Method for reducing stresses of high-field superconducting magnet coils

A technology of superconducting coils and superconducting magnets, applied in the field of MRI, can solve the problems of magnet quenching, large economic losses, and inability of magnets to reach

Active Publication Date: 2018-09-04
南京磁升超导技术有限公司
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Problems solved by technology

However, the heat generated by the conduction of the normal conductor makes the high temperature zone diffuse rapidly, thus causing the quenching of the entire magnet.
The quenching process is irreversible, and all the electromagnetic energy storage will be taken away by the volatilization of liquid helium, which will bring great economic losses, and even the magnet cannot reach the target field strength and is scrapped

Method used

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  • Method for reducing stresses of high-field superconducting magnet coils
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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention is described below through specific embodiments shown in the accompanying drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0041] like Figure 1-12 As shown, the current-carrying conductor will be affected by the Lorentz force in the magnetic field, and the calculation formula of the Lorentz force is: ,

[0042] Among them, F is the electromagnetic force, J is the current density, B is the magnetic field strength, and V is the volume of the superconducting material in the magnet. Due to the limitations of the superconducting material itself, the current passing through the sup...

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Abstract

The invention discloses a method for reducing stresses of high-field superconducting magnet coils. According to the method, splitting and electromagnetic field optimization are carried out on coils satisfying stress demands without changing orders of the coils, and stress analysis and optimization are carried out through a finite element analysis method, so that both electromagnetic fields and stresses of the coils satisfy design demands, electromagnetic field design targets and high-risk factors, coaxial stresses, influencing production realization are jointly brought into the optimal designprocess, and an instructive role is played in MRI superconducting magnet design.

Description

Technical field: [0001] The invention relates to the field of MRI technology, in particular to a method for reducing the coil stress of a high-field superconducting magnet. Background technique: [0002] MRI (Magnetic Resonance Imaging, English full name is: Magnetic Resonance Imaging) technology is one of the most important advanced medical diagnostic technologies at present. The MRI system has a complex structure and consists of multiple core components. Superconducting magnets are the core components of the MRI system. Provide the main magnetic field B0 in the imaging area with high uniformity required for MRI imaging. At present, only a few companies in the world have fully mastered the core technology of superconducting magnets, involving superconducting technology, electromagnetic technology, low temperature and composite material technology, etc., and its technical difficulty and complexity are quite high. [0003] With the development of MRI technology, the resoluti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H01F6/06
CPCH01F6/06G06F30/23Y02E40/60
Inventor 赵华炜史永凌王鹏
Owner 南京磁升超导技术有限公司
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