Flat Coil Resonators With Auto-Tuning for Misaligned Wireless Power
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Solution Overview
Problem
Conventional coupled resonator systems for wireless power transfer are limited to operation at a fixed distance and orientation, with efficiency dropping rapidly as the receiver moves away from the optimal point, and use bulky non-flat resonator structures.
Innovation Solution
A wireless power transfer system featuring a transmitter and receiver with substantially two-dimensional resonator structures and impedance-matching structures, capable of auto-tuning to maintain efficient power transfer by adjusting the transmit frequency in response to changes in range and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional coupled resonator systems are used, then power transfer efficiency is maintained at optimal position, but the system is limited to fixed distance and orientation with efficiency dropping rapidly when receiver moves away
Solution Approach 1:
The patent implements dynamic frequency tuning capability that allows the resonator system to automatically adjust its operating frequency in response to changes in distance and orientation between transmitter and receiver. This dynamic adaptation maintains strong coupling and high efficiency across varying conditions, resolving the contradiction between adaptability and efficiency stability.
Solution Approach 2:
The system changes the operating frequency parameter dynamically to optimize power transfer at different distances and orientations. By tuning the resonant frequency based on detected coupling conditions, the system maintains efficient operation across a range of positions rather than being locked to a fixed frequency optimal only at one specific configuration.
2Power
If conventional coupled resonator systems are used, then power transfer is achieved, but bulky non-flat resonator structures are required
Solution Approach 1:
The patent replaces traditional bulky three-dimensional resonator structures with planar two-dimensional resonator designs. This substitution maintains the essential electromagnetic resonance functionality while dramatically reducing the volume and physical bulk of the resonator structures, enabling flatter, more integrated wireless power transfer devices.
Solution Approach 2:
The invention transitions from three-dimensional resonator geometries to two-dimensional planar resonator structures. By confining the resonant electromagnetic fields to a planar configuration rather than requiring volumetric structures, the system achieves efficient power transfer with significantly reduced physical footprint and flattened form factor.
3Reliability
If precise alignment is required for efficient power transfer, then efficiency is maintained, but the system becomes difficult to operate and requires precise positioning
Solution Approach 1:
The patent incorporates feedback mechanisms that detect the coupling conditions between transmitter and receiver, then use this information to dynamically tune the operating frequency. This closed-loop control automatically compensates for misalignment and distance variations, maintaining high efficiency without requiring manual positioning or precise alignment from the user.
Solution Approach 2:
The resonator system performs self-adjustment through automatic frequency tuning based on detected coupling conditions. The system serves itself by detecting when it is operating at optimal coupling and autonomously adjusting its frequency to maintain this state, eliminating the need for external intervention or precise manual alignment.
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 nearly constant power transfer efficiency across a range of distances and orientations, extending the effective working range and maintaining high efficiency by automatically compensating for variations in coupling constants through frequency tuning.
Implementation Method 1
Coupled resonator wireless power transfer is capable of delivering power with more efficiency than far field approaches and at longer range than traditional inductive schemes
Implementation Method 2
A wireless power transfer system featuring a transmitter and receiver with substantially two-dimensional resonator structures and impedance-matching networks, allowing for auto-tuning of system parameters to compensate for variations in range and orientation
Data Source
AI summary
In accordance with various aspects of the disclosure, a method and apparatus is disclosed that includes feature of a transmitter and receiver having a substantially two-dimensional resonator structure including a flat coil; and an impedance-matching structure operably connected to the resonator structure, the transmitter configured to transmit power wirelessly.