Wireless Charging Coil Control for Misalignment Heat Reduction
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Solution Overview
Problem
Existing wireless charging systems face efficiency issues and heat generation due to misalignment of wireless power receiving devices, which can reduce charging speed and convenience.
Innovation Solution
An electronic device with a coil, inverter, power providing circuit, communication circuit, and control circuit that detects misalignment by identifying values in control error packets received from the wireless power receiving device and adjusts the driving voltage to optimize power transfer and reduce heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic device limits the charging area to facilitate alignment of the wireless power receiving device, then misalignment is prevented, but use convenience deteriorates
Solution Approach 1:
The system dynamically adjusts the driving voltage applied to the transmission coil based on real-time power transfer efficiency monitoring. When misalignment is detected (indicated by control error packets from the receiving device), the controller automatically reduces the driving voltage to prevent excessive heat generation, while still maintaining charging functionality across a larger area without requiring strict alignment constraints.
2Loss of energy
If the wireless power receiving device is misaligned on the electronic device, then power transfer efficiency drastically decreases, but heat generation increases
Solution Approach 1:
The system continuously monitors power transfer efficiency by receiving control error packets from the wireless power receiving device. Based on this feedback, the controller dynamically adjusts the driving voltage applied to the transmission coil. When misalignment is detected (indicated by specific error values in the packets), the system reduces voltage to prevent excessive heat generation while maintaining stable charging operation.
Solution Approach 2:
The controller changes the operating parameters by adjusting the driving voltage level based on the detected misalignment condition. By reducing the driving voltage when misalignment occurs, the system prevents the exponential increase in heat generation that would otherwise occur, while still maintaining sufficient power transfer for charging.
3Power
If the electronic device applies voltage to the input terminal of the inverter to enable power transfer, then power is transferred to the wireless power receiving device, but misalignment causes heat generation
Solution Approach 1:
The system dynamically adjusts the driving voltage applied to the inverter input terminal based on real-time monitoring of power transfer efficiency. When misalignment is detected through control error packets from the receiving device, the controller automatically reduces the voltage level, preventing excessive heat generation while maintaining continuous power transfer capability for charging operation.
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 enhances the convenience of wireless charging by maintaining efficient power transfer and reducing heat generation due to misalignment, thereby ensuring faster and more reliable charging.
Implementation Method 1
The wireless power transfer technology is a scheme for transferring power using the electromagnetic field induced around the coil and may supply electrical energy by generating an electromagnetic field by applying current to the transmission coil
Implementation Method 2
forming an induced current through the reception coil by the generated electromagnetic field
Data Source
AI summary
According to various embodiments, there may be provided an electronic device comprising a coil, an inverter configured to provide power to the coil, a power providing circuit, a communication circuit, and a control circuit, wherein the control circuit is configured to control the power providing circuit to apply a first voltage to an input terminal of the inverter, the inverter outputting a first magnitude of power based on the application of the first voltage, control the power providing circuit to apply a second voltage lower than the first voltage to the input terminal of the inverter, based on the application of the first voltage being maintained for a specific time, identify, through the communication circuit, a first control error packet from the wireless power receiving device, while applying the second voltage, and identify a first value included in the first control error packet.