Superconducting Coil Quench Detection via Differential Measurement
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Solution Overview
Problem
Existing devices for detecting quench in superconducting coils suffer from reduced detection sensitivity due to the presence of magnetic materials, leading to delayed detection and increased burnout risk, as the voltage deviations between terminals are not effectively cancelled out.
Innovation Solution
The device employs two superconducting coils with identical shapes, axes, and winding wire lengths, with an intermediate tap and co-wound winding wires, to ensure equal influence from magnetic materials, thereby offsetting disturbances and enhancing detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage measurement is performed between terminals of superconducting coils, then quench detection is enabled, but detection sensitivity is reduced due to magnetic material interference
Solution Approach 1:
The invention uses a second superconducting coil as a copy of the first superconducting coil, with identical shape, size, and winding wire length. This copied structure experiences the same magnetic interference, allowing the interference to be cancelled out when calculating voltage deviation, thereby restoring detection sensitivity
Solution Approach 2:
The second superconducting coil acts as an intermediary that experiences identical magnetic interference from surrounding magnetic materials. By measuring voltage across this intermediary coil and comparing it with the first coil, the magnetic interference is eliminated through differential measurement
2Loss of time
If standard voltage deviation measurement is used, then quench detection is possible, but lower limit of voltage deviation is increased leading to delayed detection
Solution Approach 1:
By creating an identical copy of the superconducting coil configuration, the system enables differential measurement that cancels out common-mode magnetic interference, thereby reducing the minimum detectable voltage deviation and enabling earlier quench detection
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 reduces the lower limit of voltage deviation for quench detection, allowing for quicker and more sensitive quench detection, thereby reducing the risk of burnout in superconducting coils.
Implementation Method 1
A superconducting coil of this device is constituted of a first superconducting coil and a second superconducting coil that are connected in series
Implementation Method 2
A device for detecting a quench in a superconducting coil is known
Data Source
AI summary
A device for detecting a quench in a superconducting coil according to one aspect of the invention includes a first superconducting coil and a second superconducting coil that are connected in series. The first superconducting coil and the second superconducting coil have the same shape. A first axis of the first superconducting coil and a second axis of the second superconducting coil are arranged at the same position and in the same direction, and the position of the first superconducting coil and the position of the second superconducting coil in the direction of the first and second axes are the same. The length of a winding wire of the first superconducting coil and the length of a winding wire of the second superconducting coil are equal to each other.