Inductor Array Layout for Uniform Inductance Distribution
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Solution Overview
Problem
Conventional inductor arrays exhibit uneven magnetic flux distribution, leading to non-uniform inductance among inductors, particularly affecting the outermost inductors, which results in lower inductance values.
Innovation Solution
The inductor array design includes internal conductors with alternating first and second conductor portions, arranged to face different surfaces of the magnetic base body, with specific distances and orientations to ensure uniform magnetic permeability across various regions, thereby enhancing inductance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If internal conductors are arranged at regular intervals with the same orientation to achieve uniform characteristics, then the inductors have consistent structural parameters, but the magnetic flux distribution becomes uneven and outermost inductors exhibit lower inductance
Solution Approach 1:
The patent applies asymmetry by arranging internal conductors with different orientations relative to the base body surfaces. Specifically, odd-numbered internal conductors are arranged to face the first surface while even-numbered internal conductors face the second surface, creating an asymmetric pattern that compensates for magnetic flux leakage at outermost positions and achieves uniform inductance distribution across all inductors.
2Ease of operation
If the number of turns in the winding portion is not an integer to connect internal conductors to differently positioned external electrodes, then the external electrodes can be positioned circumferentially, but the magnetic fluxes are not distributed uniformly around the coil axis
Solution Approach 1:
The patent applies local quality by making the conductor portions have different lengths depending on their position. The first conductor portions connecting to first external electrodes have a first length, while the second conductor portions connecting to second external electrodes have a second length. This local variation in conductor dimensions compensates for the non-integer number of turns and achieves uniform magnetic flux distribution.
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 achieves uniform inductance among inductors, allowing for high current capacity and reduced magnetic saturation, enabling high energy density and efficient operation in electronic devices.
Implementation Method 1
Each internal conductor extends a circumferential direction centered on its own coil axis... the internal conductor generates more magnetic fluxes in part of the circumferential region surrounding its coil axis than in the remaining part
Implementation Method 2
a magnetic base body having a first surface, a second surface opposed to the first surface, and a third surface connecting between the first and second surfaces... ensure uniform magnetic permeability across various regions
Data Source
AI summary
An inductor array includes a magnetic base body having first and second surfaces opposed to each other and a third surface connecting between the first and second surfaces, and also includes first and second end internal conductors having the same shape. The first end internal conductor includes first-end first conductor portions and fewer first-end second conductor portions, alternating with and being connected to each other. The second end internal conductor includes second-end first conductor portions and fewer second-end second conductor portions, alternating with and being connected to each other. The first-end first conductor portions are positioned away from the first surface by a first end distance in a reference axis direction and face the first surface. The second-end second conductor portions are positioned away from the second surface by a second end distance less than the first end distance in the reference axis direction and face the second surface.