Coupled Soft Magnetic Layer Structure for Linear Inductor Magnetization
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Solution Overview
Problem
Existing layered structures with magnetic and non-magnetic layers experience constant magnetization at zero when a magnetic field is applied in the longitudinal direction, leading to non-linear magnetization changes.
Innovation Solution
A layered structure comprising a non-magnetic layer sandwiched between upper and lower soft magnetic layers, with coupling soft magnetic layers connected to the side surfaces of the non-magnetic layer, ensuring the magnetization direction remains stable and perpendicular to the applied magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional layered structure with magnetic and non-magnetic layers is used, then the structure is simple, but the magnetization becomes constant at zero when a magnetic field is applied in the longitudinal direction
Solution Approach 1:
The soft magnetic layer is divided into multiple segments (first soft magnetic layer and second soft magnetic layer) separated by a non-magnetic layer. This segmentation allows each layer to be magnetized independently, preventing the entire structure from becoming magnetization-free while maintaining overall stability.
Solution Approach 2:
Different regions of the layered structure are given different magnetic properties. The first and second soft magnetic layers have soft magnetic characteristics that allow them to be magnetized in opposite directions, while the non-magnetic layer provides isolation. This local differentiation ensures that magnetization is maintained in specific regions without affecting the entire structure uniformly.
2Reliability
If the magnetization in the layered structure becomes constant at zero, then the structure maintains stability, but the magnetization cannot change linearly with the external magnetic field
Solution Approach 1:
The magnetic configuration is designed to be dynamic rather than static. When an external magnetic field is applied, the first and second soft magnetic layers can adjust their magnetization states independently, allowing the overall magnetization to change linearly with the external field while maintaining stability through the non-magnetic layer isolation.
Solution Approach 2:
By segmenting the soft magnetic layer into multiple independent layers, each layer can respond dynamically to external magnetic fields. This segmentation enables linear magnetization changes in response to external fields while the non-magnetic layer ensures overall structural stability is maintained.
3Device complexity
If a single soft magnetic layer is used, then the structure is simple, but the magnetization direction cannot be controlled to remain perpendicular to the applied magnetic field
Solution Approach 1:
The layered structure introduces asymmetry by placing soft magnetic layers on opposite sides of a non-magnetic layer. This asymmetric configuration allows independent control of magnetization directions in each layer, enabling the overall magnetization to remain perpendicular to the applied magnetic field while maintaining structural simplicity.
Solution Approach 2:
The problem is solved by transitioning from a single-layer to a multi-layer configuration across different spatial dimensions. The non-magnetic layer creates a spatial separation that allows magnetization vectors to be controlled in different dimensional orientations, ensuring perpendicularity to the applied field while managing 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
Prevents constant magnetization at zero and allows for linear magnetization changes with respect to the external magnetic field, maintaining stability and efficiency in inductor performance.
Implementation Method 1
the magnetization direction remains stable and perpendicular to the applied magnetic field
Implementation Method 2
a magnetic layer and a non-magnetic layer are laminated
Data Source
AI summary
A layered structure includes a non-magnetic layer, an upper soft magnetic layer, a lower soft magnetic layer, and a coupling soft magnetic layer. The upper soft magnetic layer is in contact with atop surface of the non-magnetic layer. The lower soft magnetic layer is in contact with a bottom surface of the non-magnetic layer. The coupling soft magnetic layer is coupled to the upper soft magnetic layer and the lower soft magnetic layer. The coupling soft magnetic layer is in contact with a first side surface and a second side surface of the non-magnetic layer. The first side surface and the second side surface are spaced from each other.