JPH09135550A - Salient-pole field of rotary machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote the heat radiation of a field coil and lessen the increase in temperature of the coil by installing insulating plates in a space between a salient-pole iron core and the field coil and filling all the spaces between these members with a filler for forming the salient-pole iron core and the field coil into an integral unit. SOLUTION: A salient pole 1 is made by locating a field coil 2 around a salient-pole iron core 1a. The field coil 2 is made by winding a copper belt 3 around the salient-pole iron core 1a and installing turn insulating plates 4 between the turns of the wound copper belt 3. Then, all the spaces formed between the salient-pole iron core 1a and the field coil 2 including a non-contact section between the field coil 2 and insulating plates 7, a space between an insulating sheet 6 and the insulating plates 7, and a space between the insulating plates 7 are filled with fluid rubber. The fluid rubber is then heated and hardened to form the salient-pole iron core 1a and the field coil 2 into an integral unit. By this method, the heat radiation of the field coil 2 can be promoted and the increase in temperature of the field coil 2 can be lessened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a salient pole field of a rotor of a rotary electric machine.

[0002]

2. Description of the Related Art A description will be given below with reference to FIGS. A salient pole field of a rotating electric machine is configured by winding a field coil 2 around a magnetic pole 1. The magnetic pole 1 is composed of a magnetic pole core 1a and a magnetic field coil 2, and is composed of a magnetic pole core end portion 1b that suppresses radial movement of the magnetic field coil 2 due to centrifugal force. A copper strip 3 is wound around 1a, and a turn insulating material 4 (for example, DuPont Nomex) is provided between the wound copper strips 3, that is, between turns.
Is provided. Further, an insulating collar 5 is arranged between the field coil 2 and the magnetic pole core end portion 1b, and the field coil 2
An insulating sheet 6 for ground insulation is inserted in the gap between the magnetic pole core 1a and the magnetic pole core 1a. The gap between the field coil 2 and the magnetic pole core 1a is larger than the thickness of the insulating sheet 6 due to manufacturing problems. Therefore, a plurality of insulating plates 7 typified by epoxy glass laminated plates are stacked and inserted in this gap to fix the field coil 2 to the magnetic pole core 1a.

[0003]

However, the gap between the field coil 2 and the magnetic pole iron core 1a is not always uniform, and the gap between the copper strips 3 of the field coil 2, that is, between turns is partially about several millimeters. May occur due to variations in the thickness and width of the copper strip 3 itself or from the viewpoint of manufacturing. When a plurality of insulating plates 7 are inserted in this gap, the field coil 2 and the insulating plate 7 do not have an ideal overall surface contact, and a point contact or a non-contact part is partially generated to cause a slight gap. Remain. Since the air layer in this gap has poor heat conduction, the heat release of the field coil is hindered and the temperature rises, which promotes insulation deterioration of the coil. In this state, when the reversible operation is repeated for a long period of time or the impact is received from the load side for a long period of time, since the insulating plate 7 is a rigid body, it is not possible to absorb these impacts, and the magnetic pole core 1a and the field are partially absorbed. The magnetic coil 2 strikes or even a plurality of insulating plates 7 are beaten, resulting in mechanical damage and deterioration of insulation. Further, if this state is continued, the gap between the field coil 2 and the magnetic pole iron core 1a is enlarged, and the field coil 2
Will move according to the operating condition, and eventually the field coil 2 will be greatly deformed and the turn insulating material 4 will slip out to cause a rare short between turns, or the copper strip 3 of the field coil 2 will be damaged by metal fatigue. There was a possibility of cutting and leading to an accident.

Therefore, the present invention has a structure in which the heat dissipation of the field coil 2 is improved, the reversible operation is repeated for a long time, and the coil does not move due to the generation of a gap even when the shock is received from the load side for a long time. An object is to provide a salient pole field pole of a rotating electric machine.

[0005]

In order to achieve the above-mentioned object, the present invention provides a salient pole field constituted by a magnetic pole core of a rotary electric machine and a field coil arranged around the magnetic pole core,
After inserting an insulating plate into the gap between the magnetic pole core and the field coil, liquid rubber excellent in high thermal conductivity and impact resistance was filled to integrally mold the field coil and the magnetic pole core. It is a thing.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1, FIG. 2 and FIG. 3 show a configuration example of salient pole field of a rotary electric machine that is an embodiment of the present invention. 1 and 2, the magnetic pole 1 is a magnetic pole core 1.
a and the field coil 2 are supported by the centrifugal force.
Of the magnetic pole iron core end portion 1b that suppresses the radial movement of the magnetic pole core 1a, and the field coil 2 is formed by winding a copper strip 3 around the magnetic pole iron core 1a. Is provided with a turn insulation 4 (eg DuPont Nomex). An insulating collar 5 is arranged between the field coil 2 and the magnetic pole core end 1b, and an insulating sheet for ground insulation is inserted in the gap between the field coil 2 and the magnetic pole core 1a. There is. Since the gap between the field coil 2 and the magnetic pole core 1a is larger than the thickness of the insulating sheet 6 due to manufacturing problems, the insulating plate 7 typified by an epoxy glass laminated plate is provided in this gap. Are stacked and firmly inserted. Further, as shown in FIG. 2, the non-contact portion between the field coil 2 and the insulating plate 7, the insulating sheet 6 and the insulating plate 7, and the insulating plate 7 are completely connected between the magnetic pole core 1a and the field coil 2. Liquid rubber (for example, TSE3331 manufactured by Toshiba Silicone) is filled in the gap and is cured by heating to integrally form the magnetic pole core 1a and the field coil 2. With such a configuration, it is possible to eliminate a gap generated between the magnetic pole core 1a and the field coil 2.

As described above, according to the present invention, a plurality of insulating plates are firmly inserted in the gap between the magnetic pole core and the field coil, and the entire gap between the insulating plate, the field coil and the magnetic pole core has high thermal conductivity. And the impact resistant liquid rubber is filled, and the liquid rubber is heated and hardened to integrate the magnetic pole core and the field coil, so that no heat is generated in the coil and no increase in the temperature of the coil is reduced. You can Also, even if the reversible operation is repeated for a long period of time or the impact is received from the load side for a long period of time, the impact is absorbed by the rubber layer filled in the gap, so there is no mechanical damage to the insulating plate and it is harmful. No coil movement occurs.

[0008]

As described above, according to the present invention, the field coil of the salient pole type rotor and the magnetic pole iron core are integrally formed by the filler, so that the heat dissipation of the field coil is promoted and the temperature of the coil is increased. The rise can be reduced. Further, it is possible to provide a salient pole field of a rotating electric machine in which no reversible operation is repeated for a long period of time or a gap is not generated even if an impact is received from a load side for a long period of time and harmful coil movement does not occur.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a salient pole field of a rotary electric machine according to the present invention.

2 is a detailed enlarged view of a portion B of the supporting and fixing device of FIG.

FIG. 3 is a cross-sectional view taken along the line AA of the support fixing device of FIG.

FIG. 4 is a configuration diagram showing a salient pole field of a conventional rotary electric machine of a salient pole rotor.

5 is a cross-sectional view taken along the line AA of the support fixing device of FIG.

[Explanation of symbols]

1 ... Magnetic pole core 1a ... Magnetic pole core 1b ... Magnetic pole core end 2 ... Field coil 3 ... Copper band 4 ... Turn insulating material 5 ... Insulation collar 6 ... Insulation sheet 7 ... Insulation plate 8 ... Liquid rubber

Claims (2)

[Claims] 1. In a salient pole field of a rotating electric machine comprising a magnetic pole core and a field coil arranged around the magnetic pole core, an insulating plate is provided in a gap between the magnetic pole core and the field coil. A salient pole field of a rotary electric machine, characterized in that a filling material for integrally molding the magnetic pole core and the field coil is filled in the gap. 2. The salient pole field of the rotary electric machine according to claim 1, wherein the filling material is liquid rubber.