JPS6311875Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to improving the magnetic pole core of a rotating electric machine, and even if the magnetic pole core is integrated with the yoke, the core width is kept to the minimum necessary, and the magnetic pole piece remains wide. .

Generally, when manufacturing field magnets for DC machines, etc., by integrally molding the yoke and the magnetic pole core, it not only reduces the manufacturing and assembly man-hours, but also improves the accuracy of the finished product and makes the magnetic flux distribution uniform, which improves performance. It is also known to improve The magnetic pole core that constitutes the magnetic field at this time generally consists of an iron core to which a magnetic pole ring is attached, and a magnetic pole piece that protrudes from the iron core toward the gap side of the rotating electric machine. However, as shown in Fig. 1, the conventional field magnet
Since the and iron core 2 are integrated, the magnetic pole wire ring 3 must be fitted from the magnetic pole piece 4 side.

However, on the other hand, in order to make the magnetic flux distribution uniform, it is not preferable to leave both ends 4a of the magnetic pole piece 4 at an acute angle, and instead they are cut out diagonally.

Therefore, the width b of the magnetic pole core 2 had to be made as wide as the width of the notches at both ends 4a.
In addition, in the figure, 5 is a magnetic pole arc.

For this reason, the amount of wire required for the magnetic pole ring 3 increases, and the wire space 7 formed between the magnetic pole ring 3 and the commutating pole 6 increases.
The disadvantage was that the space was small and the entire device was large.

The present invention was made in view of these conventional drawbacks, and even if the yoke and the pole core are integrated, the width of the core is kept to the minimum necessary, and the pole piece remains wide, and the electric wire required for the pole ring is The purpose of the present invention is to provide a magnetic pole core for a rotating electrical machine that can reduce the amount of the magnetic pole core.

The structure of the present invention that achieves this purpose consists of an iron core, which is the part to which the magnetic pole ring is attached, and a magnetic pole piece, which is the part that protrudes from the iron core to the gear gap side of the rotating electrical machine, and is formed integrally with the yoke. In the magnetic pole core, both ends are notched diagonally and the pole piece is formed wider than the core, and the width between the inner sides is slightly larger than the width of the core, and the width is larger than the thickness of the magnetic pole ring. 1/2 of the difference between and the width of the iron core
It is characterized by having an iron core in which a recessed portion is formed at one end in the width direction with a larger depth, and a laminated iron core that is fitted into the recessed portion.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 2 is a cross-sectional view of one embodiment of the magnetic pole core of the present invention, shown with a magnetic pole ring attached thereto. In the drawings, parts that are the same as those in the prior art are designated by the same numbers.

The magnetic pole core integrated with the yoke 1 has the width B of the core 2.
is the minimum necessary size. A notch is formed in both ends 4a of the magnetic pole piece 4 to make the magnetic flux uniform.The both ends 4a protrude from the iron core 2, and the width _B1 thereof is wider than the width B of the iron core 2. For this reason, the magnetic pole ring 3 cannot be installed straight from the magnetic pole piece 4 side. For this reason, a recess 8 is formed at one end (right end in the figure) in the width direction (horizontal direction in the drawing) of the iron core 2, and the magnetic pole ring 3a or 3b is first inserted into this recess 8, and at this time, the magnetic pole ring 3a or 3b is inserted into the recess 8. The size is such that one end 4a of 4 can be dodged. That is, this recess 8
is a width W between the inner sides that is slightly larger than the width B of the core 2, and a width W that is slightly larger than the thickness t of each of the magnetic pole rings 3a and 3b, and the width B1 of the magnetic pole piece ₄ and the width B of the core 2. The depth d is greater than 1/2 of the difference. In the case of this embodiment, the magnetic pole ring 3 is divided in the axial direction (two-part type) in order to make the width w of the recessed portion 8 as small as possible. Thus, such divided magnetic pole front wheels 3a, 3b can be mounted on the iron core 2. Furthermore, when the magnetic pole rings 3a and 3b are installed as described above, the recess 8 becomes a blank space,
Since the magnetic flux is disturbed, a laminated iron core 9 into which iron plates are laminated and fitted is fitted into the recess 8.

After the integrated field is assembled in this way, the yoke 1, the iron core 2, the magnetic pole ring 3, and the laminated iron core 9 are assembled.
The entire body is molded in resin.

As described above, according to the present invention, even if the magnetic pole core and the yoke are integrated, the width of the core of the magnetic pole iron can be minimized, and the magnetic pole ring can be attached even if the magnetic pole piece remains wide. The amount of electric wire required for the magnetic pole ring is also small. Furthermore, the ring space can also be increased.

Furthermore, the field magnet can be made small and compact, and the entire device can also be made small and compact, making it inexpensive.

In addition, since the yoke and the magnetic pole core are integrated, the number of parts is small, the number of manufacturing and assembly steps is reduced, and the accuracy after assembly is high, resulting in improved performance.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a part of a magnetic pole core of a rotating electric machine according to the prior art, and FIG. 2 is a cross-sectional view showing a part of a magnetic pole core of a rotating electric machine according to the present invention. In the drawings, 1 is a yoke, 2 is a magnetic pole core, 3 is a magnetic pole ring, 4 is a magnetic pole piece, 5 is a magnetic pole arc, 6 is a commutating pole, 7 is a wire ring space, 8 is a recess, 9 is a laminated iron core, B is the pole iron width, and _B1 is the width of the pole piece.

Claims (1)

[Scope of utility model registration request] It consists of an iron core, which is the part on which the magnetic pole ring is attached, and a magnetic pole piece, which is the part that protrudes from the iron core to the gear side of the rotating electric machine. A magnetic pole piece that is chipped and formed wider than the iron core, and a width between the inner sides that is slightly larger than the width of the iron core and larger than the thickness of the magnetic pole ring, and 1/2 the difference between the width of the magnetic pole piece and the width of the iron core. 1. A magnetic pole core for a rotating electric machine, comprising: an iron core having a recessed portion formed at one end in the width direction with a larger depth; and a laminated iron core fitted into the recessed portion.