Wireless Power Transfer Resonant Circuits with Frequency Modulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current power wireless transfer systems between devices do not enable simultaneous and bi-directional data transfer, limiting their efficiency and functionality, particularly in applications requiring real-time communication and charging.
Innovation Solution
The system employs resonant circuits in both devices tuned to the same frequency for power transfer, with a modulator in the source device and a demodulator in the receiving device to modulate and demodulate frequency signals for data transfer, allowing full-duplex communication without interference, using additional resonant circuits for separate data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If resonant circuits are used for wireless power transfer between two devices, then power transfer efficiency is improved, but data transfer capability deteriorates (no simultaneous data transfer)
Solution Approach 1:
The system segments the frequency spectrum into different bands: the resonant frequency fo is dedicated to power transfer, while other frequencies are allocated for data transmission. This frequency segmentation allows power and data to coexist without interference, resolving the contradiction between efficient power transfer and data transfer capability.
Solution Approach 2:
The resonant circuit system is enhanced with multi-functionality by adding modulator and demodulator components. The same resonant coupling infrastructure that enables efficient power transfer is extended to also support data communication through frequency modulation, allowing the system to perform both power transfer and data transfer functions simultaneously.
2Ease of operation
If wired connections are removed for wireless power transfer, then ease of operation is improved, but data transfer reliability deteriorates (no simultaneous data transfer)
Solution Approach 1:
Frequency modulation serves as an intermediary mechanism that bridges the gap between wireless power transfer and reliable data transfer. By encoding data in frequency variations of the power transfer signal, the system maintains the wireless convenience while achieving reliable data communication through the modulated carrier wave.
3Use of energy by moving object
If single-frequency resonant circuits are used for power transfer, then power transfer efficiency is improved, but communication efficiency deteriorates (data packet retransmission required)
Solution Approach 1:
The system transitions from a single-dimensional approach (using only the resonant frequency fo for power transfer) to a multi-dimensional approach by utilizing the frequency dimension. Different frequencies are employed for different purposes: fo for power transfer and other frequencies for data communication, eliminating interference and improving communication efficiency without sacrificing power 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
Enables simultaneous and bi-directional data transfer without the need for wired connections, improving communication efficiency by preventing data packet retransmission and ensuring continuous band availability, while maintaining effective power transfer.
Implementation Method 1
the magnetic field generated by a resonant inductive coupling between the two devices is exploited to wirelessly transfer power
Implementation Method 2
Both the resonant circuits of the devices are tuned to resonate at the same resonant frequency fo
Implementation Method 3
a modulator configured to modulate the frequency of said first signal for transferring data from said first device to said second device simultaneously with the transfer of power
Implementation Method 4
a demodulator configured to demodulate the received signal, corresponding to the first signal sent from said first device, to obtain the transmitted data
Data Source
AI summary
A system for the wireless transfer of power includes a first device connected to a power supply source and provided with a first resonant circuit at a first frequency, a second device comprising at least one battery, provided with a second resonant circuit at said first frequency, arranged at a distance smaller than the wavelength associated with said first frequency and not provided with wires for the electrical connection with said first device. The first device is adapted to transfer a first signal representing the power to be sent to the second device for charging said at least one battery and comprises means adapted to modulate the frequency of said first signal for transferring data from the first device to the second device simultaneously with the power transfer. The second device comprises means adapted to demodulate the received signal, corresponding to the first signal sent from the first device, to obtain the transmitted data.