Ultra-Narrow Power Inductor Structure for High Current PCB Mounting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power inductors face challenges in miniaturization, as reducing the width dimension to achieve a smaller footprint increases manufacturing costs and complexity, making it difficult to handle higher currents and powers effectively.
Innovation Solution
The design of an ultra-narrow surface mount power inductor with a preformed conductive coil winding that includes surface mount terminals and magnetic core pieces, where the coil winding is fabricated with a simpler U-shape and oriented thickness to reduce width while maintaining high current and power handling capabilities, using a modular construction for scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the width dimension of power inductor is reduced to achieve smaller footprint, then the component size is reduced, but the manufacturing cost and complexity increase
Solution Approach 1:
The patent reorients the coil winding thickness dimension to extend in the width direction rather than the height direction. This dimensional reassignment allows the inductor to achieve ultra-narrow width while maintaining adequate current handling capability through the reoriented thickness, thereby reducing footprint without proportionally increasing manufacturing complexity
Solution Approach 2:
The inductor is divided into separate modular components including magnetic core pieces and a preformed coil winding assembly. This segmentation allows the coil winding to be manufactured independently with optimized geometry (U-shape with coplanar legs) and then assembled with the core pieces, simplifying the overall manufacturing process while enabling reduced width dimensions
2Area of stationary object
If the width dimension of power inductor is reduced to achieve smaller footprint, then the component size is reduced, but the manufacturing cost increases
Solution Approach 1:
The coil winding is preformed into its final U-shape configuration with coplanar legs before assembly with the magnetic core. This preliminary formation of the coil geometry eliminates complex in-situ winding operations and reduces manufacturing steps, thereby lowering production costs while enabling the narrow width design
Solution Approach 2:
By reassigning the thickness dimension to extend in the width direction rather than height, the patent enables cost-effective manufacturing of narrow-width inductors using standard fabrication techniques, avoiding the need for expensive specialized processes that would be required for conventional narrow designs
3Area of stationary object
If the coil winding thickness is reoriented to extend in width direction, then the width dimension is reduced, but the current handling capability must be maintained
Solution Approach 1:
The patent reorients the coil winding thickness dimension from the height direction to the width direction. This dimensional swap allows the inductor to achieve reduced width footprint while the reoriented thickness provides sufficient cross-sectional area for current flow, maintaining current handling capability despite the narrower form factor
Solution Approach 2:
The combination of the preformed coil winding with specific thickness orientation and the magnetic core pieces creates a composite structure where the geometric arrangement of conductive and magnetic materials optimizes both the reduced width dimension and the current handling capability through enhanced magnetic coupling and 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
This design allows for a substantial reduction in the component's width dimension, reducing manufacturing costs and complexity while maintaining performance, enabling higher current and power handling with a smaller footprint, and is scalable for multi-phase applications.
Implementation Method 1
Power inductors are designed to induce magnetic fields via current flowing through one or more conductive windings, and store energy via the generation of magnetic fields in magnetic cores associated with the windings
Implementation Method 2
Power inductors store energy via the generation of magnetic fields in magnetic cores associated with the windings
Data Source
AI summary
An electromagnetic component assembly for a circuit board includes a magnetic core composed of first, second, and third magnetic core pieces, with the third piece positioned between the first and second. The assembly features a first coil winding received by the first and third core pieces, and a second coil winding received by the third and second core pieces. Each coil winding comprises a U-shaped section with top winding sections and pairs of winding legs. The winding legs are coplanar, perpendicular to the circuit board, and situated between the respective core pieces. The top winding sections are bent towards the third core piece, extending perpendicularly to the winding legs, and fitting into recessed portions of the third core piece.