Wireless Power Supply Using Code-Matched Resonance
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Solution Overview
Problem
Existing wireless power supply technologies lack the ability to selectively supply electric power to specific users or devices, making it difficult to prevent power theft and ensure secure energy distribution.
Innovation Solution
A wireless power supply system that uses frequency- or phase-modulated electric, magnetic, or electromagnetic fields, with a resonance circuit and control unit to match impedance based on a transmission-side code, allowing only valid receivers to achieve resonance and efficiently receive power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless power supply is made available to the general public, then power supply coverage and accessibility are improved, but security against power theft and unauthorized usage deteriorates
Solution Approach 1:
The patent applies local quality by giving each power reception apparatus a unique identification code and making the resonance condition specific to each authorized device. The transmission apparatus transmits power at a frequency that matches only the resonance frequency of authorized receivers, creating localized and selective power transfer. This ensures that while power supply is widely accessible, only specific authorized devices can actually receive power, thus maintaining security.
Solution Approach 2:
The patent implements feedback mechanisms where the transmission apparatus monitors the resonance condition and adjusts transmission parameters accordingly. The system detects whether a reception apparatus is properly authorized through code verification and resonance matching before allowing power transfer. This feedback loop ensures that unauthorized devices cannot steal power while authorized devices receive power reliably.
2Reliability
If resonance condition is made variable for selective power supply, then power supply security is improved, but device complexity increases
Solution Approach 1:
The patent changes the resonance frequency parameter dynamically based on the identification code of the authorized reception apparatus. By varying the transmission frequency to match the specific resonance frequency of each authorized device, the system achieves selective power supply. The impedance control unit adjusts circuit parameters to maintain resonance at the variable frequency, enabling secure selective power transfer without excessively complex hardware.
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 and secure power delivery to authorized devices by ensuring that only valid receivers can resonate with the transmitted signal, thereby preventing unintended power supply and enhancing security and usage control.
Implementation Method 1
Wireless power supply transmission can be classified into three principal methods using an electromagnetic induction, an electromagnetic wave, and an electric field/magnetic field resonance
Implementation Method 2
a resonance capacitor that, together with the reception coil, forms a resonance circuit; and a control unit configured to change the impedance of the resonance circuit based upon a reception-side code such that resonance occurs between the resonance circuit and the electric power signal
Data Source
AI summary
A wireless power supply apparatus generates an electric signal frequency-modulated or otherwise phase-modulated according to a transmission-side code that is determined beforehand with a wireless power reception apparatus. The electric signal thus generated is transmitted via a transmission coil so as to generate an electric power signal including any one of an electric field, a magnetic field, and an electromagnetic field. The wireless power reception apparatus receives the electric power signal using a reception coil. A control unit changes the impedance of a resonance circuit that comprises the reception coil and a resonance capacitor, according to a reception-side code that is to correspond to the transmission-side code.