JPS605534Y2 - multiple winding coil - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in multi-turn coils.

A multi-wound coil is a cylindrical coil in which a plurality of plate-shaped coils made of a conductor spirally wound on a plane are stacked and connected in series with crossover wires, and is used for magnetic field generation coils in nuclear fusion devices and superconducting magnets. often used as

FIGS. 1 and 2 show a circular multi-turn coil, with 1
4 is a plate-shaped coil in which a conductor 2 is spirally wound in a plane through an interlayer insulator 3; 4 is a ground insulator on the outer periphery of the plate-shaped coil 1;
Reference numeral 5 denotes a reinforcing frame that encloses the plate-shaped coils 1 mutually.

The plate-like coils 1 are connected in series by crossover wires 6, forming one coil as a whole.

Such a multi-turn coil is effective in increasing the magnetomotive force and generates a strong magnetic field.

Figures 3 and 4 show the conventional installation of the crossover wire 6, in which the ends of the conductors 2 of the two plate coils 1 are stretched straight to form the lead conductor 7, and 7 and the crossover wire 6 is metallurgically joined.

In FIG. 5, the lead conductor 7 is metallurgically or mechanically joined to the dummy coil 8 of the conductor 2, and the crossover wire 6 is metallurgically joined.

In this way, conventionally, the lead conductor 7 has a cantilever structure, and while it is very flexible, it is also unstable and has low mechanical strength, and the relative displacement of the coil due to the electromagnetic force acting on the coil is large. In such a case, an excessive force is applied to the lead conductor 7, and there is a risk that the support part of the lead conductor 7 itself or the surrounding insulators 3 and 4 may be destroyed.

Further, the positional accuracy of the lead conductor 7 in the radial and circumferential directions of the coil is likely to be lost, and it is difficult to assemble the connecting wire 6 when the coils are tied together.

The object of the present invention is to provide a multi-wound coil whose lead-out conductor has high mechanical strength and whose assembly work for attaching crossover wires is easy.

An embodiment of the present invention shown in the drawings will be described below.

In FIG. 6, parts having the same functions as those in FIG. 5 are given the same reference numerals, and their explanations will be omitted.

The lead conductor 7 connects both ends 7b of the straight portion 7a to a dummy coil 8.
Alternatively, it may be metallurgically bonded to the conductor 2 to form a support structure at both ends, and a crossover wire 6 may be attached to the straight portion 7a.

Since both ends 7b of the lead conductor 7 are fixed, it is structurally stable and safe in terms of mechanical strength.

Further, since the support of the lead conductor 7 is stable, there is no adverse effect on the surrounding insulators 3.4.

Furthermore, the positional accuracy of the lead conductor 7 in the radial direction of the coil can be easily achieved, and it is only necessary to assemble the coil by paying attention to the positional accuracy in the circumferential direction.

FIG. 7 shows another embodiment, in which the lead conductor 7 is in the middle part 7.
c has a protruding shape with a curvature concentric with the coil, and both ends 7a
is metallurgically joined to the dummy coil 8 or the conductor 2, and a crossover wire 6 is attached to the intermediate portion 7c.

Even if the lead conductor 7 is installed offset in the circumferential direction, the crossover wire 6 can be easily installed.

As described above, according to the present invention, in a multi-wound coil, both ends of the lead conductor are fixed to the conductor on the inner circumferential side or the outer circumferential side of the plate-shaped coil, and the lead conductors are connected with a crossover wire. The mechanical strength of the coil is improved, there is no relative displacement, there is no damage to the surrounding insulation, and the installation position can be easily determined, making it easier to install crossover wires between multiple plate coils. be.

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view showing a conventional multi-wound coil.
Figure 2 is an enlarged cross-sectional view taken along line A-A in Figure 1, Figure 3 is an enlarged cross-sectional view taken along line B-B in Figure 1, and Figure 4 is an enlarged cross-sectional view taken along line A-A in Figure 1.
FIG. 5 is a front view showing an enlarged example of the main part of the figure; FIG. 5 is a front view showing another example; FIG. 6 is a front view showing the main part of one embodiment of the multi-turn coil of the present invention; FIG. 7 is a front view showing another embodiment.

Claims (1)

[Scope of utility model registration request] In a multi-wound coil in which a plurality of plate coils each having a conductor spirally wound on a plane are stacked and connected in series with a crossover wire, an lead-out conductor having both ends fixed to the conductor on the inner or outer circumference side of the plate coil. A multi-wound coil characterized by being connected by a crossover wire.