JPH1066289A - Stator for electric rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stator which prevents a spacer from being worn away owing to the vibration during the operation of an electric rotating machine by a method wherein the spacer which is interposed between a coil inserted into a slot at a stator core and the bottom of the slot is impregnated with an insulating resin between insulating base materials. SOLUTION: A spacer 6 is inserted into the bottom of a slot 2 at a stator core 1, coils 4 are inserted into its upper part, and the coils 4 are fixed by a slot wedge 5. At this time, the spacer 6 is impregnated with an insulating resin between insulating base materials, a material which is expanded to a thickness direction by a heating operation is used, the spacer 6 is expanded by heat at a time when the insulating resin with which the coils 4 are impregnated is dried and hardened, and uneven parts on the bottom face of the slot 2 are buried. Thereby, the spacer 6 comes into contact with the whole face on the bottom face of the slot 2 so as to prevent the spacer 6 from being worn away owing to the vibration during the rotation of an electric rotating machine, and it is possible to omit a working operation in which the bottom face of the slot 2 is made smooth before the spacer 6 and the coins 4 are inserted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a rotating electric machine, and more particularly to a spacer material inserted into a slot of a stator.

[0002]

2. Description of the Related Art When a coil is inserted into a slot formed in the axial direction on the inner periphery of a stator core of a rotating electric machine, the coil comes into direct contact with the bottom of the slot, and the coil is worn out by vibration during operation of the rotating electric machine. To prevent damage,
Insert a spacer such as an insulating laminate between the coil and the bottom of the slot.

FIG. 5 is a diagram showing a state in which a coil is inserted into a slot formed in the axial direction on the inner periphery of the stator core of the rotating electric machine, and is a diagram showing a cross section of one slot of the stator core. A spacer 3 is provided at the bottom of the slot 2 provided in the stator core 1.
Is inserted, and the coil 4 is inserted thereon. Finally, the coil is fixed by the slot wedge 5. Here, there are a case where two coils are inserted and a case where one coil is inserted, and the figure shows an example where two coils are inserted.

Further, when a coil is inserted into a slot formed in the inner periphery of the stator core of the rotating electric machine in the axial direction, the coil comes into direct contact with the side surface of the slot, and the coil is worn due to vibration during operation of the rotating electric machine. In order to prevent damage, insert a spacer such as an insulating laminate between the coil and the side surface of the slot. FIG. 6 is a diagram showing a state in which a coil is inserted into a slot formed in the inner periphery of the stator core of the rotating electric machine in the axial direction, and is a diagram showing a cross section of one slot of the stator core.

A spacer 3a is inserted into a side surface of a slot 2 provided in a stator core 1, and a coil 4 is inserted inside the spacer 3a.
Finally, the coil is fixed by the slot wedge 5. Here, there are a case where two coils are inserted and a case where one coil is inserted, and the figure shows an example where two coils are inserted.

[0006]

In the conventional rotating electric machine stator configured as described above, if the bottom surface of the slot has irregularities, the spacer 3 between the coil and the bottom surface of the slot is vibrated during operation of the rotating electric machine. The coil 4 may become loose in the slot due to wear and the sinking of the spacer 3 toward the bottom of the slot. In order to prevent this, it is necessary to smoothly process the irregularities on the bottom surface of the slot before inserting the spacer and the coil, and this processing requires a long time.

Accordingly, the present invention has been made to solve such a conventional problem, and eliminates the necessity of smoothing the unevenness on the bottom surface of the slot and fixing the rotating electric machine without having to spend a large amount of time on this work. The purpose is to provide children.

In the conventional rotating electric machine stator configured as described above, if there are irregularities on the side surface of the slot,
Since the spacer 3a between the coil and the side surface of the slot is worn by the vibration during the operation of the rotating electric machine and the spacer 3a moves in the side surface of the slot, the coil 4 may be loosened in the slot. In order to prevent this, it is necessary to smoothly process the unevenness on the side surface of the slot before inserting the spacer and the coil, and this processing requires a long time.

Therefore, the present invention has been made to solve such a conventional problem, and eliminates the necessity of smoothing the unevenness on the side surface of the slot and fixing the rotating electric machine without having to spend a large amount of time in this work. The purpose is to provide children.

[0010]

In order to achieve the above object, the present invention provides a spacer inserted between a coil inserted into a slot formed in the inner periphery of the stator in the axial direction and a bottom of the slot. Alternatively, as a spacer inserted between the coil and the side surface of the slot, a material in which an insulating resin is impregnated between insulating base materials and expands in the thickness direction by heating is used.

In the stator for a rotating electric machine according to the present invention, an insulating base material used as a spacer inserted between a coil inserted into a slot formed in an axial direction on the inner periphery of the stator and a slot bottom. A material (for example, ISOVOLTA) which is impregnated with an insulating resin and expands in the thickness direction by heating
(IZOVOLTA) “POROMAT2242”, 80
(Expansion at about 150 ° C.), but expands due to heat (about 150 ° C.) when the insulating resin impregnated in the coil is dried and hardened, thereby filling the irregularities on the bottom surface of the slot. For this reason, the contact between the slot bottom spacer and the slot bottom surface becomes the entire surface contact from the beginning of the production of the rotating electric machine, and the spacer does not wear due to vibration during operation of the rotating electric machine. Therefore, it is not necessary to smoothly process the unevenness on the bottom surface of the slot before inserting the spacer and the coil, and it is not necessary to spend a large amount of time in this processing operation.

Further, in the stator of the rotating electric machine according to the present invention, the insulation used as a spacer inserted between a coil inserted into a slot formed in the inner periphery of the stator in an axial direction and a side surface of the slot. A material that is impregnated with insulating resin between the base materials and expands in the thickness direction by heating expands by heat generated when the insulating resin impregnated in the coil is cured, and fills the unevenness on the side surface of the slot. For this reason, the contact between the slot side surface spacer and the slot side surface becomes the entire surface contact from the beginning of the manufacturing of the rotating electric machine, and the spacer does not wear due to vibration during operation of the rotating electric machine. Therefore, it is not necessary to smoothly process the unevenness on the side surface of the slot before inserting the spacer and the coil, and it is not necessary to spend a large amount of time in this processing operation.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a state in which a coil is inserted into a slot formed in the inner periphery of a stator core of a rotating electric machine in an axial direction, and a slot 2 provided in a stator core 1 is shown.
The spacer 6 is inserted into the bottom of the coil, the coil 4 is inserted thereon, and finally the coil is fixed by the slot wedge 5. Here, the spacer 6 is impregnated with insulating resin between the insulating base materials,
Materials that expand in the thickness direction by heating (for example, ISOV
"POROMAT224" manufactured by OLTA (Izovolta)
2), expansion at about 80 ° C). Since the spacer 6 is compressed in the thickness direction in advance,
Upon expansion, it expands only in the thickness direction. FIG. 1 shows a state before the spacer 6 is expanded by heat. The spacer 6 expands due to heat (about 150 ° C.) when the insulating resin impregnated in the coil is dried and hardened, and fills in the irregularities on the bottom surface of the slot. FIG. 2 shows a state after the spacer 6 has been expanded by heat. In this state, the spacer 6 fills the gap with the bottom surface of the slot, and the entire surface is in contact, so that wear of the spacer due to vibration during operation of the rotating electric machine can be prevented. Therefore, it is not necessary to smoothly process the unevenness on the bottom surface of the slot before inserting the spacer and the coil, and it is not necessary to spend a large amount of time in this processing operation.

FIG. 3 is a view showing a state in which a coil is inserted into a slot formed in the axial direction on the inner circumference of the stator core of the rotating electric machine. A spacer 6a is provided on the side face of the slot 2 provided in the stator core 1. And the coil 4 inside,
Finally, the coil is fixed by the slot wedge 5. Here, the spacer 6a is impregnated with insulating resin between insulating base materials,
A material that expands in the thickness direction by heating is used. FIG. 3 shows a state before the spacer 6a is expanded by heat. The spacer 6a expands due to the heat generated when the insulating resin impregnated in the coil is cured, and fills the irregularities on the side surface of the slot. FIG. 4 shows a state after the spacer 6a is expanded by heat.

In this state, the spacer 6a fills the gap with the side surface of the slot and comes into contact with the entire surface, so that wear of the spacer due to vibration during operation of the rotating electric machine can be prevented. Therefore, it is not necessary to smoothly process the unevenness on the side surface of the slot before inserting the spacer and the coil, and it is not necessary to spend a large amount of time in this processing operation.

The present invention can be practiced not only when a rotating electric machine is newly manufactured but also when a used stator coil is removed and replaced with a new coil. That is, the surface of the slot bottom or the side surface of the slot after the used stator coil is removed usually becomes rough due to damage or the like when the used stator coil is removed. Therefore, when replacing the coil with a new coil, it is necessary to smooth the unevenness of the slot bottom surface and the slot side surface again. Therefore, by using the above-mentioned material in this case, it is not necessary to smoothly process irregularities on the bottom surface of the slot or the side surface of the slot before inserting the spacer and a new coil.

[0017]

As described above, according to the present invention, the insulating resin is impregnated with the insulating material between the insulating base plates from the insulating laminated plate or the like, and the heating is performed. By changing to a material that expands in the thickness direction, the spacer expands due to heat generated when the insulating resin impregnated in the coil is cured, and fills the irregularities on the bottom surface of the slot. For this reason, the contact between the slot bottom spacer and the slot bottom surface becomes the entire surface contact from the beginning of the production of the rotating electric machine, and the spacer does not wear due to vibration during operation of the rotating electric machine. Therefore, it is not necessary to smoothly process unevenness on the bottom surface of the slot before inserting the spacer and the coil.
It is possible to provide a stator of a rotating electric machine that does not need to spend much time for this processing operation.

Further, according to the present invention, the insulating resin is impregnated between the insulating base material and the insulating material from the insulating laminated plate or the like and inserted into the thickness direction by heating. By changing the material used, the spacer expands due to heat generated when the insulating resin impregnated in the coil is cured, and fills the unevenness on the side surface of the slot. For this reason, the contact between the spacer side surface spacer and the slot side surface becomes the entire surface contact from the beginning of the manufacturing of the rotating electric machine, and the spacer does not wear due to vibration during operation of the rotating electric machine.
Therefore, it is not necessary to smoothly process unevenness on the side surface of the slot before inserting the spacer and the coil, and it is possible to provide a rotating electric machine stator that does not need to spend a large amount of time in this processing operation.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a stator of a rotating electric machine according to the present invention, before a spacer inserted into a slot bottom of the stator expands in a thickness direction by heating.

FIG. 2 is a view showing one embodiment of the stator of the rotating electric machine according to the present invention, after the spacer inserted into the slot bottom of the stator expands in the thickness direction by heating.

FIG. 3 is a view showing one embodiment of a stator of the rotating electric machine according to the present invention, before a spacer inserted into a slot side surface of the stator expands in a thickness direction by heating.

FIG. 4 is a view showing one embodiment of the stator of the rotating electric machine according to the present invention, after the spacer inserted into the slot side surface of the stator expands in the thickness direction by heating.

FIG. 5 is a diagram illustrating an example of a stator of a conventional rotating electric machine, illustrating a cross section of one stator slot of the rotating electric machine, and a diagram in which a spacer is inserted into a slot bottom.

FIG. 6 is a diagram illustrating an example of a stator of a conventional rotating electric machine, illustrating a cross section of one stator slot of the rotating electric machine, and a diagram in which a spacer is inserted into a side surface of the slot.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stator core, 2 ... Stator slot, 2 ... Slot bottom spacer, 3a ... Slot side spacer, 4 ... Stator coil, 5 ... Slot wedge, 6 ... Slot bottom spacer, 6a
... Slot side spacer.

Claims (3)

[Claims] 1. A stator for a rotating electrical machine in which a coil is inserted into a slot formed in an axial direction on an inner periphery of a stator, and the coil is fixed by a slot wedge. And a spacer impregnated with an insulating resin interposed in an insulating base made of a material that expands in the thickness direction by heating. 2. A stator of a rotating electrical machine in which a coil is inserted into a slot formed in an axial direction on an inner periphery of a stator and the coil is fixed by a slot wedge. And a spacer impregnated with an insulating resin interposed in an insulating base made of a material that expands in the thickness direction by heating. 3. The rotating electric machine according to claim 1, wherein a temperature at which the insulating base material expands is lower than a heating temperature at the time of drying and curing of the insulating resin impregnated in the coil. stator.