Wireless Fast Charging Power Control with Receiver Status Feedback
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Solution Overview
Problem
Existing wireless power transfer systems lack efficient power control mechanisms during fast charging, leading to unstable power transmission without prior verification of the wireless power receiver's status.
Innovation Solution
A method where the wireless power receiver transmits a Configuration packet to the transmitter, enters a negotiation phase for authentication and power control, and sends a response message with DSR/NAK to adjust the power information packet based on the receiver's requirements, enabling the transmitter to adjust its voltage for stable fast charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless power transmitter performs power control directly without checking receiver status, then power transmission speed increases, but power transmission stability deteriorates
Solution Approach 1:
The wireless power transmitter performs preliminary verification of the receiver's status (voltage, current, temperature, charge level) before executing power control operations. This preliminary action ensures that power adjustments are made only when the receiver is in a suitable state, preventing unstable power transmission while maintaining efficient charging speeds.
Solution Approach 2:
The system implements a feedback mechanism where the receiver continuously reports its status (voltage, current, temperature, charge level) to the transmitter. The transmitter uses this feedback information to dynamically adjust power control decisions, ensuring stable power transmission while maintaining high charging efficiency. The feedback loop allows real-time optimization of power transmission based on actual receiver conditions.
2Reliability
If the wireless power transmitter verifies receiver status before power control, then power transmission stability improves, but charging time increases
Solution Approach 1:
The status verification is performed as a preliminary action during the negotiation phase before power transfer begins. By completing verification upfront and establishing a power control agreement, the system avoids repeated checking during charging, thus maintaining stability while minimizing time loss.
Solution Approach 2:
The system maintains continuous power transfer operations once the preliminary verification is complete. The feedback mechanism enables continuous monitoring and adjustment without interrupting the charging process, ensuring that the useful action of power transmission continues uninterrupted while maintaining stability through real-time adjustments.
3Productivity
If the wireless power transmitter uses detailed power control based on receiver status, then charging efficiency improves, but system complexity increases
Solution Approach 1:
The system controls power transmission by adjusting key parameters (voltage, current) based on receiver status. By focusing control on these critical parameters rather than managing all system components, the system achieves high charging efficiency while keeping the control mechanism relatively simple and manageable.
Solution Approach 2:
The wireless power transmitter is designed to perform multiple functions: power transmission, status verification, power control, and communication. By integrating these functions into a single system, the patent reduces overall system complexity while maintaining detailed power control capabilities for high charging efficiency.
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 stable power transmission by ensuring the wireless power transmitter checks the receiver's status before power control, allowing for efficient and stable wireless charging.
Implementation Method 1
The magnetic induction method corresponds to a method transmitting power by using electric currents that are induced to the coil of the receiver by a magnetic field, which is generated from a coil battery cell of the transmitter, in accordance with an electromagnetic coupling between a transmitting coil and a receiving coil.
Implementation Method 2
The magnetic induction method corresponds to a method transmitting power by using electric currents that are induced to the coil of the receiver by a magnetic field, which is generated from a coil battery cell of the transmitter, in accordance with an electromagnetic coupling between a transmitting coil and a receiving coil.
Implementation Method 3
The wireless power transfer technique includes diverse methods, such as a method of transferring power by using magnetic coupling, a method of transferring power by using radio frequency (RF), a method of transferring power by using microwaves, and a method of transferring power by using ultrasound (or ultrasonic waves).
Data Source
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AI summary
The present specification relates to a method for controlling power for fast charging in a wireless power transmission system, in which, in the transfer phase, a wireless power receiver receives a power information packet from a wireless power transmitter. The wireless power receiver transmits a response message to the power information packet to the wireless power transmitter. If the wireless power receiver does not satisfy a required value for power information of the wireless power transmitter, the response message includes DSR/NAK and the reason for DSR/NAK. Power is controlled on the basis of the reason for DSR/NAK.