Wireless Power Transmitter Feedback Control for Efficiency
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Solution Overview
Problem
Conventional wireless power transmitters only perform control based on transmission efficiency detection and do not actively intervene in power control to enhance efficiency, relying solely on power consumption requests without actively managing transmission efficiency.
Innovation Solution
A wireless power transmitter and receiver system that includes an inverter, coil, and control circuitry to adjust power states based on accurate transmission efficiency calculations, with the transmitter outputting AC power at a specified frequency and the receiver converting AC power to DC for battery charging while adjusting power states to optimize reception efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the wireless power transmitter only performs detection-based control without active power control, then the device complexity is reduced, but the transmission efficiency deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the wireless power receiver calculates transmission efficiency based on received power and transmits this information back to the transmitter. The transmitter then uses this feedback to actively adjust its power output, creating a closed-loop control system that optimizes transmission efficiency while maintaining manageable complexity through standardized communication protocols.
Solution Approach 2:
The wireless power receiver performs self-service by autonomously calculating transmission efficiency and providing this information to the transmitter. This shifts the computational burden of efficiency calculation to the receiver side, allowing the transmitter to focus on power delivery while the receiver manages efficiency monitoring and adjustment recommendations.
2Ease of operation
If the wireless power transmitter relies solely on power consumption requests without active intervention, then the ease of operation is improved, but the transmission efficiency deteriorates
Solution Approach 1:
The system maintains ease of operation by allowing initial power requests from the receiver, but enhances efficiency through continuous feedback loops where the transmitter monitors actual transmission efficiency and actively adjusts power delivery accordingly, combining simple operation with intelligent optimization.
Solution Approach 2:
The patent introduces dynamic power adjustment capabilities where the transmitter can modify power output in real-time based on efficiency calculations, transitioning from static request-based control to dynamic efficiency-optimized control while maintaining user-friendly operation through automated adjustments.
3Device complexity
If the wireless power system does not actively manage transmission efficiency, then the device complexity is reduced, but the temperature control deteriorates leading to overheating risks
Solution Approach 1:
The patent implements feedback-based temperature management where transmission efficiency data is used to infer power loss and potential heating issues. The system actively adjusts power delivery based on efficiency metrics, preventing overheating by reducing power transmission when efficiency drops indicate potential thermal problems, without requiring direct temperature sensing in the transmission path.
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 system effectively enhances transmission and reception efficiency by actively adjusting power states in response to calculated efficiency, preventing overheating and improving charging performance.
Implementation Method 1
an inverter configured to output alternating current (AC) power using direct current (DC) power
Implementation Method 2
a coil configured to receive the AC power, and transmit the AC power to an external electronic device using the coil
Implementation Method 3
a conversion circuitry configured to convert the AC power received via the coil into DC power
Data Source
AI summary
A wireless power transmitter is provided. The wireless power transmitter includes an inverter configured to output alternating current (AC) power using direct current (DC) power, a coil configured to receive the AC power, and a control circuitry, wherein the control circuitry is configured to identify an input associated with transmitting the AC power, output the AC power at a specified frequency determined according to the input, using the inverter, transmit the AC power to an external electronic device using the coil, and, while at least partially transmitting the AC power to the external electronic device, transmit information associated with an amount of the DC power input to the inverter to output the AC power to the external electronic device, such that the external electronic device identifies transmission efficiency of the AC power using the information associated with the amount of DC power.