JP4247337B2 - Armature insulation structure of rotary motor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armature insulation structure of a rotary motor, and in particular, by using two layers of insulating paper and a Z-shaped phase insulating paper, the dielectric strength can be improved and the partial discharge start voltage can be increased. It relates to new improvements to make it possible.
[0002]
[Prior art]
As an armature insulation structure of this type of rotary motor used heretofore, for example, a configuration (see Patent Document 1) that performs layer separation of windings in a slot has been adopted.
Further, as the configuration of the two-phase winding in these slots, the structure shown in FIGS. 2 and 3 is adopted in-house.
In FIG. 2, reference numeral 1 denotes a slot formed between the magnetic poles 2 of the armature, and the slot 1 is wound in advance in a ring shape via a U-shaped first insulating paper 3. A first phase winding 4 is inserted, and a second phase winding 6 is provided via a phase insulating paper 5 whose overall shape is C-shaped.
A slot cover member 7 having a U-shape is inserted into the inlet 1a of the slot 1 so as to prevent the above-described phase windings 4 and 6 from popping out.
[0003]
Next, since the configuration shown in FIG. 3 is substantially the same as the configuration of FIG. 2, the same reference numerals are given to the same parts as in FIG. 2, and description thereof is omitted, but the slot cover member 7 is the first. The insulating paper 3 is disposed between the inner sides of both ends.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-112495
[Problems to be solved by the invention]
Since the armature insulation structure of the conventional rotary motor has been configured as described above, the following problems existed.
That is, in the configurations of FIGS. 2 and 3, since the insulating paper is one layer, the dielectric strength is low and it is difficult to increase the partial discharge start voltage in the armature.
Further, the phase insulating paper is also one layer, and the same problem as described above exists.
[0006]
The present invention has been made to solve the above-described problems. In particular, the insulation paper has two layers and the phase insulation paper has a Z-shape, thereby improving the dielectric strength and partial discharge. It is an object of the present invention to provide an armature insulation structure for a rotary motor that can increase a starting voltage.
[0007]
[Means for Solving the Problems]
The armature insulation structure of a rotary electric motor according to the present invention inserts first and second phase windings previously wound in a ring shape through insulating paper and phase insulating paper into a slot formed by a plurality of magnetic poles. In the armature insulation structure of the rotary motor in which the slot cover member is inserted into the inlet of the slot so as to cover the phase winding, the insulation paper is composed of first and second insulation paper, and the first insulation The paper is U-shaped and directly joined to the inner surface of the slot, and the second insulating paper is directly joined to the inner surface of the first insulating paper, and the first bent portion and the first other end are arranged at the first end. The phase insulating paper has a Z-shape as a whole, the second end is joined to the inner surface of the first bent portion, and the second other end is the bottom of the second insulating paper. Bonded to the inner surface, bonded to the second bent portion of the second insulating paper at the center of the phase insulating paper, A configuration the second phase windings are separated by the phase insulating paper, Both ends of the slot cover member has a configuration which is positioned inside the first insulating paper.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of an armature insulation structure of a rotary motor according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
In FIG. 1, reference numeral 1 denotes a slot formed between the magnetic poles 2 of the armature. A U-shaped first insulating paper 3 is inserted into the slot 1, and the first insulating paper 3 A second insulating paper 3A is provided in the inside so as to be joined to the inner surface 3a.
[0009]
On one side inside the second insulating paper 3A, a first phase winding 4 previously wound in a ring shape is inserted and provided, and the phase insulating paper 5 whose overall shape is Z-shaped is provided in the second insulating paper 3A. It is provided so as to cover the side portion of the one-phase winding 4.
[0010]
The first bent portion 3Aa, which is the first end bent inward of the second insulating paper 3A, is joined to the second end 5a of the phase insulating paper 5, and the second other end 5b of the phase insulating paper 5 is the second end 5b. 2 Bonded to the bottom inner surface 3Ab of the insulating paper 3A.
[0011]
At the other side position (right side in FIG. 1) of the phase insulating paper 5, a second phase winding 6 wound in advance in a ring shape and having a phase different from that of the first phase winding 3 is inserted and installed. The second bent portion 3Ac, which is the first other end of the second insulating paper 3A, is joined to the central portion 5c of the phase insulating paper 5.
[0012]
The second phase winding 6 is located inside the second bent portion 3Ac, and the second bent portion 3Ac is joined to the central portion 5c of the phase insulating paper 5, so that in the region of the central portion 5c. The phase insulating paper 5 is formed in a double shape like the other portions.
In FIG. 1, the double structure of the first and second insulating papers 3 and 3A and the insulating paper in the central portion 5c is shown as being separated from each other for the sake of clarity. In fact, they are joined together.
[0013]
A slot cover member 7 having a U-shaped cross section is provided in the inlet 1 a of the slot 1, and both ends of the slot cover member 7 are joined to the inside of both ends of the first insulating paper 3. The bent portion 3Aa or the like is configured not to jump outward from the inlet 1a.
[0014]
【The invention's effect】
Since the armature insulation structure of the rotary motor according to the present invention is configured as described above, the following effects can be obtained.
That is, since the insulating paper is formed in a double structure and the phase insulating paper is also partially formed in a double shape, the dielectric strength of the armature is improved, and thereby the partial discharge start voltage of the armature. Can be raised.
Further, since the overall shape of the phase insulating paper is Z-shaped, it is easy to connect to the second insulating paper and a structure with better pressure resistance can be obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an armature insulation structure of a rotary motor according to the present invention.
FIG. 2 is a cross-sectional view showing a conventional structure.
FIG. 3 is a cross-sectional view showing a conventional structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Slot 1a Entrance 2 Magnetic pole 3 1st insulating paper 3a Inner surface 3A 2nd insulating paper 3Aa 1st bending part (1st end)
3Ab bottom inner surface 3Ac second bent part (first other end)
4 First phase winding 5 Phase insulating paper 5a Second end 5b Second other end 5c Center 6 Second phase winding 7 Slot cover member

Claims (2)

First and second phase windings (4, 6) wound in advance in a ring shape through insulating paper and phase insulating paper (5) in a slot (1) formed by a plurality of magnetic poles (2). In the armature insulation structure of the rotary motor inserted and covered with the phase winding (4, 6) by inserting the slot cover member (7) into the inlet (1a) of the slot (1),
The insulating paper comprises first and second insulating papers (3, 3A), and the first insulating paper (3) is U-shaped and directly joined to the inner surface of the slot (1),
The second insulating paper (3A) is directly bonded to the inner surface (3a) of the first insulating paper (3), and has a first bent portion (3Aa) at the first end and a second at the first other end. It has a bent part (3Ac),
The phase insulating paper (5) has a Z-shape as a whole, the second end (5a) is joined to the inner surface of the first bent portion (3Aa) and the second other end (5b) is the second insulation. Bonded to the bottom inner surface (3Ab) of paper (3A),
The phase insulating paper (5) is joined to the central portion (5c) of the second insulating paper (3A) to the second bent portion (3Ac), and the first and second phase windings (4, 6) are An armature insulation structure for a rotary motor, wherein the armature insulation structure is separated by phase insulating paper (5). The armature insulation structure for a rotary motor according to claim 1, wherein both ends of the slot cover member (7) are located inside the first insulation paper (3).

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