JP2008109746A - Stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator whose mass productivity can be improved by smoothing a winding locus. <P>SOLUTION: First and second ring-like insulating cover members are used for electrically insulating a ring-like stator core and a stator winding. The cover members each have a ring-like base provided along the ring-like stator core, a magnetic pole portion 5 provided on each ring-like stator core and covering each magnetic pole 1a, and a plurality flange portions 70 protruding along an axial direction 6 of the ring-like stator core from each magnetic pole cover portion 5 in a tip of protruding direction of each magnetic pole cover portion 5. In each flange portion 70, a both end shape viewed along the diameter direction of the ring-like stator core 1 is a semi-circular shape having a diameter of the width W of each flange portion 70 along the circumferential direction of the ring-like stator core. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stator used for a resolver, a motor, and the like, and in particular, by changing the shape of a collar portion of a ring-shaped insulating cover member, a needle track (winding track) of an automatic winding machine is made smooth and mass-productive. The present invention relates to a new improvement for improving the above.

  As this type of stator that has been conventionally used, for example, a stator shown in Patent Document 1 is used. Generally, this type of stator has a structure as shown in FIGS. FIG. 5 is a front view showing a conventional stator, FIG. 6 is a sectional view taken along line CC in FIG. 5, and FIG. 7 is a sectional view taken along line DD in FIG. As shown in the figure, the multi-layered annular stator core 1 is provided with a plurality of magnetic poles 1a inwardly spaced from each other in the circumferential direction. Although not shown, a stator winding is wound around the magnetic pole 1a by an automatic winding machine. The annular stator core 1 is interposed between the annular stator core 1 and the stator winding, and the first and second annular insulation covers that electrically insulate the annular stator core 1 and the stator winding from each other on both surfaces of the annular stator core 1. Members 2 and 3 are attached. The first and second ring-shaped insulating cover members 2 and 3 are provided separately from each other, and are assembled so as to sandwich the ring-shaped stator core 1 from both the front and back surfaces when attached to the ring-shaped stator core 1. The first and second annular insulating cover members 2 and 3 may be provided integrally with each other. The first and second annular insulating cover members 2 and 3 include an annular base 4 provided along the annular stator core 1, a magnetic pole cover 5 provided on each annular base 4 to cover each magnetic pole 1a, A plurality of flanges 7 projecting along the axial direction 6 of the annular stator core 1 from each magnetic pole cover portion 5 at the projecting direction tip of the magnetic pole cover portion 5, and extending along the end face of the annular stator core 1 at one end of the annular stator core 1. It is comprised from the insulated extension part 8 made.

Japanese Patent Laid-Open No. 10-309067

  In the conventional stator as described above, the collar portion 7 has only an R shape (a rounded shape) as shown in FIG. The winding trajectory 10 when winding the wire becomes large, and the winding time becomes long. In addition, in order to form the needle locus (winding locus 10) using the two R corners, the program becomes complicated and the structure of the automatic winding machine using a mechanical cam or the like becomes complicated. Has become extremely expensive.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a stator that can smooth a winding locus and improve mass productivity.

A stator according to the present invention includes a ring-shaped stator core in which a plurality of magnetic poles are provided inward or outward at intervals in the circumferential direction, a stator winding wound around the magnetic poles, a ring-shaped stator core, and a stator winding A first and second annular insulating cover members that are interposed between the wires and electrically insulate the annular stator core and the stator winding from each other on both sides of the annular stator core. Each ring-shaped insulating cover member includes a ring-shaped base portion provided along the ring-shaped stator core, a magnetic pole cover portion provided on each ring-shaped base portion for covering each magnetic pole, and each magnetic pole cover at the tip of each magnetic pole cover portion in the protruding direction. The end portions of each flange when viewed along the radial direction of the ring-shaped stator core are formed of a plurality of flanges protruding from the portion along the axial direction of the ring-shaped stator core. The width of each flange portion along the circumferential direction and has a semi-circular with a diameter.
In addition, the collar portion has a non-arc portion whose tip is cut off.

According to the stator of the present invention, when viewed along the radial direction of the annular stator core, both end shapes of the flanges are semicircles having the diameters of the widths of the flanges along the circumferential direction of the annular stator core. Therefore, the shortest winding trajectory can be secured, the time required for winding the stator winding can be shortened, and the mass productivity can be improved. Further, by reducing the winding locus, the alignment winding error can be reduced. Furthermore, the winding program of the automatic winding machine can be simplified and the manufacturing cost can be reduced as compared with the case of drawing a square winding locus.
In addition, since the flange portion has a non-circular arc portion whose tip is cut off, mass productivity can be improved in terms of material cost when mass production is performed, and an increase in size in the axial direction of the annular stator core is prevented. Can do.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a front view showing a stator of a resolver according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along line AA in FIG. The same or equivalent parts as those of the conventional stator will be described using the same reference numerals. In the figure, a plurality of magnetic poles 1a are provided on a ring-shaped stator core 1 made of multilayer or sintered at intervals in the circumferential direction. Although not shown, a stator winding is wound around the magnetic pole 1a by an automatic winding machine. The annular stator core 1 is interposed between the annular stator core 1 and the stator winding, and first and second annular insulation covers that electrically insulate the annular stator core 1 and the stator winding from each other on both sides of the annular stator core 1. Members 20 and 30 are attached. The first and second annular insulating cover members 20 and 30 are assembled so that the annular stator core 1 is sandwiched from both the front and back surfaces when attached to the annular stator core 1 provided separately from each other. The first and second annular insulating cover members 20 and 30 may be provided integrally with each other.

  The first and second annular insulating cover members 20 and 30 include an annular base 4 provided along the annular stator core 1, a magnetic pole cover 5 provided on each annular base 4 to cover each magnetic pole 1a, A plurality of flange portions 70 projecting along the axial direction 6 of the annular stator core 1 from each magnetic pole cover portion 5 at the projecting direction tip of the magnetic pole cover portion 5, and extending along the end face of the annular stator core 1 at one end of the annular stator core 1. It is comprised from the insulated extension part 8 made. A plurality of pins 9 are planted in the insulating extension 8. The stator winding after being wound around the magnetic pole 1a via the respective ring-shaped insulating cover members 20 and 30 is connected to the pin 9 by an automatic winding machine. In other words, the resolver stator of this embodiment is automatically assembled by an automatic winding machine.

  Next, FIG. 3 is a cross-sectional view taken along line BB in FIG. 1 and shows a state in which the flange portion 70 is viewed along the radial direction of the annular stator core 1. In the conventional flange portion 7, only the corner portion has an R shape. However, in this embodiment, as shown in FIG. 3, both ends of each flange portion 70 when viewed along the radial direction of the annular stator core 1 are used. The shape is a semicircle whose diameter is the width W of each flange 70 along the circumferential direction of the annular stator core 1. That is, in this embodiment, when viewed along the radial direction of the annular stator core 1, the shape of each of the annular insulating cover members 20 and 30 at the tip portion of the magnetic pole 1 a is the same as the magnetic pole 1 a in the axial direction 6 of the annular stator core 1. The shape starts to draw an arc from the position where it started to protrude.

  Next, the operation will be described. As shown in FIG. 7, the conventional flange portion 7 has a rectangular shape as a whole, and thus the winding locus 10 has been large in the prior art. However, the flange portion 70 of this embodiment has a half width W as a diameter. Since it is a circle, the winding locus 100 can also draw a semicircle, and the locus of the stator winding can be shortened without difficulty. As a result, the time required for winding the stator winding can be shortened and the mass productivity can be improved. Further, by reducing the winding locus, the alignment winding error can be reduced. Furthermore, the winding program of the automatic winding machine can be simplified and the manufacturing cost can be reduced as compared with the case of drawing a square winding locus.

Embodiment 2. FIG.
FIG. 4 is a cross-sectional view showing the main part of the stator of the resolver according to the second embodiment of the present invention. In the figure, the shape of both ends of the collar portion 71 of the second embodiment is a semicircle having a width W as a diameter as in the first embodiment, but the non-arc portion with the tip cut off. 71a. In this embodiment, the non-arc portion 71a is a straight portion. In other words, the flange portion 71 has a substantially trapezoidal shape with the width W at the front end in the protruding direction of the magnetic pole 1a as the lower side. Other configurations are the same as those in the first embodiment.

  In such a resolver stator, the flange portion 71 has a shape in which the tip in the protruding direction is cut off, so that mass productivity can be improved in terms of material cost when mass-produced, and the axial direction of the annular stator core 1 6 can prevent the size from increasing.

  In the second embodiment, it has been described that the non-arc portion 71a is a straight portion. However, the shape of the non-arc portion is such that the tip of the hook portion is closer to the magnetic pole 1a side than the case where the hook portion is a semicircle. As long as it is arbitrary, for example, it may be uneven.

  In the first and second embodiments, the stator (inner rotor type stator) in which the magnetic pole 1a protrudes inward has been described. However, the present invention also applies to a stator (outer rotor type stator) in which the magnetic pole protrudes outward. Applicable.

  Furthermore, although Embodiment 1 and 2 demonstrated the stator used for a resolver, this invention is applicable also to stators, such as a motor.

It is a front view which shows the stator of the resolver by Embodiment 1 of this invention. It is sectional drawing which follows the line AA of FIG. It is sectional drawing which follows the line BB of FIG. It is sectional drawing which shows the principal part of the stator of the resolver by Embodiment 2 of this invention. It is a front view which shows the conventional stator. FIG. 6 is a cross-sectional view taken along line CC in FIG. 5. FIG. 6 is a cross-sectional view taken along line DD in FIG. 5.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Ring-shaped stator core, 1a Magnetic pole, 4 Ring-shaped base part, 5 Magnetic pole cover part, 20, 30 1st and 2nd ring-shaped insulation cover member, 70, 71 collar part, 71a Non-arc part.

Claims (2)

A ring-shaped stator core (1) in which a plurality of magnetic poles (1a) are provided inward or outward at intervals in the circumferential direction;
A stator winding wound around the magnetic pole (1a);
The annular stator core (1) is interposed between the stator windings and electrically insulates the annular stator core (1) and the stator windings from both sides of the annular stator core (1) and is integrated with each other. Or first and second annular insulating cover members (20, 30) formed separately, and
Each of the ring-shaped insulating cover members (20, 30) includes a ring-shaped base portion (4) provided along the ring-shaped stator core (1), and a magnetic pole provided on the ring-shaped base portion and covering the magnetic poles (1a). A plurality of flanges projecting from the magnetic pole cover portions (5) along the axial direction (6) of the annular stator core (1) at the projecting direction tips of the magnetic pole cover portions (5); (70, 71)
When viewed along the radial direction of the annular stator core (1), both end shapes of the flanges (70, 71) are the flanges (70, 71) along the circumferential direction of the annular stator core (1). The stator is characterized by being a semicircle with the width of the diameter as a diameter.   The stator according to claim 1, wherein the flange portion (71) has a non-arc portion (71 a) whose tip is cut off.

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