Wireless Power Source Circuitry with Nonlinear Gain Saturation
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in maintaining robust efficiency across varying operating conditions, such as changing transfer distances and orientations, making it difficult to power moving objects effectively.
Innovation Solution
The use of parity-time-symmetry based techniques with nonlinear gain saturation in source circuitry, which adjusts the operating frequency of the magnetic field to maintain efficient power transfer across a range of coupling effects, rates, and efficacies, utilizing a source resonator and gain circuitry that includes a voltage amplifier and resistor to self-adjust and provide optimal power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-radiative wireless power transfer using magnetic field coupling is employed, then wireless powering of implantable medical devices and stationary electric vehicles becomes feasible, but transfer efficiency becomes sensitive to variations in operating conditions such as transfer distance and orientation
Solution Approach 1:
The patent employs dynamic frequency tuning where the operating frequency of the magnetic field is continuously adjusted based on real-time coupling conditions. The source resonator and receiver resonator frequencies are adapted to match optimal values as transfer distance and orientation change, maintaining robust transfer efficiency across varying operating conditions
Solution Approach 2:
The system changes the frequency parameter of the magnetic field dynamically to optimize power transfer. By adjusting the operating frequency in response to coupling rate variations, the system maintains efficient power transfer across different transfer distances and orientations, resolving the sensitivity problem
2Reliability
If active frequency tuning is implemented to maintain optimal power transfer, then transfer efficiency remains high across varying conditions, but system complexity increases due to additional control mechanisms
Solution Approach 1:
The patent implements feedback mechanisms where the coupling rate between source and receiver is continuously monitored, and this information feeds back to adjust the operating frequency. The gain circuitry automatically adjusts gain based on coupling rate, creating a self-regulating system that maintains optimal transfer efficiency without complex external control
Solution Approach 2:
The system performs self-adjustment of operating frequency and gain based on intrinsic coupling conditions. The source resonator automatically tunes its frequency in response to coupling rate changes, eliminating the need for complex external frequency tuning control mechanisms while maintaining high transfer efficiency
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
This approach enables robust wireless power transfer with efficiency remaining within a threshold across a range of distances and orientations, supporting dynamic power delivery to moving devices or vehicles without the need for active frequency tuning.
Implementation Method 1
non-radiative transfer, which uses magnetic field coupling in the near field
Implementation Method 2
uses magnetic field coupling in the near field, usually with the help of circuit resonance
Implementation Method 3
nonlinear gain saturation in source circuitry, which adjusts the operating frequency of the magnetic field
Data Source
AI summary
Various embodiments are directed to apparatuses and methods related to source circuitry that provide power to other circuitry. The source circuitry including gain circuitry and a source resonator. The gain circuitry provide powers to the source resonator with a gain that is dependent on a coupling rate between the source circuitry and other circuitry. The source resonator is coupled to the gain circuitry and generates a magnetic field in response to the power. The source circuitry is configured and arranged to wirelessly transfer the power to the other circuitry via the magnetic field.