JPS5917834A - Magnetic core of salient-pole rotary electric machine and manufacture of the same - Google Patents

Abstract

PURPOSE:To attain a magnetic core for salient-pole type rotary electric machine easy in manufacture and high in accuracy by a method wherein a narrow-width core formed of laminated iron plates having a narrow width is provided in plural number at the intermediate part, spaces on both sides of the narrow-width core serve as vent paths, and the iron plates constituting the magnetic core is fastened by a fastening collar commonly used as a short-circuiting collar. CONSTITUTION:A magnetic core is provided at plural locations of the intermediate part of laminated punched iron plates 7 in the form of T having a dove-tail part 1a at the lower end thereof with narrow-width cores each formed of laminated iron plates 7 having a narrower width than that of the T-shaped iron plates 1. Spaces on both sides of the narrow-width core serve as vent paths 6 and are aligned with vent ducts of the rotor rim. The iron plats 1, 7 constituting the magnetic core are fastened by a frame- like fastening collar 5 commonly used as a short-circuiting collar, and a reinforcing stay 11 is mounted to the upper surface of the fastening collar, the stay 11 being brought into abutment with the side face of the magnetic core. Further, the iron plates 1, 7 are formed with a hole 9 at an end core part 12 and a hole 9a at a remaining core part 13, and a rivet 8 is inserted through those holes to fasten the iron plates.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic pole core for a salient pole rotating electrical machine formed by laminating iron plates, and a method for manufacturing the same.

[Technical background of the invention and its problems]

As shown in Figures 1 and 2, the magnetic pole core of a conventional salient pole type rotating electric machine, which is formed by laminating iron plates, is a punched iron plate (1).
Laminated with a pole tip plate (
2), and tighten fastening members such as tightening ports or rivets (
3) is integrated.

In this structure, the pole tip plate (2) is a laminated iron plate (1
), fastening members such as tightening bolts or rivets (3)
, rounding the inner diameter of the magnetic pole coil (4) to match the bending radius, supporting the centrifugal force of the magnetic pole coil (4) extending in the axial direction, and forming part of the magnetic circuit. . As can be seen in Figures 1 and 2, this pole tip plate (2) has a complex structure and requires time to machine, and the magnetic circuit cross-sectional area is reduced due to the rounding of the pole tip plate (2). Since the surface of the magnetic pole plate (2) is in the form of a lumpy core, there are problems such as loss due to harmonics.

Therefore, in order to eliminate this pole tip plate, as shown in FIGS. 3 and 4, an iron plate (1
) is penetrated by a fastening member (3) in the stacking direction, and the side near the outer periphery of the magnetic pole core at both ends of this fastening member (3) protrudes from the end surface of the iron plate (1), and the coil receiver is provided with a stand θ force, and A proposal for a structure in which the fastening member (3) is welded to the end surface of the iron plate has been disclosed.

However, with this structure, it is difficult to tighten the laminated iron plate (1) because the coil receiver has a protruding part called the base (C).
Even if somehow it is tightened, a technique for welding the fastening member to the end face of the iron plate (1) in the tightened state [Object of the Invention] The present invention is directed to a salient pole rotating electric machine that is easy to manufacture while eliminating the need for a pole end plate. The purpose of the present invention is to provide a magnetic pole core and a method for manufacturing the same.

[Summary of the invention]

In the present invention, the magnetic pole core has a narrow core made of narrow laminated iron plates in the middle part, the sides of the narrow core are used as ventilation passages, and the iron plate constituting the magnetic pole core is used as a tightening collar that also serves as a short-circuit collar. It shall be deemed that the agreement has been concluded. The manufacturing method includes inserting the iron plate constituting the magnetic pole into a tightening collar that also serves as a short-circuit collar, and inserting two iron plates at both ends of the intermediate part of the core.
A pair of taper keys are driven in to create a gap, a narrow +1] iron core is inserted into this gap, and the taper keys are then removed. The object of the present invention is to provide a magnetic pole core that is easy to manufacture and has the added benefit of improving the cooling of the magnetic pole by utilizing the present invention, and a method for manufacturing the same.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 5 to 8.

In this embodiment, the magnetic pole core is made by stacking punched iron plates (1) having a dovetail portion (1a) at the lower end of the T-shape, and stacking the laminated iron plates (1) narrower in width than the T-shaped iron plates (1) at multiple locations in the middle. Iron plate (equipped with a narrow rjy iron core by force, the side surface of the narrow iron core is made to match the ventilation duct of the rotor rim (not shown) as a ventilation passage (6). It is fastened with a frame-shaped tightening collar (5) that also serves as a short circuit collar, and a reinforcing stay (1, 1) that comes into contact with the side surface of the magnetic pole core is attached to the top surface of the tightening collar (5).Furthermore, the magnetic pole core is configured. Each iron plate (1).

(7) is the end core part (12 is the head of the rivet (8))
8, I), and make a hole (9) into which the remaining iron core part (
13) is provided with a hole (9a) through which a rivet passes and is fastened with a rivet (8). The bottom of the dovetail (1a) of the iron plate (]) of the bottom plate forming the end core portion 02 is welded together at the welding part (10).

This method of manufacturing a magnetic pole core is based on the above-mentioned T-shaped iron plate (
1) into the collar (5), and insert two narrow iron plates in the middle of the iron core (as shown in Figure 8) on both sides of the position where the narrow iron plate should be inserted. Drive in a pair of tapered keys to create a gap, and insert the narrow iron core into this gap.Then, fasten with rivets (8).
The bottom of the dovetail (1a) of the end core (12) is welded together at the welding part 00), and then the taper key 04 is removed.

The above-mentioned magnetic pole core, the operation of which will be explained next, uses a short-shaped magnetic pole coil (4), which makes it possible to omit the block-shaped magnetic pole tip plate at the head ridge, which is complicated to process, and is inexpensive. , the magnetic properties are good, and the surface area of the magnetic pole head can be significantly reduced. Since a ventilation passage (6) is formed in the magnetic pole iron core, the magnetic pole can be cooled well and the size can be reduced. Also, since the tightening collar (5) is provided with a stay (11), the magnetic pole coil (4)
It does not bend outward due to centrifugal force. However, in the manufacturing method, a short circuit collar, which is a necessary part for the magnetic pole of a rotating electric machine, is used as a tightening collar (5), so it is not only inexpensive, but also allows you to drive a taper key 04) to tighten the iron plate. This is advantageous, and there is no difficulty in tightening and welding the iron plates because there is a protrusion at the end of the magnetic pole core, unlike the conventional example.

Therefore, the workability is good, and from this point of view, the manufacturing cost is also reduced.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, but may include the following without changing the gist thereof:
Of course, it can be implemented with various modifications.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a magnetic pole core of a salient pole rotating electric machine that is easy to manufacture, has good productivity, good efficiency, can be downsized, and is inexpensive, and a method for manufacturing the same.

[Brief explanation of the drawing]

Figures 1 and 3 are elevational views showing the magnetic pole cores of different conventional salient pole rotating machines, Figure 2 is a partially cutaway side view of Figure 1, and Figure 4 is the same as Figure 3. FIG. 5 is an elevational view showing one embodiment of the magnetic pole core of the salient pole rotating electric machine of the present invention, FIG. 6 is a partially cutaway side view of FIG. 5, and FIG. Figure 5 is an elevation view showing the narrow iron plate, Figure 8 is the same as Figure 6 ■-
It is a cross-sectional view showing a state in which a taper key is driven in during manufacturing, as viewed from the arrow along the city line. 1... Iron plate 5... Tightening collar 6
...Ventilation passage 7...Narrow iron plate 8.
...Rivet 8a...Rivet head 9.
9a...hole 10...welded part 12.
...End core part 13...Remaining core part 14.
... Taper Key Agent Patent Attorney Inoue - Rikitsutsu 1 Figure 3 Figure 2 Figure 4

Claims (4)

[Claims] (1) In a magnetic pole core of a salient pole type rotating electrical machine formed by laminating iron plates, the magnetic pole core has a narrow core made of narrow laminated iron plates in the middle part, and the sides of the narrow core are used as ventilation channels. A magnetic pole core for a salient pole rotating electric machine, characterized in that the iron plates constituting the magnetic pole core are fastened with a tightening collar that also serves as a short-circuiting collar. (2) A magnetic pole core for a salient pole rotating electric machine according to claim 1, wherein a reinforcing stay that abuts a side surface of the magnetic pole core is attached to the upper surface of the tightening collar. (3) In the iron plate constituting the magnetic pole core, a hole is provided in the end core portion into which the rivet head can be sunk, and a hole is provided in the remaining core portion to allow the rivet to pass through, and fastened with rivets. A magnetic pole core for a salient pole rotating electric machine according to claim 1 or 2, wherein the iron plates are joined together by welding. (4) In a method for manufacturing a magnetic pole core of a salient pole type rotating electric machine formed by stacking and layering iron plates, the iron plate constituting the magnetic pole is inserted into a tightening collar that also serves as a short-circuit collar. A salient pole characterized in that a pair of taper keys are driven into each end of each side to create a gap, a narrow core made of a narrow laminated iron plate is inserted into the gap, and then the taper keys are removed. A method for manufacturing magnetic pole cores for rotating electric machines.