JP2018143066A - Stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a stator which flows a varnish into a stator slot of a stator core satisfactorily.SOLUTION: A stator according to one embodiment of the present invention is a stator in which a stator cuff support 3 is provided on one end face of an axial direction of a stator core 2. The stator cuff support 3 includes an outer annular portion 3a, a cuff support tooth 3b, an inner annular portion 3c, an outer protrusion 3d, and an inner protrusion 3e. A first concave portion 3g extending in a radial direction of the stator core 2 is formed in the outer protrusion 3d, and a second concave portion 3h that extends in the radial direction of the stator core 2 and is continuous with the first concave portion 3g is formed in the cuff support tooth 3c.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a stator for a rotating electrical machine.

  There is known a stator for a rotating electrical machine in which a segment coil formed by connecting a plurality of conductor segments is wound around a stator core. In such a stator, the segment coil is fixed to the stator core by varnish. Further, in the above-described stator, a stator cuff is provided on the axial end surface of the stator core for the purpose of filling a gap with the segment coil and suppressing the floating of the segment coil.

  Here, FIG. 5 shows the periphery of the cuff satis of the stator cuff provided on the end surface on the side where the connecting portion (anti-lead portion) of the conductor segment in the stator core projects, and FIG. 6 shows the side on which the leg of the conductor segment projects in the stator core. FIG. 3 shows the periphery of the cuff satis of the stator cuff provided on the end face of FIG.

  As shown in FIGS. 5 and 6, each stator cuff 101, 102 has one end connected to the outer annular portions 101a, 102a, outer annular portions 101a, 102a disposed on the yoke of the stator core, and The cuff teeth 101b and 102b disposed on the stator teeth and the inner annular portions 101c and 102c for connecting the other ends of the cuff teeth 101b and 102b are provided.

  Incidentally, the stator cuff 101 further includes an outer protrusion 101d disposed at a position where the outer annular portion 101a intersects with the cuff teeth 101b, and an inner protrusion 101e disposed at a position where the inner annular portion 101c intersects with the cuff teeth 101b. On the outer protruding portion 101d, the connecting portion of the conductor segment disposed on the outermost side in the radial direction of the stator core is placed, and on the inner protruding portion 101e, the conductor segment disposed on the innermost side in the radial direction of the stator core. Are connected.

  Here, the stator cuff of Patent Document 1 has a configuration in which a tapered surface inclined toward the central axis of the stator core is formed on the outer protruding portion, so that the varnish dropped on the outer protruding portion is poured toward the central axis of the stator core. ing.

JP 2006-039712 A

  The stator cuff described in Patent Document 1 can pour the varnish dripped onto the outer protrusion toward the central axis of the stator core, but it is difficult to pour the varnish well into the status lot of the stator core.

  The present invention has been made in view of the above background, and realizes a stator capable of satisfactorily pouring varnish into a status lot of a stator core.

A stator according to an aspect of the present invention is a stator in which a stator cuff is provided on one end face in the axial direction of the stator core,
The stator cuffs are
An outer annular portion disposed on the yoke of the stator core;
One end is connected to the outer annular portion, and cuff teeth disposed on the stator teeth of the stator core;
An inner annular portion connecting the other end of the cuff satice;
An outer protrusion disposed at a position intersecting the cuff satis in the outer annular portion;
An inner protrusion disposed at a position intersecting the cuff satis in the inner annular portion;
With
The outer protrusion is formed with a first recess extending in the radial direction of the stator core,
The cuff teeth are formed with a second recess that extends in the radial direction of the stator core and is continuous with the first recess.
With such a configuration, when the varnish is dropped onto the first recess, the varnish flows on the bottom surface of the first recess toward the central axis of the stator core and reaches the second recess. Then, the varnish is pushed by the subsequently dropped varnish, and is successively drawn into a space surrounded by the second concave portion formed in the radial direction of the stator core and the segment coil, so-called capillary phenomenon, so-called capillary phenomenon. It flows toward the central axis. At this time, the varnish flows along the second recess and overflows from the second recess and flows into the status lot of the stator core. As a result, the varnish can be satisfactorily poured into the status lot of the stator core.

  According to the present invention, the varnish can be satisfactorily poured into the status lot of the stator core.

2 is a perspective view showing a basic configuration of a stator core structure according to Embodiment 1. FIG. It is an external view of the conductor segment which comprises a segment coil. FIG. 3 is a perspective view schematically showing the periphery of the cuff teeth of the stator cuff according to the first embodiment. FIG. 6 is a perspective view schematically showing the periphery of a cuff satief of a stator cuff according to a second embodiment. It is a perspective view which shows the cuff satiety periphery of the stator cuff provided in the end surface of the side in which the connection part of the conductor segment in a common stator core protrudes. It is a perspective view which shows the cuff satisities periphery of the stator cuff provided in the end surface by which the leg part of the conductor segment in a common stator core protrudes.

<Embodiment 1>
Embodiments of the present invention will be described below with reference to the drawings. First, a basic configuration of a stator core structure of a rotating electrical machine according to the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view showing a basic configuration of a stator core structure according to the present embodiment. In FIG. 1, the axial direction of the stator core structure 1 is shown in a state of being oriented in the vertical direction (the vertical direction in FIG. 1). As shown in FIG. 1, the stator core structure 1 includes a stator core 2 and a stator cuff 3.

  The stator core 2 is formed by laminating a plurality of electromagnetic steel plates, which are disk-shaped magnetic materials, in the axial direction. The stator core 2 includes an annular yoke 2a and a plurality of stator teeth 2b projecting radially from a plurality of circumferential positions on the inner peripheral surface of the yoke 2a. A status lot 2c is formed between adjacent stator teeth 2b.

  The stator cuff 3 is made of a nonmagnetic material such as PPS (Poly Phenylene Sulfide), and is provided on one axial end surface of the stator core 2. Although details of the stator cuff 3 will be described later, one end is connected to the outer annular portion 3a disposed on the yoke 2a of the stator core 2 and the outer annular portion 3a, and the cuff teeth disposed on the stator teeth 2b of the stator core 2 are disposed. 3b, an inner annular portion 3c that connects the other end of the cuff satiece 3b, an outer protrusion 3d that is disposed at a position that intersects the cuff satisle 3b in the outer annular portion 3a, and a position that intersects with the cuff satis 3b in the inner annular portion 3c. The inner protrusion 3e is provided. A cuff slot 3f is formed in a space surrounded by the adjacent cuff teeth 3b, the outer annular portion 3a, and the inner annular portion 3c.

  In such a stator core structure 1, although not shown, a segment coil is wound to form a stator. The segment coil includes a plurality of conductor segments. FIG. 2 is an external view of a conductor segment constituting the segment coil. As shown in FIG. 2, the conductor segment 4 is formed by forming a rectangular conductor having a rectangular cross section into a substantially U shape by edgewise bending, and connecting the leg portions 4 a and the leg portions 4 a that are parallel to each other. (Anti-lead portion) 4b is provided. The surface of such a conductor segment 4 is insulated.

  The conductor segments 4 are inserted into two status lots 2 c and cuffer slots 3 f that are separated in the circumferential direction of the stator core 2 in a state of being aligned in the radial direction of the stator core 2. At this time, the connecting portion 4 b of the conductor segment 4 protrudes from one axial end surface of the stator core 2, and the connecting portion 4 b of the conductor segment 4 arranged on the outermost side in the radial direction of the stator core 2 is the outer protruding portion of the stator cuff 3. The connecting portion 4b of the conductor segment 4 placed on 3d and arranged on the innermost side in the radial direction of the stator core 2 is placed on the inner protruding portion 3e of the stator cuff 3 and the connecting portion 4b of the other conductor segment 4 is It is placed on the cuff teeth 3 b of the stator cuff 3.

  On the other hand, the leg portion 4a of the conductor segment 4 protrudes from the other axial end surface of the stator core 2, and the leg portions 4a adjacent to each other in the radial direction of the stator core 2 are twisted in different circumferential directions of the stator core 2. The tip portions from which the insulating coatings of the leg portions 4a adjacent in the radial direction are peeled off are electrically joined.

  Such a segment coil is fixed to the stator core 2 by a varnish poured into the status lot 2c of the stator core 2, as will be described in detail later.

  Next, a specific configuration of the stator cuff 3 of the present embodiment will be described. FIG. 3 is a perspective view schematically showing the vicinity of the cuff teeth of the stator cuff according to the present embodiment. As shown in FIG. 3, the stator cuff 3 of the present embodiment is formed so as to be continuous with the first recess 3g formed in the outer protrusion 3d and extending in the radial direction of the stator core 2, and the first recess 3g. And a second recess 3h extending in the radial direction of the stator core 2. The bottom surface of the first recess 3g is an inclined surface that becomes lower toward the center axis of the stator core 2, and is continuous with the bottom surface of the first recess 3h.

  When varnish is dropped onto the first recess 3g of the outer protrusion 3d of the stator cuff 3 as described above, the varnish flows on the bottom surface of the first recess 3g toward the central axis side of the stator core 2, and the second recess 3h. To reach. Then, the varnish is pushed by the subsequently dropped varnish, and is successively drawn into the space surrounded by the second concave portion 3h formed in the radial direction of the stator core 2 and the segment coil, by a so-called capillary phenomenon. And flows toward the central axis of the stator core 2. At this time, the varnish flows along the second recess 3h, overflows from the second recess 3h, and flows into the status lot 2c of the stator core 2. As a result, the varnish can be satisfactorily poured into the status lot 2 c of the stator core 2. In addition, in FIG. 3, the flow of varnish is shown by the arrow.

<Embodiment 2>
The stator cuff 3 of the first embodiment is configured as a stator cuff provided on the end surface of the stator core 2 on the side where the connecting portion 4b of the conductor segment 4 protrudes, but on the end surface of the stator core 2 on the side where the leg portion 4a of the conductive segment protrudes. The stator cuff provided can be implemented in substantially the same manner.

  FIG. 4 is a perspective view schematically showing the periphery of the cuff teeth of the stator cuff according to the present embodiment, which is provided on the end face of the stator core on the side where the leg portions of the conductive segments protrude. As shown in FIG. 4, the stator cuff 13 is configured substantially the same as the stator cuff 3 of the first embodiment, and includes an outer annular portion 13a, a cuff satice 13b, and an inner annular portion 13c. The protrusion is omitted. A recess 13d extending in the radial direction of the stator core 2 is formed in the cuff satice 13b.

  With such a configuration of the stator cuff 13, when the varnish is dropped from above the segment coil, the varnish is pushed by the subsequently dropped varnish and surrounded by the recess 13 d formed in the radial direction of the stator core 2 and the segment coil. It flows toward the central axis of the stator core 2 by a so-called capillary phenomenon that is drawn into the space one after another. At this time, the varnish flows along the recess 13d, overflows from the recess 13d, and flows into the status lot 2c of the stator core 2. As a result, the varnish can be satisfactorily poured into the status lot 2 c of the stator core 2. In addition, in FIG. 4, the flow of the varnish is shown by the arrow.

  Here, as shown in FIG. 4, a notch 13e extending in the radial direction of the stator cuff 13 and continuing to the recess 13d is preferably formed in a portion of the cuff teeth 13b on the inner annular portion 13c side. As a result, the varnish can be actively poured into the central axis side portion of the stator core 2 in the status lot 2 c of the stator core 2.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Stator core structure 2 Stator core 2a Yoke 2b Stator teeth 2c Status lot 3 Stator cuff 3a Outer annular part 3b Cuff satis 3c Inner annular part 3d Outer protrusion 3e Inner protrusion 3f Cuff slot 3g First recess 3h Second recess 4 Conductor segment 4a Leg Portion 4b Connecting portion 13 Stator cuff 13a Outer annular portion 13b Cuff teeth 13c Inner annular portion 13d Recess 13e Notch

Claims (1)

A stator in which a stator cuff is provided on one end face in the axial direction of the stator core,
The stator cuffs are
An outer annular portion disposed on the yoke of the stator core;
One end is connected to the outer annular portion, and cuff teeth disposed on the stator teeth of the stator core;
An inner annular portion connecting the other end of the cuff satice;
An outer protrusion disposed at a position intersecting the cuff satis in the outer annular portion;
An inner protrusion disposed at a position intersecting the cuff satis in the inner annular portion;
With
The outer protrusion is formed with a first recess extending in the radial direction of the stator core,
A stator having a second recess extending in a radial direction of the stator core and continuing from the first recess.

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