Wireless Power Receiver Impedance Detection Without Dummy Load
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Solution Overview
Problem
Existing wireless charging systems for electronic devices require a dummy load to detect impedance changes, which consumes power and generates heat, and do not efficiently utilize this energy for charging.
Innovation Solution
An electronic device with a power receiver, power storage, and a controller that wirelessly receives detection power, delivers it to storage, and generates a limitation signal to manage impedance changes, allowing for the removal of the dummy load and efficient energy utilization during charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dummy load is used to detect impedance changes during wireless charging, then the wireless power transmission device can detect the electronic device, but the dummy load consumes power and generates heat
Solution Approach 1:
The patent removes the dummy load component from the system. Instead of using a separate dummy load to simulate impedance changes, the electronic device itself generates the impedance variation by controlling its power receiver and communication unit. This extraction of the dummy load eliminates the power consumption and heat generation issues while maintaining the detection function.
Solution Approach 2:
The power receiver and communication unit serve multiple functions: they not only perform their primary roles of receiving power and communicating, but also generate the impedance changes needed for detection. This multi-functionality eliminates the need for dedicated detection components like the dummy load, reducing overall power consumption.
2Reliability
If a dummy load is used to detect impedance changes, then the wireless power transmission device can detect the electronic device, but heat is generated in the electronic device
Solution Approach 1:
The dummy load is completely removed from the system architecture. The detection function is achieved through the inherent impedance characteristics of the power receiver and communication unit, which naturally vary during operation. This eliminates the heat generation source while preserving detection capability.
Solution Approach 2:
The patent converts the natural operational variations of the power receiver and communication unit (which would normally be incidental effects) into the primary mechanism for generating detectable impedance changes. By utilizing the inherent operational characteristics of these components, the system achieves detection without requiring additional power-dissipating elements.
3Reliability
If a dummy load is added to the system for impedance detection, then detection function is achieved, but device complexity increases
Solution Approach 1:
The power receiver and communication unit are designed to serve multiple purposes: their primary functions plus the additional function of generating impedance variations for detection. This consolidation of functions into existing components eliminates the need for separate detection hardware, thereby reducing system complexity.
Solution Approach 2:
The detection function is merged with the operational characteristics of the power receiver and communication unit. Rather than being a separate component, the impedance variation mechanism is integrated into the normal operation of these existing components, simplifying the overall system architecture.
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 enables efficient energy consumption and storage during wireless charging, reducing heat generation and improving charging efficiency by eliminating the need for a dummy load.
Implementation Method 1
a power receiver configured to wirelessly receive power
Data Source
AI summary
An electronic device and an operation method thereof according to various example embodiments wirelessly receive detection power for detecting the electronic device, and put a limitation on storing the power.