Composite Magnetic Core Structure for Compact High-Inductance Rectifiers
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Solution Overview
Problem
Conventional magnetic elements used in rectifiers have bulky volumes and low inductance, leading to inefficiencies that are not satisfactory for modern communication infrastructure needs, particularly in converting AC power to DC power.
Innovation Solution
A magnetic element comprising a ferrite first magnetic core with high permeability (>700) and a molded alloy second magnetic core, where the coil and part of the first core are covered by the second core, reducing volume by 20% and increasing inductance to 600 μH while enhancing flexibility through adjustable shape molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional magnetic elements are used in rectifiers, then the structure is simple and easy to manufacture, but the volume is bulky and inductance is low
Solution Approach 1:
The patent uses a composite magnetic core structure combining ferrite material (first magnetic core) and alloy material (second magnetic core). The ferrite core provides high magnetic permeability while the alloy core reduces volume, achieving both compact size and high inductance. This composite approach resolves the contradiction between volume reduction and manufacturing feasibility.
Solution Approach 2:
The magnetic core is divided into two separate components: a ferrite magnetic core and an alloy magnetic core. Each segment serves a specific function - the ferrite segment provides high permeability for inductance, while the alloy segment reduces overall volume. This segmentation allows optimization of each part's properties independently while maintaining manufacturability.
2Reliability
If conventional magnetic elements are used in rectifiers, then the structure is simple, but the inductance is low and efficiency is unsatisfactory
Solution Approach 1:
The dual-material composite core structure enhances efficiency by combining the high permeability advantage of ferrite with the volume-reduction advantage of alloy materials. This results in higher inductance (600 μH) and improved power conversion efficiency, justifying the increased structural complexity.
Solution Approach 2:
Different regions of the magnetic core have different material properties optimized for specific functions. The ferrite region provides high magnetic permeability for inductance generation, while the alloy region provides structural compactness. This local differentiation of material quality achieves high efficiency 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
The solution results in a more compact, efficient magnetic element with higher inductance, improving the performance of rectifiers and reducing carbon emissions by enhancing power conversion efficiency.
Implementation Method 1
The first magnetic core is made of a ferrite material, and a magnetic permeability of the first magnetic core is higher than 700
Implementation Method 2
The coil is installed on the first magnetic core
Data Source
AI summary
A magnetic element includes a first magnetic core, a coil and a second magnetic core. The first magnetic core is made of a ferrite material, and a magnetic permeability of the first magnetic core is higher than 700. The coil is installed on the first magnetic core. The second magnetic core is formed by molding an alloy composition. In addition, the coil and at least a portion of the first magnetic core are covered by the second magnetic core.