JPH05344671A - Salient pole type rotor of dynamo-electric machine - Google Patents

Abstract

PURPOSE:To prevent the cutting of the interpole joint by the axial expansion and contraction by the thermal deformation of rotor winding during start or operation. CONSTITUTION:In an object which is equipped with a plurality of salient pole type iron cores 1 being set around a yoke 2 and having rotor windings wound around themselves, the joints 6 and 7 between the poles of the stator windings whose phases are adjacent to each other are arranged to connect them in axial direction. Hereby, an interpole connection is given flexibility, so it can absorb the expansion and contraction of the stator winding enough, and the cutting of the interpole connection can be prevented, and a highly reliable rotor can be gotten.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preventive measure against a breakage of a rotor winding connection between poles in a rotating machine such as a salient pole type synchronous machine.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional salient pole rotor, in which 1 is an iron core, 2 is a yoke, 3 is a rotor winding wound around an iron core, and 6a. , 7a are an upper lead and a lower lead that connect between the poles of each rotor winding 3.

Next, the operation will be described. In salient pole type synchronous motors, when three-phase alternating current is applied from the power supply to the stator winding,
A rotating magnetic field is generated in the stator, and the rotor magnetic pole is pulled by the starting winding provided on the magnetic pole head in the case of the laminated magnetic pole and the eddy current generated on the magnetic pole surface in the case of the block magnetic pole, and the magnetic pole is drawn into the rotating magnetic field to achieve the synchronous speed. Rotation rises to near. At this time, when a direct current is applied to the rotor winding, the rotor is synchronously pulled and the rotor rotates at a synchronous speed.

[0004]

Since the salient pole type rotor of the conventional rotary electric machine is constructed as described above, in the case of a heavy inertia load long starting time or an electric motor having a large number of starting times, the rotor winding is used. The wire has a problem that the temperature rises and the wire expands and contracts repeatedly in the axial direction, induces a large thermal stress in the inter-electrode connecting portion, and easily causes a breakage of the inter-electrode connecting portion.

The present invention has been made in order to solve the above-mentioned problems, and the rotor winding is formed by connecting the inter-pole joints of the rotor windings in the upper and lower joints in the axial direction. It is an object of the present invention to provide a salient-pole rotor of a rotating electric machine, which is flexible with respect to thermal deformation in the axial direction and can prevent large stress from being generated in the connecting piece.

[0006]

The salient pole type rotor of the rotary electric machine according to the present invention has a structure in which the pole-to-pole connection of the rotor windings has flexibility in the axial direction.

[0007]

According to the present invention, since the inter-electrode connecting portion follows the axial expansion and contraction due to the thermal deformation of the rotor winding during starting and running, a large stress is prevented from occurring in the inter-electrode connecting wire. To function.

[0008]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a salient pole type rotating machine of a rotating electric machine according to an embodiment of the present invention. In the drawings, 5 is a lower pole connecting wire, 7 is a lower winding of a rotor winding, and 9 is a lower winding. A holding member for supporting the lower inter-pole connecting wire, 10 is a lead connected to the positive ring J of the current collecting ring, and 11 is a lead connected to the negative ring K of the current collecting ring.

The upper lead of the rotor winding is provided on the opposite side of the lower lead 7, as shown in the side view of FIG. 1b. Four
Is a connecting wire between the upper electrodes, 6 is an upper lead, 8 is a holding member for supporting the connecting wire between the upper poles, and 12 is a binding string for fixing the upper lead.

Next, the operation will be described. The figure is illustrated with 6 poles for ease of explanation. First, the lower winding 7 of the rotor winding 3 is mounted on the yoke 2 so that the lower winding 7 is on the side of the current collecting ring (not shown). Then, the lower leads 7 of the rotor winding 3 are connected to each other by the lower inter-pole connecting wire 5, and the upper lead 6 on the opposite side is lowered to the lower side and connected by the upper inter-pole connecting wire 4.
As a result, by expanding and contracting the rotor winding 3 so that the pole-to-pole connection is in the axial direction, the upper and lower leads are bent flatly,
Since it has flexibility, it is possible to prevent breakage of the interelectrode connection. In addition, since the upper and lower leads of the rotor winding are provided from the opposite sides in the axial direction, the same number of rotor windings may be used.

[0011]

As described above, according to the present invention, by connecting the inter-pole connection of the rotor windings in the axial direction, the inter-pole connecting portion is provided with flexibility. There is an effect that expansion and contraction can be sufficiently absorbed, breakage of the inter-electrode connecting portion can be prevented, and a highly reliable rotor can be obtained.

[Brief description of drawings]

1 is a front view a of a main portion showing a salient pole rotor of a rotary electric machine according to an embodiment of the present invention, a side view b of FIG. 1a, and a front view c of FIG. 1b.

FIG. 2 is a winding schematic diagram a and a perspective view b of a rotor winding.

FIG. 3 is a front view a of a main part showing a salient pole type rotor of the related art, a perspective view b of an upper inter-pole connecting portion thereof and a perspective view c of a lower inter-pole connecting portion thereof.

FIG. 4 is a perspective view a and a winding schematic view b of a conventional rotor winding.

[Explanation of symbols]

 1 Iron core 2 Yoke 3 Rotor winding 4 Upper connecting wire between poles 5 Lower connecting wire between poles 6 Top lead out 7 Bottom lead

Claims (1)

[Claims] 1. A rotary electric machine comprising: a yoke attached to a rotating shaft; and a plurality of salient pole-shaped iron cores fitted around the yoke and having rotor windings wound around the yoke. A salient-pole rotor of a rotary electric machine, characterized in that, in the salient-pole rotor, the connection between the poles of adjacent rotor windings is connected in the axial direction.