JP2959199B2 - Stator coil conductor of rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator coil conductor housed in a stator core groove of a rotating electric machine.

FIG. 3 is an exploded perspective view of a main part of a stator core of a rotating electric machine and a stator coil housed in a core groove. In the figure, an even number of iron core grooves 2 are perforated in the inner periphery of the stator core 1, and a stator coil 30 shaped like a turtle as shown in FIG. Although only one turn of the stator coil is shown in the drawing, the stator coil 30 formed in a turtle-shape is actually housed in an iron core groove in a wrapped state.

The conductor of this stator coil is in a state as shown in the cross-sectional view of FIG. 4, and is formed in a bundle shape by laminating insulation-covered winding wires (hereinafter sometimes simply referred to as wires) 4. A cooling tube bundle formed by stacking hollow tubes for cooling (hereinafter, may be simply referred to as cooling tubes) 5 is positioned adjacent to the bundled wires, and further adjacent to the bundle of wires. It is configured so that the strands of the same shape and stacking stage are located.
The cooling pipe 5 is provided for dissipating and cooling Joule heat generated when the element wire 4 is energized.

[0004]

In the stator coil conductor configured as described above, the height of the wire bundle does not match the height of the cooling tube bundle due to the capacity of the rotating electric machine and the specifications of the wires 4. 4 shows a case where the height of the cooling tube bundle is lower than the height of the wire bundle, and FIG. 5 shows a case where the height of the cooling tube bundle is higher than the height of the wire bundle. In the case of FIG. 4, in order to match the height of the cooling tube bundle with the height of the strand bundle, FIG.
As shown in (1), an insulating liner 6 is inserted between the wires 4 to form a wire bundle. In the case of FIG. 5, a cooling pipe bundle is formed by inserting an insulating liner 6 for each cooling pipe 5.

[0005] The stator coil conductor thus formed has a substantially rectangular cross section and can be accommodated in the iron core groove exactly. However, when this is formed, the insulating liner shifts or pops out, making it difficult to manufacture the coil. there were.

[0006] In view of the above problems, an object of the present invention is to provide
An object of the present invention is to provide a stator coil conductor of a rotating electric machine which has no problem in molding.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a plurality of rows of insulating-coated winding wires are stacked in a plurality of stages to form a bundle, and a cooling medium is provided between the rows of insulating-coated winding wire bundles. In a stator coil conductor of a rotating electric machine in which a plurality of hollow tubes are stacked and arranged in a bundle, an insulating liner for height adjustment is interposed between each insulation-coated winding wire in the same bundle row, and this insulation is performed. Match the height of the covered coil bundle with the height of the hollow tube bundle for cooling,
This is achieved by winding the outer periphery of each of the insulated wire bundles with a protective tape. Furthermore, this purpose
According to the present invention, a plurality of rows of insulating-coated winding wires are stacked in a plurality of stages to form a bundle, and a plurality of cooling hollow tubes are stacked in a stack between the insulating-coated winding wire bundles and arranged in a bundle. In the stator coil conductor of the rotating electric machine, an insulating liner for adjusting the height is inserted between the cooling hollow tubes in the same bundle row, and the height of the cooling hollow tube bundle and the height of the insulation-coated winding wire bundle are increased. This can also be achieved by making the outer periphery of each bundle of cooling hollow tube bundles with a protective tape. At this time, it is advantageous to use a heat-resistant thin tape such as a polyester fleece tape as the protective tape.

[0008]

The stator coil conductor is formed by stacking a plurality of rows of insulated wire windings in a plurality of layers to form a bundle, and stacking a plurality of cooling hollow tubes between the insulated wire wound bundles to form a bundle. Placed in a shape,
In the whole formed by winding with a tape, the insulating liner is inserted between each insulating coated winding wire in the same bundle row or between each cooling hollow tube and the height of the insulating coated winding wire bundle is adjusted. Since the height of the hollow tube bundle is matched and the wire bundle or hollow tube bundle inserted with this insulating liner is wound with protective tape, the insulating liner may shift or pop out when it is formed into a coil. There is no.

[0009]

FIG. 1 is a sectional view of a stator coil conductor according to an embodiment of the present invention, in which a protective tape 7 is wound around the outer circumference of a wire bundle of the stator coil conductor 3 shown in FIG. As the protective tape 7, a thin tape having heat resistance such as polyester fleece tape is used, and the width and the height of the wire bundle are set to such a size that the stator coil 3 can be accommodated in the core groove. Has become.

FIG. 2 shows a state in which a protective tape 7 is wrapped around the outer periphery of the cooling tube bundle of the stator coil conductor shown in FIG. 7, and the same tape is used as the protective tape 7, and the width and height dimensions of the cooling tube bundle are used. Is set so as not to increase as much as possible so that the stator coil 3 can be accommodated in the iron core groove.

[0011]

Effects of the Invention to form a wire bundle or cooling tube bundle by inserting a liner for dimensional adjustment in strands or cooling tube during manufacture of the stator coil conductor in the present invention, for each column of the wire bundle or cooling tube bundle by winding the protective tape on the outer periphery thereof, displacement of the insulating liner during the molding of the stator coil, the quality of the uniform width dimension, the stator coils enables integral molding of height while preventing the jumping out stable I do.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a stator coil conductor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a stator coil conductor according to another embodiment of the present invention.

FIG. 3 is an exploded perspective view of a main part of a stator core of a rotating electric machine and a stator coil housed in a core groove;

FIG. 4 is a cross-sectional view of a conventional stator coil conductor.

FIG. 5 is a sectional view of a conventional different stator coil conductor.

6 is a sectional view of the stator coil conductor shown in FIG. 4 with a liner inserted between the strands.

FIG. 7 is a cross-sectional view showing a state where a liner is inserted between cooling tubes of the stator coil shown in FIG. 5;

[Explanation of symbols]

 3 Stator coil conductor 4 Element wire 5 Cooling pipe 6 Insulating liner 7 Protective tape

Claims (3)

(57) [Claims] 1. A rotating apparatus comprising: a plurality of rows of insulation-coated winding wires stacked in a plurality of stages to form a bundle; and a plurality of cooling hollow tubes stacked in a stack between the insulation-coated winding wire bundles and arranged in a bundle. In the stator coil conductor of the electric machine, an insulating liner for adjusting the height is inserted between each of the insulated winding wires in the same bundle row, and the height of the insulated winding wire bundle and the height of the cooling hollow tube bundle are adjusted. A stator coil conductor for a rotating electric machine , wherein the outer periphery of each of the insulated winding element wire bundles is wound with a protective tape. 2. A rotating apparatus comprising: a plurality of rows of insulation-coated winding wires stacked in a plurality of stages to form a bundle; and a plurality of cooling hollow tubes stacked in a stack between the insulation-coated winding wire bundles and arranged in a bundle. In the stator coil conductor of the electric machine, an insulating liner for adjusting the height is inserted between the cooling hollow tubes in the same bundle row, and the height of the cooling hollow tube bundle and the height of the insulating coated winding wire bundle are adjusted. Wherein the outer circumference of each cooling hollow tube bundle is wound with a protective tape for each row . 3. The stator coil conductor of a rotating electric machine according to claim 1, wherein the protective tape is a polyester fleece tape .