Wireless Power Receiver Resonance Coupling Management
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Solution Overview
Problem
Current wireless power transmission systems face inefficiencies in power transmission, high costs, and size constraints due to the use of DC-DC converters, which also lead to power loss and potential overvoltage issues in the load.
Innovation Solution
A wireless power receiver system that employs a power managing unit instead of a DC-DC converter, utilizing resonance-coupled coils and a power managing unit with a voltage restricting unit, controller, and modulation unit to adjust and manage power transmission efficiently, detect load state, and prevent overvoltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a DC-DC converter is used in the wireless power receiver, then power conversion can be achieved, but power transmission efficiency decreases and system size increases
Solution Approach 1:
The patent removes the DC-DC converter from the wireless power receiver system and replaces it with a power managing unit that directly manages power from the resonance-coupled coils. This extraction of the unnecessary component eliminates the efficiency losses and size increase associated with DC-DC conversion while maintaining power management functionality through direct resonance coupling.
Solution Approach 2:
The patent changes the operating parameters by using resonance-coupled coils operating at resonant frequency instead of traditional electromagnetic induction at non-resonant frequencies. This parameter change enables efficient power transfer without requiring DC-DC conversion, thereby improving power transmission efficiency and reducing system size.
2Length of stationary object
If resonance-coupled coils are used for wireless power transmission, then power transmission distance can be extended, but power transmission efficiency may decrease
Solution Approach 1:
The patent applies preliminary action by tuning the resonance frequency of both transmitting and receiving coils before power transmission begins. This pre-tuning ensures optimal resonant coupling conditions are established, maximizing power transmission efficiency even at extended transmission distances. The system prepares the resonant state in advance to maintain efficiency across distance variations.
Solution Approach 2:
The patent implements feedback mechanisms where the power managing unit continuously monitors power reception status and transmits this information back to the transmitting end. This feedback enables real-time adjustment of transmission parameters to maintain optimal efficiency despite changes in transmission distance, ensuring efficient power transfer across varying distances.
3Power
If power transmission is increased to meet load demands, then load power supply is improved, but overvoltage risk increases
Solution Approach 1:
The patent employs feedback control where the power managing unit detects the actual power reception status and communicates this information to the transmitting end. Based on this feedback, the system dynamically adjusts the transmitted power level to match actual load demands, ensuring adequate power supply while preventing overvoltage conditions through continuous monitoring and adjustment.
Solution Approach 2:
The patent introduces dynamic power management where the power transmission level is not fixed but continuously adjusted based on real-time load conditions. The power managing unit dynamically controls the resonance coupling and power transfer rate, enabling the system to adapt power supply levels to actual needs and prevent overvoltage while meeting load demands.
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 solution enhances power transmission efficiency, reduces system size and cost, minimizes power loss, and effectively protects the load from overvoltage by dynamically adjusting power supply based on detected load conditions.
Implementation Method 1
an energy transmitting scheme employing resonance has been widely used
Implementation Method 2
a wireless power transmission or a wireless energy transfer refers to a technology of wirelessly transferring electric energy to desired devices
Data Source
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AI summary
Disclosed are a wireless power receiver and a method of managing the same. The wireless power receiver to wirelessly receive power from a wireless power transmitter and transmit the power to a load includes a receiving unit to receive AC power from the wireless power transmitter that receives power from a power supply device, a rectifying unit to rectify the received AC power to DC power, and a power managing unit to manage the power transmitted to the load based on the rectified DC power.