Large-diameter polar field coil wound by hollow rectangular copper conductor and winding method

Abstract

The invention belongs to the nuclear fusion device magnet technology, and discloses a large-diameter polar field coil wound by hollow rectangular copper conductors and a winding method, the coil is composed of coil conductors wound by the hollow rectangular copper conductors, the head ends and the tail ends of the adjacent layers are welded together, the winding directions of the coil conductors of the odd number layers and the coil conductors of the even number layers are from inside to outside, and the winding directions of the coil conductors of the odd number layers and the winding directions of the coil conductors of the even number layers are from inside to outside. The winding directions are opposite; in each layer of coil conductor, the number of actual winding turns of the hollow rectangular copper conductor is not full, and a gap formed by the non-full turns is formed. During winding, all layers of climbing wires are uniformly distributed in the circumferential direction, and the positions are 360/n degrees, 2 times (360/n) degrees... (n-1) times (360/n) degrees and 0 degree in sequence from top to bottom; when n is less than or equal to 6, 1/n turns or 2/n turns are less wound on each layer of coil; when n is larger than 6, the number of turns of each layer of coil is reduced by 1/(n/2), the coil formed through the method can provide enough magnetic field intensity, and the stray magnetic field can be controlled to be minimum.

Description

technical field [0001] The invention belongs to the magnet technology of nuclear fusion devices, and in particular relates to a large-diameter poloidal field coil wound by a hollow rectangular copper conductor and a winding method. Background technique [0002] The poloidal field coil working in the nuclear fusion device has a current as large as tens of hundreds of kA and a diameter of several meters to tens of meters. While providing sufficient magnetic field strength, it is necessary to reduce unnecessary stray magnetic fields , so its winding method and size control are very important. [0003] One of the existing poloidal field coils has a circular segmented structure and is connected by a live joint, which has the disadvantages of large contact resistance and low current carrying capacity. One is that the single-turn copper conductor of the poloidal field coil has a small cross-section and low current carrying capacity; the entire coil has many turns, large inductance...

AI Technical Summary

Problems solved by technology

[0003] One of the existing poloidal field coils is a circular segmented structure, which is connected by a joint, which has the disadvantages of large contact resistance and low current carrying capacity.

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