Wireless Power Apparatus Using Direct Excitation Resonance
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Solution Overview
Problem
Existing wireless power transmission systems, particularly those using electromagnetic induction, face efficiency issues at longer distances and pose safety risks due to heating and interference with living tissues, limiting their application in various environments and use cases.
Innovation Solution
A device utilizing pulse-width modulated sources and excitation signal generators connected in parallel with transistors and choke coils, along with LC members, to achieve efficient wireless energy transfer without the need for a fixed connection, ensuring high efficiency and safety across distances and environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electromagnetic induction is used for wireless power transmission, then power can be transmitted without physical connection, but efficiency decreases significantly with distance and causes heating of living tissues
Solution Approach 1:
The patent changes the fundamental operating parameters from electromagnetic induction to direct excitation resonance. By operating at resonant frequencies and using direct excitation instead of induction, the system achieves high transmission efficiency over distance without the exponential efficiency loss characteristic of electromagnetic induction systems.
Solution Approach 2:
The patent replaces the electromagnetic induction mechanism with a direct excitation resonance mechanism. This substitution fundamentally changes how energy is transferred, using resonant coupling between transmitter and receiver coils rather than electromagnetic induction, thereby eliminating the heating issue while maintaining wireless operation.
2Ease of operation
If electromagnetic induction is used for wireless power transmission, then wireless charging is achieved, but living tissues are heated and safety risks occur
Solution Approach 1:
The patent substitutes electromagnetic induction with direct excitation resonance. This replacement eliminates the harmful heating effect on living tissues while preserving the wireless charging function, as direct excitation at resonant frequencies does not produce the same thermal effects as electromagnetic induction.
Solution Approach 2:
The patent converts the potential harmful effect of electromagnetic radiation into a beneficial resonant coupling effect. By operating at specific resonant frequencies, the system achieves efficient energy transfer without the harmful heating effects, turning what could be a harmful electromagnetic interaction into a controlled resonant phenomenon.
3Reliability
If direct connection is used for power supply, then simplicity and reliability are achieved, but mobility and independence from cable connection are limited
Solution Approach 1:
The patent replaces the mechanical cable connection with a wireless direct excitation resonance system. This substitution provides both the reliability of a direct connection (through resonant coupling) and the mobility/independence of wireless operation, eliminating the need for physical connectors while maintaining connection stability.
4Adaptability or versatility
If wireless power transmission systems are used, then mobility is improved, but efficiency at longer distances deteriorates
Solution Approach 1:
The patent changes the transmission mechanism from electromagnetic induction to direct excitation resonance. This parameter change enables efficient power transmission over longer distances by using resonant coupling, which maintains high efficiency regardless of distance, unlike electromagnetic induction systems where efficiency drops exponentially with distance.
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 solution provides high-efficiency wireless charging and power supply with increased distance capabilities, safety from living tissues, and reduced heating, enabling applications in diverse environments such as healthcare, military, and industrial settings without the need for cables or connectors.
Implementation Method 1
device for transmitting energy by direct excitation resonance by means of a pair of LC members
Implementation Method 2
transmitting the energy that is needed not only to transmit the information, but also to power the receiver
Implementation Method 3
The second group includes a transmitter and receiver system, where the receiver does not have any energy source of its own. This means that the transmitter transmits the energy
Implementation Method 4
a pulse-width modulated source and an excitation signal generator are connected in parallel between the power source and the power part of the device
Data Source
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AI summary
A device, in particular for wireless power supply and charging, the essence of which consists in the fact that a modulated source (1) and a generator (2) of excitation signals are connected in parallel between the power source (46) and the power part of the device, which together excite the power part of the device, wherein the first and second working coils (10, 11) are connected in parallel with the first and second transistors (9, 12). The power part consists of at least one pair of the first transistor (5) or the second transistor (6) and the first choke coil (7) or the second choke coil (8), wherein the excitation signal generator (2) operates with a mark-to-space ratio ranging from 50 up to 53%.