JPH0436216Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to the stator of a rotating electric machine, and in particular, a ring-shaped stator yoke is provided with a pole protruding toward the center on the inner circumferential surface of the stator yoke, and the stator coil is attached to this pole. The present invention relates to a stator in which the coils are wound in the slots between the poles and the coils are held down by coil holders.

〓Summary of the invention〓 This invention provides an auxiliary pole between the coils wound around the poles on both sides at the middle position of the slot. One end of the coil holder is locked, and the other end of the coil holder is locked with an auxiliary pole, thereby shortening the length of the coil in the axial direction and increasing the length of the coil holder. This reduces the strength and further secures adjacent coils to each other.

〓Conventional technology〓 For example, in an armature rotating type generator, the third
As shown in FIG. 4 and FIG.
The stator coil 3 was wound around the stator coil 3.
This stator coil 3 constitutes a field coil, and is arranged in slots 4 on both sides of the pole 2. In order to facilitate attachment of the stator coil 3 to the pole 2, the pole 2 has a straight shape without forming a protrusion on the side on the tip side. Therefore, in order to hold down the stator coil 3, a coil presser 5 is attached between a pair of adjacent poles 2.

Problems to be Solved by the Invention According to such a straight pole 2, the stator coil 3 can be easily inserted as described above, but the coil presser 5 is required. Furthermore, in order to prevent the coil holder 5 from interfering with the rotor, it was necessary to arrange the coil holder 5 inside the slot 4, that is, on the outer peripheral side in the radial direction. Therefore, as shown in FIG. 4, the stator coil 3 must be formed into a horizontally long and flat shape, and for this reason, the coil 3 becomes long in the axial direction of the generator. That is, there was a drawback that the value of L shown in FIG. 4 became large. However, a space 6 is formed between the pair of stator coils 3 in the middle part of the slot 4, and this space 6 not only constitutes an extra space, but also causes the coil 3 to easily wobble. There was a drawback.

The present invention has been developed in view of these problems, and aims to shorten the length of the stator coil in the axial direction and provide a stator in which the stator coil is securely fixed. It is something to do.

〓Means for solving the problem〓 The present invention provides a pole on the inner circumferential surface of a ring-shaped stator yoke so as to protrude toward the center, and a stator coil is wound around this pole.
In a stator in which the coil in the slot between the poles is held down by a coil holder, an auxiliary pole is provided between the slots and between the coils wound around the poles on both sides, and the coil is held down by a coil holder. One end of the coil holder is locked by the side portion of the wrapped pole, and the other end of the coil holder is locked by the auxiliary pole.

〓Effect〓 Therefore, according to the present invention, since the coil holder is locked by the auxiliary pole arranged in the middle part of the slot, it becomes possible to arrange the coil holder on the center side. Therefore, there is no need to flatten the shape of the coil. For this reason, the length of the coil in the axial direction becomes shorter. Furthermore, since the length of the coil presser is shortened, its strength can be reduced. Furthermore, since there is no space between the pair of coils within the slot, the coils can be securely fixed.

〓Example〓 The present invention will be described below with reference to an illustrated example.
FIGS. 1 and 2 show a stator of an armature rotating type generator according to an embodiment of the present invention, and this stator is equipped with a stator yoke 10. FIG. The stator yoke 10 has a substantially ring-shaped structure, and has 6
poles 11, these poles 1
A stator coil 12 is wound around each of the stator coils 1 . Note that this stator coil 12 constitutes a field coil. The stator coils 12 are bound at predetermined positions by binding wires 13, and are connected to each other by wire rods. Furthermore, the lead wires 14 connected to these coils 12 are connected to an external circuit via a coupler 15.

A slot 16 is formed between each of the six poles 11, and the stator coil 12 wound around the poles 11 on both sides is inserted into the slot 16.
It is designed to pass through the inside. Further, an auxiliary pole 17 is formed within the slot 16 at a position approximately in the middle thereof, between the coils 12 wound around the poles 11 on both sides. The height of this auxiliary pole 17 is lower than that of the above-mentioned pole 11, and a large air gap is formed between it and the rotor to prevent leakage of magnetic flux. The other end of the coil presser 18, one end of which is locked by the side of the pole 11, is locked by the auxiliary pole 17.
The stator coil 12 passing through the coil 6 is held down.

Therefore, according to the stator of the generator having such a structure, since the coil holder 18 is formed in the middle position of the slot 16, the mounting position of the coil holder 18 is arranged closer to the center than in the conventional stator. becomes possible. Therefore, the stator coil 12
It becomes possible to make the cross-sectional shape of the cross-sectional shape not a flat shape but a substantially square shape as shown in FIG.
This makes it possible to reduce the height of the coil 12 and reduce the length L' of the stator in the axial direction. This makes it possible to configure the generator compactly. Furthermore, by providing the auxiliary pole 17 at the middle position of the slot 16,
The length of the coil holder 18 is less than half that of a conventional coil holder, which makes it possible to sufficiently achieve the purpose with a coil holder with low strength. Therefore, when using the same material, it is possible to reduce the thickness of the coil holder 18 and widen the effective space of the slot 16. In addition, there is an auxiliary pole 1 in the middle position of the slot 16.
7 makes it possible to eliminate wasted space between the coils 12 within the slot 16, thereby making it possible to securely fix the coils 12.

〓Effect of the invention〓 As described above, the present invention provides an auxiliary pole between the coils wound around the poles on both sides at the middle position of the slot. One end of the coil holder is locked by the side part, and the other end of the coil holder is locked by an auxiliary pole. According to such a configuration, it is possible to reduce the axial dimension of the coil, and furthermore, it is possible to achieve the purpose with a coil holder with low strength, and it is also possible to securely hold the coil. can be fixed to.

[Brief explanation of the drawing]

Fig. 1 is a front view of a stator of a generator according to an embodiment of the present invention, Fig. 2 is a partially cutaway side view of the stator, Fig. 3 is a front view of main parts of a conventional stator, and Fig. 4. is a sectional view of the same main part. In addition, in the reference numerals used in the drawings, 10... stator yoke, 11... pole, 12... stator coil, 16... slot, 17... auxiliary pole, 18... coil holder.

Claims (1)

[Scope of utility model registration request] A stator in which a pole is provided on the inner peripheral surface of a ring-shaped stator yoke so as to protrude toward the center, a stator coil is wound around the pole, and the coil is held in the slot between the poles with a coil holder. In this case, an auxiliary pole is provided between the coils wound around the poles on both sides at an intermediate position of the slot, and one end of the coil presser is secured by the side of the pole around which the coils are wound. A stator for a rotating electrical machine, characterized in that the stator of the rotating electric machine is locked with the coil presser, and the other end of the coil presser is locked with the auxiliary pole.