JPS6162331A - Rotary electric machine - Google Patents

Abstract

PURPOSE:To uniformize core temperature by constructing the core block in the central portion of a core with silicon steel plates and constructing the core blocks at both end portions of the core with amorphous metal plates. CONSTITUTION:A portion of the cooling air passes from the inner periphery of a core 4 through an air duct 2 to cool the core 4 and a winding 3 within a slot, and it flows out from the back of the core 4. The remaining cooling air passes around the end portion of the winding 3 to cool this winding end portion and flows out to the outer periphery side. The core blocks 4a and 4b at both end portions of the core 4 are formed by laminating amorphous metal plates having less iron loss, and a central core block 4c is formed by laminating silicon steel plates. With this, temperature increase in the core blocks at both core end portions lowers, and the core temperature can therefore be uniformized.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a rotating electric machine, and the patented iron core structure ζ.

[Conventional technology]

FIG. 1 is a longitudinal sectional view of a conventional rotating electric machine disclosed in, for example, Japanese Utility Model Application Publication No. 57-89840.
) is an iron core, and silicon steel plates are laminated to form a plurality of iron core blocks (1a). (2) is the ventilation duct formed between the iron core blocks (1a), (3) is the iron core (
1) slot (not shown)! This is a winding wire attached to the iron core (1), with both ends protruding outside the iron core (1).

Next, the operation will be explained. A part of the cooling air flows through the iron core (1)
The core (1) and the windings (3) in the slots are cooled through the ventilation duct (2) from the inner circumference of the core (1), and then flowed out from the back of the core (1). The other cooling air passes around the end of the winding (3), cools the end of the winding, and flows out to the outer circumferential side.

Since the conventional rotating electric machine is constructed as described above, the temperature of the iron core (1) due to heat conduction from the winding (3) is the same as that of the iron core (1) at both ends of the iron core block (1a), as shown in Figure 2. There is a drawback that the temperature in the central part of the core block (1a) is high, and the temperature in the central part of the core block (1a) is low, making the core temperature non-uniform in the longitudinal direction of the core.

[Summary of the invention]

This invention was made in view of the drawbacks of the conventional products as described above, and it is improved by constructing the central core block of the core with a silicon steel plate and constructing the core blocks at both ends of the core with amorphous metal plates. , which provides rotation [1'1] that can equalize the core temperature.

[Embodiments of the invention]

Below, one embodiment of the present invention will be explained based on FIG. 8. In FIG. 0, (2) is a ventilation duct, (3) is a winding,
4) is an iron core, (4a) and (4b) are iron core blocks formed by laminating amorphous metal plates with low iron loss, and (4c) is a core block formed by laminating silicon steel plates. This is the central core block of the core (4), and these core blocks (4a), (4b), and (4c) constitute the core (4). In addition, each core block (4a)
, (4b).

(4C) is composed of a plurality of iron core blocks.

Next, the operation will be explained. The central core block (4C) of the core (4) is made of a silicon steel plate as in the past. On the other hand, both end core blocks (4a) of the core (4)
, (4b) are made of an amorphous metal plate with low core loss, so the temperature rise is significantly reduced.

Therefore, as shown in FIG. 4, the temperature of the iron core (4) can be reduced by suppressing the temperature rise of the core blocks (4a) and (4b) at both ends of the iron core (4). can be made uniform.

Note that the amorphous metal plate in the above embodiment was Fe-
It is composed of 8i-B alloy, Fe-8i-B-C alloy, etc.

Further, in the above embodiment, the iron core (4) is applied to a stator iron core and a rotor iron core.

〔Effect of the invention〕

As explained above, in this invention, the central core block of the core is made of a silicon steel plate, and the core blocks at both ends of the core are made of amorphous metal plates, thereby making it possible to equalize the temperature of the core.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a conventional rotating electric machine, FIG. 2 is an explanatory diagram showing a conventional iron core temperature, FIG. 8 is a longitudinal cross-sectional view showing a rotating electric machine according to an embodiment of the present invention, and FIG. It is an explanatory view showing iron core temperature concerning this invention. In the figure, (4) is the core, (4a) and (4b) are both end core blocks, and (4c) is the center core block. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In a rotating electric machine having an iron core in which a plurality of iron core blocks are formed by laminating thin metal plates, the core blocks at both ends of the iron core are formed of amorphous metal plates, and the central iron core block of the iron core is formed of a silicon steel plate. A rotating electrical machine characterized by comprising: (2) The rotating electric machine according to claim 1, wherein both ends and the central portion of the iron core block are each comprised of a plurality of iron core blocks.