JPH06105494A - Field winding for salient pole type synchronous machine - Google Patents

Abstract

PURPOSE:To enhance the cooling effect of a field winding by adhering an inner winding to an outer winding via a space piece, and forming a vent groove between the inner winding and the outer winding. CONSTITUTION:A field winding 2 is divided into an inner winding 2a wound on a pole core 1, and an outer winding 2b wound on the outside of the winding 2a, and a plurality of space pieces 9 are inserted between the windings 2a and 2b. The windings 2a, 2b are adhered integrally with the pieces 9, and the ends are supported to falling preventive member 4. Thus, the windings 2 do not fall. Further, a vent groove 10 is formed between the windings 2a, 2b, and cooled from the inside of the winding 2 via the groove 10 in addition to cooling from the outside of the winding 2. Thus, the cooling effect of the windings 2 can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field winding that is doubly wound around a magnetic pole core of a salient pole type synchronous machine.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view of a magnetic pole of a conventional salient pole type synchronous machine, and FIG. 5 is a sectional view taken along line VV of FIG. The conventional field winding 2 is formed by cutting a strip of a rectangular copper strip into strips, welding the strips, and forming a coil shape with the interlayer insulation 6 interposed therebetween. The field winding 2 is incorporated into the magnetic pole core 1 with the insulating plate 5 sandwiched between the magnetic pole head and the magnetic pole body 3, and the magnetic field winding 2 is made of resin and dropped at the magnetic pole core base. Preventing material 4 by magnetic pole iron core 1
To support. A centrifugal force acts on the field winding 2 with the rotation, but the field winding 2 is supported by the head of the magnetic pole core 1. Since the temperature rises when the field winding 2 is energized for operation, the field winding 2 must be cooled. Conventionally, since the cooling wind 11 flows along the side surface of the field winding 2 with rotation, the outside of the field winding 2 is cooled but the inside is not cooled. The thick arrow indicates the direction of rotation of the magnetic pole.

[0003]

Conventionally, since the field winding 2 is cooled by ventilation from the outside, the inside cooling is insufficient and the cooling efficiency is poor, and the temperature rise is kept within a specified value. When the copper band cross-sectional area of the field winding 2 is increased so as to reduce the loss generated in the field winding, a large amount of copper material is required, and the rotating electric machine becomes heavy and costly. . Moreover, in order to increase the cooling air volume, the cooling fan had to be upsized.

An object of the present invention is to provide a field winding of a salient pole type synchronous machine which has improved cooling efficiency without increasing the copper strip cross-sectional area of the field winding.

[0005]

In a field winding of a salient pole type synchronous machine in which a rectangular copper strip is wound around a magnetic pole iron core, an inner winding wound around the magnetic pole iron core and an outer side of the inner winding are wound around the magnetic pole iron core. An outer winding to be wound, and a plurality of spacing pieces each having a rectangular cross section, which are inserted between the inner winding and the outer winding in the stacking direction of both windings. The above object is achieved by bonding the winding and the outer winding to each other and forming a ventilation groove between the inner winding and the outer winding.

If the spacing piece is composed of a glass laminated plate and glass wool wrapped around the glass laminated plate and impregnated with resin, the inner winding and the outer winding can be bonded together. It is suitable.

[0007]

According to the present invention, the field winding is divided into an inner winding wound around the magnetic pole core and an outer winding wound outside the inner winding, and the inner winding and the outer winding are divided. A plurality of spacing pieces are inserted between the wire and the inner winding and the outer winding are adhered to each other by the spacing pieces to be integrated, and the ends thereof are supported by the fall prevention material. It never falls. Further, a ventilation groove is formed between the inner winding and the outer winding, and in addition to cooling from the outside of the field winding, cooling is performed from the inside of the field winding through the ventilation groove. Enhance the cooling effect of.

[0008]

1 is a sectional view of a magnetic pole of a salient pole type synchronous machine having a field winding according to an embodiment of the present invention, and FIG. 2 is a line II-II of FIG.
FIG. In FIGS. 1 and 2, the same parts as those in FIGS. 3 and 4 are denoted by the same reference numerals. The field winding 2 according to the embodiment of the present invention includes an inner winding 2a wound around the magnetic pole core 1, an outer winding 2b wound outside the inner winding 2a, an inner winding 2a and an outer winding. It is composed of a spacing piece 9 inserted between the wire 2b and the windings 2a and 2b in the stacking direction. Spacing piece 9
Is composed of a glass laminated plate 7 having a rectangular cross section and a glass wool 8 wrapping around the glass laminated plate 7 and impregnated with a resin. Interlayer insulation 6 is provided between the inner winding 2a and the outer winding 2b. Since the glass wool 8 forming the spacing piece 9 is impregnated with resin, the inner winding 2a and the outer winding 2b can be bonded to each other to be integrated. Since the end portion of the inner winding 2a is supported by the fall prevention material 4, the field winding 2 does not fall. Further, since the ventilation groove 10 is formed between the inner winding 2a and the outer winding 2b, and the groove 5a is provided in the insulating plate 5, the cooling air 1 is rotated as the magnetic pole core 1 rotates.
Since 1 circulates the outside of the outer winding 2b and the ventilation groove 10 to cool the field winding 2 from both the inside and the outside, the cooling area can be increased and the cooling efficiency can be improved. Since the magnetic pole insulation 3 and the insulating plate 5 are the same as those in the conventional art, the description thereof will be omitted. FIG. 3 is an enlarged view of part III in FIG. Inner winding 2a
The spacing piece 9 is inserted between the outer winding 2b and the outer winding 2b, and the ventilation groove 10
Was formed. The spacing piece 9 is formed by wrapping the periphery of the glass laminated plate 7 with glass wool impregnated with resin.

[0009]

According to the present invention, the field winding is divided into an inner winding and an outer winding, and a space piece is inserted between the two to prevent the field winding from falling and prevent the falling. Since a ventilation groove is formed in and the cooling air cools the outside and the inside of the field winding as the magnetic pole rotates, the cooling efficiency is improved and the salient pole type synchronous machine can be miniaturized.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of magnetic poles of a salient pole type synchronous machine including a field winding according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged view of a part III in FIG.

FIG. 4 is a cross-sectional view of magnetic poles of a conventional salient pole type synchronous machine.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols] 1 magnetic pole core 2 field winding 2a inner winding 2b outer winding 3 magnetic pole insulation 4 fall prevention material 5 insulating plate 7 glass laminated plate 8 glass wool 9 spacing piece 10 ventilation groove

Claims (2)

[Claims] 1. A field winding of a salient-pole type synchronous machine in which a rectangular copper strip is wound around a magnetic pole core, and an inner winding wound around the magnetic pole core and an outer winding of the inner winding. An outer winding, and a plurality of spacing pieces having a rectangular cross section, which are inserted between the inner winding and the outer winding in the stacking direction of both windings, and are formed by the spacing pieces. A field winding of a salient pole type synchronous machine characterized in that an outer winding is adhered to each other and a ventilation groove is formed between the inner winding and the outer winding. 2. The field winding of a salient pole type synchronous machine according to claim 1, wherein the spacing piece is composed of a glass laminated plate and glass wool wrapped around the glass laminated plate and impregnated with resin. Field winding of salient pole type synchronous machine.