Dual-Yoke Spiral Magnetization for Thick Disc Magnets
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Solution Overview
Problem
Single yoke magnetization methods for thicker magnets result in neutral axis variations and reduced accuracy, particularly when flipping the yoke multiple times.
Innovation Solution
Dual yoke magnetization using two magnetic yokes with spiral profiles disposed on opposite sides of a disc-shaped magnet, generating uniform magnetization and flux distribution through spiraled wires around each yoke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single yoke magnetization is used for thicker magnets, then the magnetization process can be completed with one yoke, but neutral axis variations occur and accuracy deteriorates
Solution Approach 1:
The single magnetization yoke is divided into two separate yokes (first magnetic yoke and second magnetic yoke) positioned on opposite sides of the disc-shaped magnet. Each yoke independently contributes to the magnetization process, eliminating neutral axis variations that occur with single yoke flipping and achieving more uniform flux distribution throughout the magnet thickness.
2Manufacturing precision
If the single yoke is flipped multiple times for thicker magnets, then the entire magnet can be magnetized, but the process time increases and productivity decreases
Solution Approach 1:
By segmenting the magnetization source into two simultaneously active yokes positioned on opposite sides, the system achieves complete magnetization of thick magnets in a single operation without requiring repeated flipping, thereby maintaining high uniformity while improving productivity.
Solution Approach 2:
The solution transitions from a single-sided sequential magnetization approach to a dual-sided simultaneous magnetization approach, adding the dimension of spatial distribution. This allows magnetic flux to penetrate the entire thickness of the magnet from both directions at once, eliminating the need for repeated operations.
3Device complexity
If single yoke magnetization is used, then the apparatus structure is simple, but flux distribution becomes non-uniform
Solution Approach 1:
The magnetization system is segmented into two yokes positioned on opposite sides of the magnet, each contributing to the overall flux distribution. This segmentation creates a more balanced and uniform magnetic field throughout the magnet volume, eliminating the non-uniform flux distribution inherent in single-yoke configurations.
Solution Approach 2:
The two yokes act as counterbalancing magnetic sources positioned on opposite sides of the magnet. Their opposing positions create complementary magnetic flux paths that balance each other, resulting in uniform flux distribution and stable magnetic field composition throughout the magnet structure.
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
Improves magnetization accuracy by reducing average vertical and radial field flux variations by approximately 33% from ±3.1 degrees to ±2 degrees, achieving uniform flux and magnetization.
Implementation Method 1
two magnetic yokes configured to induce magnetization in the substantially disc-shaped magnet
Implementation Method 2
two magnetic yokes configured with spiral profiles... configured to induce magnetization
Data Source
AI summary
Methods, systems, and apparatuses are provided for dual yoke magnetization. Two magnetic yokes may be configured with spiral profiles. A first magnetic yoke of the two magnetic yokes may be disposed proximate to the first side of a substantially disc-shaped magnet, wherein the substantially disc-shaped magnet defines a cavity approximately at its center. A second magnetic yoke of the two magnetic yokes may be disposed proximate to a second side of the substantially disc-shaped magnet, wherein the second side is opposite the first side. Magnetization may be induced in the substantially disc-shaped magnet via activating the two magnetic yokes.