JP2504140Y2 - electromagnet - Google Patents

Description

[Detailed description of the device] [Objective of device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnet, and more particularly to an electromagnet having an improved coil fixing structure.

[0002]

2. Description of the Related Art FIG. 4 is a side view of a multi-pole type electromagnet incorporated in a conventional accelerator, and FIGS. 5 and 6 are partial detailed views thereof.

4, FIG. 5, and FIG. 6, the cylindrical iron core 2 having a regular octagonal shape when viewed from the side is as shown in FIG. 5 (b) after stacking silicon steel plates punched out in a substantially mountain shape. End plates 12 are superposed on both ends of the stud 14, and the studs 14 are positioned by the positioning pins 13 that are fitted in the semicircular groove portions at both ends of the mountain shape and are inserted into the magnetic pole core 3 while being pressed by a press. And the back plate 5a of the unit magnet 5 is fastened and welded to the backing plate 15 stacked in the stacking direction to be integrated.

On the other hand, on the outer periphery of the magnetic pole core 3, FIG. 5A showing an enlarged detailed view of one pole of FIGS. 4 and 4 and FIG.
FIG. 5B is a sectional view taken along line BB of FIG. 5A and FIG.
As shown in FIG. 6B showing a CC cross-sectional view of FIG. 6B, a coil 1 in which wire insulation is applied in advance, the wire is wound in a square shape, a mica tape is wound around the outer periphery, and an epoxy resin is vacuum-impregnated. Is played before being assembled into an octagon.

This coil 1 is made of a steel plate L fixed to the side surface 12a of the end plate 12 with a bolt 8 as shown in FIGS. 5 and 6 (a).
The coil-shaped coil support 7 presses the inner surface of each iron core 2, and an insulating spacer 9 made of glass fiber reinforced plastic (GFRP) is inserted between the inner surface of the coil 1 in the longitudinal direction and the side surface of the magnetic pole iron core 3. There is. A gap δL is provided between the coil 1 and the outer surface 6 of the end plate 12 in order to escape the inner bending radius R formed by bending the coil 1.

The unit magnet 5 assembled in this way
The four sets are assembled by associating both ends with each other through the pins 13, and the ear portions 2b welded to the both ends are bolted into a tubular shape.

[0007]

However, in the electromagnet having such a structure, the coil 1 fixed to the cylindrical iron core 2 is fixed by inserting the above-mentioned insulating spacers 9 on both side surfaces in the longitudinal direction. However, since the gap δL is formed on the side facing the end plate 12, there is a possibility that the coil 1 may move due to an external force applied in the longitudinal direction. Further, the coil support 7 may be deformed and displaced by a force applied from the direction of the back surface 5a of the unit magnet 5. Then, not only the lead-out portion (not shown) of the coil 1 is deformed, but also if it is repeated, it may be broken. Therefore, an object of the present invention is to obtain an electromagnet that can firmly fix a coil to a cylindrical iron core and can maintain the connection of the lead-out portion for a long period of time. [Device configuration]

[0008]

DISCLOSURE OF THE INVENTION The present invention relates to an electromagnet in which a plurality of magnetic pole cores are provided so as to project from the inner periphery of a cylindrical core, and a coil bent in a rectangular shape is inserted into the magnetic pole core. By moving an L-shaped coil support between the end face of the magnetic pole in the direction of the center line of the shaped core and the inner circumference of the coil and fixing it to the magnetic pole core, the movement of the coil in the direction of the center line of the cylindrical core can be achieved. This is an electromagnet that prevents the damage, firmly fixes the coil, and maintains the connection of the lead-out portion for a long period of time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the electromagnet of the present invention will be described below with reference to the drawings. However, the same parts as those in FIGS. 4, 5 and 6 are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is a partial side view of an electromagnet according to the present invention, which corresponds to FIG. 5, and FIG.
FIG. 7 is an enlarged perspective view of the coil support 4 of FIG. 6 and is a view corresponding to FIG.

1 and 2, the L-shaped coil support 4 attached to the outer side of the end plate 12 is made of glass fiber reinforced plastic in which glass fiber is impregnated with epoxy resin, and one side of the L-shaped coil is formed. It is inserted between 1 and the end plate 12. An L-shaped insulating protective spacer 7 also made of glass fiber reinforced plastic is previously inserted between the coil support 4 and a corner of the coil 1, and the coil 1 is inserted through the insulating protective spacer 7 to form a cylindrical iron core 10. The bolt hole 4a on the other side of the L shape of the coil support 4 while being pressed against the inner surface of the
It is fixed to the end plate 12 with a bolt 8 inserted in the.

In the electromagnet thus constructed,
The coil 1 is manufactured with high precision by forming the coil support 4 in a molding die or a cutting process according to the production lot because the inner and outer circumferences do not vary in size because the ground insulation is formed in a vacuum impregnated mold. Therefore, it is possible to prevent the movement in the longitudinal direction with respect to the gap δL between the coil 1 and the end plate 12 via the coil support 4 inserted without a gap.

Further, the coil support 4 is made of a glass fiber reinforced plastic material, and the wall thickness can be made substantially the thickness of the gap δL so that the steel property and the strength can be increased.
It is not deformed by external force from the direction of the back surface 5a.

Next, FIG. 3 shows a case where the cylindrical iron core 22 for electromagnetic force has a cylindrical shape, and shows the case where the cylindrical iron core 22 and the magnetic pole iron core 23 are individually manufactured and fixed with bolts 18. In this case, before fixing the magnetic pole core 23 to the tubular core 22, the coil 1
By inserting the coil support 4 between both sides of the coil 1 and the end plate, the coil 1 is attached to the magnetic pole core 23 in the same manner as in FIGS.
Can be firmly fixed to.

[0014]

As described above, according to the present invention, in an electromagnet having a plurality of magnetic pole cores projecting from the inner periphery of a cylindrical core and a coil bent into a rectangular shape and inserted into the magnetic pole core, the cylindrical core is provided. Between the end face of the magnetic pole in the direction of the center line and the inner circumference of the coil,
By inserting the L-shaped coil support and fixing it to the magnetic pole core, the movement of the coil in the direction of the center line of the cylindrical core was prevented, so the coil can be firmly fixed and the connection of the lead-out part can be done for a long time. It is possible to obtain an electromagnet that can be maintained over a period of time.

[Brief description of drawings]

1 is a partial view showing an embodiment of an electromagnet of the present invention,
(A) is a side view, (b) is an AA sectional view of (a).

FIG. 2 is a perspective view showing a main part of FIG.

FIG. 3 is a partial side view showing another embodiment of the electromagnet of the present invention.

FIG. 4 is a side view showing an example of a conventional electromagnet.

5A and 5B are diagrams showing a main part of a conventional electromagnet, in which FIG. 5A is a side view and FIG. 5B is a cross-sectional view taken along line BB of FIG.

6A is a perspective view showing a main part of FIG. 5, and FIG. 6B is a sectional view taken along line CC of FIG. 5B.

[Explanation of symbols]

1 ... Coil, 2, 22 ... Cylindrical core, 3, 23 ... Magnetic pole core, 4
… Coil support, 5… Unit magnets, 7, 9… Insulating spacers,
12 ... End plate.

Claims (1)

(57) [Scope of utility model registration request] 1. An electromagnet having a plurality of magnetic pole cores projecting from the inner circumference of a tubular core, wherein a coil bent into a rectangular shape is inserted into and attached to the magnetic pole core. An electromagnet, wherein an L-shaped coil support is inserted between the end face of the magnetic pole and the inner circumference of the coil.