Open-Core Wireless Power Resonator for Lower EM Emissions
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in reducing far-field electromagnetic (EM) emissions and improving thermal management of the power transfer system, particularly in ventricular assist devices, such as the wireless power transfer system, which are typically used to reduce EM emissions and improve cooling of the power transfer system.
Innovation Solution
The system incorporates a magnetic core with a coil element positioned within the annular groove and a coil element positioned within the central aperture, the coil element positioned within the central aperture, the coil element, and at least one layer comprising a non-magnetic, non-metallic material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional closed magnetic core is used in the transmit resonator, then the magnetic field confinement is improved, but far-field electromagnetic emissions increase and thermal management deteriorates
Solution Approach 1:
The patent extracts the central portion of the magnetic core to create a core aperture, removing the material that causes far-field EM emissions while maintaining the magnetic field confinement function through the remaining annular core structure. This extraction resolves the contradiction by eliminating the source of harmful emissions without compromising thermal management.
Solution Approach 2:
The magnetic core is segmented into an annular structure with a central aperture rather than a solid closed core. This segmentation allows the magnetic field to be confined to the annular region while reducing far-field emissions from the central area, simultaneously addressing both EM emission reduction and thermal management requirements.
2Stability of the object's composition
If a closed magnetic core is used, then magnetic field confinement is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
By extracting the central portion of the magnetic core to create an aperture, the design simplifies the overall structure while maintaining effective magnetic field confinement in the annular region. This reduces manufacturing complexity compared to designing and assembling multiple components to achieve the same confinement effect.
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 efficacy of the system is achieved by reducing far-field electromagnetic (EM) emissions and improving thermal management of the power transfer system, particularly in ventricular assist devices, such as the wireless power transfer system, which are typically used to reduce EM emissions and improve cooling of the power transfer system.
Implementation Method 1
a coil element positioned within the annular groove
Implementation Method 2
a magnetic core positioned within the housing, the magnetic core defining an annular groove and a central aperture
Implementation Method 3
at least one layer positioned within the central aperture, the at least one layer comprising a non-magnetic, non-metallic material
Implementation Method 4
Systems and methods for wireless power resonators with open core
Data Source
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AI summary
Resonators for use in a transcutaneous energy transfer system (TETS) are provided. A resonator includes a housing, a magnetic core positioned within the housing, the magnetic core defining an annular groove and a central aperture, a coil element positioned within the annular groove, and at least one layer positioned within the central aperture, the at least one layer comprising a non-magnetic, non-metallic material.