JPS61190906A - Coil for electromagnet - Google Patents

Abstract

PURPOSE:To form the coil having excellent connection resistance and electrically safe connection structure by a method wherein a metallic substance to be interposed such as a sleeve and the like is arranged on a strand conductor, they are formed in one body using a metallic adhesive substance, and then they are connected to other conductor or a current introducing terminal using a metallic adhesive substance. CONSTITUTION:The conductor 2 consisting of a strand wire 1 is formed in one body at the end part using a metallic adhesive substance 4, then they are formed into the metallic substance to be interposed such as a sleeve and the like, and the whole body of them is connected in one body using a metallic adhesive substance 4. After the above-mentioned structure is formed, each conductor is matched with other conductor, and they are connected using a metallic adhesive substance leaving a sufficient contact area between them, thereby enabling to obtain the structure having excellent characteristics. As a result, the connection having excellent characteristics can be accomplished, and a long-sized coil can be manufactured irrespective of the manufacturable length of the connector. Also, as the sufficient area of connection is provided between the conductors, the coil having excellent connection resistance can be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a connection part of a coil of an electromagnet made of a conductor made of a strand wire.

[Background of the invention]

In recent years, with the diversification of accelerators, electromagnets capable of extremely fast pulse operation have been required. Normal accelerator electromagnets often have a frequency of several Hz even in pulse operation, and solid conductors are used, but when the frequency is about the commercial frequency, the eddy current loss is negligible. Normally, coil loss mainly consists of resistance loss and eddy current loss, but once the current is determined,
Resistive losses are inversely proportional, and eddy current losses are proportional to the square of the cross-sectional area. If optimization is performed to minimize the total value of both, they will end up being of the same order. Regardless of resistance loss, eddy current loss can be sufficiently reduced by using strands of wire. Therefore, it becomes necessary to use a strand conductor in the coil of an electromagnet that performs fast/<lusus operation. A typical cross-sectional example of a conductor is shown in FIG.

On the other hand, since there is a limit to the manufacturing length of the conductor, the coil usually has a connection part inside the coil or an external system (current introduction terminal).
A connection part is required. However, with such a conductor,
Due to its strand structure, sufficient connections could not be made.

In other words, in the case of a normal solid conductor, the conductor surfaces are connected to each other with a suitable metallic adhesive or with a metallic adhesive using a joint piece, but in the case of such a strand conductor,
This normal connection method is not possible because the cooling pipe and the conductor are made of different and independent materials.

Therefore, forming connections within the coil is structurally difficult. In this case, there is a problem that the size of the coil depends on the manufacturing limit of the conductor, making it impossible to manufacture a long coil.

In addition, in the connection part with the outside, conventional methods have been considered to integrate one end of the conductor with a metal adhesive and then connect the current introduction terminal with a metal adhesive, but in this case, it is not enough. Therefore, a problem may occur in the current capacity of the connection part. The conventional method is shown in Figure 2.

[Purpose of the invention]

The object of the present invention is to arrange a strand conductor with a metallic inclusion such as a sleeve, integrate these with a metallic adhesive,
Thereafter, the coil is connected to another conductor or a current introduction terminal using a metallic adhesive, thereby providing a coil having good connection resistance and an electrically safe connection structure.

[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a diagram showing the connection between conductors in the coil, in which the conductor 2 composed of the strand wire 1 is integrated with a metallic adhesive 4 at the end, and then a metallic adhesive such as a sleeve is attached. The entire body is integrally connected with an inclusion 6 and a metallic adhesive 4. After forming such a structure, by aligning the conductors and connecting them with a sufficient contact area with the metallic adhesive 7, a good connection resistance and structure can be obtained.

FIG. 4 is a diagram showing the connection between the conductor and the external system (current introduction terminal). The conductor has a structure as shown in FIG. 3(a), and is connected to the electricity introduction terminal 5 with a sufficient amount of connection.

FIG. 5 shows another embodiment, in which metallic inclusions 6
It consists of several component parts.

This method is an improved method that further increases the electrical connection area between the conductor 2 and the metallic inclusion 6. 3 in the diagram
is a cooling pipe.

〔Effect of the invention〕

According to the present invention, (1) connections within the coil can be made with good characteristics, so long coils can be manufactured regardless of the manufacturable length of the conductor.

(2) It is possible to manufacture a coil with sufficient contact area and good connection resistance.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a method of processing and connecting a conductor to make the connection of the present invention, FIGS. 2 and 3 are diagrams showing a method of connecting a conductor and a current introduction terminal, and FIG. 1 is a diagram showing an example of a typical strand conductor, and FIG. 5 is a diagram showing a conventional connection method between a conductor and a current introduction terminal. DESCRIPTION OF SYMBOLS 1... Strand wire, 2... Conductor, 3... Cooling pipe, 4... Metallic adhesive (between conductors), 5... Current introduction terminal, 6 Figure 1, Figure 2Z (0L) (B No. 4-2

Claims (1)

[Claims] 1. 1. An electromagnetic coil constructed by winding a conductor made of strand wires, wherein the strand wires are connected after being integrated using a metallic inclusion.