each winding layer 12P1, 12P2,... Is accommodated on the substantially flat surface 10a, each winding layer 12P1, 12P2,. All the intersections K in between fit within the substantially flat surface 10a.

  Here, the case where the length of the magnetic core body 10A in the direction of the column axis P2 is n times the diameter D of the winding 12 (that is, nD) has been described. In this case, the number of turns of the first, second, third,... Winding layers 12P1, 12P2, 12P3,... Becomes n, n-1, n,. Since the number of turns of the subsequent winding layers is equal to or less than the number of turns of the first winding layer, if the first winding layer satisfies the relationship of Equation 1, each of the first winding layers If the non-orthogonal portion 12h of the winding 12 is fitted on the substantially flat surface 10a, the non-orthogonal portion 12h of each winding 12 of each winding layer after the second layer is also fitted on the substantially flat surface 10a. Therefore, the crossing point K of the winding 12 between the winding layers falls within the substantially flat surface 10a. When the length of the magnetic core body 10A in the direction of the column axis P2 is (n−½) times the diameter D of the winding 12 (that is, (n + ½) D), the first layer, the second layer, The number of turns of each of the winding layers 12P1, 12P2, 12P3,... Of the third layer,... Is the same as n, n, n,. Since the number of turns of each winding layer after the second layer is equal to or less than the number of turns of the first winding layer, if the first winding layer satisfies the relationship of Equation 1, each winding after the second layer The non-orthogonal portion 12h of each winding 12 of the layer also fits on the substantially flat surface 10a. Therefore, the intersection K of the winding 12 between the winding layers fits on the substantially flat surface 10a.

  According to the magnetic core 1 with the winding configured as described above, the width W of the substantially flat surface 10a is set so as to satisfy the expression 1, so that each winding can be performed without applying excessive tension to the winding 12. The winding 12 can be laminated and wound on the outer peripheral surface 10b of the magnetic core 10 by aligned winding so that the intersection K of the winding 12 between the wire layers 12P1, 12P2,.

  When the magnetic core 10 is formed in a substantially trapezoidal columnar shape, the winding 12 is arranged so that the intersection K of the winding 12 between the winding layers is accommodated on the side surface 10a corresponding to the short side of the substantially trapezoid in the magnetic core 10. The outer peripheral surface 10b of the magnetic core 10 can be laminated and wound by aligned winding.

  Further, since the width W of the substantially flat surface 10a when the edge relaxation structure is applied to the corner portion 10d of the magnetic core 10, the width of the substantially flat surface when the edge relaxation structure is not applied is adopted. Even when the corner 10d of the core 10 is provided with an edge relaxation structure, the width W of the substantially flat surface 10a can be accurately determined.

Second Embodiment
The armature 30 according to this embodiment is an armature for an axial gap type rotating electrical machine using the winding core 1 according to the first embodiment. As shown in FIGS. 6 and 7, the armature 30 includes a magnetic core 1 with a winding and a yoke 20. 6 is the rotation axis of the armature 30, Qr is the radial direction with respect to the rotation axis Q, and Qφ is the circumferential direction with respect to the rotation axis Q.

  The wound core 1 is configured in the same manner as the wound core 1 of the first embodiment. That is, in the magnetic core 1 with windings, the outer periphery of the magnetic core 10 is arranged such that the intersection K of the windings 12 between the winding layers falls within the substantially rectangular surface 10a of the magnetic core 10 (that is, the side surface corresponding to the short side of the substantially trapezoid). A winding 12 is laminated and wound on the surface by aligned winding.

  The yoke 20 includes a yoke body 20h and a magnetic core fixing plate 20g disposed on the lower surface of the yoke body 20h.

  The yoke body 20h is formed in an annular plate shape from a magnetic material. Here, the yoke body 20h is formed in an annular plate shape, for example, by laminating a plurality of magnetic plates 24 in the direction of the rotation axis Q. A plurality of fitting portions 22d into which the second overhanging portion 10C of the magnetic core 10 is fitted are formed in the yoke body 20h. Each fitting portion 22d is formed radially along the radial direction Qr so as to penetrate the upper and lower surfaces of the yoke body 20h and to have an opening 22c on the inner peripheral side surface of the yoke body 20h.

  The magnetic core fixing plate 20g is formed in an annular plate shape having a diameter substantially the same as that of the yoke body 20h, for example, by a nonmagnetic metal such as stainless steel. The magnetic core fixing plate 20g is formed with a fitting hole 20m into which the convex portion 17 of the magnetic core 1 with winding is fitted so as to penetrate the upper and lower surfaces thereof.

  In this armature 30, the magnetic core 10 is disposed on the yoke 20 as follows. That is, the column axis P2 direction of each magnetic core 10 is perpendicular to the one surface 20b of the yoke 20 from the upper side to each fitting portion 22d of the yoke 20, and the substantially flat surface 10a of each magnetic core 10 is in the radial direction Qr. Of the magnetic core 10 so that the outer surface 10C1 on the outer side in the radial direction Qr of the second overhanging portion 10C contacts the inner side surface 22da on the outer side in the radial direction Qr of the fitting portion 22d. 10C of 2nd overhang | projection parts are fitted by the fitting part 22d. In this fitted state, the convex portion 10 i of the magnetic core 10 is fitted in the fitting hole 20 m of the yoke 20. And the contact location of the convex part 10i and the fitting hole 20m is mutually fixed by welding from the lower surface side of the magnetic core fixing plate 20g. In this way, as shown in FIG. 7, the plurality of magnetic cores 10 are annularly arranged on the main surface 20 b of the yoke 20. The yoke body 20h opens the radial inner side of the fitting portion 22d, thereby interrupting the path of eddy current generated around the magnetic core 10 due to the change of the magnetic flux passing through the magnetic core 10, and the winding 12 Is a space for guiding the start of winding around the magnetic core 10.

  According to the armature 30 configured as described above, the intersection point K of the winding 12 between the winding layers of the core 1 with each winding is within the side surface 10a on the inner peripheral side of the magnetic core 10, so The thickness of the entire winding layer on the outer peripheral side surface 10k3 can be reduced, and the magnetic core 10 can be further arranged on the outer peripheral side, and the output of the rotating electric machine using this armature 30 can be improved.

  Further, since the intersection point K of the windings 12 is accommodated on the side surface 10a on the inner peripheral side of the magnetic core 10, the thickness of the entire winding layer on the side surfaces 10k1 and 10k2 on the circumferential direction Qφ side of the magnetic core 10 can be reduced. Since many windings 12 can be wound, the output of the rotating electrical machine using this armature 30 can be improved.

  In the present embodiment, the first overhanging portion 10B is opposed to the rotor and the second overhanging portion 10C is fitted to the yoke 20, but both sides may be opposed to the rotor. Moreover, the 1st and 2nd overhang | projection parts 10B and 10C and the convex-shaped part 10i are also arbitrary. When there is no overhanging portion, the overhanging portion may be formed of an insulator.

DESCRIPTION OF SYMBOLS 1 Magnetic core with winding 10 Magnetic core 10a Almost flat surface 10b Outer peripheral surface of winding 10b1 Outer peripheral surface of winding main body 10d Corner 12 Winding 12a Groove 12P1, 12P2 Winding layer 20 Yoke W Width of substantially flat surface θ winding Angle between line direction and plane perpendicular to cylinder axis D Winding diameter P1 Winding direction P2 Core axis of magnetic core K Crossing point

Claims (4)

A columnar magnetic core (10) having a substantially rectangular substantially flat surface (10a) on a predetermined side surface of the outer peripheral surface (10b);
A winding (12) having a circular cross section and wound around the outer peripheral surface;
With
The winding has a non-orthogonal portion (12h) whose winding direction (P1) is only on the substantially flat surface and is not orthogonal to the column axis (P2) direction of the magnetic core, and in the magnetic core One winding layer (12P1) is formed by being aligned and wound from one end side (P−) to the other end side (P +) in the column axis direction, and the substantially flat surface is formed on the one winding layer. The crossing point (K) with the winding of the one winding layer is accommodated on the surface, and the other side is disposed in the groove 12a between the windings of the one winding layer except for the substantially flat surface. The next winding layer (12P2) is formed by aligning winding from one end toward the one end,
The number of turns of the one winding layer is n, the width of the substantially flat surface in the direction orthogonal to the column axis direction is W, the diameter of the winding is D, and the surface perpendicular to the column axis (S1 The angle of the winding direction of the non-orthogonal portion of each winding other than the last circumference in the one winding layer with respect to
The width W is set so as to satisfy Formula 1;

The magnetic core with winding according to claim 1,
The magnetic core (10) is formed in a substantially trapezoidal columnar shape,
The said substantially flat surface (10a) is a side surface corresponding to the short side of the said substantially trapezoid pillar-shaped substantially trapezoid, The magnetic core with a coil | winding characterized by the above-mentioned. The magnetic core with winding according to claim 1 or 2,
In the case where the edge relaxation structure is applied to the corner (10d) which is the boundary between the substantially flat surface (10a) and the other side surface (10k1, 10k2) adjacent thereto on the outer peripheral surface (10b),
The magnetic core with windings, wherein the width (W) of the substantially flat surface is a width when the edge relaxation structure is not applied. An armature using the magnetic core with winding according to claim 2,
An armature yoke (20);
The armature yoke is provided with a plurality of annular surfaces on one side (20b) of which the column axis (P2) direction is perpendicular to the one side and the substantially flat surface (10a) is directed to the inner peripheral side. A wound core (1),
An armature comprising:

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