Magnetic Core Radial Permeability Gradient for Inductor Efficiency
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Solution Overview
Problem
Conventional inductor designs with homogeneous magnetic cores suffer from permeability discrepancies, leading to inefficient energy storage and magnetic field generation due to fringing effect losses and inhomogeneous flux distribution.
Innovation Solution
A magnetic core with a composite material comprising spherically-shaped and flake-shaped magnetic particles suspended in a non-magnetic matrix, where the ratio of flake-shaped particles to spherically-shaped particles increases radially outward from the central orifice, enhancing magnetic permeability and reducing permeability discrepancies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a homogeneous magnetic core is used, then the structure is simple and easy to manufacture, but permeability discrepancies occur leading to inefficient energy storage and fringing effect losses
Solution Approach 1:
The magnetic core employs a non-uniform particle distribution where flake-shaped magnetic particles are concentrated in the outer peripheral region while spherical particles are concentrated in the inner region adjacent to the central orifice. This local differentiation optimizes magnetic permeability at different radial positions, reducing fringing effects and improving energy storage efficiency while maintaining manufacturing feasibility through controlled mixing and forming processes.
Solution Approach 2:
The invention uses a composite magnetic core composed of two distinct particle types (flake-shaped and spherical) with different magnetic properties, suspended in a non-magnetic matrix material. This composite structure allows each particle type to contribute its advantageous properties to different regions of the core, achieving superior overall performance compared to homogeneous materials while remaining manufacturable through established composite forming techniques.
2Ease of manufacture
If a homogeneous magnetic core is used, then manufacturing is straightforward, but inhomogeneous flux distribution occurs reducing energy storage efficiency
Solution Approach 1:
The magnetic core employs a non-uniform particle distribution where flake-shaped magnetic particles are concentrated in the outer peripheral region while spherical particles are concentrated in the inner region adjacent to the central orifice. This local differentiation optimizes magnetic permeability at different radial positions, ensuring more uniform flux distribution throughout the core and improving energy storage efficiency while maintaining manufacturing feasibility through controlled mixing and forming processes.
3Use of energy by moving object
If magnetic permeability is increased radially outward, then energy storage efficiency improves, but the particle arrangement becomes more complex
Solution Approach 1:
The invention systematically varies the particle size parameter and particle shape parameters across the radial dimension of the magnetic core. By controlling the distribution of flake-shaped versus spherical particles as a gradient parameter, the magnetic permeability is optimized at each radial position. This parameter-based approach achieves the desired permeability profile through material composition control rather than complex geometric arrangements, maintaining manufacturing simplicity while improving energy storage efficiency.
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 permeability radially outward from the core's center to its periphery, improving energy storage efficiency and reducing fringing effect losses, thereby optimizing the inductor's performance in generating and storing magnetic fields.
Implementation Method 1
The wire is configured to deliver electrical current to the inductor to generate the magnetic field
Implementation Method 2
The magnetic core comprises a magnetic powder suspended in a non-magnetic matrix
Data Source
AI summary
An inductor that is configured to store energy in a magnetic field includes a wire and a core. The wire is configured to deliver electrical current to the inductor to generate the magnetic field. The core is disposed radially about the wire. The core comprises magnetic particles that are suspended in a non-magnetic matrix. The magnetic particles are arranged such that a magnetic permeability of the core increases in a direction that extends radially outward from the wire along a cross-sectional area of the magnetic core from a first region that is adjacent to the wire to a second region that is adjacent to an outer periphery of the magnetic core.