JPH0210707A - Method of winding coil for producing magnetic field - Google Patents

Abstract

PURPOSE:To reduce the size and the cost by winding hollow conductors in the even-numbered layers as to a mechanical structure and by drawing starting ends and finishing ends to one side of a coil for making an opening as well as by connecting each coil electrically in series. CONSTITUTION:Several number of electrically insulated hollow conductors, being placed adjacent each other, are wound mechanical structurally in the even-numbered layers. Then, starting ends 1, 2, 3, 4 and finishing ends 11, 22, 33, 44 are drawn to one side of a coil for making an opening. The coils are connected in series electrically to make them into one coil. By this, a space required for terminal treatment can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview of the Field] The present invention relates to a method of winding a magnetic field generating coil using a hollow conductor.

[Contents and problems of conventional technology]

As shown in Figure 4, coils traditionally used to generate magnetic fields are made by winding a hollow conductor with a hole inside the copper wire into a coil, and water can be passed through the hole to directly cool the conductor. It has a structure.

Coils using this material have a higher cooling effect than coils using other conductors. Therefore, the amount of current that can be passed through this conductor can be made larger than other conductors, and the more the number of channels in the coil is divided, the more the cooling efficiency improves, and even with the same cross-sectional area of the conductor, a larger current can be passed. .

Generally, the number of channels in a coil is the largest, and it is divided by the number of layers in the coil. However, as shown in Figures 3(a) and (b), if the coil (one pancake) of one channel is made into four layers with six turns per layer and a total of 24 turns, the terminal of each conductor is connected to each layer of the coil. The beginning of winding is 7. 8. 9 and 10, and the winding ends are on both sides of the coil, such as 77, 88.99, and 101, so such windings are not preferred if there are spatial constraints on the processing of the coil terminals. Therefore, Fig. 2(a).

As shown in (b), winding is performed in a structure in which two-layer, 12-turn, single-channel coils (W pancakes) are stacked in two layers so that all the terminals are gathered on one side. In this case, the winding starts of the two coils are indicated by 5 and 6, respectively, and the winding ends are indicated by 55.66. However, in the W pancake structure, the conductor length is doubled compared to a single pancake coil, so the water friction in the hollow conductor is doubled and the water flow is reduced, resulting in a poor cooling effect. When using a power source, W pancakes require a larger cross-sectional area of the conductor and a thicker hollow section than single pancakes, which has the drawbacks of making the coil pancake larger as a whole and increasing costs. Ta.

[Purpose of the invention]

In order to eliminate these drawbacks, the present invention allows all of the coil terminals to be brought out on one side of the coil to save terminal processing space, and also provides cooling efficiency equivalent to or greater than that of a coil wound in one pancake. It is an object of the present invention to provide a method for winding a coil which is small in size and advantageous in cost, and which can reduce the cross-sectional area of the coil.

Blank space below [Structure of the Invention] The present invention involves winding a plurality of electrically insulated hollow conductors adjacent to each other at the same time, winding them in an even number of layers mechanically, and winding each wire in an even number of layers. This is a coil winding method characterized by pulling out the starting end and the ending end to one side of the coil to open the coil, and electrically connecting each coil in series to form -1 coils. It is an object of the present invention to provide a magnetic field generating coil that saves processing space, is compact as a whole, has a good cooling effect, and is advantageous in terms of cost.

[Explanation based on examples]

Examples of the present invention will be described below. That is, Figure 1 (
In a) and (b), two hollow conductors constituting the coil are connected at the same time.
Equivalent to stacking the inner W pancake wound in two layers using this method, and then stacking the W pancake similarly wound on the outside for 4M with 6 turns per layer for a total of 24 turns. It shows a coil. In reality, the number of turns per conductor is much smaller, and the whole structure is made up of four 6-turn coils stacked on two W pancakes, which are made by stacking two 3-turn coils in parallel in two layers. This is the conventional coil cross-sectional area in Figures 2 (a), (b), and 3 (a).
) and (b), first of all, the terminal of each coil is
As shown in FIGS. 1(a) and (b), the winding starts from 1. 2.3, and 4, and the winding ends are all gathered to one side as shown at 11, 22, 33, and 44, and are the same as in Figures 2 (a) and (b), and -. The coil length is half this, as shown in Figure 3(a).

Same as (b).

Therefore, each coil terminal is gathered on one side of the coil, which is advantageous in terms of terminal processing space, and the frictional resistance of the water flow is half that of the coils in Figure 2 (a) and (b), which can be processed at the same terminal, improving the cooling effect. , it becomes possible to use a coil with a much smaller cross-sectional area.

Thus, according to the winding method of FIGS. 1(a) and (b), the conventional method of FIGS. 2(a), (b), 3(a),
(b) It is possible to provide a winding method that combines the advantages of each, is compact as a whole, has excellent terminal processing space, and has excellent cooling efficiency and is advantageous in terms of cost. Generally, the same effect can be obtained by using multiple hollow conductors and winding them into an even number of layers. for example,
For n hollow conductors, the frictional resistance is 1/n of one, and if multiple layers are wound, the ends will always gather on one side of the coil. Electrically, by connecting the ends and beginnings of a coil divided into n parts, a single connected coil can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a method for winding a magnetic field generating coil that is advantageous in terms of space for coil terminal processing, has an excellent cooling effect, is small in size as a whole, and is advantageous in terms of cost.

[Brief explanation of the drawing]

Figure 1 shows (a) a plan view and (b) a CC cross-sectional view of the coil when two hollow conductors are placed adjacent to each other and W pancakes are wound six times in two layers and stacked in two layers. shows. Figure 2 shows the structure of a conventional coil W pancake,
(a) shows a plan view, and (b) shows a BB sectional view. The -th layer and the second layer are made of the same single hollow conductor, and -2 layers have 6 turns per circumference, and two 12-turn W pancakes are stacked on top of each other, and the ends of the coils come out from one direction. ing. Figures 3(a) and 3(b) show one of the typical coil shapes of a conventional single-layer waterway, where (a) is a plan view and (b) is a
A sectional view is shown. The coil in the drawing consists of hollow conductors wound six times in a single layer (one pancake) stacked in four tiers. FIG. 4 is a perspective view of the terminal portion of the hollow conductor. Margin 1 below: Start of winding of the first coil of the present invention. 11... End of winding of the first coil of the present invention. 2...Start of winding the second coil of the present invention. 22... End of winding of the second coil of the present invention. Death...Start of winding the third coil of the present invention. 33... End of winding of the third coil of the present invention. 4...Start of winding the fourth coil of the present invention. 44... End of winding of the fourth coil of the present invention. 5...Start winding the first coil of the conventional W pancake. 55...The end of winding the first coil of a conventional W pancake. 6...Start winding the second coil of the conventional W pancake. 66...The end of winding the second coil of the conventional W pancake. 7...Start winding the first coil of the conventional W pancake. 77...The end of winding the first coil of a conventional W pancake. 8...Start winding the second coil of the conventional W pancake. 88...The end of winding the first coil of a conventional W pancake. 9...Start winding the third coil of the conventional W pancake. 99...The end of winding the first coil of a conventional W pancake. 10...Start winding the fourth coil of the conventional W pancake. 101...The end of winding the first coil of a conventional W pancake. Figure 7 (C1) (b)

Claims (1)

[Claims] In the configuration of a magnetic field generating coil, multiple electrically insulated hollow conductors are placed adjacent to each other and wound at the same time. Mechanically, they are wound in an even number of layers, and the starting end of each A method for winding a magnetic field generating coil, characterized in that the terminal end is pulled out to one side of the coil to open it, and each winding is electrically connected in series.