JPS58172944A - Fixing method for interphase insulating paper to stator core of motor - Google Patents

Abstract

PURPOSE:To prevent connecting pieces of interphase insulating paper from flying out from the slots of a stator core by inserting the pieces into the slots of the core and then inserting a fixing piece between the connecting pieces and the holes of the slot. CONSTITUTION:Connecting pieces 2 of interphase insulating paper 1 are opposed to the holes of the slots, in which a coil 40 of a stator core 20 is wound, pieces of insulating paper 1a, 1b of the paper 1 are disposed adjacent to the coil 40, an inserting jig 30 then is inserted into the stator core 20, and an inserting rod 31 is opposed to the pieces 2. Then, an expansion rod 32 is moved down, the rod 31 is moved radially outwardly, the pieces 2 are thus inserted into the slots 21, the pusher 33 of the jig 30 is then moved up, and a fixing piece 23 mounted on the pusher 33 is inserted from the end side hole of the core 20 to between the pieces 2 and the holes of the slots.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for fixing correlation insulation paper to a stator core of an electric motor for performing correlation insulation of coil end portions.

[Technical background of the invention]

This type of correlative insulating paper, which is commonly used, is made by connecting the upper phase interleaving paper and the lower phase interleaving paper with a separate thin connecting insulating rod, and inserting this connecting insulating rod into the slot of the stator core with an opening. By inserting the interphase insulating paper through the stator core, the interphase insulating paper is fixed at a predetermined position on the stator core.

[Problems with background technology]

However, with the above-mentioned interphase insulating paper, when it is inserted and fixed into the slot of the stator core, the connecting insulating rod is thin, so the connecting insulating rod located in the slot may jump out from the opening of the slot while being transferred to the next process. In such a case, it is not possible to insert the coil into the stator core in the next step, resulting in a disadvantage that workability is reduced.

In order to solve this problem, a method has been proposed in which the connecting insulating rod is made thicker to prevent it from popping out from the opening, but in this case, it is troublesome to fix the interphase insulating paper to the stator core. Yes, it is not practical.

[Purpose of the invention]

The present invention has been made in view of the above points, and involves inserting a connecting piece of insulating paper into the slot of the stake core, and further inserting a fixing piece between the connecting piece and the opening of the slot. An object of the present invention is to provide a method for fixing correlative insulating paper to a stator core of an electric motor, which prevents the correlative insulating paper from jumping out of slots and reduces the defective rate when automatically inserting the correlative insulating paper. do.

[Summary of the invention]

The object of the present invention is to place the interphase insulating paper so that the connecting piece of the interphase insulating paper faces the opening of the slot of the stator core,
After inserting the connecting piece into the slot through the opening, a fixing piece is inserted from the end face side of the stator core between the connecting piece and the opening of the slot. [Achieved by a method of fixing interphase insulating paper to the stator core of an electric motor in a manner that prevents it from popping out.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show a correlation insulating paper 1 used in the method of the present invention, and in FIG. 1, a pair of insulating papers 1a, l
b are connected to each other by connecting pieces 2, 2, and the length between the connecting pieces is set to be equal to an integral multiple of the distance between the centers of the slots provided in the stator core. . Figures 2 to 4 show modified examples for effectively inserting the correlative insulating paper into the slots of the stator core. 4, and the length between the bulging parts 4 is set to be longer by the width of the slot than the length which is an integral multiple of the distance between the centers of the slots. In FIG. 3, the connecting pieces 5, 5 are made of insulating paper so that the length interval between the insertion parts of the connecting pieces 5, 5 into the slots is longer by the width of the slot than the length which is an integral multiple of the distance between the centers of the slots. They are arranged with an inclination angle of 1a and 1b.

Furthermore, in FIG. 4, the connecting pieces 6, 6 are insulating paper la,
It is formed integrally with lb. That is, three incisions 8 , 9 ,
10 and pull it in the direction indicated by the arrow to make the cut 8.
The narrow width between the notches 9 and 10 forms the connecting piece 6, and the narrow width between the notches 9 and 10 forms the connecting piece 6.

In this case, the connecting piece 6 is formed by applying force to a narrow piece in the direction of the arrow, so a twisted portion occurs, but the length of this cut 8.10 is set slightly longer than the laminated thickness of the stator core. It's convenient.

On the other hand, the stator core of the electric motor is provided with slots 21 opening radially inward at equal intervals in the circumferential direction, as shown in FIG. As shown in the figure, the interval G is considerably narrower than the slot width. The connecting piece 2 of the insulating paper 1 is inserted into the slot 21, and a fixing piece 23 is inserted between the connecting piece 2 and the opening 220 to prevent the connecting piece 2 from protruding inward from the slot 21. is inserted to cover the opening n. The fixed piece is formed by bending both sides of a flat plate in the same direction, and the bent part U is located on the opposite side of the opening n so that the connecting piece 2 is recessed. It has been inserted.

On the other hand, as shown in FIG. 7, the insertion jig for fixing the correlative insulating paper includes an insertion rod 31 inserted into the stator core, and an insertion rod 31 that contacts the inner surface of the insertion rod 31 and moves the insertion rod 31 outward in the radial direction. It has an expansion rod 32 that pushes out the insertion rod 32, a pusher blade located below the insertion rod 31 for pushing the fixed piece n upward, and a lower tool 34 that acts as a guide for inserting the fixed piece n into the slot 21. The insulating paper 1 is fixed to the stator core and the fixing piece 23 is inserted into the slot 21.

In FIG. 6, reference numeral 40 is a coil, and 41 is a slot insulating paper.

Next, a method of fixing the interphase insulating paper will be explained.

First, the interphase insulating paper 1 is placed so that the connecting piece 2 faces the opening 22 of the slot 21 of the stator core. As a result, the insulating papers 1a and lb are placed adjacent to the coil cutter.

Next, the insertion jig is inserted into the stator core whitening, and the insertion rod 31 is placed opposite to the connecting piece 2.

On the other hand, a fixed piece is attached to the bushing blade of the insertion jig.

The expansion rod is then lowered, the insertion rod 31 is moved radially outwards, and the connecting piece 2 is inserted into the slot 21.

As a result, the correlation insulating paper 1 is inserted into the stator core 20.

At the same time, the bushing blade rises, and the fixed piece passes through the opening on the end face side of the stator core of the slot (slot 21).
inserted within. The fixed piece includes the connecting piece 2 and the slot 21.
slot 21.
The opening s22 is now covered by this fixed piece.

In this case, when the tip of the fixed piece reaches the lower end of the connecting piece 2, the expansion rod blade rises and the insertion rod aim returns to its original position, so the fixed piece is attached to the insertion rod. It never hits.

Note that when using the above-mentioned mutually insulating paper in which the distance between the connecting pieces is set to be an integral multiple of the distance between the centers of the slots plus the width of the slots (see Figures 2 and 3), the connecting pieces are connected to the slot 21. This will ensure secure attachment.

Further, the fixed piece may be removed after the coil is inserted in the next step, or may be kept as it is and used as a slot correlation insulating paper for insulating between the coils in the slot.

Fig. 1θ shows a circuit diagram for using an electric motor in a power-saving manner, in which a driving capacitor core is provided in series with the auxiliary coil 51 of the main coils and auxiliary coils 51 arranged in parallel, and a driving capacitor core is provided in parallel with this driving capacitor 51. It is constructed with a current relay ring containing high resistance aluminum alloy wire. That is, as shown in Fig. 11, the current relay ring is made by winding high-resistance aluminum alloy wire between the cylindrical parts between the main bodies, and the circuit is as shown in Fig. 11. .

Therefore, when the current relay ring starts, it operates in the same way as a positive temperature coefficient thermistor and can obtain the required torque, and in the operating state after acceleration, the current relay ring becomes open, so it is similar to a positive temperature coefficient thermistor. There is no self-consumption, allowing for maximum power savings. Also, since a starting capacitor is not required, the number of parts is reduced and wiring is simplified.

Although a surge current is generated from the closed circuit during start-up when the circuit is turned off, it is absorbed by the resistance and actance of the current source starter, so it is attenuated and has the effect of preventing welding of the contacts.

〔Effect of the invention〕

As described above, according to the present invention, the connection pieces do not pop out after inserting the interphase insulating paper into the slots of the stator core, so the defect rate in the automatic interphase insulating paper insertion process is reduced, and the coil insertion in the next process is reduced. This has effects such as improved workability.

[Brief explanation of drawings]

1 to 4 are plan views of the correlation insulating paper, FIG. 5 is a diagram showing the material of the correlation insulating paper in FIG. 4, and FIG. 6 is an explanatory diagram showing the state of fixing the correlation insulating paper to the stator core, FIG. 7 is an explanatory diagram showing the procedure for inserting the correlation insulating paper into the slot of the stator core, FIG. 8 is an enlarged view of the main part of FIG. 6, and FIG. 9 is a diagram showing the state in which the correlation insulating paper is fixed to the slot. FIG. 1θ is a starting circuit diagram in which the electric motor is arranged, FIG. 11 is a sectional view of the current relay, and FIG. U is a circuit diagram of the current relay. DESCRIPTION OF SYMBOLS 1... Correlation insulating paper, 2 Connecting piece, Processing... Stator core, 21... Slot, n... Opening, 23... Fixed piece, 31... Insertion rod, 32... Expansion Sticks, feathers...
Bush, chrysanthemum...coil Applicant's agent Kiyoshi Inomata Figure 6 Figure 8 Figure 7 Figure 9

Claims (1)

[Claims] A correlative insulating paper is provided in which a pair of insulating papers are connected by a connecting piece, and this correlative insulating paper is placed in a slot of the stator core so that the connecting piece faces the opening, the connecting piece is inserted into the slot through the opening, and then A fixing piece is arranged on the end face side of the stator core and facing the opening of the slot, and this fixing piece is inserted between the connecting piece inserted into the slot and the opening to fix the correlative insulating paper. This is a method of fixing insulating paper to the stator core of an electric motor.