Conical Coil Winding for Stronger Magnetic Fields With Less Heat
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Solution Overview
Problem
Existing coil structures for generating magnetic fields, such as in transcranial magnetic stimulation, face challenges with heat generation due to high current requirements, necessitating large cooling devices.
Innovation Solution
A coil structure with a conically wound conducting wire, where 40 to 100% of the wire is wound on a single conical surface with an angle between the generatrix and central axis of 48° to 60°, optimized for generating a magnetic field inside a human head or similar constrained spaces, allowing for a smaller current flow and reduced heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a coil is energized to generate a magnetic field, then the magnetic field strength increases, but heat generation increases requiring large cooling devices
Solution Approach 1:
The patent changes the geometric parameters of the coil by winding it on a conical surface with specific angle ranges (48° to 60° between generatrix and central axis). This parameter optimization enables the coil to generate stronger magnetic fields at lower current levels, thereby reducing heat generation while maintaining or improving magnetic field strength.
Solution Approach 2:
The patent employs a conical curvature for the coil winding instead of traditional planar or cylindrical configurations. The conducting wire is wound on a conical surface where the angle between the generatrix and central axis is optimized to 48°-60°, creating a three-dimensional curved structure that improves magnetic field efficiency and reduces current requirements.
2Power
If high current is used to generate strong magnetic field, then magnetic field strength increases, but device complexity increases due to large cooling requirements
Solution Approach 1:
By optimizing the coil's geometric parameters (conical angle of 48°-60°), the system achieves higher magnetic field strength at lower current levels. This parameter optimization directly reduces the thermal load, allowing for simpler and smaller cooling devices while maintaining effective magnetic field generation for TMS treatment.
3Power
If coil is wound on conical surface with optimized angle, then magnetic field efficiency increases, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies optimized parameter ranges (48° to 60° for the conical angle) rather than single precise values. This range-based specification balances manufacturing feasibility with performance optimization, allowing for practical fabrication while maintaining high magnetic field efficiency. The conical geometry provides a clear geometric reference for winding, facilitating reproducible manufacturing.
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 enhances the magnetic field strength inside the conical shape while minimizing the current required, thereby simplifying the cooling device and reducing heat generation.
Implementation Method 1
A coil structure in which a conducting wire is wound, wherein 40 to 100% of a total length thereof is wound on a single conical surface... the magnetic field generated inside the conical shape increases with respect to the current flowing through the coil
Data Source
AI summary
An object of the present invention is to provide a coil structure capable of increasing a magnetic field generated inside an object with respect to a current flowing through a coil. The coil structure of the present invention is a coil structure in which a conducting wire is wound, and 40 to 100% of its total length is wound on a single conical surface. Preferably, an angle between a generatrix and a central axis of the single conical surface is 48° to 60°.