Non-uniformity compensation winding of slender non-moment coil and compensation method

A technology for compensating windings and non-uniformity, which is applied in the field of electromagnetic fields, can solve the problems of high cost of magnetic shielding tubes, achieve the effects of wide application range, reduce thermal conductivity, reduce magnetic flux noise and thermal noise

Active Publication Date: 2020-04-21
中国船舶重工集团有限公司第七一0研究所
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  • Abstract
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  • Application Information

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Problems solved by technology

Due to the high cost of the magnetic shielding cylinder, the main cost of the system is on the magnetic shielding cylinder

Method used

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  • Non-uniformity compensation winding of slender non-moment coil and compensation method
  • Non-uniformity compensation winding of slender non-moment coil and compensation method

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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0015] This embodiment provides a non-uniformity compensation winding for a slender momentless coil, which is suitable for a slender momentless coil, and its aspect ratio is 7-10. Such as figure 1 As shown, symmetrically adding compensation windings at both ends of the momentless coil can reduce the length of the momentless coil while ensuring the overall non-uniformity of the magnetic field, thereby reducing the cost of the low-frequency weak magnetic field test system.

[0016] The length of the external winding of the slender momentless coil is L, the outer diameter is D, the number of turns is W, the distance between the compensation windings at both ends is l, the diameter is d, and the number of turns is w, while satisfying the following relationship:

[0017] 1) The diameter of the compensation winding d=D;

[0018] 2) Number of turns w=1;

[001...

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Abstract

The invention discloses a non-uniformity compensation winding of a slender non-moment coil and a compensation method. Compensation windings are symmetrically added at two ends of the non-moment coil,the length of an external winding of the slender non-moment coil is L, the outer diameter of the external winding of the slender non-moment coil is D, the distance between the compensation windings atthe two ends is l, the diameter of the compensation windings is d, the number of turns of the compensation windings is w, and the parameters satisfy conditions that: d=D; w=1; when L/D is equal to 7,l/L ranges from 0.676 to 0.678; when L/D is equal to 8, l/L ranges from 0.782 to 0.784; when L/D is equal to 9, l/L ranges from 0.887 to 0.889; and when L/D is equal to 10, l/L ranges from 0.992-0.994. The non-uniformity compensation winding reduces the length of the non-moment coil, and can decrease the cost of a low-frequency low-intensity magnetic field test system.

Description

technical field [0001] The invention belongs to the field of electromagnetic fields, and in particular relates to a non-uniform compensation winding and a compensation method for a slender momentless coil. Background technique [0002] In the low-frequency weak magnetic field measurement test, the method of using a non-torque coil in the shielding cylinder to generate a standard magnetic field is generally used. The simplest and most commonly used is to place a solenoid-type torque-free coil in the shielding cylinder to form a low-frequency magnetic field test system. This method has the advantages of shielding the external interference magnetic field, small interaction between the shielding device and the coil, and a wide lower limit of the reproducible magnetic field range. With the increase of the aspect ratio of the momentless coil (that is, the slender momentless coil), the non-uniformity of the magnetic field in the central area is far better than that of ordinary coi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/02
CPCG01R33/02
Inventor 程华富周昌剑张学斌赵文纯王芬
Owner 中国船舶重工集团有限公司第七一0研究所
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