Resonant Wireless Power Transfer for In-Motion Charging Coverage
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Solution Overview
Problem
Existing wireless charging systems are limited to small, defined areas and require strict alignment, making them unsuitable for powering mobile platforms in motion, such as vehicles, and provide punctuated and inefficient charging.
Innovation Solution
A wireless power transfer (WPT) system with self-resonant transmitting and receiving antennas that maintain high electromagnetic coupling and efficient power transfer over a large area and volume, allowing flexible positioning and multiple platforms to be powered simultaneously without alignment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional wireless charging pads are used to maintain efficient power transfer, then power transfer efficiency is improved, but the charging area is limited and strict alignment is required
Solution Approach 1:
The patent transitions from two-dimensional planar charging pads to three-dimensional resonant electromagnetic fields. By using resonant inductive coupling between transmitting and receiving coils, the system creates a volumetric charging space rather than a flat charging surface, allowing receivers to be charged at various positions and orientations within the resonant field volume.
Solution Approach 2:
The system changes the operating parameters by using resonant frequency matching between transmitting and receiving coils. This resonance condition allows the electromagnetic coupling to be maintained over larger distances and volumes compared to traditional non-resonant inductive charging, thereby expanding the effective charging area while maintaining efficiency.
2Loss of energy
If traditional wireless charging pads are used to maintain efficient power transfer, then power transfer efficiency is improved, but alignment requirements become strict
Solution Approach 1:
The patent employs resonant oscillation of electromagnetic fields between transmitting and receiving coils at matched frequencies. This resonance creates a robust coupling that is less sensitive to misalignment, similar to how resonant mechanical systems can maintain energy transfer despite positional variations, thereby reducing alignment requirements while maintaining efficiency.
3Area of stationary object
If multiple charging pads are used to cover large area, then charging coverage is improved, but charging becomes punctured and un-continuous
Solution Approach 1:
The patent merges multiple charging functions into a single resonant electromagnetic field system. Instead of using separate discrete charging pads that create gaps, the resonant field continuously permeates a volumetric space, providing uninterrupted power transfer to receivers moving through or positioned within the field.
Solution Approach 2:
The resonant electromagnetic coupling maintains continuous power transfer over extended periods and distances. The resonant oscillation sustains the electromagnetic field continuously, ensuring uninterrupted charging for mobile receivers, unlike discrete pads that create intermittent charging zones.
4Ease of manufacture
If traditional charging pads with fixed dimensions are used, then manufacturing is simplified, but the system cannot power mobile platforms in motion
Solution Approach 1:
The resonant wireless charging system provides universal compatibility with various mobile platforms (vehicles, robots, portable devices) by creating a volumetric charging field rather than requiring platform-specific fixed pads. The same transmitting system can charge different types of receivers as long as they have compatible resonant receiving coils, enhancing versatility while maintaining manufacturing simplicity.
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 provides continuous and efficient power transfer to mobile platforms regardless of their position, orientation, or alignment, covering a large area and volume, and supports multiple platforms without performance degradation.
Implementation Method 1
both the transmitting and the receiving antennas or coils are designed to have self-resonance in the same frequency
Implementation Method 2
maintaining high electromagnetic (EM) coupling and high power transfer efficiency
Implementation Method 3
at least one signal conductor configured to receive an electrical signal from said power signal source and further configured to be stretched along a path
Data Source
AI summary
The present invention provides a novel wireless power transfer (WPT) system configured to cover relatively large area and volume while maintaining continuance, constant, high coupling and efficient energy transfer between the transmitter and the receiver of an in-motion wireless powering and charging system.