JP5343625B2 - Insulator for rotating electrical machine and stator for rotating electrical machine - Google Patents

Description

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

  In order to improve the performance of rotating electrical machines such as electric motors and generators, it is important to strengthen the magnetic poles of the stator. For this purpose, it is desirable to increase the space factor with respect to the area of the slot surface of the electric wire wound around the stator (hereinafter referred to as “winding” as appropriate). When the winding is collapsed, the space factor is reduced. For example, in Patent Document 1, a winding method when winding an electric wire around the teeth of the split stator core via an insulator (insulating bobbin). By devising, the space factor is prevented from lowering by preventing the wires from falling.

JP 2005-20875 A

  However, in order to realize such a winding method, a large-scale change of the winding device is required or a new winding device is required, resulting in a manufacturing cost.

  The present invention has been made paying attention to such a conventional problem, and is capable of preventing the winding from collapsing without requiring a large-scale change of the winding device. It is an object to provide an insulator for a motor and a stator for a rotating electric machine.

  The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected, it is not limited to this.

  The present invention is an insulator for a rotating electrical machine that insulates an iron core (50) of a split stator core of a rotating electrical machine from an electric wire (60) wound around the core, and is provided on a slot surface (11a) of the rotating electrical machine. A ridge portion (21a) extending in parallel with the rotation axis direction, a slot surface (11a) provided continuously to the ridge portion (21a), and a surface (11c) continuous to the slot surface (11a). And a step portion (21) including a chamfered portion (21b) for chamfering a corner formed by.

  According to the present invention, the electric wire between the step portion (protruding portion) and the step portion (protruding portion) of the slot surface is guided by the protruding portion, and the electric wire on the protruding portion has corners before and after the chamfered portion. It will be guided to the part. Therefore, the electric wire wound around the slot surface is parallel to the rotational axis direction of the rotating electrical machine, and unnecessary gaps can be prevented and the space factor can be improved.

It is a figure which shows 1st Embodiment of the insulator for rotary electric machines by this invention. It is a figure explaining the size and pitch of a protruding item | line part. It is a figure which shows 2nd Embodiment of the insulator for rotary electric machines by this invention. It is a figure which shows 3rd Embodiment of the insulator for rotary electric machines by this invention. It is a figure which shows an example of a comparison form.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a view showing a first embodiment of an insulator for a rotating electrical machine according to the present invention, and FIG. 1 (A) is a view as seen from the direction of the rotating shaft of the rotating electrical machine with the insulator for the rotating electrical machine attached to a core core. The coil end surface is shown. FIG. 1B is a perspective view showing a main part of the insulator for a rotating electrical machine. Note that the rotation axis direction of the rotating electrical machine is the normal direction (depth direction) in FIG. 1A and the vertical direction in FIG.

  The insulator 1 for a rotating electrical machine is mounted around the teeth 51 of the core iron core 50. The insulator 1 for rotating electrical machines insulates the core iron core 50 from an unillustrated electric wire wound around the core iron core 50. The insulator 1 for a rotating electrical machine includes an insulator body 11, a back yoke side flange 12, and a tooth tip side flange 13. The insulator body 11 has a rectangular tube shape including a right slot surface 11a, a left slot surface 11b, a coil end surface 11c, and a coil end opposite surface 11d. The back yoke side flange 12 and the teeth tip side flange 13 are provided at both ends of the insulator body 11, respectively. The back yoke side flange 12 and the tooth front end side flange 13 are parallel to each other. The teeth center line coincides with the normal direction of the back yoke side flange wall surface and the teeth tip side flange wall surface.

  As shown in FIG. 1B, a right step portion 21 is formed from the right slot surface 11a to the coil end surface 11c and the coil end opposite surface 11d. The right side step portion 21 includes a ridge portion 21a and two chamfered portions 21b.

  The ridge portion 21a is formed to project from the slot surface 11a. The ridge portion 21a extends in parallel to the rotation axis direction of the rotating electrical machine. That is, the ridge portion 21a extends in parallel to the normal direction (depth direction) in FIG. 1A and parallel to the vertical direction in FIG. The size and pitch of the ridge portion 21a will be described later.

  The chamfered portion 21b is provided continuously with the ridge portion 21a. The upper chamfered portion 21b in FIG. 1B is formed by chamfering the angle formed by the slot surface 11a and the coil end surface 11c continuous with the slot surface 11a. The lower chamfered portion 21b in FIG. 1B is formed by chamfering the angle formed by the slot surface 11a and the coil end opposite surface 11d continuous with the slot surface 11a.

  A plurality of right-side stepped portions 21 including the convex portion 21a and the chamfered portion 21b as described above are formed at predetermined intervals. This interval is the same as or slightly wider than the width of the electric wire wound around.

  Although the left side step part 22 is the structure containing the protruding item | line part 22a and the two chamfering parts 22b, since it is the same as that of the right side step part 21, description is abbreviate | omitted.

  The right side step portion 21 and the left side step portion 22 are symmetrical with respect to the teeth center line when viewed from the rotating shaft direction of the rotating electrical machine, that is, when viewed from the coil end surface as shown in FIG. Formed.

  FIG. 2 is a diagram for explaining the size and pitch of the ridge portion.

  As shown in FIG. 2 (A), the pitch a of the ridge portion 21a is the same as or slightly wider than the width w of the electric wire 60 wound around. The width b of the ridge portion is the same as or slightly wider than the width w of the electric wire wound around. The height c of the ridge portion is larger than the corner R of the electric wire wound around, and smaller than the length (h−R) obtained by subtracting the corner R from the electric wire height h.

  With such a dimensional relationship, as shown in FIG. 2B, when the electric wire 60 is wound, the corner R can be prevented from riding on the convex portion 21a. Further, it is possible to prevent the corner R of the electric wire 60 from riding on the corner R of the adjacent electric wire 60.

  Here, in order to facilitate understanding of the present embodiment, a comparative embodiment will be described with reference to FIG. FIG. 5 is a diagram showing an example of a comparative form. FIG. 5A is a view of the rotating electrical machine viewed from the direction of the rotation axis of the rotating electrical machine in a state where the insulator for the rotating electrical machine is mounted on the core core, and shows the coil end surface side. The center line of the teeth was set to the left and right direction. FIG. 5B is a view of the slot surface viewed from the direction of arrow B in FIG.

  As described above, in order to strengthen the magnetic pole of the stator, it is necessary to increase the space factor with respect to the area of the slot surfaces 11a and 11b of the electric wire 60 wound around the stator. For this purpose, it is desirable to wind the electric wires 60 on the slot surfaces 11a and 11b so as to be parallel to the rotation axis direction of the rotating electrical machine. In order to wind the electric wire 60 in such a manner, it is necessary to hang the electric wire 60 diagonally at least on the coil end surface 11c. If the peripheral surface of the schletter is flat, the wire 60 is pulled obliquely as shown in FIG. 5B, and the electric wire also becomes inclined with respect to the rotating electric machine rotation axis direction even on the coil end surface 11a. In some cases, a gap could not be wound. If the gap is generated in this way, the space factor is lowered.

  On the other hand, in this embodiment, on the slot surfaces 11a and 11b of the insulator, the ridge portions 21a and 22a that are the same or slightly wider than the width of the electric wire 60 and are parallel to the rotation axis direction of the rotating electrical machine, The step portions 21 and 22 including the chamfered portions 21 b and 22 b continuing to the protruding portions 21 a and 22 a were formed at the same or slightly wider intervals with respect to the width of the electric wire 60. By configuring in this way, the electric wires between the stepped portions (projected strip portions 21a, 22a) and the stepped portions (projected strip portions 21a, 22a) of the slot surfaces 11a, 11b are guided by the projected strip portions 21a, 22a. The electric wire on the ridge portion is guided by the front and rear corners of the chamfered portions 21b and 22b. Therefore, the electric wires wound around the slot surfaces 11a and 11b are parallel to the rotation axis direction of the rotating electrical machine, and unnecessary gaps can be prevented and the space factor can be improved.

(Second Embodiment)
FIG. 3 is a view showing a second embodiment of an insulator for a rotating electrical machine according to the present invention, FIG. 3 (A-1) shows a first insulator, FIG. 3 (A-2) shows a second insulator, FIG. 3 (B) is a diagram for explaining the operational effects when the first insulator and the second insulator are used.

  Since the first insulator 1-1 is the same as the insulator for a rotating electrical machine described as the first embodiment, detailed description is omitted, but the step portions 21 and 22 are spaced from the back yoke side flange 12 by a predetermined distance (around the periphery). It is formed with a gap equal to or wider than the width of the wire to be wound.

  The second insulator 1-2 is formed with stepped portions 21 and 22 adjacent to the back yoke side flange 12.

  When the first and second insulators configured in this way are used, as shown in FIG. 3 (B), since the unevenness of each other comes to be combined, the number of windings of the electric wire can be increased, The space factor can be further improved.

(Third embodiment)
FIG. 4 is a view showing a third embodiment of an insulator for a rotating electrical machine according to the present invention, and FIG. 4 (A) is a view of a main part of the insulator for a rotating electrical machine as viewed from the rotating shaft direction of the rotating electrical machine. A face is shown. FIG. 4B is a diagram for explaining the operational effects when the insulator for a rotating electrical machine according to this embodiment is used.

  The insulator 1 for a rotating electrical machine of the present embodiment is provided with stepped portions 21 and 22 on each of the slot surfaces on both sides of the tooth center line when viewed from the rotating electrical machine rotating shaft direction. The step portion 21 formed on one of the slot surfaces (the right slot surface in FIG. 4A) is formed adjacent to the back yoke side flange 12. The step portion 22 formed on the other slot surface (the left slot surface in FIG. 4 (A)) has a predetermined distance from the back yoke side flange 12 (the same or wide distance as the width of the wire wound around). It is formed with a gap.

  When the insulator for a rotating electrical machine constructed in this way is used, as shown in FIG. 4B, the unevenness of each other comes to be combined. Can be improved. Moreover, since it is not necessary to prepare two types of insulators as in the second embodiment, the manufacturing cost can be reduced.

  Without being limited to the embodiments described above, various modifications and changes are possible within the scope of the technical idea, and it is obvious that these are also included in the technical scope of the present invention.

  For example, in the above-described embodiment, the configuration in which the step portions are formed on the slot surfaces on both sides sandwiching the teeth center line when viewed from the rotating electric machine rotating shaft direction has been described as an example, but formed on only one of the slot surfaces. However, it may not be formed on the other slot surface.

  In addition, two chamfered portions that are continuous with the ridge portion are formed on the upper side and the lower side, but may be only one side.

DESCRIPTION OF SYMBOLS 1 Insulator for rotary electric machines 11 Insulator main body 11a Right side slot surface 11b Left side slot surface 11c Coil end surface 11d Coil end opposite surface 12 Back yoke side flange 13 Teeth front end side flange 21, 22 Step part 21a, 22a Projection part 21b, 22b Chamfer Part 50 Core iron core 51 Teeth 60 Electric wire

Claims (8)

An insulator for a rotating electric machine that insulates an iron core of a divided stator core of a rotating electric machine and an electric wire wound around the core,
A chamfered corner formed by a ridge portion provided on the slot surface and extending parallel to the rotation axis direction of the rotating electrical machine, and a slot surface provided continuously with the ridge portion and a surface continuous with the slot surface. A step portion including a chamfered portion,
Insulator for rotating electrical machine characterized by the above. The insulator for a rotating electrical machine according to claim 1,
The stepped portion has the same or wide width as the width of the electric wire wound around, and a plurality of strips are formed at intervals equal to or wider than the width of the electric wire.
Insulator for rotating electrical machine characterized by the above. In the insulator for a rotating electrical machine according to claim 1 or 2,
The stepped portion is formed symmetrically with respect to the tooth center line on each of the slot surfaces on both sides of the tooth center line when viewed from the rotating electric machine rotation axis direction.
Insulator for rotating electrical machine characterized by the above. In the insulator for a rotating electrical machine according to claim 1 or 2,
The step portion is formed on one of the slot surfaces on both sides of the tooth center line when viewed from the rotating electric machine rotation axis direction.
Insulator for rotating electrical machine characterized by the above. In the insulator for rotary electric machines according to any one of claims 1 to 4,
The stepped portion is formed with respect to the back yoke side flange at the same or a wide interval as the width of the electric wire wound around.
Insulator for rotating electrical machine characterized by the above. In the insulator for rotary electric machines according to any one of claims 1 to 4,
The step is formed adjacent to the back yoke side flange,
Insulator for rotating electrical machine characterized by the above. In the insulator for a rotating electrical machine according to claim 1 or 2,
The step portion is provided on each of the slot surfaces on both sides of the center line of the teeth when viewed from the rotating electric machine rotation axis direction, and is formed adjacent to the back yoke flange on one slot surface, In the slot surface of the back yoke side flange is formed with the same or wide gap as the width of the electric wire wound around.
Insulator for rotating electrical machine characterized by the above. Using the insulator for a rotating electrical machine according to any one of claims 1 to 7,
A stator for a rotating electrical machine.

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