Resonant Frequency Tuning for Selective Wireless Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Non-contact power transmission devices using electromagnetic induction lack frequency selectivity, leading to unintentional power supply to multiple receivers located adjacent to a target receiver.
Innovation Solution
An electromagnetic resonance non-contact power transmission device with a transmitter having a mechanism to vary its resonant frequency and a plurality of receivers with specific resonant frequencies, allowing selective power transmission by matching the transmitter's frequency to the receiver's resonant frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic induction non-contact power transmission is used, then power transmission is achieved, but frequency selectivity is lost causing unintentional power supply to multiple receivers
Solution Approach 1:
The patent applies parameter changes by varying the resonant frequency of the transmitter resonance element to match the resonant frequency of the intended receiver. This frequency tuning enables selective power transmission to a specific receiver while preventing unintentional power supply to adjacent receivers, thereby resolving the contradiction between achieving power transmission and maintaining frequency selectivity.
Solution Approach 2:
The patent utilizes electromagnetic resonance, which involves oscillating electromagnetic fields at specific resonant frequencies. By exciting the transmitter and receiver resonance elements at matching frequencies, the system achieves efficient and selective power transfer to the intended receiver only, eliminating the harmful effect of powering multiple receivers simultaneously.
2Reliability
If resonance frequency matching is implemented for selective power transmission, then frequency selectivity is improved, but device complexity increases due to frequency variation mechanism
Solution Approach 1:
The patent implements dynamics by making the resonant frequency of the transmitter variable rather than fixed. The frequency variation mechanism allows the transmitter to dynamically adjust its resonant frequency to match different receivers, enabling selective power transmission. This dynamic adjustment resolves the contradiction by providing frequency selectivity while managing device complexity through controlled variability.
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 selective power transmission to specific receivers, increasing the distance and reducing alignment precision requirements between transmitter and receiver, while maintaining efficient energy transfer.
Implementation Method 1
electromagnetic resonance non-contact power transmission device
Implementation Method 2
a transmitter excitation element coupled to the transmitter resonance element by electromagnetic induction
Data Source
AI summary
An electromagnetic resonance non-contact power transmission device includes a transmitter including a transmitter resonance element having a mechanism for discretely or continuously varying a resonant frequency, a transmitter excitation element coupled to the transmitter resonance element by electromagnetic induction, and an alternating current source for applying an alternating current at the same frequency as the resonant frequency to the transmitter excitation element, and a plurality of receivers each including a receiver resonance element having a specific resonant frequency, a receiver excitation element coupled to the receiver resonance element by electromagnetic induction, and an output circuit for outputting an electric current induced by the receiver excitation element. Electric power is transmitted selectively from the transmitter to any of the receivers having different specific resonant frequencies by changing the resonant frequency of the transmitter.