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A regular octagonal three-ring magnetic field coil

A technology of regular octagon and magnetic field coil, applied in the field of regular octagon three-ring magnetic field coil, can solve the problems of low uniformity order, uneven force, change of coil constant, etc., and achieves good uniformity, improved uniformity, The effect of low non-uniformity

Inactive Publication Date: 2016-06-15
710TH RES INST OF CHINA SHIPBUILDING IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current coil structure generally adopts two-ring circular or square Helmholtz coils. Whether it is a circular or square Helmholtz coil, it is a fourth-order uniformity coil, and the uniformity order of the coil is low. To achieve uniformity in a certain area, the geometric size of the coil is relatively large, and in the actual processing of the coil, it is difficult to process the skeleton of the circular coil when the size is close to 1m or larger, and the skeleton of the square coil is relatively easy to process and manufacture , but during winding, due to the existence of right angles, the force on the wire coil is not uniform, so the coil loosens after a long time of work, resulting in a change in the coil constant, which in turn affects the uniform area of ​​the coil

Method used

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  • A regular octagonal three-ring magnetic field coil
  • A regular octagonal three-ring magnetic field coil
  • A regular octagonal three-ring magnetic field coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take three regular octagonal coils with equal side lengths and centroid distances as an example for illustration.

[0021] Such as figure 2 Shown is a schematic diagram of a regular octagonal coil, where the vertical distance from the center of the coil to each side is a (the center distance), and the side length of each side of the regular octagonal coil is b, which can be deduced from the geometric relationship b = ( 2 2 - 2 ) a .

[0022] According to the Biot-Safar law, the magnetic induction intensity generated by any side of the regular octagonal coil with current I at point P is as follows: image 3 As shown, are:

[0023] B 1 / = μI 2 ...

Embodiment 2

[0048] Take three regular octagonal coils with the same number of turns as an example for illustration.

[0049] The specific reasoning process is similar to Embodiment 1, and will not be repeated here. When the turns of the three regular octagonal coils are equal, the three regular octagonal coils are arranged at equal intervals, and the center between two adjacent coils Distance d / 2 and the centroid distance a of the coil at the middle position 1 The ratio of is 0.70409, and the apothem a of the regular octagonal coil in the middle position 1 The centroid distance a of the regular octagonal coil located on both sides 2 satisfy the relationship:

[0050] a 2 a 1 = 0.82447 .

[0051] The three regular octagonal coils in the present invention are respectively wound on the regular octagonal skeleton, the distance between the three regular octag...

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PUM

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Abstract

The invention discloses a regular octagonal tri-cyclic magnetic field coil which comprises three regular octagonal coils, wherein the axes of the three regular octagonal coils are coincided, and the three regular octagonal coils are same in current size and direction. Compared with a traditional Helmholtz coil, the regular octagonal tri-cyclic magnetic field coil is a six-level uniformity coil; non-uniform degree of the magnetic field is reduced by two orders of magnitudes; the uniformity of a magnetic field region created by the coil in same physical dimension is obviously increased; the regular octagonal tri-cyclic magnetic field coil has the characteristics of easiness in processing and mounting.

Description

technical field [0001] The invention relates to a magnetic field coil, in particular to a regular octagonal three-ring magnetic field coil capable of producing sixth-order uniformity. Background technique [0002] Artificially create a magnetic field space to form a non-magnetic space or generate a vector magnetic field. Coil technology is usually used. The core of coil technology can be expressed in popular terms: the higher the level of uniformity of the magnetic field, the better. The geometric size of the coil and the geometric size of the uniform area The smaller the ratio, the better. [0003] The current coil structure generally adopts two-ring circular or square Helmholtz coils. Whether it is a circular or square Helmholtz coil, it is a fourth-order uniformity coil, and the uniformity order of the coil is low. To achieve uniformity in a certain area, the geometric size of the coil is relatively large, and in the actual processing of the coil, it is difficult to proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F5/00H01F5/02H01F41/04
Inventor 宋新昌程华富周鹰韩晓东杨云
Owner 710TH RES INST OF CHINA SHIPBUILDING IND CORP