JPS624847B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil support device that supports the weight and electromagnetic force of a group of stacked circular coils, such as a poloidal coil of a torus-shaped nuclear fusion device.

Generally, a torus-shaped nuclear fusion device is composed of a vacuum vessel 6, a plurality of toroidal coils 7, an air-core current transformer coil (poloidal coil) 8, and the like, as shown in FIG. The vacuum vessel has a trapezoidal or circular donut-shaped cross section, and the plasma 9 is closed therein by magnetic fields in the toroidal direction, poloidal direction, and perpendicular direction. Heating of the plasma 9 is performed by generating an induced voltage in the plasma 9 by an air-core current transformer coil 8 wound near the vacuum vessel 6, and by using a current generated by the induced voltage.

A conventional poloidal coil support device is shown in FIG. In the figure, 1a to 1
c is a coil conductor, 2 is a coil insulator, 3 is a non-magnetic support shelf made of FRP etc. that supports the actual weight of 1 and the electromagnetic force acting in the vertical direction, 4 is a non-magnetic support shelf such as SUS for attaching 3. It is a support pillar. FRP
The support shelf has a structure divided in the circumferential direction.

The arrangement of the coil group is determined based on the required magnetic field configuration, and the position and dimensions of the support shelf are also determined accordingly.

Next, the operation will be explained. Coils 1a to 1c
When a current is passed through the coils, a mutual electromagnetic force is generated between the coils. The electromagnetic force in the radial direction is supported by the rigidity of the coil itself, but the electromagnetic force in the vertical direction and the coil's own weight are
It is supported by a support shelf 3 made of FRP, and the load applied to the support shelf is supported by support columns 4 made of SUS.

As nuclear fusion devices become larger, the current flowing through the coils also increases, generating powerful electromagnetic force. For example, when a downward electromagnetic force is applied to coil 1a, the support shelf between coils 1a and 1b will undergo toxic deformation and exert a force on coil 1b. The same thing can be said about the next stage, and in the end, coil 1
A situation occurs in which the electromagnetic forces of a and 1b propagate to the coil 1c. For that purpose, coil 1
The disadvantage was that excessive pressure was applied to the insulator c, causing it to break.

This invention was made in order to eliminate the drawbacks of the conventional products as described above. By providing a void inside the FRP support shelf, elastic deformation is absorbed there and the force is not applied to the next stage coil. The purpose is to provide structure.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 3, reference numeral 5 denotes a gap provided inside the support shelf 3 in the circumferential direction of the coil.

When a current is passed through the coil group, an electromagnetic force is generated, which acts on the support shelf 3 along with the weight of the coil, causing the support shelf to undergo elastic deformation. If a gap 5 larger than the amount of elastic deformation is provided inside the support shelf, the deformation will be absorbed there and no force will be exerted on other coils.

As described above, according to the present invention, since a gap is provided in the support, the electromagnetic force and self-weight of the coil are absorbed in each support and are not propagated to others, so that excessive pressure is not applied to a specific coil insulator. There is no damage, and damage can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing the configuration of a general torus-shaped nuclear fusion device, FIG. 2 is a perspective view showing a conventional coil support device, and FIG. 8 is a coil support device according to an embodiment of the present invention. FIG. 1 is a coil conductor, 2 is a coil insulator, 3 is a support shelf, 4 is a support column, and 5 is a cavity. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A support body that supports a plurality of horizontally stacked circular coils by dispersing their own weight and vertical electromagnetic force, with a gap between the gap and the coils. 1. A coil support device, characterized in that the support body is disposed in the gap, and the elastic deformation of the coil is absorbed by the gap. 2. The coil support device according to claim 1, wherein the gap is provided in the circumferential direction of the circular coil.