Wireless Power Transmitter with Mechanically Adjustable Antenna Array
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Solution Overview
Problem
Wireless power transmission systems using electromagnetic methods face inefficiencies when charging devices outside a specific coverage area of the power transmission antenna array, resulting in low power reception efficiency beyond a 30-degree angle from the central line.
Innovation Solution
A wireless power transmitter with a power transmission antenna array that can mechanically adjust its steering direction based on the location of the electronic device, using a processor to determine the device's direction and control the driving circuit to align the antenna array for optimal power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beamforming is performed with a fixed power transmission antenna array, then charging efficiency is improved within the coverage area (±30 degrees), but charging efficiency deteriorates outside the coverage area
Solution Approach 1:
The patent applies the dynamics principle by making the power transmission antenna array mechanically adjustable. The antenna array can change its steering direction dynamically based on the location of the electronic device, allowing the system to maintain high charging efficiency across a wider area rather than being fixed in one orientation
Solution Approach 2:
The patent implements feedback by using a processor to determine the direction in which the electronic device is located, then using this information to control the driving circuit to adjust the antenna array's steering direction accordingly. This closed-loop control ensures the antenna array always points toward the device for optimal power transmission
2Productivity
If the power transmission antenna array is mechanically adjusted to track the electronic device, then charging efficiency is improved for devices outside the initial coverage area, but device complexity increases
Solution Approach 1:
The patent applies universality by integrating multiple functions into the wireless power transmission system: the processor performs both direction determination and control functions, the driving circuit handles both positioning and steering adjustment, and the antenna array serves both transmission and tracking functions. This multi-functionality reduces the need for separate dedicated components
Solution Approach 2:
The system implements self-service through automatic tracking where the processor continuously monitors the electronic device's direction and automatically adjusts the antenna array's steering direction without user intervention. The system serves itself by autonomously maintaining optimal alignment for power transmission
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
Enhances charging efficiency by ensuring high power transmission to devices located outside the initial coverage area, improving the range and effectiveness of wireless charging.
Implementation Method 1
Wireless power transmission includes magnetic induction type, magnetic resonance type, and electromagnetic type. The electromagnetic type is more advantageous in long-distance power transmission
Implementation Method 2
A wireless power transmitter according to an electromagnetic scheme may perform beamforming of RF waves in a power transmission antenna array having a plurality of patch antennas
Data Source
AI summary
A wireless power transmitter according to various embodiments comprises: a power transmission antenna array capable of transmitting power in a wireless manner; a driving circuit for mechanically adjusting the steering direction of the power transmission antenna array; and a processor, wherein the processor can be configured so as to determine the direction in which an electronic device is positioned, control the driving circuit such that the driving circuit mechanically adjusts the steering direction of the power transmission antenna array when the direction in which the electronic device is positioned is not included in a coverage corresponding to the steering direction of the power transmission antenna array, and control the power transmission antenna array such that the power transmission antenna array transmits the power to the electronic device.