Multilayer Inductor Asymmetric Geometry for DC-Superposing
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Solution Overview
Problem
Conventional multilayer inductance elements face challenges in achieving a desired DC-superposing characteristic due to magnetic saturation caused by the concentration of magnetic fluxes, which results in a lowered inductance value.
Innovation Solution
The electronic component is designed with a laminated body formed by stacking magnetic and non-magnetic layers, where the conductor is embedded and positioned to have shorter end surfaces relative to the side surfaces, allowing for better leakage of magnetic fluxes and preventing magnetic saturation, thereby maintaining a desired DC-superposing characteristic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conductor pattern is provided in the laminated body with conventional dimensions, then the inductance element can be manufactured with standard geometry, but magnetic saturation occurs due to heavy concentration of magnetic fluxes
Solution Approach 1:
The patent applies asymmetry by making the end surfaces shorter than the side surfaces in the laminated body. This asymmetric geometry changes the magnetic flux distribution, allowing fluxes to leak through the side surfaces rather than concentrating at the end surfaces, thereby preventing magnetic saturation and improving DC-superposing characteristics
Solution Approach 2:
The patent utilizes the third dimension by controlling the relative lengths of different surfaces of the laminated body. By making the end surfaces shorter than the side surfaces, it creates a specific three-dimensional geometry that directs magnetic flux leakage through the side surfaces, resolving the magnetic saturation problem
2Reliability
If the end surfaces are made shorter than side surfaces, then magnetic flux leakage is improved and saturation prevented, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a quantitative parameter relationship (end surface length ≤ side surface length) that defines the optimal geometry for magnetic flux leakage. This parameter control approach ensures consistent performance while providing clear manufacturing guidelines
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
This design effectively prevents magnetic saturation and achieves a desired DC-superposing characteristic by ensuring magnetic fluxes leak out through the side surfaces, maintaining inductance value stability across varying currents.
Implementation Method 1
Magnetic fluxes are difficult to pass through the non-magnetic ceramic layer 507 and therefore leak out through the side surfaces of the laminated body 502
Implementation Method 2
The conductor pattern 504 is provided in the laminated body 502 and extends linearly to connect the end surfaces of the laminated body 502. The conductor pattern 504 forms a coil.
Data Source
AI summary
A laminated body is formed by stacking insulating layers to be formed into a rectangular parallelepiped shape. A linear conductor is stacked together with the insulating layers and connects end surfaces of the laminated body that are opposed to each other with respect to a first direction. Lengths of the end surfaces of the laminated body in a second direction, which is perpendicular to the stacking direction and the first direction, are equal to or smaller than the lengths of the end surfaces in the stacking direction.