JPS6243418B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a phase-to-phase insulation structure for a motor that is intended to improve the phase-to-phase insulation of a motor coil for providing phase-to-phase insulation between windings of different phases in a motor that winds windings.

Conventionally, it has been common knowledge in terms of quality to provide phase-to-phase insulation between windings of different phases in the motor winding manufacturing process.
Various considerations have been made. For example, as shown in Figures 1 and 2, a rectangular interphase insulating plate is manually cut out between the first phase coil 2 and the second phase coil end 3 on the stator core 1. In the case where the insulating plate is inserted between the coil phases, the insulating plate lifts up during coil insertion molding, resulting in a reduction in the insulating function. In order to prevent this insulating plate from lifting up, it has been used by connecting the opposite coil end with a thin leg that fits into the stator core groove and wrapping several plates together, as shown in FIG. 2B. However, since it is formed by cutting out one piece in this manner, the material utilization rate is poor and the cost is high.
Furthermore, even if the above-mentioned work involves inserting mechanical windings, interphase insulation must be done manually each time each interphase winding is inserted, which poses a major obstacle to streamlining motor manufacturing.

In order to eliminate the above-mentioned problems, the applicant invented ``Insulating Paper for Rotating Electrical Machines'' published in Japanese Patent Application Laid-Open No. 54-48005. In other words, one or more slit grooves are formed on the outer or inner periphery in a donut shape with a round hole shaped close to the inner diameter of the stator core or a hole shaped to facilitate insulation of the coils of other phases (layers). The application was filed for an insulating paper having one or more slits in each or both of the slits. Although this was able to eliminate the above problem, it is not possible to prevent vertical tilting and rotational deviation when inserting the insulating paper, and it is not possible to automate the insertion of the insulating paper. It also had the problem that it was not easy.

This invention eliminates these problems and enables rationalization through more complete mechanization. That is, it is an object of the present invention to provide an interphase insulating material for a motor in which the interphase insulating material is inserted at the same time as the machine winding is inserted.

Embodiments of the present invention will be described in detail below with reference to FIGS. 3 to 5. As shown in FIGS. 3 and 4, the present invention is constructed such that a circular interphase insulating plate 5 on the coil insertion side is inserted between the first phase coil 2 and the second phase coil 3 as a basic form. Several notches 6 are formed radially from the outer diameter side in this annular interphase insulating plate 5, and the tips of the notches are formed in an arc shape to prevent tearing.
It is opened at an appropriate angle from the tip so that the width on the outer diameter side (notch entrance) is wider. Furthermore, a pair of opposing small protrusions 7 are provided on the inner diameter side of the central axis of the notch 6 for positioning during insertion into the machine and for preventing the interphase insulating plate 5 from falling off during the insertion process. Furthermore, in this embodiment, the inner diameter of the interphase insulating plate 5 is made into an oval or inert circle in the direction of the central axis of one of the notches 6, and the small protrusion 7 is provided in the short axis direction of this oval, This has the effect of relaxing the tension on the interphase insulating plate 5 when inserting the machine.

When the annular interphase insulating plate 5 constructed as described above is used and assembled, it is carried out as shown in FIGS. 5 and 6. That is, when inserting the second phase coil 3, the interphase insulating plate 5 is inserted between the first phase coil 2 and the second phase coil 3 together with the second phase coil 3 from the direction of the arrow shown in the figure by a mechanical inserter. At this time, the insertion side of the interphase insulating plate 5 is positioned above the second phase coil 3 by the small protrusion 7 on the inner diameter side so as to provide effective insulation between the first phase coil 2 and the second phase coil 3. The second phase coil 3 and the second phase coil 3 are pushed together. Further, at this time, the small protrusions 7 on the inner diameter side have the function of positioning as well as preventing the interphase insulating plate 5 from falling off during insertion. When the inner diameter of the interphase insulating plate 5 is pushed in by inserting the second phase coil 3, this is facilitated by the notch 6 on the outer diameter side, and the first
It is attached and fixed between the phases of the phase coil 2 and the second phase coil 3.

At this time, the notch 6 on the outside diameter side has an arcuate tip to prevent tearing due to the force applied during insertion, and the width on the outside diameter side (notch entrance) is wide. Therefore, since the overlap between the two edges of the notch 6 can be maintained appropriately after insertion and installation, it has the advantage that curling is less likely to occur compared to a simple cutting and slit process. Also, this notch must be positioned uniquely due to the positional relationship of insulation between the first phase coil 2 and the second phase coil 3, so as shown in FIG. By engaging with the groove, it is configured to prevent displacement to the left and right and also to prevent the interphase insulating plate 5 from falling downward. Therefore, after inserting the first phase coil 2, the small protrusion 7 of the interphase insulating plate 5 is placed on the groove of the wedge guide 8 from above the second phase coil 3, which has been wound and mounted on the wire guide blade 9, to position it. If the second phase coil 3 is then inserted, interphase insulation processing can be performed. In addition, the inner diameter of the interphase insulating plate 5 is formed into an oval or an inert circle, and a pair of small protrusions are provided in the short axis direction of this oval, so even if the interphase insulating plate 5 is deformed in the long axis direction when inserted into a machine, it will not be inserted. You can perform the movements smoothly.

A series of these installation operations can be performed simultaneously when inserting the coil using an inserter winding machine, so the conventional manual phase-to-phase insulation process is completely unnecessary, significantly reducing the number of man-hours and improving the motor manufacturing process. This will enable revolutionary rationalization.

Furthermore, the same insulation treatment as described above can be achieved by using two pairs of small protrusions 7 on the inner diameter side corresponding to the notches 6, as in the interphase insulating plate 5 of another embodiment shown in FIG. The effect is the same as that described above or positioning can be performed more reliably.

As described above, the present invention can perform positioning when inserting an interphase insulating plate using a mechanical inserter, and can prevent the interphase insulating plate from falling off during insertion. It also prevents the notch on the outer diameter side of the interphase insulating plate from tearing.
This has practical effects, such as helping to improve productivity in manufacturing electric motors and significantly reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a developed view of a stator using a conventional interphase insulation structure, FIG. FIG. 4 is a plan view showing another embodiment of the interphase insulating plate according to the present invention, and FIG. 5 is a side view showing a winding method for a motor using the interphase insulating structure according to the present invention. , FIG. 6 is a perspective view of the main part showing the winding method of FIG. 5. 1... Stator core, 2... First phase coil, 3... Second
Phase coil, 5... interphase insulating plate, 6... notch, 7... small protrusion.

Claims (1)

[Claims] 1 The interphase insulating plate is formed into an annular shape with a diameter close to the inner diameter of the stator core, and notches are provided radially from the outer diameter side of this annular interphase insulating plate, and the width of the outer diameter side of this notch is Wider than the tip of the notch,
The tip of the notch is formed into an arc shape, and the interphase insulating plate is inserted between the motor winding phases with the inner diameter side facing the stator core side, thereby performing interphase insulation treatment between different phase windings of the motor winding. In the interphase insulating plate of an electric motor, the inner diameter of the annular interphase insulating plate is formed into an oval or elliptical shape in the direction of the central axis of the notch on the outer diameter side, and at least a pair of small holes are formed in the short axis direction of this oval. An interphase insulating plate for an electric motor, characterized by being provided with a protrusion.