JP5071067B2 - Armature - Google Patents

Description

  The present invention relates to an armature, and more particularly to an armature in which a plurality of windings connected in parallel to each other are wound around one tooth.

  Generally, an armature includes a plurality of teeth arranged in an annular shape and a winding wound around the teeth. The wire diameter is appropriately designed according to the specifications of the armature. For example, when a large operating current flows, the wire diameter is designed to be a large value. However, if the wire diameter is large, it is difficult to wind the winding around the teeth, resulting in a decrease in the space factor.

  As a method for solving such a problem, there is a method of reducing the wire diameter of the winding by connecting the winding in parallel. For example, when nine teeth are provided in a three-phase armature, there is a demand to connect two windings in parallel in each phase. In order to satisfy such a requirement, two windings are wound around one tooth, and these are connected in parallel to each other.

  Patent Document 1 describes an armature in which, for example, two windings connected in parallel to each other are wound around one tooth. More specifically, the starting points of the windings are connected to each other, and the end points of the windings are connected to each other. An insulator as an insulating means is provided between the windings.

  Patent Documents 2 and 3 are disclosed as techniques related to the present invention.

Japanese Patent Laid-Open No. 11-27886 JP 2004-20846 A JP 2006-254524 A

  However, in the technique described in Patent Document 1, since the potential difference is large in the conductive wire contacting between the two windings, it is necessary to provide an insulating means between the two windings.

  Therefore, an object of the present invention is to provide an armature that can omit or simplify an insulating means between windings.

A first aspect of the armature according to the present invention has a magnetic body (1) extending along a predetermined axis (P) and both ends, and is wound around the magnetic body around the axis. , The first to Nth windings (2, 3) connected in parallel to each other, and the k + 1th (k is 1 to N-1) windings from the opposite side to the magnetic body. A starting point (31) which is wound around the k-th winding and is one end located on the magnetic body side of both ends of the k + 1-th winding (3) is the k-th winding (2). Are connected to an end point (21), which is one end opposite to the magnetic material side, and a pair of the magnetic material (1) and the first to Nth windings (2, 3). There are a plurality of (10), which are annularly arranged around a predetermined rotation axis, and in at least any two adjacent sets among the plurality of sets. End point (32) between the windings of the N (3) is connected to the neutral point (N).

A second aspect of the armature according to the present invention includes a magnetic body (1) extending along a predetermined axis (P),
The first to Nth windings (2, 3) each having both ends and wound around the magnetic body around the axis and connected in parallel to each other, the k + 1th (k being 1 to 1) The N-1) winding is wound around the k-th winding from the opposite side to the magnetic body, and is located on the magnetic body side of both ends of the k + 1-th winding (3). The start point (31) which is one end is connected to the end point (21) which is one end located opposite to the magnetic body side among both ends of the k-th winding (2), and the magnetic body (1) and There are a plurality of sets (10) of the first to Nth windings (2, 3), which are arranged in a ring around a predetermined rotation axis, and at least adjacent to each other among the plurality of sets. In any two sets, the end points (32) of the Nth winding (3) are connected to the neutral point (N).

A third aspect of the armature according to the present invention is the armature according to the first or second aspect, wherein the starting point (31) of the k + 1-th winding (3) is a base point and the axis is The winding direction of the (k + 1) th winding viewed from the first direction along the kth winding viewed from the first direction is based on the starting point (21) of the kth winding (2). This is opposite to the winding direction of the winding .

A fourth aspect of the armature according to the present invention is the armature according to the third aspect, wherein each of the first to N-1 windings is wound around the magnetic body by at least two layers. The starting point (31) of the k + 1 winding (3) and the end point (22) of the k winding (2) are in a direction along the axis (P). Located on the same side of the magnetic body (1) .

A fifth aspect of the armature according to the present invention is the armature according to any one of the first to fourth aspects, wherein at least the first to N-1th windings (2, 3). Are wound around the entire length of the magnetic body (1) in the direction along the axis (P) .

A sixth aspect of the armature according to the present invention is the armature according to any one of the first to fifth aspects, wherein a starting point of the first to Nth windings (2, 3) ( 21 and 31) and the end points (22 and 32) of the first to Nth windings are on the same side with respect to the magnetic body (1) in the direction along the axis (P). Is located.

A seventh aspect of the armature according to the present invention is the armature according to any one of the first to sixth aspects, wherein a starting point of the first to Nth windings (2, 3) ( 21, 31) and each of the lead lines connected to the first to Nth end points (22, 32) connect the first to Nth windings to the axis (P). The areas projected in the direction along the line do not intersect each other.

An eighth aspect of the armature according to the present invention is the armature according to any one of the first to seventh aspects, wherein the magnetic body (1) and the first to Nth windings ( 2 and 3), there are a plurality of sets (10) arranged in a ring around a predetermined rotation axis, and the magnetic body (1) includes the first to Nth windings (2, 2). a body (11) 3) is wound, said shaft (projection of the winding of the at one end of said body in the direction along the P) first through said N-th in a direction along the axis (P) provided to avoid some of the regions have a wide collar portion (12) and from the main body in the circumferential direction around the rotation axis.

According to a ninth aspect of the armature of the present invention, the armature according to any one of the first to eighth aspects is an axial gap type.

A tenth aspect of the armature according to the present invention is the armature according to the ninth aspect, and is a set of the magnetic body (1) and the first to Nth windings (2, 3). There are a plurality of (10), which are annularly arranged around a predetermined rotation axis, and the starting points (21, 31) of the first to N-th windings (2, 3) are located with respect to the magnetic body. And located on the opposite side of the rotating shaft.

According to the first aspect of the armature according to the present invention, when a plurality of windings are connected in parallel to one magnetic body, the adjacent first to Nth windings are adjacent to each other. The potential difference between each of the conducting wires can be reduced, so that the insulating means provided between them can be omitted or simplified. Furthermore, the potential difference between the two sets can be reduced, so that the insulating means provided between the two sets can be omitted or simplified.

According to the second aspect of the armature according to the present invention, when a plurality of windings are connected in parallel to one magnetic body, the adjacent first to Nth windings are adjacent to each other. The potential difference between each of the conducting wires can be reduced, so that the insulating means provided between them can be omitted or simplified. Furthermore, since the potential difference between the adjacent first windings can be reduced through the magnetic body, even if a yoke that magnetically couples the magnetic bodies is employed, it is possible to connect to other windings via the magnetic body. Electric leakage is less likely to occur .

According to the third aspect of the armature according to the present invention, when viewed from the first direction , the directions of the currents flowing through the first to Nth windings can be the same direction .

According to the fourth aspect of the armature according to the present invention, since the first to Nth windings are wound in two or more layers, the windings in adjacent layers intersect each other. There is a portion that is wound around, and a so-called cross point is generated. The end point of the (k + 1) th winding and the starting point of the kth winding are located on the same side in the direction along the axis, and the winding direction of the (k + 1) th winding and the winding direction of the kth winding Since these are opposite to each other, the k + 1th winding can be wound in contact with the wiring of the kth winding without contacting the wiring of the layer farthest from the magnetic body. Therefore, the layer on the k + 1th winding side of the kth winding and the layer on the kth winding side of the k + 1th winding can realize a so-called volume on the entire circumference around the axis. Therefore, the space factor can be improved .

According to the fifth aspect of the armature of the present invention, the space factor can be improved.

According to the sixth aspect of the armature according to the present invention, since the start point and the end point are on the same side, these connections can be easily performed.

According to the seventh aspect of the armature according to the present invention, since the lead wires do not cross each other alternately, the length occupied by the first to Nth windings in the direction along the axis can be reduced. It is possible to prevent a decrease in the space factor due to the lead line.

According to the eighth aspect of the armature of the present invention, the winding collapse can be prevented by the flange portion. Further, by drawing out the starting point and the ending point of the first to Nth windings from the surface of the magnetic body that intersects the radial direction around the rotation axis, it is possible to easily draw out the lead wire.

According to the ninth aspect of the armature according to the present invention, since the aligned winding is easy, the armature according to any one of the first to ninth aspects can be easily applied to the axial gap type armature. .

According to the tenth aspect of the armature according to the present invention, since the cross point is normally formed at the position of the starting point, the cross point can be formed on the outer peripheral side of the magnetic body as viewed from the rotation axis. Since the length of the magnetic body in the circumferential direction on the outer peripheral side is longer than that on the inner peripheral side, a cross point can be easily formed.

Embodiment.
FIG. 1 is a conceptual exploded perspective view showing a part of an armature according to an embodiment as an example. The armature includes a tooth 1 and windings 2 and 3. In addition, although the teeth 1 and the windings 2 and 3 are shown separately with respect to a predetermined axis P, the windings 2 and 3 are actually wound around the teeth 1 as described later. Although the present armature will be described as an axial gap type armature, the present invention is not limited to this and may be a radial gap type armature.

  The teeth 1 are made of, for example, a magnetic material (for example, iron) having a high magnetic permeability, and include a main body portion 11 and a flange portion 12. The flange 12 is provided at one end of the main body 11 in the direction D along the predetermined axis P. The flange portion 12 has a width wider than the main body portion 11 in one direction perpendicular to the predetermined axis P.

  The winding 2 has both ends, and a predetermined conducting wire is wound around a predetermined axis P around the tooth 1 (more specifically, the main body 11). More specifically, the winding 2 is wound from the starting point side lead wire 21 (hereinafter also referred to as the start point 21) around the teeth 1 in an aligned winding to the end point side lead wire 22 (hereinafter also referred to as the end point 22). Has been pulled out.

  The winding 3 has both ends, and a predetermined conducting wire is wound around the axis P around the axis 1 and wound around the winding 2. More specifically, the winding 3 is wound from the start point side lead wire 31 (hereinafter also referred to as the start point 31) to the winding 2 in an aligned winding, and then to the end point lead wire 32 (hereinafter also referred to as the end point 32). It is pulled out. In FIG. 1, the wound armature windings are drawn together in the drawing. However, the lead lines are shown separately.

  In FIG. 1, one of the sets of the teeth 1 and the windings 2 and 3 is illustrated, but in actuality, these sets are arranged in a ring around a predetermined rotation axis. Further, a pair of teeth 1 and windings 2 and 3 are fixed to, for example, a back yoke as shown in a drawing to be referred to later. The number of windings to be wound is not limited to two and may be two or more. Here, a mode in which the windings 2 and 3 are wound around one tooth 1 will be mainly described.

  The windings 2 and 3 are connected in parallel to each other, and the end point 22 of the winding 2 and the start point 31 of the winding 3 are electrically connected. FIG. 2 shows the connection relationship between the windings 2 and 3. The end point 22 of the winding 2 and the start point 31 of the winding 3 are connected to the power supply terminal V, for example. A starting point 21 of the winding 2 and an end point 32 of the winding 3 are connected to a neutral point terminal N, for example. Thus, the windings 2 and 3 are connected in parallel to each other.

  Since the end point 22 and the start point 31 are connected, the potential difference in the adjacent conductors between the windings 2 and 3 can be reduced, so that the insulating means provided between the windings 2 and 3 is omitted. Or it can be simplified. In order to deepen the understanding, a case where N windings are wound around the tooth 1 will also be described. For example, when the first winding is wound around the tooth 1 and the second to Nth windings are wound around the first to N-1 windings from the opposite side to the tooth 1, respectively, The starting point of the matching k + 1 (k is 1 to N−1) winding and the ending point of the kth winding are connected. As a result, the insulating means provided between the first to Nth windings can be omitted or simplified.

  Referring again to FIG. 1, in view of the direction of the current flowing through the windings 2 and 3, the winding direction of the winding 2 with respect to the starting point 21 of the winding 2 when viewed from the direction D is It is desirable that the direction of winding 3 is opposite to the winding direction of winding 3 with reference to starting point 31 of winding 3 as viewed from D. For example, in FIG. 1, the winding 2 is wound in a clockwise direction with a starting point 21 as a base point when viewed from the direction D. The winding 3 is wound counterclockwise from the starting point 31 as viewed from the direction D.

  Since the current flows from the power supply terminal V to the neutral point terminal N, the current flows from the end point 22 to the start point 21 for the winding 2. On the other hand, a current flows from the start point 31 to the end point 32 for the winding 3. Therefore, the direction of the current flowing through the winding 2 when viewed from the direction D is counterclockwise, and the direction of the current flowing through the winding 3 when viewed from the direction D is also counterclockwise. Therefore, the directions of magnetic flux generated by the windings 2 and 3 can be made the same direction.

  In FIG. 1, the start point 21 and end point 22 of the winding 2 and the start point 31 and end point 32 of the winding 3 are on the same side with respect to the tooth 1 in the direction D (more specifically, on the flange 12 side). Although it is located, it is not necessarily limited to this. The start points and end points of the windings 2 and 3 may be on either side, and the windings 2 and 3 are connected in parallel while connecting the end point 22 and the start point 31, and the windings 2 and 3 viewed from the direction D are connected. The winding direction may be opposite to each other.

  However, it is desirable that the start points 21 and 31 and the end points 22 and 32 are located on the same side with respect to the tooth 1 in the direction D. This is because the interconnection of the start point and the end point can be facilitated.

  FIG. 3 conceptually shows the side as viewed from the arrow A in FIG. FIG. 4 schematically shows a cross section in which the windings are stacked. 3 also shows the back yoke 4 on which the teeth 1 are arranged. Among the windings 3, the winding 3a of the outermost layer (hereinafter referred to as the uppermost layer) as viewed from the teeth 1, and the winding of the uppermost layer. A winding 3b of a layer closer to the tooth 1 by one layer than the line 3a is also shown.

  The windings 2 and 3 are wound in two or more layers by aligned winding over the entire length of the main body 11 in the direction D, respectively. In addition, windings 2 and 3 are wound in a direction perpendicular to the axis P on a surface excluding a surface (a surface viewed from an arrow C in FIG. 1) where a cross point described later is formed (for example, FIG. 3). See arrow E). Further, in windings of different layers (for example, windings 3a and 3b), the other winding (for example, winding 3a) is inserted into a recess formed between one winding (for example, winding 3b). Yes. Thereby, the windings 2 and 3 can be wound by the stacking as shown in FIG. 4, and the space factor can be improved. In FIG. 4, the space between the lines connecting the centers of the conductive wires along the direction D is shown as an interlayer pitch p <b> 1 on this surface. Further, the diameter of the conducting wire is represented by d, and the centers of the three neighboring conducting wires are connected by a solid line.

  FIG. 5 conceptually shows the side as viewed from the arrow C in FIG. Since there are lead lines connected to the starting points 21 and 31 on this surface, the positions of both ends of the windings 2 and 3 on this surface (see the hatched portions in FIG. 5) are perpendicular to the axis P. Is shifted in the direction D by its own wire diameter d. That is, the windings 2 and 3 are inclined with respect to the direction D. In general, the conductive wire is folded back along the axis P at the end of the main body 11 on this surface, and is repeatedly wound around the main body 11 to form a plurality of layers of windings (for example, the windings 3a and 3b). Is formed. That is, a cross point where windings of different layers intersect each other is formed on the surface of the tooth 1 viewed from the arrow C.

  FIG. 6 schematically shows a cross section where a cross point is formed. In FIG. 6, the space between the lines connecting the centers of the conductive wires along the direction D is shown as an interlayer pitch p <b> 2 on this surface.

  In the surface where the cross point is formed, the pitch p2 is larger than the pitch p1 in the surface where the cross point is not formed. More specifically, the pitch p2 is substantially equal to the wire diameter d (see FIG. 6). On the other hand, the pitch p1 is √3 / 2 · d (see FIG. 4). Therefore, the space factor of the surface where the cross point is formed is lower than the surface where the cross point is not formed (the surface on which the windings are stacked). Therefore, it is desired to improve the space factor also in the surface where the cross point is formed.

  Therefore, the end point 22 of the winding 2 and the start point 31 of the winding 3 are set to the same side with respect to the tooth 1 in the direction D while the winding directions of the windings 2 and 3 viewed from the direction D are opposite to each other. Position. In addition, in FIG. 1, the aspect in which the end point 22 and the start point 31 are located in the collar part 12 side with respect to the teeth 1 is illustrated.

  As a result, the lowermost layer (winding 3) in the direction opposite to the direction in which the uppermost layer of the winding 2 is wound along the axis P and the direction in which the uppermost layer is wound around the axis P, respectively. The innermost layer as viewed from the tooth 1) can be wound, and no cross point is generated between the uppermost layer of the winding 2 and the lowermost layer of the winding 3. In addition, since the direction in which the winding 2 is wound around the axis P and the direction in which the winding 3 is wound around the axis P are different, the generation direction of the magnetic flux can be made uniform as described above. .

  As a more specific example, FIG. 7 conceptually shows a side view of the uppermost layer of the winding 2 as viewed from the arrow C in FIG. A layer closer to the teeth 1 than the uppermost layer of the winding 2 is indicated by a broken line. FIG. 8 shows a state of starting winding of the lowermost layer of the winding 3 as viewed from the arrow C in FIG. The winding 3 is wound in the direction opposite to the winding 2 with the starting point 31 as a base point when viewed from the direction D. Therefore, as shown in FIG. 8, the lowermost winding 3c of the winding 3 can be fitted into the recess between the uppermost windings 2a of the winding 2. Therefore, the uppermost winding 2a of the winding 2 and the lowermost winding 3a of the winding 3 can be stacked on the surface where the cross point is formed on the teeth 1 side of the uppermost layer of the winding 2. it can.

  FIG. 9 conceptually shows a BB cross section in FIG. In FIG. 9, in order to distinguish the windings 2 and 3, the winding 3 is indicated by a bold line, and the connection relationship between the windings 2 and 3 is indicated by a broken line. As shown in FIG. 9, the windings 2 and 3 including the windings 2 a and 3 c can be wound in piles on other surfaces other than the surface on which the cross point is provided (see the portion indicated by the thick broken line). Therefore, the uppermost winding 2a of the winding 2 and the lowermost winding 3c of the winding 3 can be stacked over the entire circumference, thereby improving the space factor.

  FIG. 10 conceptually shows a part of the armature viewed from the direction D. However, the illustration of the collar portion 12 is omitted. FIG. 10 shows three sets of the teeth 1 and the windings 2 and 3, but actually a plurality of these sets are arranged in the circumferential direction around the rotation axis Q. When the armature is applied to, for example, a three-phase rotating machine, the plurality of sets represent U-phase, V-phase, and W-phase windings, respectively. The above-described power supply terminal V includes three U-phase power supply terminals VU, V-phase power supply terminals VV, and W-phase power supply terminals VW, which are connected to windings representing the U-phase, V-phase, and W-phase, respectively. .

  In the armature having such a configuration, it is desirable that the end point 32 of the winding 3 located on the outermost side when viewed from the tooth 1 is connected to the neutral point terminal N. Thereby, the potential difference between the windings 3 adjacent to each other in the circumferential direction around the rotation axis Q can be reduced. Therefore, the insulating means provided between them can be omitted or simplified.

  Further, it is desirable that the starting point 21 of the winding 2 located on the innermost side when viewed from the tooth 1 is also connected to the neutral point terminal N. By connecting the starting point of the winding 2 located on the innermost side when viewed from the tooth 1 to the neutral point terminal N, in the circumferential direction around the rotation axis Q, between the adjacent windings 2 through the tooth 1. Potential difference can be reduced. Therefore, even if the insulating means provided between the teeth 1 and the windings 2 is omitted or simplified, the leakage between the adjacent windings 2 via the teeth 1 and the back yoke 4 hardly occurs.

  In the case shown in FIG. 10, since the number of windings wound around one tooth 1 is two, the start point 21 of the winding 2 and the end point 32 of the winding 3 are connected to each other. . Therefore, by connecting the end point 32 of the winding 3 to the neutral point terminal N, the starting point 21 of the winding 2 is inevitably connected to the neutral point terminal N. However, for example, when the number of windings wound around the tooth 1 is an odd number, the end point of the winding located on the outermost side with respect to the tooth 1 side and the start point of the winding closest to the tooth 1 Are not connected.

  As a more specific example, FIG. 11 shows a schematic configuration in which a part of an armature in which three windings 2, 3, 5 are wound around a tooth 1 is viewed from a direction D. In FIG. 11, the collar portion 12 is not shown. FIG. 12 schematically shows the connection relationship between the windings 2, 3, and 5 as an electric circuit. In this case, the end point 22 of the adjacent winding 2 and the start point 31 of the winding 3 are connected in one tooth 1, and the end point 32 of the adjacent winding 3 and the start point 51 of the winding 5 are also connected. Thereby, the insulation means provided between the windings 2, 3, and 5 can be omitted or simplified.

  In order to connect the windings 2, 3, 5 in parallel with each other, the starting point 21 of the winding 2 is connected to the end point 32 of the winding 3 and the starting point 51 of the winding 5, and the end point 52 of the winding 5 is wound. Connected to the end point 22 of the line 2 and the start point 31 of the winding 3.

  As described above, when the number of windings wound around the tooth 1 is an odd number, the starting point of the winding closest to the tooth 1 side (for example, the starting point 21 of the winding 2) and the most from the tooth 1 side. The far end of the winding (for example, the end 52 of the winding 5) is not connected to each other. On the other hand, when the number of windings wound around the teeth 1 is an even number, since these can be connected to the neutral point terminal N, the insulation between the teeth 1 adjacent to each other in the circumferential direction around the rotation axis Q is possible. Both the means and the insulating means between adjacent windings in one tooth 1 can be omitted or simplified.

  In the present embodiment, the tooth 1 is described as including the collar portion 12, but the present invention is not necessarily limited thereto. The flange portion 12 functions to prevent the windings 2 and 3 (5) from collapsing, but this may be realized by an insulating means such as an insulator. However, when the flange portion 12 is made of a magnetic material, a field element facing the armature via a predetermined air gap is provided on the flange portion 12 side in a direction parallel to the axis P to constitute a rotating machine. In this case, the permeance coefficient of the permanent magnet of the field element can be improved.

  Further, it is desirable that the flange portion 12 (or the insulator) is provided, for example, avoiding a region where the windings 2 and 3 are projected in the direction along the axis P. Thereby, the start points 21 and 31 and the end points 22 and 32 of the windings 2 and 3 can be easily pulled out from the region without being obstructed by the flange portion 12.

  The starting points 21 and 31 are preferably located on the opposite side of the rotation axis Q with respect to the tooth 1. Usually, since the cross point is formed at the position of the starting point, the cross point can be formed on the outer peripheral side of the tooth 1 as viewed from the rotation axis Q. Since the length of the teeth 1 in the circumferential direction on the outer peripheral side is longer than that on the inner peripheral side, a cross point can be easily formed.

  In addition, it is desirable that the lead lines connected to the start points 21 and 31 and the end points 22 and 32 do not intersect each other in a region where the windings 2 and 3 are projected in the direction along the axis P. Thereby, the length which the coil | windings 2 and 3 occupy in the direction along the axis | shaft P can be reduced, and the fall of the space factor by a leader line can be prevented.

  In this embodiment, the axial gap type armature is described. However, the present invention can also be applied to a radial gap type armature. However, an axial gap type armature can be easily applied to an axial gap type armature because it can easily realize aligned winding. In addition, the winding form is an air-core coil (after winding on the winding core, pulling out the winding core and fitting it into the magnetic body), winding on the bobbin, or winding directly on the magnetic body subjected to insulation treatment. Any winding method may be used, such as a spindle winding for rotating the workpiece and a nozzle winding for winding the nozzle around a fixed workpiece. Furthermore, it is preferable to use a self-bonding wire which is heated to be fixed after winding or while winding. Moreover, you may mold with resin after winding.

It is a notional disassembled perspective view showing one tooth of the armature according to the embodiment. It is a figure which shows the connection relation of a coil | winding. It is a conceptual side view for one tooth among the armatures shown in FIG. It is a schematic diagram which shows the cross section of the coil | winding wound by the stacking. FIG. 2 is a conceptual side view of one tooth of the armature shown in FIG. 1. It is a conceptual schematic diagram which shows the cross section of the coil | winding in which a cross point is formed. 3 is a side view showing the uppermost layer of a winding 2. FIG. It is a figure which shows a mode that the coil | winding 3 is wound around the coil | winding 2. FIG. It is a conceptual sectional view showing a BB section of the armature shown in FIG. It is a notional top view which shows two armature teeth. It is a conceptual top view which shows one tooth among armatures. It is a figure which shows the connection relation of the coil | winding shown in FIG.

Explanation of symbols

1 Teeth 2, 3 and 5 Winding 11 Body 12 Butter 21, 31, 51 Start point 22, 32, 52 End point N Neutral point terminal

Claims (10)

A magnetic body (1) extending along a predetermined axis (P);
1st to Nth windings (2, 3) each having both ends, wound around the magnetic body around the axis, and connected in parallel to each other;
The k + 1th winding (k is 1 to N-1) is wound around the kth winding from the opposite side to the magnetic body,
Of the both ends of the k + 1 winding (3), the starting point (31), which is one end located on the magnetic body side, is opposite to the magnetic body side of the both ends of the k th winding (2). Connected to the end point (21) which is one end located ,
There are a plurality of sets (10) of the magnetic body (1) and the first to N-th windings (2, 3), and they are annularly arranged around a predetermined rotation axis.
The armature in which the end points (32) of the Nth winding (3) are connected to the neutral point (N) in at least any two adjacent sets among the plurality of sets . A magnetic body (1) extending along a predetermined axis (P);
First to Nth windings (2, 3) each having both ends, wound around the magnetic body around the axis, and connected in parallel to each other;
With
The k + 1th winding (k is 1 to N-1) is wound around the kth winding from the opposite side to the magnetic body,
Of the both ends of the k + 1 winding (3), the starting point (31), which is one end located on the magnetic body side, is opposite to the magnetic body side of the both ends of the k th winding (2). Connected to the end point (21) which is one end located,
There are a plurality of sets (10) of the magnetic body (1) and the first to N-th windings (2, 3), and they are annularly arranged around a predetermined rotation axis.
The armature in which the end points (32) of the Nth winding (3) are connected to the neutral point (N) in at least any two adjacent groups among the plurality of sets . Starting from the starting point (31) of the k + 1th winding (3), the winding direction of the k + 1th winding viewed from the first direction along the axis is the kth winding ( 3. The armature according to claim 1 , wherein the armature is opposite to a winding direction of the k-th winding as viewed from the first direction with a starting point (21) of 2) as a base point . Each of the first to N-1th windings is wound around the magnetic body by at least two layers,
The starting point (31) of the k + 1-th winding (3) and the end point (22) of the k-th winding (2) are in the direction along the axis (P), and the magnetic body (1 The armature according to claim 3, which is located on the same side with respect to . The at least one of the first to N-1th windings (2, 3) are aligned and wound over the entire length of the magnetic body (1) in a direction along the axis (P). The armature as described in any one of thru | or 4 . All of the start points (21, 31) of the first to Nth windings (2, 3) and all of the end points (22, 32) of the first to Nth windings are connected to the axis (P The armature according to any one of claims 1 to 5, wherein the armature is located on the same side with respect to the magnetic body (1) in a direction along the direction . Each lead line connected to the start point (21, 31) of the first to Nth windings (2, 3) and each lead line connected to the first to Nth end points (22, 32). The armature according to any one of claims 1 to 6, wherein the armatures are not intersected with each other in a region in which the first to Nth windings are projected in a direction along the axis (P) . There are a plurality of sets (10) of the magnetic body (1) and the first to N-th windings (2, 3), and they are annularly arranged around a predetermined rotation axis.
The magnetic body (1)
A main body (11) around which the first to Nth windings (2, 3) are wound;
The first to Nth windings are provided at one end of the main body in a direction along the axis (P) so as to avoid a part of a region projected in the direction along the axis (P), and the rotation A collar portion (12) wider than the main body in the circumferential direction around the axis;
The a, armature according to any one of claims 1 to 7. The armature according to claim 1, wherein the armature is an axial gap type . There are a plurality of sets (10) of the magnetic body (1) and the first to N-th windings (2, 3), and they are annularly arranged around a predetermined rotation axis.
10. The armature according to claim 9, wherein start points (21, 31) of the first to N-th windings (2, 3) are located on a side opposite to the rotating shaft with respect to the magnetic body. .

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