JPS5854859Y2 - Stator of corrugated steel plate rotating electric machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a stator for a corrugated steel plate rotating electric machine.

An example of a generally-known fully enclosed fan-shaped stator for this type of rotating electric machine will be explained with reference to FIGS. 1 and 2.

In the figure, 1 is a stator core, 2 is a stator coil, and 3 is attached to the outer periphery of the stator core 1, and a plurality of axial outer protrusions 4a and inner protrusions 4b are formed by bending a thin steel plate in a wave shape.
The corrugated steel plate frame has an internal ventilation passage 5 between the inner protrusions 4b and an external ventilation passage 6 between the inner protrusions 4a.
is formed.

7 is a flange, 8 is a blanket, 9 is a rotating shaft, 10 is a rotor core, 11 is an internal fan, 12 is an external fan, 1
3 is an outer fan cover.

The solid arrows in FIG. 1 indicate the flow of outside air, and the dashed arrows indicate the flow of inside air.

As described above, in the conventional rotating electrical machine, the corrugated steel frame 3 is attached to the outer periphery of the stator core 1, so the inner protrusion 4b of the corrugated steel frame 3 is on the same line as the outer periphery of the stator core 1. Therefore, the coil end portion of the stator coil 2 comes close to the inner protrusion portion 4b,
There was a risk that the stator coil would be damaged because the insulation gap could not be maintained, and in order to maintain the insulation gap, the outer shape of the fuselage had to be enlarged, which was disadvantageous economically.

This idea was made with the aim of eliminating the above-mentioned drawbacks, and it is possible to maintain an insulating distance from the coil end of the inner protrusion of the corrugated steel frame that faces the coil end of the stator coil. The present invention provides a stator in which an insulating gap is secured by cutting out a gap and fixing a closing plate to the cutout.

An embodiment of this invention will be described below based on the drawings.

In FIGS. 3 and 4, reference numeral 14 indicates a cutout of the inner protrusion 4b of the corrugated steel plate frame 3 facing the coil end of the stator coil 2 so as to create a gap that maintains an insulation distance from the coil end. 15 and 16 are closing plates that close the cut portion.

It goes without saying that the cutout 14 and the closing plates 15 and 16 are also provided on the opposite side.

Note that the other configurations are the same as those of the prior art, so explanations will be omitted.

As described above, in this invention, the inner protrusion 4b of the corrugated steel frame 3 facing the coil end of the stator coil is cut out to create a gap that maintains an insulating distance from the coil end, and this part is closed. Since the plates 15 and 16 are fixed, the gap between the coil end portion and the coil end portion can be increased, and the problem of the insulation gap can be solved.

In this embodiment, the cutout 14 is formed between the axial end of the stator core 1 and the axial end of the corrugated steel plate frame 3. The flange 7 and the bracket 8 may be extended to the axial end thereof, and in this case, the outer dimensions of the flange 7 and bracket 8 may be increased by the amount removed.

As described above, according to this invention, the inner protrusion of the corrugated steel frame facing the coil end of the stator coil is
The above-mentioned coil end section is cut out to create a gap that maintains the insulation distance, and a closing plate is fixed to this section, so there is a sufficient insulation gap between the coil end and the corrugated steel plate frame, and the body can be made larger. Damage to the stator coil can be prevented without any damage.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional rotating electric machine, and Figure 2 is a vertical cross-sectional view of a conventional rotating electric machine.
Figure 3 is a cross-sectional view taken along the line I-■■, Figure 3 is a vertical cross-sectional view showing the main parts of an embodiment of this invention, and Figure 4 is Figure 3 IV.
It is a sectional view taken along the -IV line. In the figure, 1 is a stator core, 2 is a stator coil, 3 is a corrugated steel plate frame, 4a is an outer protrusion, 4b is an inner protrusion, 5 is an internal ventilation passage, 6 is an external ventilation passage, 7 is a flange, and 8 is a The bracket, 14 is a cutout, and 15 and 16 are closing plates. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A corrugated steel plate frame in which an axial ventilation passage is formed by bending a steel plate in a corrugated manner is attached to the outer periphery of a stator core around which a stator coil is wound. A stator for a corrugated steel plate rotating electric machine, characterized in that an inner protrusion of a corrugated steel plate frame is cut out to form a gap that maintains an insulating distance from the coil end part, and a closing plate is fixed to the cutout part.