JPH0623170Y2 - Rotating machine rotor - Google Patents

Description

Detailed Description of the Invention A. INDUSTRIAL APPLICABILITY The present invention relates to a rotor of an electric rotating machine having an inner rotor winding and an outer rotor winding, the coil end of the outer rotor winding is deformed by winding a binding wire, and The present invention relates to a structure for preventing the binding line from slipping off.

B. SUMMARY OF THE INVENTION The rotor of a rotating electric machine according to the present invention has different rotor windings inside and outside, the inner rotor winding has more poles than the outer rotor winding, and the outer rotor winding In a rotor in which the bind wire is wound around the coil end, the winding retainer provided on the rotating shaft supports the inner diameter side of the coil end of the outer rotor winding to apply tension to wind the bind wire. The coil end of the outer rotor winding is prevented from being deformed even when it is rotated, so that the coil end of the inner rotor winding does not need to be unnecessarily lengthened.

C. 2. Description of the Related Art In a rotor of a rotary electric machine, it is necessary to fix the conductor of the rotor winding so that the conductor of the rotor winding can withstand centrifugal force during rotation. As a method of fixing the conductor, there is a method of winding a bind wire around the outer circumference of the coil end of the rotor winding.

On the other hand, some rotary electric machines have different windings inside and outside the rotor. As an example, FIG. 3 shows a cross-sectional structure of a wire-wound electric motor. FIG. 4 shows the rotor in an enlarged manner. In these figures, a stator core 2 inside a stator frame 1 is attached, and a stator winding 3 is wound around the stator core 2. Covers 4 are attached to both ends of the stator frame 1, and bearings for supporting the rotating shaft 6 are attached to the cover 4. A rotor core 5 is attached to the rotary shaft 6 by a clasp 7, and an inner rotor winding 9 and an outer rotor winding 8 are wound around the rotor core 5. The axial length B of the coil end of the inner rotor winding 9 is generally shorter than the axial length A of the coil end of the outer rotor winding 8.

In order to prevent the inner and outer rotor windings 8 and 9 from being expanded and damaged in the outer diameter direction by centrifugal force during rotation,
The bind wire 10 is wound under tension on the coil end of the outer rotor winding 8.

By the way, since the rotor winding is made of a soft conductor such as a copper wire, the coil end of the outer rotor winding 8 is deformed by the tension of the bind wire 10, and the bind wire 10 slides down to prevent centrifugal force. The effect of may disappear.

For this reason, conventionally, the coil end length B of the inner rotor winding 9 is extended to a length equal to the coil end length A of the outer rotor winding 8 as shown by B'in FIG. The inner rotor winding 9 prevents the coil end of the rotor winding 8 from being deformed by the bind wire tension.

D. Problems to be Solved by the Invention By the way, when two or more different windings are provided on the rotor, the purpose is to change the rotation speed of the motor or the output frequency of the generator stepwise. because there is,
The number of poles of each rotor winding will be different.

When the number of poles is different, the inner rotor winding 9 having a larger number of poles than the outer rotor winding 8 is wound. The reason is that the coil end length B of the inner rotor winding 9 having many poles is
Is the coil end length A of the outer rotor winding 8 with a small number of poles
This is because the length can be made shorter and the winding process is easier.

However, as in the prior art, in order to prevent the coil end deformation of the outer rotor winding 8 when the bind wire 10 is wound, the axial length B ′ of the coil end of the inner rotor winding 9 should be the originally required length B. With the above, there arises a problem that the winding process is difficult and the heat loss increases by a long time.

In view of the above-mentioned prior art, the present invention provides a rotation method in which the coil end length of the inner rotor winding remains the originally required length and the coil end of the outer rotor winding can be prevented from being deformed by winding the bind wire. The purpose is to provide a child structure.

E. Means for Solving the Problems A rotor of a rotating electric machine according to the present invention which achieves the above-mentioned object has an inner rotor winding, a smaller number of poles than the inner rotor winding, and an axial length of a coil end. Has a longer outer rotor winding, and the binding wire is wound around the coil end of the outer rotor winding. A winding holder for supporting only the inner diameter side of the coil end of the outer rotor winding is provided at the end side position.

F. Action In the above configuration, the winding holder supports the force applied in the direction of deforming the coil end of the outer rotor winding due to the winding of the bind wire. Accordingly, the winding holder prevents the coil end of the outer rotor winding from being deformed without increasing the coil end length of the inner rotor winding.

G. Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 shows a rotor of a wire-wound electric motor, in which a rotor core 5 is attached to a rotary shaft 6 with a clamp 7 sandwiched between the rotor core 5 and two types of rotor windings having different numbers of poles. The wires 8 and 9 are wound. The number of poles of the winding is greater in the inner rotor winding 9 than in the outer rotor winding 8. Inner and outer rotor windings 8, 9
In both cases, the coil end lengths are proper proper lengths A and B according to the number of poles. Therefore, the axial coil end length B of the inner rotor winding 9 is shorter than the axial coil end length A of the outer rotor winding 8 (A> B).

Reference numeral 11 is a winding holder, which is made of a ring 12 and a support plate 13. A plurality of support plates 13 are radially fixed to the inner peripheral surface of the ring 12, and the roots of the support plates 13 are fixed to the rotary shaft 6 with bolts or the like. There are two winding holders 11, each of which is located on the rotary shaft 6 on the shaft end side of the left and right coil ends of the inner rotor winding 9 and corresponding to the left and right coil ends of the outer rotor winding 8. It is installed in.
The outer diameter of the ring 12 is set so as to come into contact with the inner diameter of the coil end of the outer rotor winding 9 with the insulator 14 interposed on the outer periphery thereof.

The bind wire 10 is wound under tension on the coil end of the outer rotor winding 8 with the winding holder 11 existing on the inner diameter side. Due to the presence of this winding holder 11,
Even if the bind wire 10 is wound, the coil end of the outer rotor winding 8 is not deformed, so that the bind wire 10 does not slide down, and the rotor windings 8 and 9 can be fixed against centrifugal force. it can.

In the above embodiment, the winding holder 11 includes the ring 12 and the support plate 1.
However, the present invention is not limited to these, and may be any as long as it has a portion that supports the inner diameter side of the coil end of the outer rotor winding 8 and a portion that is attached to the rotating shaft 6. good.

Further, in the above embodiment, only two inner and outer rotor windings are wound around the rotor iron core, but even when three or more rotor windings are wound, the rotor is similarly rotated by the winding holder. It is possible to prevent the coil end of the subsidiary winding from being deformed. Furthermore, the present invention can be applied to the rotor of a generator.

H. Effect of the Invention According to the present invention, the inner diameter side of the coil end of the outer rotor winding is supported by the winding holder provided on the rotating shaft.
Even if the coil end length of the inner rotor winding is not unnecessarily lengthened, the coil end of the outer rotor winding can be prevented from being deformed due to the binding wire winding. Also, since the coil end length of the inner rotor winding may be the original length, heat loss does not increase,
In addition, winding processing becomes easy.

[Brief description of drawings]

1 is a sectional view of a rotor according to an embodiment of the present invention, FIG.
1 is a view from the direction C in FIG. 1, FIG. 3 is a cross-sectional view of a conventional example of a wire-wound motor, and FIG. 4 is an enlarged view of the rotor in FIG. In the drawings, 5 is a rotor core, 6 is a rotary shaft, 7 is a rotor clamp, 8 is an outer rotor winding, 9 is an inner rotor winding, 10 is a bind wire, 11 is a winding holder, 12 Is a ring, 13 is a support plate, and 14 is an insulator.

Claims (1)

[Scope of utility model registration request] 1. A coil end of an outer rotor winding having an inner rotor winding and an outer rotor winding having a smaller number of poles and a longer axial length of the coil end than the inner rotor winding. In the rotor of a rotating electrical machine in which the bind wire is wound around, the inner diameter side of only the coil end of the outer rotor winding is supported on the rotation axis at a position closer to the shaft end than the coil end of the inner rotor winding. A rotor of a rotating electric machine provided with a winding holder.