JP2011239526A - Motor armature - Google Patents

Abstract

An object of the present invention is to obtain an armature of a motor having good filling fluidity of an insulating resin and an improved coil space factor.
An armature core having a yoke portion, a tooth portion, and a tooth tip edge, and an axial end portion and a shaft of the yoke portion, the tooth portion, and the tooth tip edge mounted on the armature core. An armature of a motor, comprising: an insulator 20 that insulates a side end portion in a direction with a predetermined thickness; and a coil 30 that is wound from above the insulator 20 around the teeth portion with the predetermined thickness separation. 90, a belt-like recess 15 is formed in the axially central portion of the armature core 10 of the armature core 10 that is not insulated and coated on the insulator 20, and the recess 15 Insulating resin was filled in the gap between the coil 15 and the inner periphery of the coil 30.
[Selection] Figure 5

Description

  The present invention relates to an armature (stator, mover) of a rotary type or linear type motor.

  Conventionally, a core having a teeth portion, a winding body formed by winding a winding around the teeth portion, and disposed between a surface of the teeth portion and an inner peripheral portion of the winding body. A split stator for an electric motor comprising: an insulating spacer member that holds an inner peripheral portion of the winding body from the surface of the tooth portion with a gap; and a high thermal conductive resin filler filled in the gap. It is disclosed (for example, see Patent Document 1).

JP 2008-283730 A

  However, according to the conventional technique described in Patent Document 1, the resin filler is filled in the gap corresponding to the thickness of the insulating spacer member between the inner peripheral portion of the winding body and the surface of the tooth portion. Therefore, in order to ensure filling fluidity of epoxy resin or the like, the thickness (gap) of the insulating spacer member needs to be 1 mm or more. Depending on the thickness of the insulating spacer member, the winding body ( Coil) There is a problem that the space factor becomes low.

  The present invention has been made in view of the above, and an object of the present invention is to obtain a motor armature having a good filling fluidity of a resin filler (insulating resin) and an improved coil space factor. .

  In order to solve the above-described problems and achieve the object, the present invention provides an armature core having a yoke part, a tooth part, and a tooth tip edge, and the yoke part, the tooth part, and the tooth tip attached to the armature core. An insulator for insulatingly coating the axial end portion and the axial end side portion of the edge with a predetermined thickness; and a coil wound around the predetermined thickness separation from above the insulator to the teeth portion. An armature of a motor provided, wherein a concave portion that is continuous in a strip shape is formed in a central portion in the axial direction of a yoke portion, a tooth portion, and a tooth tip edge of the armature core that is not covered with insulation on the insulator, and the concave portion An insulating resin is filled in a gap between the coil and the inner periphery.

  According to the present invention, there are effects that the fluidity of the insulating resin is good and the coil space factor can be increased.

FIG. 1 is a perspective view showing an armature core of an embodiment of an armature of a motor according to the present invention as seen from a tooth portion side. FIG. 2 is a perspective view of the armature core according to the embodiment as viewed from the yoke portion side. FIG. 3 is a cross-sectional view of the tooth portion showing the armature core and the insulator according to the embodiment. FIG. 4 is a perspective view of the armature of the motor according to the embodiment as viewed from the tooth portion side. FIG. 5 is a perspective view of the armature of the motor according to the embodiment as viewed from the yoke portion side.

  Embodiments of a motor armature according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment FIG. 1 is a perspective view of an armature core of a motor according to an embodiment of the present invention as seen from the teeth portion side showing an armature core, and FIG. 2 is a yoke showing the armature core of the embodiment. FIG. 3 is a cross-sectional view of the tooth portion showing the armature core and the insulator according to the embodiment, and FIG. 4 is a tooth portion showing the armature of the motor according to the embodiment. FIG. 5 is a perspective view seen from the side, and FIG. 5 is a perspective view seen from the yoke part side showing the armature of the motor of the embodiment.

  As shown in FIGS. 1 and 2, the armature core 10 is formed by laminating silicon steel plates, and has a yoke portion 11 corresponding to a substantially T-shaped head portion and a yoke portion corresponding to a substantially T-shaped body portion. 11 has a tooth portion 12 protruding from 11 and a tooth tip edge 13 corresponding to a substantially T-shaped leg portion. If the end portions 11a of the yoke portions 11 of the armature cores 10 are brought into contact with each other and the armature cores 10 are arranged in an annular shape, an armature core of a rotary motor is obtained. If the armature core 10 is arranged in a straight line, the armature core of a linear motor is obtained.

  As shown in FIGS. 3 to 5, the insulator 20 is made of polyphenylene sulfide resin (PPS), liquid crystal polymer (LCP), or the like, and is disposed at the axial end of the yoke portion 11 of the armature core 10. The shaft of the tooth portion 12 of the armature core 10 by connecting the flange portion 21, the second flange portion 23 disposed at the axial end of the tooth tip edge 13, and the first flange portion 21 and the second flange portion 23. And a body portion 22 (see FIG. 3) for insulatingly covering the direction end portion.

  The insulator 20 is formed in a bowl shape as a whole, and includes a first flange side portion 21a for insulatingly covering the axial end side portion of the yoke portion 11, and a second flange for insulatingly covering the axial end side portion of the tooth tip edge 13. The side part 23a and the trunk | drum side part 22a which carries out insulation coating of the axial direction end side part of the teeth part 12 are provided. The insulator 20 is attached to the armature core 10 so as to sandwich the armature core 10 from both axial ends of the armature core 10.

  As shown in FIGS. 1, 2, and 3, the yoke portion 11 of the armature core 10 that is not insulatedly coated on the first flange side portion 21 a, the second flange side portion 23 a, and the trunk side portion 22 a of the insulator 20, A concave portion 15 that is continuous in a strip shape is formed at the center in the axial direction of the tooth portion 12 and the tooth tip edge 13. The concave portion 15 can be formed by narrowing the yoke portion 11, the tooth portion 12, and the tooth tip edge 13 of the silicon steel plate constituting the central portion in the axial direction of the armature core 10.

  The depth H of the recess 15 is 0.6 mm or more, and the thickness T of the first flange side portion 21 a, the second flange side portion 23 a, and the trunk side portion 22 a of the insulator 20 depends on the depth H of the recess 15. Therefore, it is desirable that the thickness is 0.4 mm or less. That is, when the depth H of the recess 15 is deeper than 0.6 mm, the thickness T of the insulator 20 is desirably thinner than 0.4 mm. Thereby, the clearance gap between the recessed part 15 and the inner peripheral part of the coil 30 mentioned later can be about 1.0 mm.

  As shown in FIG. 3, locking claws 25 are provided at the recess side ends of the first flange side portion 21 a, the second flange side portion 23 a, and the body side portion 22 a of the insulator 20, and the locking claws 25 are If it is made to latch on an edge, it can prevent that insulator 20 falls from armature core 10 in the manufacturing process of armature 90 (refer to Drawing 4 and Drawing 5). The locking claw 25 may be provided only on the trunk side portion 22a. The outer side of the latching claw 25 has a tapered surface so that the latching claw 25 is not caught on the corner of the armature core 10 when the insulator 20 is mounted on the armature core 10.

  As shown in FIGS. 4 and 5, insulators 20 are attached to both end portions of the armature core 10 in the axial direction, and the first flange portion 21 and the second flange portion 23 are used as a guide from above the insulator 20 to the teeth portion 12. The coil 30 is wound.

  The depth H of the recess 15 of the armature core 10 is set to 0.6 mm, and the thickness T of the first flange side portion 21a, the second flange side portion 23a, and the trunk side portion 22a of the insulator 20 is set to 0.4 mm. For example, the gap between the concave portion 15 and the inner peripheral portion of the coil 30 is 1.0 mm, and the tooth tip edge 13 is inserted into the gap between the concave portion 15 and the inner peripheral portion of the coil 30 that are continuous in a strip shape. An epoxy resin as an insulating resin can be easily filled from the opening.

  A plurality of armatures 90 are arranged in an annular shape, fitted into a cylindrical frame, and the gap between the coils 30 of adjacent armatures 90 and the coil end portion 31 are molded with an insulating resin. It becomes an armature.

  If the armature 90 is arranged in a straight line and fixed to the frame, and the gap between the coils 30 of the adjacent armature 90 and the coil end portion 31 are molded with an insulating resin, the armature of the linear motor Become. The time when the insulating resin is filled in the gap between the recess 15 and the inner peripheral portion of the coil 30 may be a single armature 90 or simultaneously with the above molding.

  According to the armature 90 of the motor of the above embodiment, the area in the slot (excluding the insulator) is S1, the total sectional area of the windings wound in the slot is S2, and S2 / S1 Is used as the coil space factor, for example, an insulator having a thickness of about 0.4 mm is used instead of a conventional armature using an insulator having a thickness of about 1 mm. % To 50% space factor can be improved. Thereby, motor loss (copper loss) can be reduced by 25% to 35%.

  As described above, the armature of the motor according to the present invention is useful as an armature with reduced motor loss (copper loss).

DESCRIPTION OF SYMBOLS 10 Armature core 11 Yoke part 11a Circumferential end part 12 Teeth part 13 Teeth tip edge 15 Recess 20 Insulator 21 1st flange part 21a 1st flange side part 22 trunk | drum 22a trunk | drum side part 23 2nd flange part 23a 2nd flange Side 25 Locking claw 30 Coil 31 Coil end 90 Motor armature

Claims (6)

An armature core having a yoke portion, a teeth portion and a tooth tip edge;
An insulator that is attached to the armature core and that insulates and covers the yoke portion, the teeth portion, and the tooth end edge in the axial direction and the axial end side with a predetermined thickness;
A motor armature comprising a coil wound around the predetermined thickness separation from above the insulator to the teeth portion,
A concave portion that is continuous in a strip shape is formed in the central portion in the axial direction of the yoke portion, the teeth portion, and the tip end edge of the armature core that is not insulatedly coated on the insulator, and between the concave portion and the inner peripheral portion of the coil. An armature for a motor, wherein the gap is filled with an insulating resin.   The armature of the motor according to claim 1, wherein a depth of the concave portion is 0.6 mm or more.   The armature of the motor according to claim 2, wherein a thickness of the insulator is 0.4 mm or less.   A locking claw is provided at a recess side end portion of an insulator covering an axial end side portion of a tooth portion of the armature core, and the locking claw is locked to an edge portion of the recess. Item 4. The motor armature according to any one of Items 1 to 3.   A rotation characterized in that a plurality of armatures of the motor according to any one of claims 1 to 4 are arranged in an annular shape, and a gap between adjacent coils of an armature and a coil end portion are molded with an insulating resin. Type motor armature.   A linear structure comprising a plurality of armatures of the motor according to any one of claims 1 to 4 arranged linearly, and a gap between adjacent armature coils and a coil end portion molded with an insulating resin. Type motor armature.

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