JPS58119750A - Inserting method for interphase insulating paper for rotary electric machine - Google Patents

Abstract

PURPOSE:To shorten the assembling time of a rotary electric machine by containing an outer layer coil in a slot, shaping a coil end, then disposing a drum- shaped interphase insulating paper at the prescribed position of a coil inserting unit and containing by the coil inserting unit an inner layer coil in the slot. CONSTITUTION:After slot insulating paper 11 is inserted into the slot 2 of a stator core 1, an outer layer coil 4 is contained in the slot 2, and the coil end 4a of the coil 4 is pressed and shaped. Then, an inner layer coil 5 is engaged with a blade 8, the trapezoidal insulating paper 7a of a drum-shaped interphase paper 7 is disposed at the outer periphery of the end of a wedge guide 9, and a wavy insulating paper 7b is disposed at the inner periphery of the end of the blade 8, and a coupling piece 7c is further disposed between the blades 8 which are opposed to the slots 2, to which the coil 5 is inserted. Subsequently, the core 1 is contacted fixedly with the outer periphery of the blade 8, the coil 5 is then pressed by a pressing element 10 to be inserted into the slot 2, and the paper 7a is inserted and held between the coil ends 4a and 5a. In this manner, the assembling time can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an insertion method for inserting correlation insulating paper (hereinafter referred to as correlation paper) between layers of coil ends arranged in multiple layers of a stator coil.

Figure 1 shows a conventional structure in which correlation paper is inserted between the layers of the coil end. In Figure 2, (1) is formed on the stator core, (2) is formed on the stator core (1), and the stator coil (3) is formed on the stator core (1). (3 is the coil end, (4) is the coil end (outer layer coil forming the outer circumferential side of S, (5)
is the coil end (the inner layer coil that makes up the inner circumferential side of 3),
(6) is the coil end (Sa).

This is correlation paper inserted between the layers. In fig.

The outer layer coil (4) and the inner layer coil (5) are shown to be housed in the same slot (2), but generally the outer layer coil (4) and the inner layer coil (5) are housed in each slot (2). As shown in FIG. 2, ty, v.

Each phase of W is wound concentrically and arranged so that one coil is accommodated in each slot (2). The figure shows 8 phases, 4 poles, 24
The case of slot is shown. Figure 3 shows the correlation paper (6) that has been used in the past, and after all the coils (3) are accommodated in each slot (2), the coil end is
3) is a strip-shaped interlayer paper inserted between the layers of the strip-shaped interlayer paper (6
The gap between the outer layer coil (4) and the inner layer coil (5) is narrow and the insertion work is done manually, which requires a lot of work time. It had the disadvantage of moving. C@b), (
60) is an H-type interlayer paper that is used after housing the outer coil (4) in the slot (2), and Ii-type interlayer paper (@b) is a stack of a pair of strip-shaped interlayer paper (@a) on the core (1). H-shaped interleaving paper (6C) is a interlayer paper made by welding or other methods to combine joining pieces (@d) whose lengths are adjusted according to the thickness L. H-shaped interleaving paper (6C) is made by combining a pair of strip-shaped interlayer paper (6a) and a joining piece (6a). It is a correlative paper that is formed by punching out one piece of insulating paper from a single sheet of insulating paper.
After manually attaching the shape interlayer paper (61) (6) to the inner circumference of the outer layer coil (4), insert the coupling piece (6d) into the slot (2) where the inner layer coil (5) is accommodated. It has nine disadvantages: it requires a lot of work time and low productivity.

The purpose of this invention is to improve the above-mentioned drawbacks of the conventional method, and it proposes a method in which a tsuzumi-yoshi coil is inserted into a slot and at the same time, an interlayer paper is inserted between the layers of the coil end. This is what we provide.

An embodiment of the present invention will be described below with reference to FIGS. 4 to 6. In the figures, the same reference numerals as in Figures 1 to 3 indicate the same or corresponding parts;
7a) to (1d) are parts constituting the drum-shaped interlayer paper (7); (yb) is a corrugated insulating paper whose circumferential cross section is corrugated after being formed into a trapezoid by heat forming. Joining piece # (7(1) is a welding part) for joining the trapezoidal insulating paper (7L) and the corrugated insulating paper (7b) by welding or the like.

Figure 5 shows the main parts of the coil inserter configured as above and inserting the large drum-shaped interlayer paper (7) between the layers of the coil end (3a), and (8) shows the inner peripheral part of the stator core (1). a blade (9) facing the slot (2) and guiding the coil (3) into the slot (2);
A wedge (not shown) disposed on the outer periphery of the stator core (11) whose tip abuts against the stator core (11) to prevent the coil (3) from escaping from the slot (2). The guide Ql is guided by the blade (8) and is advanced from the bottom to the top in Figure 2.
) and press the coil (3) hooked to the slot (2).
This is a presser that is inserted into the inside.

Next, we will describe the procedure for inserting the outer layer coil (4) and inner layer coil (5) into the coil ends (4a) (5aE) using the drum-shaped interleaving paper and coil inserter configured as above.First, we will explain the preparation process. After inserting the slot insulating paper I, which insulates between the coil (3) and the iron core (1), into the slot (2) of the stator core (1) using another special machine, use the coil inserter to insert the outer layer coil ( 4) into the slot (2
), and the coil end (4a
) after pressing and shaping.

Remove from coil inserter. Next, the inner layer coil (5)
is hung on the blade (8), and the trapezoidal insulating paper (7a) of the drum-shaped interleaving paper (7) is placed on the outer periphery of the tip of the wedge guide (9), and the corrugated insulating paper CTb) is placed inside the tip of the blade (8). The coupling pieces (7C) are arranged between the blades (8) facing the slots (2) into which the inner layer coils (5) are inserted. Next, in the preparation process, the outer layer coil (4) is housed in the stator core (1
) as shown by the chain line in Figure 5, the inner periphery is the blade (
8), and the lower part is held in a position where it is in contact with the tip of the wedge guide (9), and the upper part is pressed and fixed with a presser foot (not shown).

Then, by raising the coil to the pusher, the inner layer coil (5) is pressed by the pusher aφ and inserted into the slot (2), and at the same time, the inner layer coil (5) is inserted into the slot (2) as shown in FIG. The trapezoidal insulating paper (7a) of the interleaf paper (7) is pressed by the coil end (5a) of the inner layer coil (5), and the coil ends (4a) (5) of the outer layer coil (4) and the inner layer coil (5) are pressed.
a) The connecting piece (7C) is held in the slot (2) into which the inner +4:l file (5) is inserted.

Also, by further raising the presser.

The upper coil end (5a) of the inner layer coil (5) comes off the tip of the blade (8) and presses against the corrugated insulating paper (71).

The corrugated insulating paper (1b) has an outer layer coil (4) and an inner layer coil (
5) is held between the coil ends (4a) and (5a).

Then, by retracting the presser arm, the stator core (!
) is removed, the stator core (1) around which the stator coil (3) is wound is removed from the coil inserter, and the coil end (3a) is finished and shaped as shown in Figure 6. Attach the drum-shaped paper (7) to the coil end (3).
A stator (I) mounted between the layers of a) is obtained.

In addition, corrugated insulating paper [
1b] was used to reduce the external dimensions by making the circumferential cross section corrugated. This is to prevent the inner peripheral portion of (1) from coming into contact with the insulating paper.

Note that the above embodiment uses an hourglass-shaped interlayer paper (7) in which one side of the insulating paper is trapezoidal and the other is corrugated; however, the invention is not limited to this; A similar effect can be obtained if a cylindrical insulating paper is bonded to a connecting piece, such as by making the other side corrugated.

In addition, in the above embodiment, the three-phase four-phase
In a motor with 24 poles and slots.

Although we have described a case where the coil end is configured in two layers, as shown in Fig. 1, in a three-phase, four-pole, 24-slot electric motor, the coil end is configured with an outer layer coil aη consisting of the U phase and a W phase. During the α field of the inner layer coil, 7
By providing an intermediate layer coil (Is) consisting of layers,
The coil end is composed of three layers, the outer layer coil aη is inserted into the slot of the stator core, the middle layer coil α is inserted into the slot together with the hourglass-shaped interlayer paper after forming, and the inner layer coil aη is inserted into the slot together with the hourglass-shaped interlayer paper after forming. By inserting the coil (+'J) into the slot, it is possible to insert interphase paper between the layers of the coil end using the coil inserter.
The number of poles, the number of slots, and the number of layers of coil ends can be arbitrarily selected.

As described above, according to the present invention, by using the interphase insulating paper formed in the shape of an hourglass, the outer layer coil is accommodated in the slot, the coil end is placed in the shaping layer, and the correlative insulating paper is placed in the predetermined position of the coil inserter. At the same time as inserting the inner layer coil into the slot (using the coil inserter), interphase insulating paper is inserted between the layers of the coil end, which shortens the assembly time of a single-rotation electric machine and improves productivity. can provide an insertion method.

[Brief explanation of drawings]

Fig. 1 to Fig. 3 show conventional examples, Fig. 1 is a front view of the stator in the assembly layer, Fig. 2 is a layout diagram of stator coils, Fig. 3 is a plan view of various correlation papers, Fig. 4 6 to 6 show an embodiment of the present invention, FIG. 4 is a perspective view of the hourglass-shaped interlayer paper, and FIG. 6 is a front view of the stator after assembly is completed, and FIG. 1 is a layout diagram of stator coils showing another embodiment. In the figures, the same reference numerals indicate the same or equivalent parts, (
1) is the stator core, (2) is the thrower), (3) is the stator coil, (4) is the outer layer coil, (5) is the inner layer coil, (7) is the drum-shaped interphase insulating paper, and (7&) is the Trapezoid insulation paper. (1b) is corrugated insulation paper, (8) is play)', el
l is a presser. Agent: Patent Attorney Makoto Kuzuno - tIN1 Figure 4g2 Figure 3 (b) (This) Figure 6

Claims (1)

[Claims] The coil end of the concentrically wound stator coil is the inner layer,
In a method for inserting correlative insulating paper in a rotating electric machine, which is arranged in multiple layers such as an outer layer and inserting correlative insulating paper between these layers, after the inner layer coil is hooked to the blade of the coil inserter,
A drum-shaped large interphase insulating paper is placed in a predetermined position of the coil inserter, and the stator core with the outer layer coil housed in the slot is fixed in contact with the outer periphery of the blade, and then the inner layer coil is inserted into the coil inserter. A method for inserting correlative insulating paper into a rotating electric machine, characterized in that the correlative insulating paper is pressed by a presser of an inserter and accommodated in the slot, and the correlative insulating paper is inserted between the coil ends of the outer layer coil and the inner layer coil.