Wireless Power Feeding System with Dynamic Frequency Control
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Solution Overview
Problem
Existing wireless power feeding systems face challenges in specifying and managing power receivers, controlling power transmission efficiently, and minimizing waste, particularly in contactless systems where it is difficult to determine the resonant frequency and position of the receiver.
Innovation Solution
A wireless power feeding system that detects the resonant frequency of a power receiver using identification information and adjusts the frequency of the power signal for optimal transmission efficiency, allowing for precise power management and reduced waste by determining the optimal transmission frequency based on the receiver's position and resonant frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a contactless power feeding system is used, then power can be supplied wirelessly to moving devices, but it becomes difficult to specify and manage the power receiving device and control the power transmission
Solution Approach 1:
The system employs feedback mechanisms where the power receiving device transmits resonance detection signals back to the power feeding device. The power feeding device receives these signals, determines the resonant frequency, and adjusts its transmission accordingly. This bidirectional communication enables the system to manage and control wireless power transmission effectively despite the contactless nature.
Solution Approach 2:
The patent introduces an intermediary communication protocol using electromagnetic signals for identification and resonance detection. This intermediary mechanism allows the power feeding device to identify the power receiving device and establish optimal transmission parameters without physical contact, resolving the management difficulty in contactless systems.
2Ease of operation
If the frequency of the power signal is fixed, then the system is simple to operate, but the power transmission efficiency varies with distance and resonant frequency mismatch
Solution Approach 1:
The system dynamically adjusts the transmission frequency based on the detected resonant frequency of the power receiving device. Instead of using a fixed frequency, the power feeding device modulates its transmission frequency to match the receiver's resonance, maximizing power transfer efficiency while maintaining operational simplicity through automated frequency locking.
Solution Approach 2:
The patent changes the frequency parameter of the power signal dynamically. By detecting the resonant frequency of the receiving device and adjusting the transmission frequency accordingly, the system optimizes energy transfer efficiency without requiring complex manual intervention, thus resolving the contradiction between operational simplicity and transmission efficiency.
3Loss of energy
If power is transmitted at maximum efficiency for a fixed distance, then energy waste is minimized, but the system cannot adapt to varying distances between transmitter and receiver
Solution Approach 1:
The system dynamically adapts to varying distances by continuously detecting the resonant frequency of the power receiving device. As distance changes affect the resonant characteristics, the power feeding device adjusts its transmission frequency in real-time to maintain maximum efficiency regardless of the separation distance between transmitter and receiver.
Solution Approach 2:
Before power transmission begins, the system performs preliminary resonance detection to determine the optimal transmission frequency for the current distance and configuration. This preliminary action ensures that power is transmitted at maximum efficiency from the outset, adapting to the specific distance between devices without energy waste.
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
This approach enables efficient and convenient power transmission to power receivers, reducing waste and improving the overall power feeding service for both users and providers by ensuring power is delivered at the highest efficiency.
Implementation Method 1
A power feeding device detects a resonant frequency which is specific to a power receiver and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information on the resonant frequency
Implementation Method 2
One example of wireless power feeding is a power feeding method using an antenna
Data Source
AI summary
An object is to provide a power feeding system and a power feeding method which are more convenient for a power feeding user at the power receiving end. An object is to provide a power feeding system and a power feeding method which also allow a power feeding provider (a company) which feeds power (at the power transmitting end) to supply power without waste. A power feeding device which wirelessly supplies power to a power receiver detects the position and the resonant frequency of the power receiver to be supplied with power, and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information. An efficient power feeding service can be offered by transmitting a power signal to the power receiver at an optimum frequency for high power transmission efficiency.