JPH0416403Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to an insulating bobbin, and more particularly to an insulating bobbin that is interposed between a salient pole of a rotor core of a rotating electrical machine and a coil to insulate the coil from the core.

[Summary of the idea]

In the present invention, a rib is provided on the side end surface of the bobbin in the axial direction to insulate the coils wound with different polarities from each other. This prevents the coils from coming into contact with each other or being electrically conductive with each other.

[Conventional technology]

Generally, in a rotor of a salient pole type generator, a coil is wound around the salient pole portion via an insulating bobbin. This increases the withstand voltage of the coil. Furthermore, by forming a sleeve on the side end surface of the bobbin, consideration has been given to providing insulation between the coil and the rotor shaft.

[Problem that the invention attempts to solve]

As described above, the conventional bobbin was mainly intended to insulate the coil and the core, and did not have the function of insulating the coils wound with different polarities from each other. However, due to the molding at the coil end, the coils of different poles come into contact or are pressed together, resulting in problems such as a decrease in the durability of the insulation or a decrease in reliability. Particularly in rotors with four or more poles, adjacent coils often come into contact with each other, causing problems as described above. The present invention was developed in view of these problems, and it is an object of the present invention to provide an insulating bobbin that can also insulate coils wound between different poles. .

[Means to solve the problem]

The present invention provides a rotating electric machine in which coils are wound around salient poles of a rotor core via insulating bobbins, in which auxiliary poles are installed between adjacent salient poles to separate the coils wound around each salient pole. furthermore, the surface of the auxiliary pole is also covered with the insulating bobbin, and a rib extending in the radial direction is formed on the axial side end surface of the auxiliary pole so as to extend from the insulating bobbin, The ribs insulate the axial ends of the coils wound around adjacent salient poles.

[Effect]

Therefore, according to the present invention, the coils wound around adjacent salient poles are separated from each other at the coil ends by ribs provided on the side end surfaces of the insulating bobbin that cover the surface of the auxiliary poles. This makes it possible to ensure insulation between the coils.

【Example】

1 to 4 show a rotor of a salient pole generator according to a first embodiment of the present invention, and FIG.
As shown in the figure, a rotor core 10 is fixed to the rotor shaft 9. The rotor core 10 is made by laminating a large number of magnetic steel plates in the axial direction, and has four magnetic steel plates laminated in the axial direction.
Two salient poles 11 and 12 are provided. In the generator of this embodiment, two poles are magnetized to have different polarities, for example, the salient pole 11 is magnetized to the north pole, and the salient pole 12 is magnetized to the south pole. There is. An auxiliary pole 13 is placed between the salient poles that are magnetized with the same polarity, and a auxiliary pole 13 is placed between the salient poles that are magnetized with the same polarity.
Auxiliary poles 14 are provided between the two salient poles. A rotor coil 16 is wound around the salient poles 11 and 12 via a bobbin 15 made of a synthetic resin molded body. Next, the structure of the bobbin 15 will be explained.
As shown in FIGS. 1 and 2, this bobbin 15
The bobbin is made of synthetic resin and is divided into two parts each having an angle of 180° in the circumferential direction, and these parts are combined to form a 360° bobbin.
A sleeve 18 is connected to the side end surface of the bobbin 15. The sleeve 18 is formed to surround the outer periphery of the rotor shaft 9, and the coil 16
The rotor shaft 9 is designed to be insulated from the rotor shaft 9. A lead wire guide section 19 is connected to the outer peripheral side of the sleeve 18, and the lead wire is drawn out through this guide section 19. Furthermore, a varnish guide 20 extending in the circumferential direction is formed on the side end surface of the bobbin 15 so as to protrude in the axial direction. This guide 20 is the coil 1
This is to prevent the varnish impregnated into the coil 16 from dripping and to reliably guide the varnish into the coil 16. Furthermore, in the bobbin 15 according to this embodiment, insulating ribs 21 are formed extending in the radial direction at positions corresponding to the auxiliary poles 13 and 14 on the side end faces thereof. These ribs 21 insulate the coils 16 wound around different salient poles 11 and 12. Therefore, with such a bobbin 15, it is not only possible to insulate the coil 16 around the core 10, but also insulate the coil 16 from the shaft 9 by means of the sleeve 18. becomes possible. Furthermore, since the insulating ribs 21 are provided on the side end faces, insulation between the coils 16 is also possible. This condition is particularly illustrated in FIG. 3, where when attempting to form the coils 16 at the ends of the rotor, the coils 16 of different poles tend to touch or press against each other. However, even if such molding is performed, the insulating ribs 21
Since adjacent coils 16 are partitioned by , the coils 16 wound with different polarities are reliably insulated, and it is possible to improve the durability and reliability of the insulation between the coils. become. In the above embodiment, the sleeve 18 and the varnish guide 20 are provided on the side end surface of the bobbin 15, but these are not necessarily necessary and can be omitted as appropriate.
Further, if the sleeve 18 is omitted, the lead wire guide portion 19 may be provided directly on the side end surface of the bobbin 15, and this also makes it possible to reliably guide the lead wire. Next, a second embodiment will be explained with reference to FIGS. 5 to 8. In this embodiment, parts corresponding to those in the first embodiment are given the same reference numerals, and descriptions of parts having the same structure will be omitted. A feature of the second embodiment is that a fastener 25 is integrally connected to the side end surface of the bobbin 15 via a thin wall portion 24. And Fuasuna 25
A protrusion 26 is formed on both sides of the fastener 25, and a locking portion 27 for locking the tip of the fastener 25 is provided in the vicinity thereof. When securing the coil 16 with such a fastener 25, the fastener 25 is cut and raised by the thin portion 24. In this state, the coil 16 is connected to the bobbin 1 as shown in FIGS. 7 and 8.
5 and is wound around the salient poles 11 and 12. After winding the coil 16, the tip of the fastener 25 is locked by the locking part 27, so that the wound coil 16 is fixed by the fastener 25. Also in this embodiment, insulating ribs 21 similar to those in the first embodiment provide insulation between the coils 16.

[Effect of the idea]

As described above, in the present invention, auxiliary poles are provided between adjacent salient poles so as to partition the coils wound around each salient pole, and the surfaces of the auxiliary poles are also covered with the insulating bobbin. , a rib extending in the radial direction from the insulating bobbin is formed on the axial side end surface of the auxiliary pole, and the rib extends in the axial direction of the coils wound around the adjacent salient poles. The side ends are insulated. Therefore, according to the present invention, even if the portions of the coil between adjacent salient poles that protrude from the axial side end surfaces of the auxiliary poles are pressed due to the forming at the coil ends, these do not come into contact with each other. This will be prevented by the insulating ribs, making it possible to improve the durability and reliability of the insulation between the coils.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts showing an insulating bobbin according to a first embodiment of the present invention, FIG. 2 is a front view of the same, and FIG.
The figure is a sectional view taken along the line ~ in Fig. 2, Fig. 4 is a sectional view of the rotor of a salient pole generator using this bobbin, Fig. 5 is an external perspective view of the bobbin of the second embodiment, and Fig. 6 7 is an external perspective view of the bobbin with a coil wound thereon, and FIG. 8 is a front view of the essential part. In addition, in the symbols used in the drawings, 10... rotor core, 11, 12... salient poles, 13, 14... auxiliary poles, 15... bobbin, 16... rotor coil,
21... Insulating rib.

Claims (1)

[Claim for Utility Model Registration] In a rotating electric machine in which a coil is wound around the salient poles of a rotor core via an insulating bobbin, salient poles that are adjacent to each other so as to separate the coils wound around each salient pole. An auxiliary pole is provided in between, the surface of the auxiliary pole is also covered with the insulating bobbin, and a rib extending in the radial direction is provided on the axial side end surface of the auxiliary pole so as to extend from the insulating bobbin. What is claimed is: 1. An insulating bobbin, characterized in that the ribs insulate the axial ends of coils wound around mutually adjacent salient poles.