Wireless Power Transfer Resonator Impedance Control
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Solution Overview
Problem
Existing power supplies struggle to handle unpredictable power sources with wide voltage swings and surges, particularly in wireless energy transfer systems, leading to component failure and unreliable output power for electronic devices.
Innovation Solution
The implementation of asynchronous rectifiers with a feedback loop and a shorting element that can bypass the rectifying element, allowing for dynamic voltage regulation and zero voltage switching, along with resonator coils and tunable elements to optimize wireless energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing power supplies are used with wireless power sources, then power can be transferred wirelessly to electronic devices, but voltage fluctuations and surges cause component failure and unreliable output power
Solution Approach 1:
The patent implements a feedback control system that continuously monitors the output voltage of the rectifier and dynamically adjusts the switching state of the bypass path. The controller compares the rectified voltage with a reference voltage and activates the bypass path when voltage exceeds acceptable thresholds, thereby stabilizing the output power and preventing component failure due to voltage fluctuations and surges from wireless power sources.
Solution Approach 2:
The patent introduces a bypass path with a shorting element as an intermediary component between the rectifying element and the electronic device. This bypass path acts as a protective mediator that can short-circuit excessive voltage before it reaches the electronic device, preventing voltage fluctuations and surges from causing component failure while allowing normal power transfer to continue.
2Reliability
If a bypass path with shorting element is added to regulate voltage, then voltage stability improves, but device complexity increases
Solution Approach 1:
The patent implements a dynamic bypass path controlled by a switching element that can transition between conducting and non-conducting states based on real-time voltage conditions. This dynamic control allows the system to maintain voltage stability by activating the bypass path only when needed, rather than having it permanently engaged, thereby managing device complexity through intelligent control rather than purely passive circuit design.
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 solution provides a stable and efficient power supply to electronic devices by regulating voltage and current, even in the presence of wide voltage fluctuations, ensuring reliable operation and improved energy transfer efficiency.
Implementation Method 1
Wireless energy transfer systems for surfaces... highly resonant wireless power source... oscillating energy signal
Implementation Method 2
a feedback loop configured to detect an electrical parameter at an output of the rectifying element and to generate, based on the detected electrical parameter, a control signal for the at least one shorting element
Data Source
AI summary
The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.