2D Magnetic Moment Composite for High-Frequency Soft Magnetics
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Solution Overview
Problem
Traditional soft magnetic materials, such as laminated silicon steel sheets and soft magnetic ferrites, face limitations in operating frequency, leading to inefficiencies in power conversion and miniaturization, particularly below 100 KHz due to the Snoek limit, hindering their application in higher frequency and microwave bands.
Innovation Solution
A soft magnetic composite with a two-dimensional magnetic moment is developed, comprising an insulating matrix with two-dimensional magnetic moment micropowder, where magnetic moments are distributed in specific planes, allowing for higher resonance frequencies and improved magnetic properties by using artificial and intrinsic two-dimensional magnetic moment micropowders with specific crystalline structures and orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional soft magnetic materials (laminated silicon steel sheet or soft magnetic ferrite) are used, then saturation magnetization is maintained or high-frequency operation is achieved, but operating frequency is limited (below 100 KHz due to Snoek limit)
Solution Approach 1:
The patent uses composite materials by combining soft magnetic micropowder particles with an insulating matrix material to create a soft magnetic composite. This composite structure allows the material to operate at frequencies above 100 KHz while maintaining stable magnetic properties, overcoming the Snoek limit that restricts traditional soft magnetic materials to below 100 KHz operation.
2Quantity of substance
If laminated silicon steel sheet is used, then high saturation magnetization is achieved, but eddy current loss increases sharply at higher frequencies
Solution Approach 1:
The patent applies local quality by coating each soft magnetic micropowder particle with an insulating layer, creating localized electrical insulation at the particle level. This prevents eddy current formation between particles while maintaining the high saturation magnetization of the soft magnetic material, enabling operation at frequencies above 100 KHz with reduced energy loss.
3Speed
If soft magnetic ferrite is used, then high-frequency operation is achieved, but magnetic flux density is low leading to low conversion efficiency
Solution Approach 1:
The patent merges the advantages of soft magnetic materials (high saturation magnetization) with insulating materials (high resistivity) by creating a composite structure where soft magnetic micropowder particles are dispersed in an insulating matrix. This combination enables the material to operate at high frequencies above 100 KHz while maintaining high magnetic flux density and power conversion efficiency.
4Ease of manufacture
If conventional soft magnetic composites are used, then manufacturing ease is improved, but operating frequency is limited below 100 KHz-200 KHz due to Snoek limit
Solution Approach 1:
The patent changes the structural parameters of the soft magnetic composite by using micropowder particles with specific size distributions (average diameter 1-10 μm) and coating them with insulating materials. This parameter modification allows the composite to operate at frequencies above 100 KHz while maintaining ease of manufacture through conventional mixing and molding processes.
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 soft magnetic composite with a two-dimensional magnetic moment breaks through the Snoek limit, enabling operation in higher frequency and microwave bands, facilitating miniaturization, lightweight devices, and efficient power conversion, with enhanced magnetic permeability and broad application prospects.
Implementation Method 1
two-dimensional magnetic moment micropowder, where magnetic moments are distributed in specific planes
Implementation Method 2
intrinsic two-dimensional magnetic moment micropowders with specific crystalline structures and orientations
Implementation Method 3
insulating matrix with two-dimensional magnetic moment micropowder
Implementation Method 4
the basic function of soft magnetic materials operating at different frequencies is to convert electromagnetic energy or electromagnetic signals
Data Source
AI summary
The present disclosure relates to a soft magnetic composite with a two-dimensional magnetic moment and a high working frequency band, and a preparation method therefor. According to an embodiment, the soft magnetic composite with a two-dimensional magnetic moment may comprise: an insulating matrix; and two-dimensional magnetic moment micropowder dispersed in the insulating matrix, wherein inside the two-dimensional magnetic moment micropowder, a magnetic moment is distributed in a specific two-dimensional plane. The soft magnetic composite with a two-dimensional magnetic moment of the present disclosure has a higher cut-off frequency than existing materials, and therefore can be widely applied in the field of high frequency microwave application.