Support Member for Superconducting Magnet Coil Bobbin
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Solution Overview
Problem
In open-type superconducting magnet devices, quench events occur due to deformation of the coil bobbin and movement of superconducting wires, which are difficult to prevent given the strong magnetic field and permanent current state, leading to inefficiencies and resource loss.
Innovation Solution
A support member is strategically placed to prevent deformation of the ring-shaped end plate of the coil bobbin, reducing electromagnetic-induced stress on the main coil and thus minimizing quench occurrences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a permanent current is applied to the superconducting coil to generate a strong static magnetic field, then the magnetic field strength is improved, but the coil bobbin and superconducting wire become difficult to monitor and are prone to deformation
Solution Approach 1:
The support member is installed on the coil bobbin before the superconducting coil is wound and before permanent current is applied. This preliminary structural reinforcement prevents deformation of the coil bobbin and end plates when the strong magnetic field is subsequently generated, allowing the system to maintain both high magnetic field strength and structural reliability
2Stability of the object's composition
If the coil bobbin is made more rigid to prevent deformation, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
Rather than making the entire coil bobbin more rigid (which would increase complexity), the invention segments the reinforcement function into a separate support member that is attached to the existing coil bobbin structure. This support member specifically reinforces the end plates without requiring redesign of the entire bobbin, thus improving stability while minimizing added complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The support member effectively suppresses deformation of the coil bobbin, reducing quench events by up to 30-40% and maintaining the superconducting state more stably, thereby reducing helium consumption and operational downtime.
Implementation Method 1
a superconducting magnet is cooled to a temperature (normally, for example, 4.2 Kelvin, the boiling point of liquid helium) at which the superconducting magnet transitions to a superconducting state; an electric current is applied to the superconducting coil to attain a rated magnetic field
Implementation Method 2
an electric current is applied to the superconducting coil to attain a rated magnetic field after cooling the superconducting magnet
Implementation Method 3
A support member is strategically placed to prevent deformation of the ring-shaped end plate of the coil bobbin, reducing electromagnetic-induced stress on the main coil
Data Source
AI summary
The present invention is to provide a structure that can effectively reduce quench in an open superconducting magnet. In order to do so, a pair of superconducting magnets is respectively provided with a primary coil, a shield coil to suppress a leakage magnetic field of the primary coil, and a coil bobbin. The coil bobbin has a cylindrical part on which the primary coil is wound, a ring-shaped end plate on which the inner periphery part is fixed to an end of the imaging space side of the cylindrical part, and a support member preventing the outer periphery part of the ring-shaped end plate from being displaced on the imaging space side. Hence, deformation of the end plate is suppressed to prevent deformation of the primary coil. This can reduce quench caused by the deformation of the primary coil.