JP2000041351A - Armature of electric rotary machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the armature of an electric rotary machine which has a high space factor of an armature coil and facilitates automatic assembly. SOLUTION: This armature is provided with first armature coils 7 of half the number of teeth 2 and second armature coils 8 of half the number of the teeth 2. The first armature coils 7 are wound around the teeth 2 every other one and installed on the bottom parts of slots 3. The second armature coils 8 are wound around the teeth 2, around which the first armature coils 7 are not wound and installed on the upper parts of the slots 3. Since the first and second armature coils 7, 8 can be installed in the slots 3, the space factor is high. Since there is no mechanical interference, automating is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature of a rotating electric machine in which an armature coil is mounted in a slot provided inside a ring-shaped armature core.

[0002]

2. Description of the Related Art A conventional rotating electric machine in which an armature coil is mounted inside a ring-shaped armature core by non-overlapping concentrated winding is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-308142. . FIG. 7 is a front sectional view showing the conventional rotating electric machine, and FIG. 8 is a side sectional view along the AA section.
In the figure, reference numeral 1 denotes a ring-shaped armature core formed by laminating thin steel plates, and 2 denotes a plurality of teeth projecting from the inner surface of the armature core 1 at equal intervals in a circumferential direction.
And a slot 3 is formed between them. The shape of the slot 3 is such that the bottom surface 31 composed of two planes 11a and 11b perpendicular to the center line A-O of the teeth 2a and 2b from the base of the adjacent teeth 2 (2a and 2b), and the adjacent teeth 2 Opposite side surfaces 21 of 2a, 2b
It has a pentagonal cross section surrounded by a and 21b. 4 (4a, 4b) is stored in the slot 3;
The armature coils are alternately mounted in the circumferential direction, and are wound around two bobbins 5a and 5b having different cross sections.
The one bobbin 5a has a trapezoidal cross section. That is, the side surface 51a is the side surface 21a of the tooth 2a.
In close contact with the bottom surface 52a is in close contact with the flat surface 11a, and the width W _a1 of the bottom surface 52a of the bobbin 5a is smaller than the projected width W _S of the opening between the tips of the teeth 2a and teeth 2b, the outer surface 53a is The upper surface 54 extends from the tip of the bottom surface 52a in parallel with the side surface 21b of the adjacent tooth 2b.
a is a width W perpendicular to the center line from the tip of the tooth 2a.
_{It is} extended by _a2 so as to intersect with the outer surface 53a.
The other bobbin 5b has a rectangular cross section. That is, the side surface 51b is in close contact with the side surface 21b of the tooth 2b, a bottom surface 52b is in close contact with the flat surface 11b, and the width W of the top surface 54a of one of the bobbin 5a width W _b1 of the bottom surface 52b from the projected width W _S of the opening _The outer surface 53b is parallel to the side surface 21b of the tooth 2b,
The top surface 54b is parallel to the bottom surface 52b. Reference numeral 6 denotes a rotor provided inside the armature core 1 so as to face each tooth 2 with a gap therebetween.

[0003]

However, the prior art has the following problems. (1) In such a non-overlap concentrated winding armature, first, a bobbin 5a having a trapezoidal cross section is mounted on every other tooth 2a, and then a bobbin 5b having a rectangular cross section is mounted on the remaining teeth 2b. Therefore, it is necessary to design the bobbin 5a and the bobbin 5b so that a slight gap is generated between the bobbin 5a and the bobbin 5b. For this reason, there is a problem that the ratio of the cross-sectional area of the armature coil to the cross-sectional area of the slot 3, that is, the space factor, cannot be made too large. (2) In order to increase the space factor, if the gap between the bobbin 5a and the bobbin 5b is reduced, when the bobbin 5b is mounted, the bobbin 5b is
There is also a problem that automatic assembling becomes difficult because the contact is easily made. (3) In such an armature, generally, an insole (not shown) for interphase insulation is inserted between the armature coils 4a and 4b in the slot, and the armature coil 4a in the coil end portion outside the slot is inserted. Insulation paper (not shown) for interphase insulation is inserted between 4b. However,
Since the members for the interphase insulation consisting of the insole and the insulating paper are formed as individual members, various operations in separate processes are required at the time of manufacturing and assembling. In addition, there is a problem that manufacturing and assembly are costly. Accordingly, it is an object of the present invention to provide an inexpensive armature of a rotating electric machine in which the space factor of the armature coil is high, automatic assembly is easy, and the cost is low.

[0004]

In order to solve the above-mentioned problems, the present invention as defined in claim 1 comprises a ring-shaped armature core and an even number projecting at equal intervals circumferentially inside the armature core. In the armature of a rotating electric machine including a number of teeth and the same number of armature coils as the teeth, and the armature coils being wound around the teeth by concentrated winding, the armature coils have the number of the teeth. Two minutes of
A first armature coil having a number of 1 and a second armature coil having a half of the number of the teeth, wherein the first armature coil is provided on the teeth. The second armature coil is wound around every other coil and attached to the bottom of the slot, and the second armature coil is wound around the unwound teeth of the first armature coil and the slot is wound. It is characterized by being mounted on the upper part. The present invention according to claim 2 provides:
2. The armature of the rotating electric machine according to claim 1, wherein between the first armature coil and the second armature coil, a phase difference between the two armature coils mounted in the slot is different. 3. An integrated insulating paper is provided in which a first insulating member for performing insulation and a second insulating member for performing interphase insulation between the two armature coils at the coil end portion outside the slot are provided. is there. According to a third aspect of the present invention, in the armature of the rotating electric machine according to the second aspect, the integrated insulating paper has one width having an axial length of the armature coil in the slot and a width outside the slot. A belt-like shape having a length greater than the sum of the axial lengths of the armature coils and a width other than the circumferential length at the center of the slot height of the armature core. Inside the body-shaped insulating paper, one having the same shape as the cross section of the tooth tip portion viewed from the direction perpendicular to the central axis direction of the armature, and having holes provided at the same interval as the pitch of the teeth. is there. The present invention described in claim 4 is:
3. The armature of a rotating electric machine according to claim 2, wherein the one-piece insulating paper has one width half the axial length of the armature coil in the slot and half the axial length of the armature coil outside the slot. Two comb-shaped members having irregularities larger than the combined length and larger in the other direction than the circumferential length at the center position of the slot height of the armature core are provided so as to face each other so as to mesh with each other. The interval between the protrusions of the integrated insulating paper is set to twice the pitch of the slots.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 is a front sectional view showing a first embodiment of the present invention, and FIG. 2 is a side sectional view taken along the line AA. In the drawing, reference numeral 1 denotes a ring-shaped armature core formed by laminating thin steel plates, and 2 denotes twelve teeth projecting from the inner surface of the armature core 1 at equal intervals in the circumferential direction. Slots 3 are formed between them, and their basic configuration is the same as the conventional one. The differences between the present invention and the conventional one are as follows. That is, the shape of the slot 3 is substantially rectangular, and the width b _{1 at the} bottom and the width b ₂ at the top are substantially equal. Reference numeral 7 denotes a first armature coil housed at the bottom of the slot 3, and reference numeral 8 denotes a second armature coil housed at the top of the slot 3. Such first armature coils 7 are mounted so as to wind every other tooth 2 of the armature core 1, and a total of six such armature coils are provided. Further, the second armature coil 8 is wound only on the portion of the teeth 2 where the first armature coil 7 is not wound, and a total of six second armature coils 8 are similarly provided. Have been. Since the first embodiment of the present invention has such a configuration, the first armature coil 7 and the second armature coil 8 can be closely attached to each other without generating a gap inside the slot 3, and The space factor of the armature coil in the slot can be almost 100%. Since the first armature coil 7 and the second armature coil 8 are divided into upper and lower layers and mounted in the slots 3, and the teeth 2 are wound every other coil, the coil ends 7a, 8a Since there is no overlap, cooling performance can be improved. Further, the first armature coil 7 and the second
When the armature coil 8 is mounted on the armature core 1, the first wound armature coil 7 is first inserted into the slot 3 from the inside of the armature core 1, and then wound again in advance. Since the second armature coil 8 is inserted into the slot 3, there is no mechanical interference between the first armature coil 7 and the second armature coil 8, the insertion can be simplified, and automation and mechanization can be easily performed. It can be carried out.

Next, a second embodiment of the present invention will be described. FIG. 3 is a plan view of an integrated insulating paper showing the second embodiment. Note that, in order to facilitate the description of the present embodiment, a description will be given with reference to FIGS. That is, in the second embodiment, the first armature coil 7 is inserted into the slot 3 between the first armature coil 7 and the second armature coil 8 in FIG.
Insole X (first insulating member) for performing interphase insulation between the armature coil 7 and the second armature coil 8, and the first armature coil 7 at the coil ends 7a and 8a outside the slot 3. And an insulating paper Y (a second insulating member) for performing a different phase disconnection between the second armature coils 8, and constitutes an integrated insulating paper 9. In FIG. 3, symbols # 1, # 2,... # 12 are attached to the integrated insulating paper 9 at locations corresponding to the center positions of the slots of the armature core. The shape of the integrated insulating paper 9 is such that one width Wi has the axial length of the armature coils 7 and 8 in the slot 3 and the coil end portions 7 a and 8 a of the armature coils outside the slot 3.
2, ie, 2We shown in FIG.
When the distance from the center position (average height) of the slot height of the armature core 1 to the axis center O is r, the circumferential length 2 × π × r ( π is a belt-like shape longer than pi. Further, the integrated insulating paper 9 has an I-shaped punched hole 9a which has substantially the same shape as the cross section of the tip end of the tooth 2 as viewed from a direction perpendicular to the central axis of the armature, and has a punched hole 9a. It is machined at the same number as the taste 2 and at the same pitch. Further, cuts 9b are provided at four corners of the punched hole 9a, and the integrated insulating paper 9 is
Easily pass through the second part of the tooth. Figure 4
FIG. 8 is a diagram showing an insulating configuration in a slot according to the second embodiment. When such an integrated insulating paper 9 is mounted in the slot 3 of the armature core 1, a slot liner 10a is inserted into the inner wall of the slot 3 as shown in FIG. Armature coil 7 is inserted. Next, after the integral insulating paper 9 is inserted, the second armature coil 8 is inserted into the opening above the slot 3, and finally the wedge 10b is inserted. Since the second embodiment of the present invention is configured as described above, the number of work steps can be reduced by integrating both insulating members without the need for a separate process for inserting the insulating paper for the interphase and the insole. The cost required for manufacturing and assembly can be reduced.

Next, a third embodiment of the present invention will be described. FIG. 5 is a plan view of an integrated insulating paper showing a third embodiment of the present invention. In addition, the symbols {1 and} are placed on the integrated insulating paper at locations corresponding to the center positions of the slots of the armature core.
2,... $ 12 is attached. The third embodiment is the same as the second embodiment in that an integrated insulating paper is provided in which an insulating member for insulating between different phases inside and outside a slot is integrated. In the figure, the difference from the second embodiment is that two (91, 91) comb-shaped integral insulating papers having uneven portions are provided so as to face each other. The shape of the integrated insulating paper 91 is such that one width Wi is equal to the axial length of the armature coils 7 and 8 in the slot 3 and the width of the slot 3.
The length of the outer coil ends 7a, 8a is greater than the sum of half the axial length, ie, We + Wc (see FIG. 2), and the other width Li is the center of the slot height of the armature core 1. Assuming that a distance from the position (average height) to the axis center O is r, the circumferential length is larger than 2 × π × r (π is a circular constant). Also, the protrusion P of the integrated insulating paper 91
Is set to twice the pitch of the slot, and the gap between the convex portions P when two integrated insulating papers 91 are opposed to each other has an interval enough to penetrate the teeth of the armature core. It has become. When such an integrated insulating paper 91 is mounted in the slot 3 of the armature core 1, after inserting the first armature coil on the bottom side of the slot, a set of two integrated insulating papers is attached to the electric core core. The two ring surfaces are fitted so as to abut each other at the axial center in the slot 3. Since the third embodiment of the present invention has such a configuration, as in the second embodiment, the number of insulating members can be reduced without requiring a separate process for inserting the insulating paper for the interphase and the insole. By reducing the number, the number of work steps can be reduced, and the cost required for manufacturing and assembling can be reduced. In the present embodiment, an example in which the present invention is applied to a rotating electric machine having an open-slot type armature core has been described, but the present invention is also applied to a rotating electric machine having a semi-open slot-type armature core. It goes without saying that the same effect can be obtained. Further, the armature of this embodiment can be applied to either a two-phase motor or a three-phase motor. In this case, the number of magnetic poles of the rotor is set so that the number of teeth of the armature becomes an even number. And the number of slots of the armature may be optimally selected. In addition to the integrated insulating paper shown in the above embodiment, the integrated insulating paper shown in the second embodiment is the same as the integrated insulating paper in the width Wi in the same direction as the axial direction of the armature core. It may be replaced with a shape formed into two insulating papers (92, 92) each having a divided shape, that is, a comb tooth shape as shown in FIG. In this case, the integrated insulating paper 92 is
As shown in FIG. 6, assuming that the width of a set of two integrated insulating papers abutting each other at the center is Wi, Wi is larger than the axial distance between both ends of the coil. The interval between the protrusions P is made equal to the pitch of the slots.

[0008]

As described above, according to the present invention, the following effects can be obtained. (1) Since the first and second armature coils can be mounted without a gap inside the slot, a rotating electric machine with a high space factor and low loss can be provided. (2) Since there is no mechanical interference between the first and second armature coils, mechanization and automation of insertion of the armature coils into the slots are easy. (3) Since the coil ends do not overlap, the cooling performance of the armature coil is good. (4) Since the coil ends do not overlap, the coil ends can be shortened, and the length of the rotating electric machine can be shortened. (5) Since it is not necessary to perform a separate process for inserting the insulating paper and the insole for the different phases of the armature coil, it is possible to reduce the number of man-hours for the insulating member and to reduce the cost required for manufacturing and assembly. it can.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a first embodiment of the present invention.

FIG. 2 is a side sectional view taken along the line AA of FIG. 1;

FIG. 3 is a plan view of an integrated insulating paper showing a second embodiment of the present invention.

FIG. 4 is a diagram showing an insulating configuration in a slot according to a second embodiment.

FIG. 5 is a plan view of an integrated insulating paper showing a third embodiment of the present invention.

FIG. 6 is a plan view of an integrated insulating paper showing another embodiment.

FIG. 7 is a front sectional view showing a conventional technique.

FIG. 8 is a side sectional view taken along the line AA of FIG. 7;

[Explanation of symbols]

 1: Armature core 11a, 11b: Plane 2, 2a, 2b: Teeth 21a, 21b: Side 3: Slot 31: Bottom 4, 4, a, 4b: Armature coil 5, 5a, 5b: Bobbin 51a, 51b: Side 32a , 52b: bottom surface 53a, 53b: outer surface 54a, 54b: upper surface 6: rotor 7: first armature coil 8: second armature coil 7a, 8a: coil end 9, 91, 92: integrated insulating paper 9a : Hole 9b: Cut

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takahito Doi 2-1 Kurosaki Castle Stone, Yawatanishi-ku, Kitakyushu-shi, Fukuoka

Claims (4)

[Claims] 1. An armature core having a ring shape, an even number of teeth projecting at equal intervals in a circumferential direction inside the armature core, and the same number of armature coils as the teeth. In a rotating electric machine around which the armature coil is wound by concentrated winding, the armature coil has a first armature coil having a half number of the teeth and a two-piece number of the teeth. A second armature coil having a number of one-half, and the first armature coil is wound around every other tooth and mounted on the bottom of the slot, The second armature coil is wound around the teeth on which the first armature coil is not wound, and is mounted above the slot. . 2. Between the first armature coil and the second armature coil, insulation between different phases of the first and second armature coils mounted in the slot is performed. An integrated insulating paper in which a first insulating member is integrated with a second insulating member for performing interphase insulation between the first and second armature coils at a coil end portion outside the slot. Item 3. An armature for a rotary electric machine according to item 1. 3. The integrated insulating paper according to claim 1, wherein one width is larger than a length obtained by adding an axial length of the armature coil inside the slot and an axial length of the armature coil outside the slot. A width is larger than a circumferential length at a center position of the slot height of the armature core, and the inside of the integrated insulating paper has a direction perpendicular to a central axis direction of the armature. With the same shape as the cross section of the tooth tip as seen from
The armature of a rotary electric machine according to claim 2, further comprising a punched hole provided at the same interval as the pitch of the teeth. 4. The integrated insulating paper according to claim 1, wherein one width is larger than a length obtained by adding half of an axial length of the armature coil outside the slot and an axial length of the armature coil outside the slot. A comb-shaped member having an uneven portion whose other width is larger than the circumferential length at the center position of the slot height of the armature core is provided so as to face each other so as to mesh with each other; The armature of a rotary electric machine according to claim 2, wherein the interval between the convex portions of the paper is set to twice the pitch of the slot.