Wireless Power Transfer System with Dynamic Frequency Tuning
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Solution Overview
Problem
Existing wireless power transfer systems are limited by the requirement for resonator frequencies in the transmitter and receiver to be the same or within a narrow band, restricting efficiency and flexibility in power transfer over varying distances and loads.
Innovation Solution
A wireless power/data transfer system that includes a Power Transmitting Data Unit (PTDU) and a Power Receiving Data Unit (PRDU), where the PTDU emits electromagnetic waves with a driving frequency independent of its resonant frequency, allowing for adaptive power transfer based on environment variables and device profiles, and includes a repeater unit for extended range and foreign object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If resonator frequencies in transmitter and receiver are matched to the same or narrow band, then efficient power transfer is achieved, but system flexibility and adaptability to varying distances and loads deteriorate
Solution Approach 1:
The patent implements dynamic frequency adjustment where the transmitter resonator frequency is continuously adapted based on real-time coupling conditions and receiver feedback. The system transitions from static frequency matching to dynamic frequency tuning, allowing the transmitter to optimize its operating frequency according to varying distances, loads, and environmental conditions, thereby maintaining both efficiency and flexibility
Solution Approach 2:
The system changes the resonator frequency parameter dynamically rather than maintaining a fixed frequency. By adjusting the resonator frequency as a variable parameter based on coupling coefficient measurements and power transfer efficiency feedback, the system can adapt to different operating conditions while maintaining optimal power transfer, resolving the contradiction between efficiency and adaptability
2Adaptability or versatility
If wireless power transfer operates over varying distances and loads, then system versatility improves, but power transfer efficiency deteriorates due to frequency mismatch
Solution Approach 1:
The patent implements a feedback mechanism where the receiver measures power transfer efficiency and coupling conditions, then communicates this information back to the transmitter. The transmitter uses this feedback to adjust its resonator frequency and driving parameters in real-time, creating a closed-loop control system that maintains optimal efficiency across varying distances and loads
Solution Approach 2:
The system performs preliminary measurements of coupling conditions and environmental variables before initiating full power transfer. This preliminary action allows the system to pre-adjust resonator frequencies and optimize parameters, ensuring efficient power transfer is established before the actual power delivery begins, even under varying distance and load conditions
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 high efficiency and scalability by tailoring power transfer to device characteristics and environmental conditions, with enhanced tolerance for resonator frequency variations, load changes, and distance variations, while detecting and mitigating foreign objects for safe operation.
Implementation Method 1
a first resonator emitting electromagnetic waves
Implementation Method 2
at least one power receiving data unit (PRDU), connected to the remote device, receiving electromagnetic waves and converting the electromagnetic waves to the electrical power
Data Source
AI summary
A system for providing electrical power to a remote device through wireless transmission and the system comprises a power transmitting data unit (PTDU) receiving electrical power from a power source and at least one power receiving data unit (PRDU), connected to the remote device, receiving electromagnetic waves and converting the electromagnetic waves to the electrical power. The PTDU further comprises a controller, a first resonator emitting electromagnetic waves, and a DC/AC converter receiving electrical power from a remote power source and providing a driving voltage at a driving frequency to the first resonator, the driving frequency being independent from a resonant frequency of the first resonator, and the controller monitors environment variables related to the emitting of electromagnetic waves.