JP2013005481A - Concentrated winding coil and rotary electric machine stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concentrated winding coil used in a rotary electric machine stator capable of ensuring insulation quality to teeth and insulation quality between adjacent coils in a same slot.SOLUTION: A concentrated winding coil 10 comprises: an inner peripheral coil 20 which uses a coil element wire 12 of an insulation film flat wire including a thick film side A in which thickness dof an insulation film 16 is thicker than thickness dof insulation films of other sides, and in which the coil is wound to have the thick film side A in an inner peripheral side of winding; an outer peripheral coil 22 in which the coil is wound continuously with the inner peripheral coil 20 and wound to have the thick film side A in an outer peripheral side of winding; and a connection 21 which connects the inner peripheral coil 20 with the outer peripheral coil 22 and reverses the thick film side A between the inner peripheral side and the outer peripheral side by twisting the insulation film flat wire by 180 degrees around an extension direction.

Description

  The present invention relates to a concentrated winding coil and a rotating electric machine stator, and more particularly to a concentrated winding coil for winding a rectangular wire with an insulating film and a rotating electric machine stator using the same.

  A coil is wound around the stator of the rotating electric machine. Specifically, a plurality of slots are provided in the stator, and a conductive wire is wound around a protruding portion called a tooth between adjacent slots. By winding a large number of conductive wires between the limited slots, the coil space factor is improved and a small rotating electrical machine is obtained.

  For example, in Patent Document 1, in a rotating electrical machine for a vehicle having a concentrated winding type stator, a flat wire is wound further from the root side to the tip side of the tooth, folded back at the tip side, and the tooth A two-layer concentrated winding coil is described which winds one more layer from the tip side toward the base side. Here, it is disclosed that the winding of the second layer is pushed down and pushed up against the root side of the tooth so that the coil end does not protrude at the end of the tip side.

  Patent Document 2 describes that, in a rectangular wire for a coil, a self-bonding layer is provided only on the side surface on the teeth side, so that the space factor is improved while ensuring insulation.

  As a technique related to the present invention, in Patent Document 3, in the electrical equipment winding, the base conductors are arranged in six columns to form a first conductor group, and similarly, the base conductors are arranged in six columns to form a second conductor. In each base conductor, the insulating layer on the opposite surface facing the other conductor group is made thicker than the other part. In order to do this, it is disclosed that the powder resin adhered to all parts of the conductor by the electrostatic flow method is collected and baked at a specific part by twisting the conductor.

JP 2006-20490 A JP 2009-225507 A JP 60-234439 A

  In Patent Document 2, when increasing the space factor by reducing the thickness of the flat wire self-bonding layer as much as possible, the self-bonding layer is thickened only on the side surface of the teeth, and insulation between the teeth is obtained. Is secured. By the way, although both sides of the teeth are slots, since one slot is divided by two adjacent teeth, two coils are accommodated in one slot. In the method of Patent Document 2, the side surface opposite to the teeth side of one coil faces the side surface opposite to the teeth side of the other coil. The thickness of the self-bonding layer on the opposite side surface is as follows. thin. Therefore, it is difficult to ensure insulation between adjacent coils in one slot.

  The objective of this invention is providing the concentrated winding coil which can ensure the insulation with respect to teeth, and the insulation between adjacent coils in the same slot, and a rotary electric machine stator using this.

  The concentrated winding coil according to the present invention uses a rectangular wire with an insulating film having a thick film side in which the thickness of the insulating film is set larger than the thickness of the insulating film on the other side, and is thick on the inner peripheral side of the winding. The inner circumference thick film coil portion wound so that the membrane side comes, and the outer circumference wound continuously with the inner circumference thick film coil portion so that the thick membrane side comes to the outer circumference side of the winding A thick film coil part, and a connection part between an inner peripheral thick film coil part and an outer peripheral thick film coil part, wherein a rectangular wire with insulation coating is twisted 180 degrees around the extending direction so that the thick film side is on the inner peripheral side And a connecting portion that is switched between the outer peripheral side and the outer peripheral side.

  The concentrated winding coil according to the present invention is a multi-layer winding coil in which the next winding is performed on the outer peripheral side of one winding to form a multi-layered winding, and the innermost innermost winding It is preferable to wind the thick film coil portion and wind the outer peripheral thick film coil portion on the outermost periphery side.

  A rotating electrical machine stator according to the present invention is a rotating electrical machine stator including a concentrated winding coil that winds a plurality of layers of rectangular wires around one tooth, and the concentrated winding coil has an insulating film thickness on the other side. Using a rectangular wire with an insulating film having a thick film side set to be thicker than the thickness of the insulating film, an inner peripheral thick film coil portion wound so that the thick film side comes to the inner peripheral side of the winding, An outer peripheral thick film coil portion wound continuously with the inner peripheral thick film coil portion and wound so that the thick film side comes to the outer peripheral side of the winding, and the inner peripheral thick film coil portion and the outer peripheral thick film coil portion And a connecting portion in which the thick film side is switched between the inner peripheral side and the outer peripheral side by twisting the rectangular wire with insulation coating by 180 degrees around the extending direction. To do.

  Further, in the rotating electrical machine stator according to the present invention, a multi-layer wound coil is used in which the next winding is performed on the outer peripheral side of one winding to form a multi-layered winding, It is preferable that the inner thick film coil portion is wound on the innermost circumferential side facing the wall surface of the outer peripheral thick film, and the outer peripheral thick film coil portion is wound on the outermost circumferential side facing the adjacent concentrated winding coil wound around the adjacent teeth.

  With the above configuration, the concentrated winding coil is continuously wound around the inner peripheral thick film coil portion and the inner peripheral thick film coil portion wound so that the thick film side comes to the inner peripheral side of the winding. The outer peripheral thick film coil portion wound so that the thick film side comes to the outer peripheral side of the turn, and at the connecting portion between the inner peripheral thick film coil portion and the outer peripheral thick film coil portion, the rectangular wire is drawn Twisting around 180 degrees, the thick film side is switched between the inner peripheral side and the outer peripheral side.

  Thus, the inner peripheral thick film coil portion and the outer peripheral thick film coil portion can be formed with one concentrated winding coil. By using this concentrated winding coil for a rotating electrical machine stator, an inner peripheral thick film coil portion is disposed on the tooth side, and an outer peripheral thick winding coil portion is disposed on the side facing the other adjacent concentrated winding coil in the same slot. can do. Thereby, the insulation with respect to teeth and the insulation between adjacent coils in the same slot can be secured.

  Further, in the concentrated winding coil, a multi-layer winding coil which is overlapped on the outer peripheral side of one winding to perform the next winding to form a multi-layer overlapping winding, and the inner peripheral thick film coil portion on the innermost peripheral side The outer peripheral thick film coil portion is wound on the outermost peripheral side. By using such a multi-layer winding coil for a rotating electric machine stator, an inner peripheral thick film coil portion is arranged on the tooth side, and an outer peripheral thick coil on the side facing the other concentrated winding coil adjacent in the same slot. Parts can be arranged. Thereby, the insulation with respect to teeth and the insulation between adjacent coils in the same slot can be secured.

It is a perspective view of the concentrated winding coil of embodiment which concerns on this invention. It is the figure which looked at the concentrated winding coil of FIG. 1 from the coil end part. In the concentrated winding coil of embodiment which concerns on this invention, it is a figure which shows a mode that a rectangular wire is twisted 180 degree | times at a coil end so that a thick film side may come to an inner peripheral side and a thick film side may come to an outer peripheral side. . It is sectional drawing of the rectangular wire used for the concentrated winding coil of embodiment which concerns on this invention. It is a figure which shows arrangement | positioning of a concentrated winding coil in the rotary electric machine stator of embodiment which concerns on this invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In the following, a two-layer winding coil in which the outer peripheral side coil is overlapped and wound on the outer side of the inner peripheral coil will be described as the concentrated winding coil, but it may be a coil that overlaps two or more layers.

  In the following description, a rectangular wire having a rectangular cross section is described as the coil wire, but the cross sectional shape may not be a strict rectangle but may have an appropriate roundness. The insulating film may be a resin that is not softened by heating, or may be a self-bonding resin. The thickness of the insulating film on one side is the same as the thickness of the insulating film on one side and the thickness of the insulating film on the other side is different. Is thicker than the thickness of the insulating film on the other side, and the thickness of the insulating film on the other side may be different.

  In the following description, a side having an insulating film thicker than the insulating film on the other side is defined as a thick film side A, and a side facing the thick film side A in a rectangular cross section is defined as a thin film side B. It will be described that the direction in which the thick film side A faces and the direction in which the thin film side B faces are switched. For the replacement, the coil wire is twisted, and the twisting position is described as one side of the two coil ends. However, depending on the case, the twisting position may be any of the two coil ends.

  The shape, number of turns, film thickness, and the like shown below are examples for explanation, and can be appropriately changed according to the specification of the concentrated winding coil and the specification of the rotating electric machine stator.

  Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted. In the description in the text, the symbols described before are used as necessary.

FIG. 1 is a perspective view of the concentrated winding coil 10. The coil wire 12 used in the concentrated winding coil 10 is a rectangular wire having a rectangular cross section and a structure in which an insulating film 16 is provided on the outer periphery of the conducting wire 14. The conducting wire 14 is a metal wire made of electric copper or the like. The insulating film 16 is a resin layer that is not softened by heating. The thickness of the insulating film 16 is not the same on each side. That is, the thickness d ₂ of the insulating film on one side of the four sides in the rectangular cross section of the rectangular wire that is the coil wire 12 is set to be thicker than the thickness d ₁ of the insulating film on the other side. The

  Here, the side having the thick insulating film is referred to as the thick film side A, and the side having the insulating film thinner than the thickness of the thick film side on the opposite side of the thick film side A in the rectangular cross section is the thin film side B. I will call it. The thick film side A and the thin film side B are short sides of a rectangular cross-sectional shape, and the length of the side is shorter than the lengths of the sides in the other two sides. In FIG. 1, the thick film side A is hatched.

  The concentrated winding coil 10 is formed by winding a plurality of turns while bending the coil wire 12, and the side to be bent is the short side of the rectangular cross section. That is, the inner peripheral side of the winding of the concentrated winding coil 10 is the thick film side A or the thin film side B, and the outer peripheral side of the winding is also the thick film side A or the thin film side B. The concentrated winding coil is a two-layer winding coil in which the outer peripheral side coil 22 is overlapped and wound outside the inner peripheral side coil 20. The inner circumference side coil 20 and the outer circumference side coil 22 are names for distinguishing between the windings that are the layers on the inner circumference side and the windings that are the layers on the outer circumference side of the windings that are continuously overlapped. There are only two independent coils. This is a name indicating a portion of one concentrated winding coil 10.

  Here, in the concentrated winding coil 10 of FIG. 1, the inner peripheral side of the winding of the inner peripheral coil 20 is the thick film side A, and the outer peripheral side of the winding is the thin film side B. On the other hand, the outer peripheral side of the winding of the outer peripheral side coil 22 is the thick film side A, and the inner peripheral side of the winding is the thin film side B. As described above, the concentrated winding coil 10 includes the inner thick film coil portion in which the insulating film 16 on the inner peripheral side of the winding is thick and the thick outer peripheral film in which the insulating film 16 on the outer peripheral side of the winding is thick. A coil part is included.

  Since the inner peripheral thick film coil portion and the outer peripheral thick film coil portion are formed by winding a single coil element wire 12, the thick film side A and the thin film side B are directed somewhere in the winding. The direction will be changed. For the replacement, the coil wire 12 is twisted 180 degrees around its extending direction. The portion to be twisted is a portion where the inner peripheral thick film coil portion and the outer peripheral thick film coil portion are interchanged, and is a connection portion 21 between the inner peripheral thick film coil portion and the outer peripheral thick film coil portion. The connection portion 21 is provided at the coil end of the concentrated winding coil 10.

  The coil end is a portion where the coil winding protrudes from the stator core when the concentrated winding coil 10 is mounted on the stator core of the rotating electrical machine. In the example of the concentrated winding coil 10 in FIG. 1, the winding of the coil has an elongated shape in the vertical direction of the paper surface, and the upper and lower ends of the paper surface of this winding are coil ends. The connecting portion 21 is provided at the coil end at the upper end of the winding paper. In FIG. 1, the coil end provided with the connecting portion 21 is shown as CE.

  FIG. 2 is a view corresponding to a plan view of the coil end CE of FIG. 1 as viewed from above the paper surface. The concentrated winding coil 10 is a two-layer winding, each of which is 7 and a half turns. FIG. 2 shows a state of the connection portion 21 in the coil end CE. Here, as in FIG. 1, the thick film side A is hatched. The thin film side B is not hatched. In the coil end CE, while the coil wire 12 is being wound, the state where the thick film side A is the outer peripheral side is switched to the state where the thin film side B is the outer peripheral side, or conversely, the thin film side B is the outer peripheral side. Although it is shown that the thick film side A is changed to the outer peripheral side from the state of the side, the connecting portion 21 is the place of the replacement. By this replacement, the direction in which the thick film side A faces is changed by 180 degrees around the direction in which the coil wire 12 extends at the beginning and end of winding of the concentrated winding coil 10.

  FIG. 3 is a diagram for explaining that the coil strand 12 is twisted 180 degrees around the extending direction in the connecting portion 21 and the thick film side A is switched between the inner peripheral side and the outer peripheral side. Here, in FIG. 2, one turn of each of the two-layer windings located on the uppermost side of the drawing is shown as an example. 3 is a schematic view corresponding to the front view of the concentrated winding coil 10, and the upper view is an enlarged schematic view of the connection portion 21 at the coil end CE. Here, the side corresponding to the thick film side A of the coil wire 12 to be wound is hatched so that it can be easily understood that the thick film side A is replaced by the connecting portion.

  As shown in FIG. 3, the coil wire 12 is wound once as a layer on the outer peripheral side from the start of the outer peripheral side of the concentrated winding coil 10 and is twisted 180 degrees at the connection portion 21 of the coil end CE. Is replaced on the inner peripheral side by the outer peripheral side of the winding. From there, the coil wire 12 is wound once as a layer on the inner peripheral side of the concentrated winding coil 10. As described above, in the connection portion 21, the coil strand 12 is twisted 180 degrees around its extending direction, that is, around the axis, so that the inner peripheral layer of the concentrated winding coil 10 has an inner peripheral insulating film. A thick inner peripheral thick film coil part is formed, and an outer peripheral layer is an outer peripheral thick film coil part having a thick outer peripheral insulating film.

FIG. 4 is a more detailed cross-sectional view of the coil wire 12 shown in an enlarged view in FIG. As shown here, the coil wire 12 is a flat wire in which an insulating film 16 is coated on the outer periphery of a conducting wire 14 having a rectangular cross-sectional shape. The insulating film 16 has a thickness d _{2 for} one of the short sides of the four sides of the rectangular shape and a thickness d ₁ for the other three sides. The thickness d ₂ is set from the viewpoint of ensuring sufficient electrical insulation between the coil wire 12 that is a flat wire and the object that contacts or faces each other. The thickness d ₁ is set to a minimum thickness necessary for protecting the surface of the coil wire 12 which is a flat wire. By setting d ₁ small, the space factor when the concentrated winding coil 10 is arranged on the stator of the rotating electrical machine can be improved.

  An object that the coil wire 12 contacts or faces is a tooth around which the coil wire 12 is wound when the concentrated winding coil 10 is disposed in the stator of the rotating electrical machine. Further, in the stator of the rotating electrical machine, in addition to the concentrated winding coil 10, a concentrated winding coil wound around an adjacent tooth is disposed in the slot where the concentrated winding coil 10 is disposed. Therefore, this adjacent concentrated winding coil is also an object to which the coil wire 12 of the concentrated winding coil 10 contacts or faces.

  In order to ensure insulation against these objects, the coil wire 12 needs to be arranged so that the thick film sides A face each other. Therefore, in the concentrated winding coil 10, the winding layer on the inner circumferential side facing the teeth is arranged on the outer circumferential side facing the adjacent concentrated winding coil so that the thick film side A comes to the inner circumferential side. As for, the thick film side A comes to the outer peripheral side.

  FIG. 5 is a diagram illustrating a stator core 32 of the rotating electrical machine 30 to which the concentrated winding coil 10 is applied. Here, teeth 34 and slots 36 of the stator core 32 are shown. The concentrated winding coil 10 has seven layers each of two layers of the inner peripheral coil 20 and the outer peripheral coil 22, and the arrangement of each winding of each layer is shown in a sectional view of the coil wire 12. The cross-sectional view of the coil wire 12 is schematically shown in FIG. 4, and the thick portion of the insulating film 16 is hatched. That is, the side corresponding to the place colored black is the thick film side A.

  As a partial enlarged view of one slot 36, the inner peripheral coil 20 facing the teeth 34, the outer peripheral coil 22 wound around the outer side, and the outer peripheral coil 22 of the adjacent concentrated winding coil 11 are shown. . In this enlarged view, these arrangement states are shown using a cross-sectional view of the coil wire 12 of FIG.

  As shown in FIG. 5, the inner peripheral coil 20 facing the teeth 34 has the thick film side A on the teeth 34 side. The outer peripheral coil 22 facing the adjacent concentrated winding coil 11 is on the concentrated winding coil 11 side where the thick film side A is adjacent. As described above with reference to FIG. 3, the concentrated winding coil 10 can secure insulation against the teeth 34 by replacing the direction in which the thick film side A faces with the inner peripheral coil 20 and the outer peripheral coil 22. Insulation with respect to the adjacent concentrated winding coil 11 disposed in the same slot 36 can be ensured.

  The concentrated winding coil and the rotating electrical machine stator using the same according to the present invention can be used for a rotating electrical machine mounted on a vehicle.

  10, 11 Concentrated winding coil, 12 Coil wire, 14 Conductor, 16 Insulating film, 20 Inner peripheral coil (inner peripheral thick film coil part), 21 Connection part, 22 Outer peripheral coil (outer peripheral thick film coil part), 30 Rotating electric machine, 32 stator core, 34 teeth, 36 slots.

Claims (4)

Using a rectangular wire with an insulating film having a thick film side where the thickness of the insulating film is set to be thicker than the thickness of the insulating film on the other side, the film is wound so that the thick film side comes to the inner circumference side of the winding Inner thick film coil portion,
The outer peripheral thick film coil portion wound continuously with the inner peripheral thick film coil portion and wound so that the thick film side comes to the outer peripheral side of the winding,
It is a connection between the inner peripheral thick film coil part and the outer peripheral thick film coil part, and the thick film side is between the inner peripheral side and the outer peripheral side by twisting a rectangular wire with insulation coating 180 degrees around the extending direction. The connection part to be replaced with,
The concentrated winding coil characterized by including. The concentrated winding coil according to claim 1,
A multi-layer winding coil which is overlapped on the outer peripheral side of one winding and the next winding is a multi-layer winding,
Wind the inner peripheral thick film coil part on the innermost side,
A concentrated winding coil characterized by winding an outer peripheral thick film coil portion on the outermost peripheral side. A rotating electrical machine stator including a concentrated winding coil that winds a plurality of layers of rectangular wires around one tooth,
Concentrated winding coil
Using a rectangular wire with an insulating film having a thick film side where the thickness of the insulating film is set to be thicker than the thickness of the insulating film on the other side, the film is wound so that the thick film side comes to the inner circumference side of the winding Inner thick film coil portion,
The outer peripheral thick film coil portion wound continuously with the inner peripheral thick film coil portion and wound so that the thick film side comes to the outer peripheral side of the winding,
It is a connection between the inner peripheral thick film coil part and the outer peripheral thick film coil part, and the thick film side is between the inner peripheral side and the outer peripheral side by twisting a rectangular wire with insulation coating 180 degrees around the extending direction. The connection part to be replaced with,
A rotating electric machine stator comprising: In the rotating electrical machine stator according to claim 3,
Using a multi-layer winding coil that is overlapped on the outer peripheral side of one winding to make the next winding and a multi-layer winding,
Multi-layer coil
Wind the inner peripheral thick film coil part on the innermost peripheral side facing the teeth wall,
A rotating electric machine stator, wherein an outer peripheral thick film coil portion is wound on an outermost peripheral side facing an adjacent concentrated winding coil wound around adjacent teeth.

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