Double-D Magnetic Stimulation Coil With Segmented Winding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional magnetic stimulation coils face challenges in generating a strong induced electrical field over a wide range while maintaining low inductance, leading to inefficiencies and increased costs due to the need for higher electrical currents, which can result in coil heating issues and require larger boost circuits and capacitors.
Innovation Solution
A Double-D coil design with 1st to Nth turns arranged in a specific configuration, where actuation parts flow current in one direction and connection parts in the opposite direction, supported by a spherical surface contact section, optimizing the number of turns and inner diameter width to achieve a strong induced electrical field with reduced inductance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional magnetic stimulation coils are designed to generate a wide induced electrical field, then the stimulation coverage area is improved, but the inductance increases leading to higher current requirements and coil heating
Solution Approach 1:
The coil is divided into multiple independent winding sections (first winding section, second winding section, third winding section, fourth winding section) arranged in a specific pattern. Each section contributes to the overall magnetic field while the segmented structure allows for better current distribution and reduced inductance, enabling wide area stimulation without excessive current requirements that would cause heating.
Solution Approach 2:
The coil employs an asymmetric Double-D configuration where the winding sections are arranged with different orientations and positions rather than a symmetric pattern. This asymmetric layout optimizes the magnetic field distribution to achieve wide coverage area while controlling the inductance value, preventing the need for high currents that would lead to coil heating.
2Power
If the coil is designed to generate a strong induced electrical field, then the stimulation intensity is improved, but the inductance increases requiring larger boost circuits and capacitors
Solution Approach 1:
By segmenting the coil into multiple winding sections with specific current directions, the overall inductance is reduced while maintaining the ability to generate strong magnetic fields. The segmented structure allows for more efficient energy utilization, reducing the requirements for large boost circuits and capacitors.
Solution Approach 2:
The coil design changes key parameters including the arrangement pattern of winding sections, the direction of current flow in different sections, and the geometric configuration. These parameter changes optimize the inductance-to-field-strength ratio, enabling strong stimulation intensity with lower inductance values that do not require oversized power supply components.
3Measurement precision
If the coil uses a figure 8 configuration to focus stimulation locally, then the positioning precision is improved, but the stimulation coverage area is reduced
Solution Approach 1:
The coil is segmented into multiple winding sections arranged in a Double-D pattern rather than a traditional figure 8 configuration. This segmentation allows the magnetic field to be distributed across a wider area while maintaining focused stimulation capability through controlled current directions in each section, achieving both wide coverage and adequate positioning precision.
Solution Approach 2:
The coil transitions from a two-dimensional figure 8 pattern to a three-dimensional Double-D configuration with winding sections arranged in multiple planes and orientations. This dimensional change enables the magnetic field to spread over a larger cortical area while maintaining the ability to target specific regions through selective activation of different winding sections.
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 Double-D coil achieves a high efficiency in generating a wide induced electrical field with minimal inductance, reducing unpleasantness during treatment and allowing for effective stimulation over a larger area with lower current requirements, thus addressing the inefficiencies of existing designs.
Implementation Method 1
by applying an alternating current or a given current waveform to a stimulation coil that has been placed above a person's scalp, a variable magnetic field is generated, and the effect of that variable magnetic field is to induce, within the brain, eddy current
Implementation Method 2
A coil which is arranged close to a surface of an object for generating an induced electrical field within the object
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The present invention provides a coil that can achieve a wide induced electrical field and that has high generation efficiency of the induced electrical field, and moreover can restrict inductance to a small value. A coil 31 has 1st to Nth turns 311 to 31N. The 1st to Nth turns 311 to 31N are respectively provided with actuation parts 311a for current in one direction to flow, and connection parts 311b for current in the opposite direction to the one direction to flow. The plurality of actuation parts 311a are arranged substantially parallel to each other, and are arranged along a surface of an object 1 or a surface that approximates to the surface of the object 1. A plurality of connection parts 311b are arranged within a space in which the connection parts do not face the surface of the object 1 over the actuation parts 311a of the 1st to Nth turns, and the connection parts are positioned at the sides with respect to the extension direction of the actuation parts 311a.