Electrode Wireless Power Transmission with Conductive Shielding
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Solution Overview
Problem
Existing wireless power transmission systems face inefficiencies due to significant power loss in coils and interference from obstacles like magnetic bodies, which affect transmission characteristics.
Innovation Solution
A wireless power transmission system is designed with electrodes and inductors arranged to resonate at equal frequencies, housed in conductive casings to minimize electric field spread and interference, and configured to maintain efficient power transfer even with obstacles present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If electromagnetic induction is used for wireless power transmission, then power can be transmitted without contact, but power loss in the coil is large and transmission efficiency is low
Solution Approach 1:
The patent replaces the traditional coil-based electromagnetic induction system with an electrode-based capacitive coupling system. Instead of using magnetic fields generated by coils, the invention uses electric fields between electrodes to achieve wireless power transmission, thereby eliminating the large power losses associated with coil resistance and magnetic hysteresis.
Solution Approach 2:
The patent changes the fundamental transmission parameter from magnetic field coupling to electric field coupling. By using capacitive coupling between electrodes rather than inductive coupling through coils, the system achieves lower energy loss and higher transmission efficiency while maintaining wireless power transfer capability.
2Ease of operation
If coils are used for wireless power transmission, then power can be transmitted wirelessly, but obstacles such as magnetic bodies cause characteristic changes and reduce transmission efficiency
Solution Approach 1:
The patent substitutes the magnetic field-based coil system with an electric field-based electrode system. Since the invention uses capacitive coupling rather than inductive coupling, magnetic bodies no longer interfere with the power transmission characteristics, eliminating the harmful effects of magnetic interference while preserving wireless transmission functionality.
3Object-affected harmful factors
If electrodes are housed in conductive casing with opening, then electric field spread is minimized and obstacle influence is reduced, but device structure becomes more complex
Solution Approach 1:
The patent introduces a conductive casing with a specific opening configuration as an intermediary structure. The casing acts as a shield that controls electric field distribution and blocks interference from external obstacles, while the opening allows necessary electric field interaction. This intermediary structure protects the electrode system from harmful external influences.
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 system achieves stable and efficient power transmission with reduced impact from obstacles, maintaining high efficiency and resonance frequencies despite proximity to ground plates.
Implementation Method 1
a resonance frequency of a power transmission coupler constituted of the first and the second electrode and the first inductor and a resonance frequency of a power reception coupler constituted of the third and the fourth electrode and the second inductor are set to be substantially equal
Implementation Method 2
at least one of the first to the fourth electrode is housed in a conductive casing having an opening corresponding to an opposing electrode
Data Source
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AI summary
[OBJECT] There is provided a wireless power transmission system capable of transmitting power efficiently even when there is an obstacle or the like. [ORGANIZATION] A power transmission device has a first and a second electrode (111, 112), a first and a second connection line (115, 116), and a first inductor (113, 114). A power reception device has a third and a fourth electrode (121, 122), a third and a fourth connection line (125, 126), and a second inductor (123, 124). At least one of the first to the fourth electrode is housed in a conductive casing (310, 320) having an opening corresponding to an opposing electrode, and a resonance frequency of a power transmission coupler constituted of the first and the second electrode and the first inductor (113, 144) and a resonance frequency of a power reception coupler constituted of the third and the fourth electrode and the second inductor (123, 124) are set to be substantially equal.