Inductor Array Layout With High-Permeability Coupling Isolation
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Solution Overview
Problem
Conventional inductor arrays with closely packed inductors experience increased magnetic coupling, which hinders their desired characteristics.
Innovation Solution
The inductor array incorporates a magnetic base body with high-permeability portions positioned between adjacent internal conductors to reduce magnetic coupling, utilizing a magnetic material with varying permeability to manage magnetic flux distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If inductors are arranged closer to each other to reduce installation space, then the installation space is reduced, but the magnetic coupling between inductors is increased
Solution Approach 1:
The magnetic base body is designed with non-uniform permeability distribution, where the first high-permeability portion is positioned specifically in the inter-conductor region between adjacent internal conductors. This local variation in magnetic properties allows the structure to guide magnetic flux away from adjacent inductors, reducing magnetic coupling while maintaining the compact arrangement for reduced installation space.
Solution Approach 2:
The first high-permeability portion acts as an intermediary element between adjacent internal conductors. By introducing this intermediate structure with higher permeability than the body portion, magnetic flux is attracted into and guided through the high-permeability portion, preventing direct coupling between adjacent inductors while allowing the inductors to remain closely spaced.
2Area of stationary object
If inductors are arranged closer to each other to reduce installation space, then the installation space is reduced, but the desired characteristics of inductors are compromised
Solution Approach 1:
The magnetic base body incorporates spatially varying permeability properties, with the first high-permeability portion strategically located in inter-conductor regions. This local quality variation creates favorable magnetic flux paths that isolate adjacent inductors, allowing them to maintain desired electrical characteristics even when closely spaced for reduced installation area.
3Device complexity
If a uniform magnetic base body is used, then the structure is simple, but magnetic coupling between adjacent inductors is increased
Solution Approach 1:
Rather than using a uniform magnetic base body, the invention introduces local variations in permeability by positioning the first high-permeability portion in specific inter-conductor regions. This targeted approach to modifying base body properties reduces magnetic coupling between adjacent inductors while maintaining overall structural simplicity and avoiding the need for completely complex multi-component designs.
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 configuration reduces magnetic coupling between inductors, maintaining desired characteristics and enabling high-density mounting in smaller spaces.
Implementation Method 1
The magnetic base body may include: a body portion having the plurality of internal conductors embedded therein; and a first high-permeability portion having a higher relative permeability than the body portion. The first high-permeability portion may occupy at least a part of an inter-conductor region between a first internal conductor and a second internal conductor among the plurality of internal conductors
Data Source
AI summary
An inductor array according to one or more embodiments of the invention includes: a plurality of internal conductors spaced apart from each other along a reference axis; a magnetic base body; a plurality of first external electrodes each connected to one end of associated one of the plurality of internal conductors; and a plurality of second external electrodes each connected to the other end of associated one of the plurality of internal conductors. The magnetic base body may include: a body portion having the plurality of internal conductors embedded therein; and a first high-permeability portion having a higher relative permeability than the body portion.