Composite Inductor Assembly for Low-Inductance Return Paths
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Solution Overview
Problem
Conventional inductors and power supply circuits face inefficiencies in power conversion and density, particularly in the context of clean energy systems, where raw energy needs to be converted efficiently to power devices while minimizing environmental impact.
Innovation Solution
The implementation of an inductor assembly comprising a first non-magnetically permeable material with a low magnetic permeability enveloped by a second magnetically permeable material, where electrically conductive paths extend through both materials, with the second material having higher permeability, allowing for optimized inductance and reduced parasitic inductance in the return path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional inductors use magnetically permeable material for the entire structure, then inductance is increased, but parasitic inductance in the return path increases causing energy loss
Solution Approach 1:
The patent applies local quality by using magnetically permeable material only in specific regions where inductance is needed (around the forward current path), while using non-magnetically permeable material in the return path region to minimize parasitic inductance. This localized material selection optimizes each region's magnetic properties according to its functional requirements.
Solution Approach 2:
The inductor structure is segmented into distinct regions with different material properties: a forward path region with high magnetic permeability material for maximum inductance, and a return path region with low magnetic permeability material for minimum parasitic inductance. This segmentation allows independent optimization of each path's magnetic characteristics.
2Quantity of substance
If power supply density is increased, then more energy can be stored in smaller space, but manufacturing complexity and precision requirements increase
Solution Approach 1:
The patent merges multiple inductors into a single integrated inductor assembly where multiple electrically conductive paths are formed within one component structure. This consolidation achieves high energy storage density while simplifying manufacturing by reducing the number of discrete components and their associated alignment requirements.
Solution Approach 2:
The inductor uses composite material construction combining magnetically permeable material and non-magnetically permeable material in a single assembly. This composite approach enables optimized magnetic properties for high density energy storage while maintaining manufacturability through a unified structure rather than multiple precision-aligned components.
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 enhances power conversion efficiency and density by minimizing the inductance of the return path, reducing energy loss, and improving load transient response in power distribution networks.
Implementation Method 1
second material, the second material being magnetically permeable material
Implementation Method 2
a controller can be configured to control switching of input current through one or more inductors to an output node of a power converter
Data Source
AI summary
According to one configuration, an inductor assembly comprises: a first material, second material, and one or more electrically conductive paths. A first electrically conductive path extends through the first material. In one example, the first material is not magnetically permeable material or has a low magnetic permeability. The second electrically conductive path extends through the second material. In one example, the second material is magnetically permeable material and has a higher magnetic permeability than the first material. The inductor assembly as discussed herein can be implemented in a circuit in which the second electrically conductive path supports current in one direction while the first electrically conductive path 10 (such as a return path) can be configured to support current in a second direction opposite the first direction.