Wireless Power Transmitter Detection Using Variable Beacon Cycles
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Solution Overview
Problem
Current wireless charging technologies lack standardization for detecting wireless power receivers, selecting communication frequencies, adjusting power, and distributing communication time, leading to inefficiencies and potential power wastage.
Innovation Solution
A method for detecting wireless power receivers involves a wireless power transmitter using a beacon cycle with varying detection powers to efficiently identify and communicate with receivers, including a first detection power for driving and second detection powers for detection, optimizing power usage and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single detection power level is used for all wireless power receivers, then the detection process is simple, but receivers with different power consumption characteristics cannot be properly detected
Solution Approach 1:
The patent applies parameter changes by implementing multiple detection power levels (first detection power and second detection power) instead of a single fixed level. The wireless power transmitter adjusts the detection power parameter based on whether a receiver is detected, switching between higher and lower power levels to adapt to different receiver characteristics and power consumption profiles.
Solution Approach 2:
The detection process transitions from a static single-power-level approach to a dynamic multi-level approach. The system dynamically adjusts detection power based on detection results, creating an adaptive detection mechanism that responds to receiver presence and characteristics in real-time.
2Reliability
If high detection power is continuously applied, then receiver detection is reliable, but power is wasted when no receiver is present
Solution Approach 1:
The patent implements periodic action by applying detection power in cycles rather than continuously. The system alternates between periods of higher detection power (when no receiver is detected) and lower detection power (when a receiver is detected), creating a periodic pattern that reduces overall energy consumption while maintaining detection reliability.
Solution Approach 2:
The system performs preliminary detection using a first detection power level to identify receiver presence before committing to continuous high-power detection. This preliminary action allows the system to avoid sustained high power consumption when no receiver is present, reducing energy waste while maintaining reliable detection capability.
3Loss of energy
If detection power is reduced to save energy, then power consumption decreases, but detection efficiency and reliability deteriorate
Solution Approach 1:
The system dynamically adjusts detection power based on detection state, transitioning between low-power and high-power modes. When no receiver is detected, lower power is used to conserve energy; when a receiver is detected, power is increased to ensure reliable communication and charging, optimizing the balance between energy consumption and detection accuracy.
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 approach enhances the detection efficiency of wireless power receivers, reduces power wastage, and improves the overall reliability of wireless charging by adapting power levels based on receiver characteristics.
Implementation Method 1
The electromagnetic induction method transfers power between primary and secondary coils. Specifically, moving a magnet through a coil produces an induced current from which a magnetic field is produced at a transmission end, and the change in the magnetic field at a receiving end induces a current to generate energy therein.
Implementation Method 2
The resonance method uses a resonance-based power transmission principle based on the Coupled Mode Theory, i.e., a physical concept that a tuning fork being placed next to a wine glass causes the wine glass to ring with the same frequency. However, in resonance-based power transmission, resonated electromagnetic waves carry electric energy, instead of resonating sound.
Data Source
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AI summary
A method and apparatus for transmitting charging power to a wireless power receiver. The method includes detecting the wireless power receiver by applying different detection powers with different power levels; applying a driving power to drive the detected wireless power receiver; receiving a request signal for communication from the detected wireless power receiver using the driving power; determining whether or not to subscribe the detected wireless power receiver to a wireless power network; transmitting, to the detected wireless power receiver, a response signal to the request signal for communication, the response signal indicating whether or not the detected wireless power receiver is subscribed to the wireless power network; and transmitting charging power to the detected wireless power receiver, when the detected wireless power receiver is subscribed to the wireless power network.