Superconductive Magnet Coil Binding Structure

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Solution Overview

Problem

Superconductive magnets with air-core coils face challenges in maintaining a superconductive state due to wire movement and frictional heat, leading to quench occurrences, and design limitations restrict the magnetic field strength and coil size, making it difficult to downsize the magnet while preventing quench.

Innovation Solution

The superconductive magnet employs a pair of bobbin bodies supported by outer and inner circumference-side binding portions, including belt-shaped or wire-shaped tension members that connect and adjust tension to securely bind the coil, preventing frictional heat and allowing for a stronger magnetic field without increasing coil size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If an air-core coil is used to reduce magnet size, then the device complexity is reduced, but wire movement and frictional heat cause quench occurrences reducing reliability

Engineering Contradiction:

Improvecoil structureVSAvoidsuperconductive state stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The coil support structure is segmented into multiple bobbin bodies arranged circumferentially, with binding portions positioned at different locations to independently constrain different segments of the coil, preventing wire movement without requiring a complex overall structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The binding portions are pre-configured to impart tension to the coil in the radial direction before operation, establishing proper pre-tensioning that prevents wire movement and frictional heat generation during superconductive operation

Inventive Principle:

Principle #10Preliminary action

2Strength

If the coil size is increased to generate a stronger magnetic field, then the magnetic field strength is improved, but the magnet cannot be downsized

Engineering Contradiction:

Improvemagnetic field strengthVSAvoidmagnet size

Core Design Contradiction:

StrengthVSVolume of moving object

Solution Approach 1:

The binding portions can adjust tension parameters in the radial direction to optimize coil compression and magnetic field generation efficiency, allowing stronger magnetic fields without proportional increases in coil size

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The bobbin bodies are constructed from composite materials with high strength-to-weight ratios, enabling compact magnet design while maintaining the structural integrity needed to support high magnetic field generation

Inventive Principle:

Principle #40Composite materials

3Reliability

If binding force is applied to prevent wire movement, then quench is prevented, but frictional heat may still occur reducing reliability

Engineering Contradiction:

Improvequench preventionVSAvoidfrictional heat

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The binding portions act as intermediaries between the bobbin bodies and the coil, distributing binding forces through multiple contact points and reducing localized friction that would generate heat

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The binding portions are designed to dynamically adjust to coil expansion and contraction during operation, maintaining optimal tension without creating excessive frictional heat through rigid constraint

Inventive Principle:

Principle #15Dynamics

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

This configuration effectively reduces quench occurrences by minimizing frictional heat and allowing for a more robust magnetic field generation within a compact design, enhancing the reliability and efficiency of the superconductive magnet.

Implementation Method 1

A superconductive coil is disposed in the vacuum chamber to generate a high magnetic field in the space

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

Cooling means integrated with a Gifford McMahon (GM) refrigerator is provided above the superconductive coil. A cold head of the cooling means is connected to an upper flange via a cooling stage. Since the superconductive coil is cooled by the cooling means, a high magnetic field can be generated

Methodology Applied

Scientific EffectCooling: Cooling

Data Source

PatentUS8952775B2Superconductive magnet

Publication Date: 2015.02.10 SUMITOMO HEAVY IND LTD

AI summary

A superconductive magnet includes a superconductive coil that is an air-core coil; a pair of bobbin bodies that support the superconductive coil while interposing the superconductive coil therebetween on both sides of a center axial line direction of the superconductive coil; an outer circumference-side binding portion that extends in the center axial line direction on an outer circumferential side of the superconductive coil to bind the pair of bobbin bodies; and a belt-shaped or a wire-shaped inner circumference-side tension imparted portion which extends in the center axial line direction on an inner circumferential side of the superconductive coil to connect the pair of bobbin bodies, and on which tension is imparted in the center axial line direction.