Powder-Core Inductor Structure for Better Thermal Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inductors in power applications often suffer from inadequate thermal management, leading to overheating due to high-frequency and high-amperage currents, which can cause damage to the inductor and other circuit components.
Innovation Solution
An inductor design featuring a winding with a powdered magnetic core form-fit into its inner volume, manufactured using additive manufacturing, which allows for improved thermal characteristics and efficient heat transfer through planar surfaces that facilitate easy attachment of cooling components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional toroidal inductors are used with high-frequency and high-amperage currents, then the inductor can handle power applications, but the inductor overheats due to electrical resistance and core losses
Solution Approach 1:
The patent changes the geometric parameters of the inductor by introducing planar surfaces orthogonal to the winding axis, which fundamentally alters the thermal characteristics and enables efficient heat dissipation while maintaining power handling capability
Solution Approach 2:
The patent extracts the thermal management function from the traditional toroidal structure by adding dedicated planar surfaces that serve specifically for heat dissipation and cooling component attachment, separating the magnetic function from the thermal management function
2Device complexity
If insufficient cooling is provided, then the inductor structure remains simple, but the inductor overheats and damages components
Solution Approach 1:
The inductor structure provides its own thermal management capability through integrated planar surfaces that enable passive heat dissipation and facilitate attachment of cooling components, making the device self-sufficient for thermal control without requiring complex external cooling systems
3Temperature
If a powdered magnetic core is form-fit into the inner volume, then thermal characteristics improve, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the magnetic core and winding into a single integrated structure by form-fitting the powdered magnetic core into the inner volume defined by the winding, achieving improved thermal contact and simplified assembly while maintaining manufacturing feasibility through additive manufacturing and molding processes
4Temperature
If planar surfaces are added to facilitate cooling component attachment, then thermal management improves, but the inductor deviates from conventional toroidal shape
Solution Approach 1:
The patent applies local quality modification by adding planar surfaces at specific locations (orthogonal to the winding axis) while maintaining the overall toroidal shape of the magnetic core, enabling targeted thermal management without fundamentally changing the geometric configuration needed for magnetic performance
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 enhances thermal management by allowing efficient heat transfer from the magnetic core to the winding, reducing the risk of overheating and improving power density, while maintaining comparable electrical characteristics to conventional toroidal inductors.
Implementation Method 1
The design enhances thermal management by allowing efficient heat transfer from the magnetic core to the winding
Implementation Method 2
An inductor is a passive electrical component that stores energy in a magnetic field when an electric current flows through the component
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An inductor (100) is described. The inductor (100) includes a winding (110) and a magnetic core (120). The winding (110) has an axis (112), and a first planar surface (114) essentially orthogonal to the axis (112). The winding (110) defines an inner volume. The magnetic core (120) is form-fit into the inner volume. The core (120) includes a powdered magnetic material.