Wireless Power Coupling Structure to Prevent Eddy Current Heating
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Solution Overview
Problem
Conventional wireless power apparatuses for substrate treating apparatuses experience reduced power transmission efficiency due to heat generation caused by eddy currents in metal screws used in the coupling elements, which are heated by induced magnetic fields, especially as driving frequencies increase.
Innovation Solution
The apparatus employs an outer housing with coupling parts made of resin or ceramic materials that prevent eddy current generation, using a combination of screw-coupling and bonding methods to secure components, and includes a drift preventing body made of ferrite to concentrate magnetic fields, ensuring efficient power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal screws are used in coupling elements around the outer housing, then the coupling elements can be easily manufactured and assembled, but eddy currents are generated by the induced magnetic field causing heat generation and reduced power transmission efficiency
Solution Approach 1:
The patent changes the material parameter of the coupling element from metal to resin, fundamentally altering the electrical conductivity properties. This prevents eddy current generation by the induced magnetic field, eliminating heat generation and improving power transmission efficiency while maintaining ease of manufacture through molding processes
Solution Approach 2:
The patent converts the harmful effect of the induced magnetic field (which causes eddy currents in metal) into a beneficial situation by using resin material that is transparent to the magnetic field. The magnetic field passes through the resin without generating eddy currents, thus preventing energy loss and heat generation
2Productivity
If the driving frequency is increased to improve wireless power efficiency, then the power transmission efficiency improves, but the screw temperature of metal materials increases causing further reduction in power transmission efficiency
Solution Approach 1:
The patent changes the material parameter from metal to resin, which fundamentally alters the response to increasing driving frequency. Resin materials do not generate eddy currents regardless of frequency, so increasing the driving frequency to improve wireless power efficiency does not cause temperature increase in the coupling elements
3Loss of energy
If resin or ceramic materials are used for coupling parts to prevent eddy currents, then power transmission efficiency is maintained, but the coupling method becomes more complex requiring combination of screw-coupling and bonding
Solution Approach 1:
The patent merges two coupling methods (screw-coupling and bonding) into a unified coupling system. The resin coupling part is first screw-coupled to the outer housing for positioning and mechanical strength, then bonded to the inner housing for secure fixation, creating a comprehensive coupling solution that maintains efficiency while managing the complexity through systematic integration
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 effectively prevents heat generation and maintains power transmission efficiency by eliminating eddy currents, allowing for a simple and versatile design within limited space without increasing design complexity or costs.
Implementation Method 1
an outer housing having a main power line forming an induced magnetic field by receiving a power... and an inner housing positioned spaced apart from the outer housing, generating an electromotive force through the induced magnetic field generated from the outer housing
Implementation Method 2
the coupling part is formed of a material at which an eddy current is not generated by the induced magnetic field... effectively prevents heat generation and maintains power transmission efficiency by eliminating eddy currents
Implementation Method 3
a drift preventing body made of ferrite to concentrate magnetic fields
Data Source
AI summary
Embodiments of the inventive concept provide a wireless power apparatus for a substrate treating apparatus and a manufacturing method for the wireless power apparatus for the substrate treating apparatus for preventing a heat generation by preventing a generation of an eddy current in a coupling element, if the coupling element is used around an outer housing at which an induced magnetic field is formed. The inventive concept provides a wireless power apparatus for a substrate treating apparatus. The wireless power apparatus includes an outer housing having a main power line forming an induced magnetic field by receiving a power, and a coupling part coupling at least two components among components which are positioned at a periphery of the main power line for fixing the main power line; and an inner housing positioned spaced apart from the outer housing, generating an electromotive force through the induced magnetic field generated from the outer housing, and supplying the electromotive force which is generated to the substrate treating apparatus, and wherein the coupling part is formed of a material at which an eddy current is not generated by the induced magnetic field.