Wireless Energy Transfer Theft Suppression via Dynamic Frequency
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Solution Overview
Problem
Existing wireless energy transfer systems are vulnerable to energy theft, as the energy can be intercepted by unauthorized receivers without the need for physical connections, making it difficult to detect and prevent unauthorized energy transfer.
Innovation Solution
A wireless energy transfer device that includes a power transmission unit generating an oscillating magnetic or electric field, a receiving antenna for converting this field into electric power, and an electric power theft suppression unit. This unit changes the frequency of the oscillating field and adjusts the resonance frequency of the receiving antenna, making it difficult for unauthorized receivers to intercept the energy, and includes a communication unit to encrypt and transmit frequency information, a detection unit to monitor field status, and a notification/interruption system to alert and stop theft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless energy transfer is implemented without electrical wires, then energy transfer convenience is improved, but energy security deteriorates due to easy theft by unauthorized receivers
Solution Approach 1:
The patent applies dynamics by making the transmission frequency variable rather than fixed. The frequency changing unit dynamically adjusts the oscillation frequency of the magnetic field according to predetermined patterns, making it difficult for unauthorized receivers with fixed resonance frequencies to intercept energy effectively. This dynamic frequency adjustment maintains the wireless convenience while preventing theft.
Solution Approach 2:
The patent changes the parameter of transmission frequency dynamically. By varying the oscillation frequency of the magnetic field over time according to predetermined patterns, the system ensures that unauthorized receivers cannot efficiently capture energy at a fixed frequency, thus preventing theft while maintaining wireless energy transfer functionality.
2Reliability
If frequency changing is implemented to prevent theft, then energy security is improved, but device complexity increases due to frequency changing and resonance frequency adjustment units
Solution Approach 1:
The communication unit serves multiple functions: it communicates between transmission and reception devices, transmits frequency information, and coordinates frequency changes. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity while implementing frequency changing for security.
Solution Approach 2:
The system uses feedback through the communication unit to coordinate frequency changes between transmission and reception devices. The reception device receives frequency information from the transmission device and adjusts its resonance frequency accordingly, creating a coordinated feedback loop that enables security measures without requiring complex independent control systems at each end.
3Productivity
If resonance frequency adjustment is implemented at reception device, then energy transfer efficiency is maintained despite frequency changes, but device complexity increases
Solution Approach 1:
The resonance frequency changing unit at the reception device uses feedback from frequency information received via the communication unit to adjust its resonance frequency. This feedback mechanism enables the reception device to maintain efficient energy transfer by matching the transmission frequency without requiring complex independent frequency detection and adjustment systems.
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
Effectively suppresses energy theft by reducing the efficiency of unauthorized power reception and enabling easy detection of theft, ensuring secure and efficient energy transfer.
Implementation Method 1
a power transmission unit that generates an oscillating magnetic field or oscillating electric field
Implementation Method 2
a power reception unit, which is provided with a receiving antenna, and which converts the oscillating magnetic field or the oscillating electric field of the power transmission unit to electric power with the receiving antenna
Implementation Method 3
The mobile device contains at least one resonance circuit in the inductive coupling section. To detect the coupled mobile device, the controller of the battery charger periodically changes the oscillation frequency of the oscillator during a short test duration and monitors a resulting change in the oscillator operating current
Data Source
AI summary
A wireless energy transfer device (1) includes: a power transmission unit (2) that generates an oscillating magnetic field or oscillating electric field; a power reception unit (3), which is provided with a receiving antenna (31), and which converts the oscillating magnetic field or the oscillating electric field of the power transmission unit (2) to electric power by the receiving antenna (31); and an electric power theft suppression unit that suppresses the theft of energy with the oscillating magnetic field or the oscillating electric field of the power transmission unit (2).