JPH02269430A - Salient-pole rotor for rotary electric machine - Google Patents

Abstract

PURPOSE:To stabilize mas-productivity and quality by winding a plurality of coils to be fitted on a plurality of salient-pole sections, all by the use of a machine. CONSTITUTION:On a plurality of salient-pole sections 12, 14, the first salient sections 12 are formed integrally with a yoke section 11, and a plurality of other salient-pole sections are formed separately from the yoke section 11 and are formed as the second salient-pole sections 14 to be fixed on the yoke section 11. Then, on the first salient-pole sections 12, coils 15A are fitted by winding with the use of a machine, and on the second salient-pole sections 14, coils 15B are contrived to be retained by win ding without using hands. As a result, all the coils 15A, 15B of the salient-pole sections 12, 14 can be wound up by using the machine, and mass-productivity can be enhanced, and the quality of the coils 15A, 15B can be uniformized.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of a convex pole rotor for a rotating electric machine.

[Conventional technology]

As shown in Fig. 6, a method of winding a convex pole rotor coil of a rotating electric machine, for example, a field coil of a synchronous generator with a small coil diameter, is as shown in Fig. 6. A coil conductor 4 is attached to a convex pole part 3 that projects radially from a yoke part 2.
Direct winding (in which the coil 5 is attached by winding the coil 5 directly by hand)
As shown in Fig. 7, the rotor core 1
The convex pole part 3 was formed separately from the yoke part 2, and a mechanically wound coil 6 (Fig. 8 (b)) was fitted into the winding frame (Fig. 8 (T8)), and this coil 6 was attached. Connect the convex pole part 3 to the yoke part 2
There is a revolute yoke method that fits and fixes.

3A is the head of the convex pole portion 3, and 7 is a shaft hole into which a rotating shaft (not shown) is inserted. In the case of the revo-yoke method, dovetail grooves 8 are formed on the outer periphery of the yoke part 2 at predetermined intervals as shown in FIG. is fitted into this dovetail groove 8 and fixed.

[Problem to be solved by the invention]

In the case of a multi-pole rotor, the rotor can be made smaller and more compact by using the coil mounting method described above, but direct winding of the coil by hand is laborious and time-consuming, and the quality varies, as well as the need for revolute yoke. In the case of this method, as the number of poles increases, the effort and time required to attach the coil to the convex pole and the convex pole to the yoke increases, and both methods are unsuitable for mass production. In addition, when using the revo-yoke method, the fitting part between the convex pole part and the yoke part is mechanically weak, so there is a risk that this part will be damaged by centrifugal force, and the signal line will be damaged. There was a problem that there was not enough sex.

In addition, as described above, the convex pole part 3 is fixed to the yoke part 2 by fitting the dovetail projection 9 into the dovetail groove 8 of the yoke part 2, but simply fitting it will not make it possible to As shown in Figure 9, a gap G1 is created between the bottom of the dovetail projection 9 and the bottom of the dovetail groove 8, and a gap G2 is also created between the tapered parts.
Since the magnetic resistance caused by the gap deteriorates the electrical characteristics, as shown in FIG. Make sure there are no gaps between them,
Since the width W1 of the opening of the dovetail groove 8 is narrower than the pole width W2 of the convex pole part 3, when the cotter 30 is inserted, a gap shown by G3 is created as shown in the figure, and the magnetic flux is transferred to the narrow part of the dovetail projection 9. Since the light only passes through the magnetic field, magnetic saturation occurs, leading to deterioration of electrical characteristics.

Furthermore, in the case of a small rotating electric machine, since both the protrusion 9 and the dovetail groove 8 are small, the gap G1 is also small and is not large enough to drive in the cock, and driving in the cock is often abandoned. As a result, the above gap G which becomes magnetic resistance
2 occurs, and desired electrical characteristics cannot be obtained.

This invention was made to solve the above problem.
Compared to conventional methods, it is possible to significantly reduce the labor and time required for installing coils, increasing mass productivity, making the coil quality uniform, improving reliability, and further improving electrical reliability. An object of the present invention is to provide a convex pole rotor for a rotating electrical machine that can improve characteristics.

[Means to solve the problem]

In order to achieve the above object, the invention of claim 1 provides the following:
A plurality of the convex pole parts are connected to a first part integrally formed with the yoke part.
a convex pole part, and a plurality of other convex pole parts are formed separately from the yoke part and fixed to the yoke part by a fixing means.
The first convex pole part is equipped with a coil by mechanical winding, and the second convex pole part is provided with a coil by means of mustard winding.

The invention of claim 2 is such that the pole width of the convex pole portion and the opening width of the dovetail groove are substantially the same, and the invention of claim 3 is that the pole width of the convex pole portion is substantially the same as the opening width of the dovetail groove. A protrusion is formed, and the protrusion is configured to be crushed within the dovetail groove.

[Effect]

In the invention of claim 1, since the coils of all the convex pole parts can be mechanically wound and the revo-yoke method is only used for the first convex pole part, the revo-yoke method is applied to all the convex pole parts. Compared to the conventional case, it is possible to mass-produce it, and the quality of the coil can be made uniform, and the possibility of damage due to centrifugal force of the convex pole part can be reduced compared to the conventional case.

In the invention of claim 2, the fitting between the protrusion of the convex pole portion and the dovetail groove
Adhesion is improved compared to conventional products, and electrical characteristics are improved.

In the third aspect of the invention, the protrusion formed at the bottom of the dovetail-like protrusion serves as a cock, so even in the case of a small rotating electric machine, the gap between the protrusion and the dovetail groove can be reduced, and the electrical characteristics can be improved. improves.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 10 denotes a rotating iron core of an 8-pole convex pole rotor, which is integrally formed with a yoke part 11 and has four first convex poles protruding from the yoke part 11 in the radial direction. A core body 13 (shown in FIG. 2) having a portion 12, and four second convex pole portions that are formed separately from the core body 13 and are attached to the yoke portion 11 by fitting. It has 14. The first convex pole portions 12 are successively formed at 90° intervals. Yoke part 11
A dovetail groove 8 is formed on the outer periphery between the convex pole parts 12, and a dovetail-like projection 9 that can fit into the dovetail groove 8 is formed at the tail end of the second convex pole part 14. The pole portion 14 is attached to the yoke portion 11 by fitting the protrusion 9 into the corresponding dovetail groove 8.

As shown in FIG. 2, the first convex pole portion 12
The projecting direction of the convex pole portion 12 is the coil winding direction 4 indicated by the arrow.
For example, as shown in FIG. A device is provided in which the support shaft 16 is passed through the shaft hole 7 of the core body 13, the core body 13 is supported by a U-shaped rotation support frame 20, and the rotation shaft 21 of the support frame 20 is rotated in the direction of the arrow by a drive device (not shown). It is used for automatic winding.

The coil 15B of the second convex pole portion 14 is a coil automatically wound on a winding frame (Fig. 8) or a directly wound coil by a machine. After the coil 15B is inserted into the second convex pole part 14, the second convex pole part 14 is attached to the iron core body 13 in which the coil 15A is wound around the first convex pole part 12.

In this way, in this example, four of the eight pole coils can be automatically wound by a machine, so it is possible to use the conventional revo-yoke method as well as manual winding (Fig. 4). Compared to the case (FIG. 5), mass productivity can be improved and quality can be made more stable.

Furthermore, there is a risk that the convex pole part, which is attached to the yoke by fitting, may break due to the centrifugal force of the rotor, especially during high-speed rotation; however, in this example, among the eight poles, In the four poles, the convex pole part 14 is formed integrally with the yoke part 11, so
The risk of breakage due to the centrifugal force is extremely small.

By the way, when the dovetail projection 9 is fitted and fixed in the dovetail groove 8 of the yoke part 11 as in the second convex pole part 14, as explained with reference to FIG. 10, a gap G3 is created, This leads to deterioration of electrical characteristics.

FIG. 4 shows an embodiment of the second invention made to solve this problem. Instead of 9,
The protrusion 90 simply spreads out from the convex pole part 14, and the opening width W1 of the dovetail groove 8 is the same as the pole width W2 of the convex pole part 14. In this embodiment, since there is no constriction, the protrusion 90
Magnetic saturation is less likely to occur at the boundary between 0 and the convex pole portion 14, and the electrical characteristics are improved accordingly.

Further, in the case of a small rotating electric machine, as described above, the gap G2 (FIG. 9) which becomes magnetic resistance occurs, making it impossible to obtain desired electrical characteristics.

FIG. 5 shows a third embodiment of the invention made to eliminate this problem.

In FIG. 5, 91 is a small protrusion of low height provided at a symmetrical position in the width direction of the bottom of the dovetail-like protrusion 9;
It is manufactured so that the height Ll of the dovetail groove 8 is slightly higher than the groove height L2 of the dovetail groove 8.

When the convex pole part 14 having this protrusion 91 is fitted into the yoke part 11, the protrusion 91 functions as the above-mentioned cotter 30, and as shown in FIG. It is compressed and deformed by the bottom of the dovetail groove 8, and the dovetail projection 9 and the tapered portion of the dovetail groove 8 are brought into close contact with each other, similar to the above-mentioned cotter 30.

Note that the second invention and the third invention can be applied to a rotor in which all of the convex pole parts are separate from the yoke part.

〔Effect of the invention〕

As explained above, in the first invention, all the coils attached to the convex pole part can be mechanically wound, and only one part of the convex pole part uses the revolute yoke method, so it is compared to the conventional method. The second invention can improve mass production, stabilize quality, and improve reliability, and the second invention alleviates magnetic saturation at the connection part of the convex pole part with the yoke part compared to the conventional one. The third invention is particularly useful for small-sized rotating electric machines because the convex pole part and the yoke part can be tightly fitted together without using a cock. Effective in improving electrical characteristics.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the first invention, FIG. 2 is a diagram showing the core body of the rotor core in the above embodiment, and FIG.
The figure shows a part of the machine for winding the coil around the first convex pole in the above embodiment, FIG. 4 shows the main part of the second embodiment of the invention, and FIG. 5 shows the third part of the machine. 6 is a sectional view showing an example of a conventional rotor, and FIG. 7 is a sectional view showing an example of a conventional rotor.
The figure is a cross-sectional view of a rotor that uses the conventional revo-yoke method.
Figure 8 (al is a diagram in which the yoke part and the convex pole part of the rotor in Figure 7 are separated, Figure 8 (b) is a perspective view of a coil using a winding frame, Figures 9 and 10 are It is a diagram for explaining the problems of the conventional fitting between the dovetail projection and the dovetail groove. 8--Dovetail groove, 9 part dovetail projection, 11...-Yoke part, 1
2--First convex pole part, 13--Iron core body, 14--Second convex pole part, 15A, 15B--Coil, 90-Protrusion,
91- Protrusion. Fig. 3 Fig. 4 9o--Itsutsushin Fig. 5 9] - ¥ 6 Fig. 7 Fig. 8 Fig. CG) (b) Fig. 9 Fig. 10

Claims (3)

[Claims] (1) A plurality of first poles in which the convex pole part is integrated with the yoke part
and a plurality of second convex pole parts formed separately from the yoke part and fixed to the yoke part by a fixing means after the coil is installed, A convex pole rotor for a rotating electric machine, wherein the coil attached to the first convex pole part is a coil wound around the convex pole part by non-hand winding means. (2) In a convex pole rotor having a convex pole part formed separately from the yoke part and having a protrusion that fits into a dovetail groove of the yoke part, the width of the convex pole part and the dovetail shape A convex pole rotor for a rotating electrical machine, characterized in that the opening widths of the grooves are substantially the same. (3) In a convex pole rotor that is formed separately from the yoke part and has a projection that fits into a dovetail groove of the yoke part, a plurality of projections are formed at the bottom of the projection, and a plurality of projections are formed at the bottom of the projection. A convex pole rotor for a rotating electrical machine, wherein the protrusions receive a pressing force within the dovetail groove.