Wireless Power Resonator Near Field Controller Magnetic Field Direction
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in minimizing the influence of magnetic fields on peripheral devices, leading to inefficiencies and potential interference.
Innovation Solution
A wireless power transmission apparatus with a near field controller that includes High Impedance Surface (HIS) characteristics, side focusing units, rear surface focusing units, and a direction adjusting unit to control the direction of the magnetic field generated by the resonator, ensuring it is focused on the target device while minimizing impact on surrounding apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless power transmission is performed using a resonator, then power transmission efficiency is improved, but magnetic field interference with peripheral devices increases
Solution Approach 1:
The near field controller is divided into multiple independent units: side focusing units (first and second) and rear surface focusing units (third and fourth). Each unit independently controls the magnetic field in its specific spatial direction, allowing segmented control of the magnetic field distribution to reduce interference with peripheral devices while maintaining power transmission efficiency
Solution Approach 2:
Different regions of the near field controller have different functional characteristics tailored to their specific purposes. The side focusing units are optimized for lateral magnetic field control, while the rear surface focusing units are optimized for backward magnetic field control. This local optimization allows each unit to effectively manage magnetic field characteristics in its specific spatial zone, reducing overall interference
2Productivity
If the magnetic field direction is controlled to focus on the target device, then power transmission efficiency is improved, but the complexity of the control system increases
Solution Approach 1:
The near field controller is designed with movable capabilities, allowing it to dynamically adjust its position and orientation relative to the resonator based on the target device's location. This dynamic adaptability enables the system to maintain optimal magnetic field focusing without requiring complex static control mechanisms, as the controller physically repositions itself to achieve the desired field distribution
Solution Approach 2:
The near field controller autonomously adjusts the magnetic field distribution by utilizing the resonator's existing electromagnetic field characteristics. The controller passively shapes the magnetic field through its High Impedance Surface structure without requiring active control signals or complex feedback systems, allowing the system to self-regulate the magnetic field focus toward the target device
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 solution effectively reduces the influence on peripheral devices by precisely directing the magnetic field, maintaining resonance frequency and Q-factor stability, and enhancing power transmission efficiency.
Implementation Method 1
At least a portion of the near field controller may have a High Impedance Surface (HIS) characteristic
Implementation Method 2
a source unit including a power resonator to transmit wireless power to a target apparatus
Implementation Method 3
a source unit including a power resonator to transmit wireless power to a target apparatus
Data Source
AI summary
Provided is a wireless power transmission apparatus, including a source unit including a power resonator to transmit a wireless power to a target apparatus, and a near field controller to control a direction of a magnetic field of the power resonator.