Annular Inductor Core Structure for Inductance and Magnetostriction
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Solution Overview
Problem
Existing inductor components with annular cores face reduced inductance due to smaller cross-sectional areas when the entire core is enclosed in a casing, limiting their performance.
Innovation Solution
An inductor component design featuring an annular core with an insulating member and an elastic buffer member, where the core and insulating member are bonded with the buffer member in between, allowing for increased cross-sectional area and reduced magnetostriction influence, while preventing the buffer material from protruding and interfering with the coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire core is enclosed in a casing, then the core is protected and positioned, but the cross-sectional area of the core is reduced and inductance decreases
Solution Approach 1:
The insulating member is divided into multiple parts: a first insulating member covering part of the core and a second insulating member covering another part. This segmentation allows the core to maintain a larger cross-sectional area in regions not covered by insulating members, thereby preserving inductance while still providing protection and positioning where needed.
Solution Approach 2:
Instead of uniformly enclosing the entire core, the insulating members are applied locally to specific portions of the core. This local quality approach ensures that the core maintains its full cross-sectional area in critical regions for inductance while providing insulation and positioning only where necessary for stability and protection.
2Object-affected harmful factors
If the core is entirely covered by insulating member, then insulation is improved, but the cross-sectional area and inductance are reduced
Solution Approach 1:
The insulating member is segmented into multiple portions that cover different areas of the core. This segmentation strategy provides sufficient insulation performance at the interfaces and critical regions while leaving other regions of the core exposed, thereby maintaining the core's cross-sectional area and inductance.
Solution Approach 2:
Instead of applying insulating material to the entire core surface, insulation is applied partially only to the extent necessary for electrical isolation and mechanical stability. This partial action approach achieves adequate insulation performance without unnecessarily reducing the core's effective cross-sectional area.
3Stability of the object's composition
If buffer member is provided between core and insulating member, then core positioning is stabilized, but magnetostriction influence increases
Solution Approach 1:
The buffer member acts as an intermediary between the core and the insulating member, providing mechanical cushioning and stable positioning. The buffer member absorbs mechanical stresses and prevents direct contact between the core and rigid insulating structures, thereby reducing the transmission of magnetostriction-induced vibrations while maintaining positional stability.
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 design stabilizes the core, increases inductance, and reduces the impact of magnetostriction on electrical characteristics, while maintaining a compact size and preventing interference with the coil.
Implementation Method 1
a buffer member that is elastic. The core has a first face, a second face that crosses the first face, and a third face that faces the second face and crosses the first face. The insulating member is provided to cover the first face, a portion of the second face, and a portion of the third face. The core and the insulating member are bonded to each other with the buffer member interposed therebetween.
Implementation Method 2
the buffer member is provided in a portion of a space between the insulating member and the core, and the space between the insulating member and the core includes a region in which the buffer member is not provided. According to this embodiment, the region in which the buffer member is not provided, that is, a region in which the core and the buffer member are not in contact with each other, is provided. Therefore, the influence of magnetostriction on the core can be reduced.
Data Source
AI summary
An inductor component includes a core having an annular shape; an insulating member that covers a portion of the core; a coil wound around the core and the insulating member; and a buffer member that is elastic. The core has a first face, a second face that crosses the first face, and a third face that faces the second face and crosses the first face. The insulating member is provided to cover the first face, a portion of the second face, and a portion of the third face. The core and the insulating member are bonded to each other with the buffer member interposed therebetween.