JPS5959037A - Interphase insulating structure for rotary electric machine - Google Patents

Abstract

PURPOSE:To readily automate the machining and insertion of an interphase insulator by dividing approximately rectangular insulator for each slot and disposing them between the coil ends and in the slots. CONSTITUTION:A slot liner 3 is inserted into the slot 2 formed on a core 1, further divided for each slot, and approximately rectangular insulators 9 are disposed together with auxiliary coils 4 (4a-4c) and main coils 5 (5a-5e) between the coil ends and in the slot 2. The insulators 9 are formed of thin synthetic resin materials and bend in approx. channel shape through two folding lines 90 formed corresponding to the width of the slot 2. The insulator between the coil 4 and the coil 5 has a function of a spacer and functions of the insulator and separator between the coils of different phase in the slot 2 and has a function of a wedge.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an interphase insulation structure of a rotating electrical machine that insulates between the main coil and auxiliary coil of a single-phase armature winding and between different-phase coils of a multi-phase armature winding. It is related to.

In single-phase armature windings and multi-phase armature windings, in order to improve electrical insulation reliability, phase insulators are generally inserted between different-phase coils at the coil ends or between different-phase coils in slots.

[Prior art]

As a conventional example, an interphase insulation structure of a single-phase armature winding will be explained using FIGS. 1 to 6.

The basic interphase insulation structure has approximately rectangular insulating pieces 7 between the different phase coils in the slot 2, that is, between the main coil and the auxiliary coil.
is arranged, and a band-shaped insulator 8 is arranged between the different-phase coils of the five coil ends in a slightly lagged manner.

The substantially rectangular insulating piece 7 is generally made of a thin sheet material made of synthetic resin (
Example: A polyester film (with a thickness of around 0.18 mm) is used, and after being automatically cut and shaped by a coil (not shown) and wet-zo insertion machine, it is automatically inserted into the slot 2 of the iron core 1 together with the auxiliary coil 4. be done.

On the other hand, the band-shaped insulator 8 is generally made of a thin sheet material made of synthetic resin (for example, a polyester film with a thickness of about 0.18 mm), and is initially pressed into the shape shown in FIG. After being inserted into the slot 2 of the iron core 1, the coils were manually inserted and arranged one by one between the coil ends of the auxiliary coil 4 and the main coil 5. However, as rotating electric machines become smaller and more efficient, the space factor of the conductor in the slot increases and the circumference of the coil end becomes shorter.
The insertability of the band-shaped insulator 8 deteriorated, and the band-shaped insulator 8 was likely to be misaligned in the process after insertion, resulting in a lack of stability as interphase insulation.

Therefore, in order to eliminate the above-mentioned drawbacks, as shown in FIG. 4, a substantially H-shaped insulator in which band-shaped insulators 8 at both coil ends are integrated has been used as an interphase insulator at the coil ends. Although this approximately H-shaped interphase insulator is made by integrally punching the synthetic resin thin sheet material using a press (not shown), the yield of the material is significantly reduced.

In recent years, as shown in FIG. 5, as a roughly H-shaped interphase insulator that eliminates this drawback, the band-shaped insulator 8 at both coil ends is made of synthetic resin thread or the like, as shown in FIG. Bands 8 have come to be integrated by ultrasonic welding.

However, the approximately H-shaped interphase insulator shown in FIGS. 4 and 5 is significantly more expensive than the strip-shaped insulator shown in FIG. 3.

The approximately H-shaped interphase insulator is generally formed by inserting and press-forming the auxiliary coil 4, the wedge 6, and the approximately rectangular insulating piece 7, and then forming the connecting band 8' shown in FIG. 4 or the connecting band 8' shown in FIG. The strip 8 is inserted into the slot 2, and the strip insulator 8 is inserted into the slot 2.
is arranged at both coil ends, and then the main coil 5 is inserted.

Attempts have been made to automate the placement of this abbreviated H-shaped interphase insulator to the armature winding, such as by inserting it at the same time as the coil or automatically inserting it in a separate process. Defects such as breakage and misalignment of the insulation between the shapes occur, making complete automation difficult and requiring manual work.

In addition, in FIG. 1 and FIG. 2, 3 indicates a slot liner, and in FIG. 2, 4a to 4c are auxiliary coils, and 58 to 5 are
e indicates the main coil.

[Purpose of the invention]

An object of the present invention is to provide a phase-to-phase insulation structure for a rotating electric machine, in which the cost including the material cost and processing cost of the phase-to-phase insulation is low, and the phase-to-phase insulation work can be easily automated. It's about doing.

[Summary of the invention]

The present invention divides a substantially rectangular insulator into slots and arranges it between the coil ends and within the slot, thereby providing functions as an insulator and spacer between the coil ends, and processing and processing of the interphase insulator. Made it easy to automate insertion. Furthermore, the present invention aims at reducing the cost of the insulator by integrating the substantially rectangular insulators of both coil ends in each slot, and also serving as interphase insulation and wedges in the slots.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on the drawings.

7 to 1O show an embodiment of the present invention, in which a slot liner 3 is inserted into a slot 2 formed in an iron core 1, and is further divided into slots and placed between the coil ends and between the slots 2. A substantially rectangular insulator 9 is disposed therein together with the auxiliary coil 4 and the main coil 5.

The substantially rectangular insulator 9 is made of a thin synthetic resin material (for example, polyester film with a thickness of about 0.18 mm), and is provided corresponding to the width of the slot 2 as shown in FIG. It is folded or bent into a substantially channel shape through two creases 90. It functions as an insulator and spacer between the different phase coils at the coil end, that is, between the auxiliary coil 4 and the main coil 5, and also functions as an insulator and a 7-4 regulator between the different phase coils in the slot 2. It also has the function of a wedge.

As mentioned above, the fold line 9 (n is the fold line 9 formed in the substantially rectangular insulator 9 corresponding to the width of the slot 2)
This increases the rigidity of the insulator 9, improves the ease of inserting the substantially rectangular insulator 9 into the slot 2, improves the stability of the insulator 9 in the slot 2, and also improves the stability of the insulator 9 in the slot 2. By developing a reaction force between the ends, it enhances its function as a spacer to prevent contact between coils of different phases at the coil ends.

Further, the length of the substantially rectangular insulator 9 in the axial direction is formed so as to prevent contact between coils of different phases at least at the coil end, and is set as necessary according to the position of the coil end. You may unify them according to the longest one.

On the other hand, the coil ends between adjacent substantially rectangular insulators 9 are in a butted state, a wrapped state, or a state with a gap, but the armature winding specifications are adjusted to prevent contact between coils of different phases. It will be set accordingly.

The functions of the substantially rectangular insulator are summarized in the following table. In this table, approximately rectangular insulators 9a to 9j
indicates the same substantially rectangular insulator in the position shown in FIG.

Next, an example of a method for processing the substantially rectangular insulator 9 and inserting it into the armature winding will be described.

In a generally used coil and sea urchin insertion machine (not shown), the hoop-shaped thin sheet material made of synthetic resin is used to form a substantially rectangular insulator 9 with folds 9 (M) in the longitudinal direction, as shown in FIG. is disconnected.

It is formed and loaded into a magazine. Along with this,
The auxiliary coil 4 is wound on the coil insertion jig.

After this, the auxiliary coil 4 is inserted into the slot 2 of the iron core 1, and the substantially rectangular insulator 9 is temporarily inserted.

Next, the shape of the coil end of the auxiliary coil 4 is adjusted, and a ninth coil is placed at a predetermined position on the coil end of the auxiliary coil 4.
As shown in the figure, a substantially rectangular insulator 9 is inserted.

Then, in order to insert the main coil 5, the auxiliary coil 4 and the substantially rectangular insulator 9 are shaped, and then the main coil 5 is inserted into the slot 2 by a coil and wedge insertion machine.
Furthermore, wedges 6 are inserted at necessary locations.

Through the above steps, as shown in FIGS. 7 and 8,
It is possible to provide phase-to-phase insulation at the coil ends.

In addition, in FIGS. 1 to 6 showing the prior art and FIGS. 7 to 9 showing the embodiment of the present invention, the same members are given the same reference numerals and explained.

Next, FIGS. 11 to 14 show various embodiments of substantially rectangular insulators.

In the case shown in FIG. 11, chamfers 93 are applied to both end edges of portions 91 and 92 bent from the fold line '-1CI. Thereby, the insertability of the substantially rectangular insulator 9 into the slot 2 can be improved.

Next, in the case shown in FIG. 12, a notch 94 is provided at a portion of one end of portions 91 and 92 that are bent from the fold line and protrudes from the slot 2. As shown in FIG. Furthermore, in the case shown in FIG. 13, notches 94 and 95 are provided in portions 91 and 92 that are bent from the fold line 90 and protrude from the slots 2 at both ends.

Furthermore, in the case shown in FIG. 14, a notch 94 is provided at a portion protruding from the slot 2 at one end of one portion 91 bent from the beginning of the fold, and the other portion 9
A notch 95 is provided at a portion of the other end of the slot 2 that protrudes from the slot 2. As a result, these 12th
In the embodiments shown in FIGS. 13 and 14, the substantially rectangular insulator 9 can be prevented from being displaced after being inserted into the slot 2 by the action of the notch.

Furthermore, the substantially rectangular insulator 9 may be formed in a shape in which the width t of both ends gradually increases, as clearly shown in FIG. In this way, the state of the coil end between the adjacent substantially rectangular insulators 9, that is, the butt state, the wrapped state, etc., becomes more reliable 9, and the insulation function can be further improved. Although FIG. 15 is disclosed in correspondence with FIG. 10, it goes without saying that this technical concept can also be used in the systems shown in FIGS. 11 to 15.

In each of the above-mentioned embodiments, a single substantially rectangular insulator 9 is formed so that the coil ends at both ends corresponding to the same slot can be insulated, but this can be separated if necessary. , it may be arranged such that it is inserted into the slot 2 from each coil end.

Furthermore, as shown in FIG. 16, the substantially rectangular insulator 9 may be constructed so that the protruding portions of the slots 2 are connected to each other. In this way, it is possible to prevent the operation of the connecting portion from shifting the position of the substantially rectangular insulator 9 after insertion into the slot 2, and to prevent rotation of the substantially rectangular insulator 9 within the slot 2. Accompanying positional displacement can be prevented. In this embodiment, a substantially rectangular insulator 9
Although a case has been described in which two sets of windings are connected, the number is not limited to this, and can be arbitrarily determined depending on the number of types of insulator windings, the manufacturing process, etc.

Although the above embodiments have been described with respect to single-phase armature windings, the present invention can also be applied to multi-phase armature windings such as lapped coils and concentrically wound coils.

〔Effect of the invention〕

The present invention has the structure 9 described above, and according to the present invention, a substantially rectangular insulator having an axial length necessary to prevent contact between coils of different phases is provided between the coil ends and between the coil ends. By arranging the interphase insulator in the slot, it not only has the effect of significantly reducing the cost of materials and processing costs for the interphase insulator compared to conventional technology, but also makes it easier to attach the interphase insulator to the armature winding. This has the effect of easily achieving automation.

[Brief explanation of drawings]

Fig. 1 is a partial exploded view of a stator showing a conventional interphase insulation structure, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is an exploded view of a conventional band-shaped insulator, The figure is a single punched military strategy H
FIG. 5 is a developed view of the ultrasonic welded H-type interphase insulator, FIG. 6 is a perspective view of a stator equipped with a conventional band-shaped insulator, and FIG. 7 is the insulator of the present invention. A partial exploded view of the stator showing an example of the mutual insulation structure, FIG. 8 is the same as ■- in FIG. 7.
■A cross-sectional view taken along the line, Figure 9 is a perspective view of the stator equipped with a substantially rectangular insulator, Figure 10 is a perspective view of the approximately rectangular insulator in its free state, Figures 11 and 12 , Fig. 13, Fig. 14
15 and 16 are free perspective views of various embodiments of generally rectangular insulators. 1... Iron core, 2... Slot, 3... Slot liner,' 4... Auxiliary coil, 5... Main coil, 6...
...wezzo, 9...approximately rectangular insulator, punched...crease, 94.95...notch. Agent Patent Attorney Tadashi Akimoto Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 14 Figure 9 Figure 16

Claims (1)

[Claims] 1. In the interphase insulation of the coil ends of the armature winding, a substantially rectangular insulator having an axial length necessary to prevent at least contact between coils of different phases is provided between the coil ends and An interphase insulation structure for a rotating electric machine characterized by being arranged in a slot. 2. The mutual insulation structure for a rotating electric machine according to claim 1, wherein the substantially rectangular insulator is formed to a length that can insulate coil ends at both ends of the same slot. 3. The interphase insulation structure for a rotating electric machine according to claim 2, wherein the substantially rectangular insulator has a notch in a portion protruding from the slot.