Portable Wireless Power Charger Antenna Design
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Solution Overview
Problem
Existing wireless charging systems face portability issues and safety concerns due to the need for a substantially stationary transmit antenna and the collocation of AC power sources with user-interaction areas, limiting flexible placement and increasing safety risks.
Innovation Solution
The implementation of a wireless power transmission system using coupled resonant structures, including loop antennas and passive energy relays, that allow for flexible placement of the transmitter and efficient energy transfer through magnetic near-field coupling, reducing the need for physical conductors and minimizing radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a substantially stationary transmit antenna is used for wireless power transmission, then power transmission efficiency is improved, but device portability deteriorates
Solution Approach 1:
The patent applies the dynamics principle by making the transmit antenna portable and movable rather than stationary. The system allows the transmit antenna to be moved to different locations and orientations to optimize power transmission efficiency for each charging scenario, thereby achieving both good transmission efficiency and device portability.
2Ease of operation
If AC power source is collocated with user-interaction area about the transmit antenna, then power supply convenience is improved, but safety deteriorates
Solution Approach 1:
The patent applies segmentation by separating the AC power source from the user-interaction area. The system uses a portable transmit antenna that can be positioned away from users while still providing wireless power transmission to devices in the user area, thus maintaining power supply convenience while improving safety by reducing exposure to high-power electromagnetic fields in user zones.
3Adaptability or versatility
If transmit antenna is made portable for flexible placement, then adaptability is improved, but power transmission efficiency deteriorates
Solution Approach 1:
The system enables dynamic adjustment of the portable transmit antenna's position, orientation, and transmission parameters to optimize power transmission efficiency for each specific charging scenario. This dynamic optimization ensures that even with flexible portable placement, the system can achieve high transmission efficiency by adapting to the spatial relationship between the antenna and receiving devices.
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
Enables efficient and flexible wireless charging of devices over short to medium distances with high transfer efficiency, while ensuring safety by reducing magnetic field strength in user proximity and eliminating the need for additional wired power interfaces.
Implementation Method 1
Wireless energy transmission may be based on coupling between a transmit antenna, a receive antenna and a rectifying circuit embedded in the host electronic device to be powered or charged
Implementation Method 2
efficient energy transfer through magnetic near-field coupling
Data Source
AI summary
Exemplary embodiments are directed to wireless power transfer. A portable wireless power charger includes an antenna configured to generate a magnetic near-field for coupling of wireless power to a wireless powered device including a receiver. The antenna is substantially disposed around the perimeter of the charging pad. The portable wireless power charger further includes a feeder cable for coupling the input power to the charging pad.