Pulse Magnet Device Using Diamagnetic Flux Compression

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Solution Overview

Problem

Conventional pulse magnet devices face challenges in achieving high-intensity and uniform magnetic fields, limiting the number of samples that can be measured simultaneously and requiring lengthy cooling processes due to increased energy consumption and uneven magnetic field distribution.

Innovation Solution

A pulse magnet device based on magnetic flux compression, incorporating a diamagnetic block, reinforcing plates, and a magnet coil, where the diamagnetic block induces an opposite current to compress the magnetic field, increasing magnetic flux density and uniformity, and allowing multiple samples to be measured in an annular field area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the number of turns and layers of coils of a single-stage magnet is increased to increase the intensity of the magnetic field, then the impedance of the pulse magnet is significantly increased, but the pulse of the discharge current is significantly reduced

Engineering Contradiction:
Improvemagnetic field intensityVSAvoidimpedance
Core Design Contradiction:
Illumination intensityVSDevice complexity

Solution Approach 1:

The patent divides the single-stage magnet into multiple stages (first-stage magnet and second-stage magnet). Each stage has its own coil system with optimized turns and layers, avoiding the need for a single complex high-impedance coil. The magnetic fields from multiple stages are superimposed to achieve high intensity while keeping each stage's impedance manageable.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent combines multiple magnet stages and their respective magnetic fields to achieve the desired high field intensity. By merging the output of multiple lower-impedance coil systems, the system achieves high magnetic field strength without the impedance problems of a single high-turn coil.

Inventive Principle:
Principle #5Merging (Combining)

2Quantity of substance

If the aperture of the magnet is enlarged to allow more samples, then the energy required for the magnet dramatically increases, but the magnetic field distribution becomes uneven

Engineering Contradiction:
Improvenumber of samplesVSAvoidenergy consumption
Core Design Contradiction:
Quantity of substanceVSUse of energy by moving object

Solution Approach 1:

The patent transitions from a single large aperture to multiple smaller apertures arranged in different spatial positions. This dimensional arrangement allows multiple samples to be measured simultaneously without requiring a single large aperture that would demand excessive energy and produce uneven field distribution.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

Instead of one large aperture, the system uses multiple smaller apertures distributed across different stages. Each aperture corresponds to a localized region with optimized magnetic field distribution, allowing multiple samples to be processed in parallel with reduced energy consumption per sample.

Inventive Principle:
Principle #1Segmentation

3Quantity of substance

If the aperture of the magnet is enlarged, then more samples can be placed, but the magnetic field distribution becomes uneven making it impossible to guarantee each sample is in the same magnetic field environment

Engineering Contradiction:
Improvenumber of samplesVSAvoidmagnetic field uniformity
Core Design Contradiction:
Quantity of substanceVSMeasurement precision

Solution Approach 1:

The system divides the measurement space into multiple independent regions, each with its own optimized magnetic field. By segmenting the aperture into multiple smaller openings, each sample occupies a localized region with uniform magnetic field characteristics, ensuring measurement precision while allowing multiple samples simultaneously.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Each aperture region is designed with local optimization of magnetic field distribution. The coil windings and geometric parameters are tailored for each local region to ensure uniform field distribution at each sample position, rather than attempting to create a single large uniform field.

Inventive Principle:
Principle #3Local quality

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 solution enhances magnetic field intensity and uniformity, enabling simultaneous measurement of multiple samples with improved experimental efficiency and reduced cooling time, while maintaining mechanical stability and consistency.

Implementation Method 1

The diamagnetic block is used for inducing an induction current opposite to a coil current during a discharge process of the magnet coil

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

compressing a magnetic field to an area between the diamagnetic block and the magnet coil. Intensity and uniformity of the magnetic field around the magnet coil are improved by increasing a magnetic flux density

Methodology Applied
Scientific EffectMagnetic flux compression:

Data Source

PatentUS11493581B2Pulse magnet device based on magnetic flux compression, and high-flux measurement method
Publication Date: 2022.11.08 HUAZHONG UNIV OF SCI & TECH
  • US11493581B2 patent drawing
  • US11493581B2 patent drawing
  • US11493581B2 patent drawing

AI summary

Disclosed are a pulse magnet device based on magnetic flux compression, and a high-flux measurement method. The device includes a diamagnetic block, reinforcing plates, screw rods and a magnet coil. The diamagnetic block and the magnet coil are concentrically arranged in the axial direction; the reinforcing plates are arranged at ends of the magnet coil and the diamagnetic block and are connected by means of the screw rods. The diamagnetic block is used for inducing the induction current opposite the coil current during the discharge of the magnet coil, and for compressing the magnetic field to the area between the diamagnetic block and the magnet coil. The intensity and uniformity of the magnetic field around the magnet coil are improved by means of increasing the magnetic flux density.