JPS603647Y2 - Magnetic pole core of convex pole rotating electric machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a magnetic pole core of a convex pole rotating electrical machine such as a synchronous generator.

For manufacturing convenience, this type of magnetic pole core is made by stacking punched steel plates, applying end plates to both ends, and tightening them with fastening members (rivets or bolts/nuts). A field coil is fitted and fixed to the outer periphery of the rotor yoke with a dovetail.

A schematic perspective view of such a magnetic pole core is shown in FIG. 1, and a front view and a cutaway side view are shown in FIGS. 2A and 2B.

In the figure, 1 is the main part of the magnetic pole core, and 1.6~
It is made by punching and laminating 3.2 mm thick steel plates.

In order to hold down the thin punched steel plates 1 so that they do not open at both ends when tightened in the stacking direction, end plates 2 are placed on both end surfaces and tightened with rivets (or bolts, nuts, etc.) 3.

The part indicated by broken line 4 is a field coil, which is fitted into the body of the magnetic pole core through an insulator.

Reference numerals 11 and 21 denote dovetail convex portions on the stacked punched steel plates 1 and end plates 2, which are inserted into dovetail concave portions provided on the outer periphery of a rotor yoke (not shown) and fixed for rotation.

Further, a coil holder stand 22 is provided on the upper part of the end plate 2, and the coil holder stand 22 is for supporting the field coil 4 so that it does not fly out due to the centrifugal force generated as the rotor rotates. It is manufactured integrally with the end plate 2.

According to the conventional structure of the magnetic pole core described above, it is necessary to specially manufacture a part called an end plate, which is undesirable because it increases the number of parts and the manufacturing process.

The present invention eliminates the above-mentioned drawbacks, and even if the end plate is omitted, it is still possible to perform the function of the end plate, that is, to tighten it so that it does not open at both ends when stacking stamped steel plates, and to use the centrifugal force accompanying rotation to generate a field. To provide a magnetic pole core having a structure that sufficiently supports the coil so that it does not fly out.

According to the present invention, in order to achieve the above object, a fastening member penetrates the steel plates constituting the magnetic pole core in the laminating direction, and the sides of the fastening member near the outer periphery of the magnetic pole core protrude from the end surfaces of the steel plates. The coil receiver is provided with a stand and has a structure in which the fastening member is welded to the end surface of the steel plate.

Embodiments of the present invention will be described below based on the drawings.

FIGS. 3A and 3B show a plan view and a fractured side sectional view of a magnetic pole core according to an embodiment of the present invention, and are examples in which square timber is used as the fastening member.

In the figure, the punched steel plate IA has a through hole punched in the center into which a fastening member is inserted, and this punched steel plate IA
are laminated and pressed together, and after inserting, for example, a square steel 5 as a fastening member into the through hole, both ends are welded to both end surfaces of the punched steel plate IA to form a magnetic pole core.

Coil receiver stands 52 are provided on both end faces of this square steel 5, with the side closer to the outer periphery of the magnetic pole core protruding.

Also, among the welding points, the position corresponding to the pole core body (
It is desirable that the end face of the punched steel plate IA, the end face of the square steel 5, and the welded portion X are finished flush at the coil receiver (at the position below the stand 52, where the field coil is to be inserted).

FIGS. 4A and 4B show a plan view and a fragmented side sectional view of a magnetic pole core according to another embodiment of the present invention, in which a plurality of round members are used as fastening members.

A through hole into which a fastening member is inserted is also punched out in the punched steel plate IB shown in the figure, and the punched steel plates 1B are stacked and pressure-welded, and round steel plates 6, 7, for example, are inserted into the through hole as the fastening member.
After inserting it, both ends are welded to both end faces of the punched steel plate 1B to form a magnetic pole core.

On both end faces of the round steel 6 located in the upper part of this fastening member, the side close to the outer periphery of the magnetic pole core is made to protrude, and the coil receiver is mounted on a stand 62.
has been established.

In addition, among the welding points, at the position corresponding to the body of the magnetic pole core (the coil receiver is below the stand 62 and the position where the field coil is to be inserted), the end face of the punched steel plate IB, the end face of round steel 6 and 7, welding It is desirable that the portions y and y' be finished flush.

5A and 5B are a plan view and a fragmented side sectional view of a magnetic pole core according to another embodiment of the present invention.

This example shows a case where a round material and a rectangular material are used together for the fastening member.

A through hole into which a fastening member (round material) is inserted is also punched out in the punched steel plate 1C shown in the figure, and the punched steel plates IC are stacked and pressed together, and a round steel 6, for example, is inserted into the through hole as a fastening member. After that, both ends are welded to both end faces of the punched steel plate IC, and using, for example, rectangular steel 8 as another fastening member, the both ends are welded to both end faces of the punched steel plate IC. to form a magnetic pole core.

Both end surfaces of the round steel 6 and the flat steel 8 are provided with bases 62 and 82 for the coil receiver by protruding the side near the outer periphery of the magnetic pole core.

In addition, among the welding points, at the position corresponding to the body of the magnetic pole core (the coil receiver is below the base 62.82 and the position where the field coil is to be inserted), the end face of the punched steel plate IC, the end face of the round steel 6, the flat It is desirable that the end faces of the square steel 8 and the welded parts y' and z be finished flush.

According to the structure described above, both ends of the fastening member that penetrates the magnetic pole core in the lamination direction are welded to both end faces of the punched steel plate to perform laminated fastening, and coil holders are provided at both ends of the fastening member. , the end plate can be omitted, and the functions of sufficiently tightening the magnetic pole core and holding the magnetic pole coil can be maintained.

[Brief explanation of drawings]

Figure 1 is a perspective view of a magnetic pole core with a conventional structure, Figure 2 A, B
3A and 3B are a front view and a broken side sectional view of the magnetic pole core of one embodiment of the present invention, and FIGS. 4A and B are another embodiment of the present invention. FIGS. 5A and 5B are a front view and a broken side sectional view of a magnetic pole core according to another embodiment of the present invention. 1, IA, IB, IC...Punched steel plate, 3゜5
,6. 7.8... Fastening member (3...
Rivets or bolts/nuts, 5... Square steel,
6, 7...Round steel, 8...Flat steel), 2
2, 52, 62, 82...The coil holder is a stand.

Claims (1)

[Scope of utility model registration request] In a magnetic pole core of a convex pole type rotating electric machine formed by laminating steel plates, a fastening member is passed through the steel plates constituting the magnetic pole core in the lamination direction, and the sides near the outer periphery of the magnetic pole core at both ends of the fastening member are attached to the steel plate. 1. A magnetic pole core for a convex pole type rotating electric machine, characterized in that the coil receiver has a stand protruding from the end surface, and the fastening member is welded to the end surface of the steel plate.