Miniaturized Coil Component Layout for High-Frequency EMI Removal
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Solution Overview
Problem
Existing coil components struggle to effectively remove noise, particularly electromagnetic interference (EMI), as they are miniaturized and used in increasingly complex electronic devices.
Innovation Solution
The coil component design includes a body with a core, a molded portion, a cover portion, first and second receiving grooves, a wound coil, and a first noise removing portion. The wound coil is positioned between the molded portion and the cover portion, with both ends in the receiving grooves, and the noise removing portion is disposed between the coil and the molded portion to facilitate noise discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the coil component is miniaturized to reduce size, then the component size is reduced, but the noise removal capability deteriorates
Solution Approach 1:
The coil component is segmented into distinct functional zones: a wound coil region for inductance, a noise removing portion for EMI suppression, and receiving grooves for terminal connections. This segmentation allows each zone to optimize its function independently, enabling effective noise removal even in miniaturized configurations.
Solution Approach 2:
Different regions of the coil component are assigned different material properties and structural characteristics. The noise removing portion has specific structural features (such as exposed surfaces and spacing) optimized for EMI suppression, while the wound coil region maintains properties for low DC resistance and high capacity, allowing each local area to perform its designated function effectively.
2Volume of moving object
If the wound coil is positioned closer to the molded portion to reduce size, then the component size is reduced, but the noise removal efficiency deteriorates
Solution Approach 1:
The noise removing portion acts as an intermediary structure between the wound coil and the molded portion. It includes exposed surfaces that extend toward the first surface of the molded portion, creating an intermediate zone that effectively suppresses EMI while allowing the wound coil to be positioned close to the molded portion for miniaturization.
3Device complexity
If the coil component design is simplified to reduce complexity, then the manufacturing cost is reduced, but the noise removal capability deteriorates
Solution Approach 1:
The noise removing portion is merged with the wound coil structure, where the noise removing portion is disposed between the wound coil and the molded portion. This integration achieves effective EMI suppression without requiring completely separate noise removal devices, thereby controlling design complexity while maintaining noise removal capability.
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 enables efficient removal of noise, particularly at higher frequencies, while maintaining low DC resistance and high capacity, thereby improving the performance of electronic devices.
Implementation Method 1
a wound coil disposed between the molded portion and the cover portion, and wound around the core
Implementation Method 2
a first noise removing portion disposed between the wound coil and the other surface of the molded portion, in such a manner that one end of the first noise removing portion is exposed to the one surface of the molded portion
Data Source
AI summary
A coil component includes a body including a core, a molded portion having a first surface and a second surface opposing each other and a side surface connecting the first surface and the second surface, and a cover portion disposed on the molded portion, first and second receiving grooves disposed in the first surface of the molded portion to be spaced apart from each other and disposed outside of a region corresponding to the core, in the first surface of the molded portion, a wound coil disposed between the molded portion and the cover portion, and wound around the core, and a first noise removing portion disposed between the wound coil and the second surface of the molded portion.