Wireless Power Receiver Modulation for Distortion-Free Charging Communication
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Solution Overview
Problem
Existing contactless charging systems experience communication errors due to signal distortion when strong wireless power signals are transmitted, leading to potential fire risks and battery degradation.
Innovation Solution
A wireless power reception device that modulates the amplitude of wireless power signals based on their strength using a modulator comprising resistors and transistors, such as MOSFETs, to maintain smooth communication with the wireless power transmission device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the intensity of the wireless power signal transmitted from the wireless power transmitting apparatus is increased, then the power transmission efficiency is improved, but distortion occurs in the modulated signal which causes communication errors
Solution Approach 1:
The patent applies dynamics by making the modulation depth adjustable and variable. The modulation depth is dynamically adapted based on the intensity of the wireless power signal received from the transmitting apparatus. When the power signal intensity increases, the modulation depth is reduced to prevent signal distortion, and when the intensity decreases, the modulation depth is increased to maintain communication quality. This dynamic adjustment resolves the contradiction between power transmission efficiency and communication reliability.
Solution Approach 2:
The patent changes the modulation depth parameter in response to changes in wireless power signal intensity. By monitoring the received power level and adjusting the modulation depth accordingly, the system maintains optimal communication conditions across varying power transmission levels. This parameter adaptation allows the system to achieve both high power transmission efficiency and reliable communication without signal distortion.
2Reliability
If a contact type charging method is used, then the charging connection is established, but an instant discharge phenomenon occurs and fire may occur when foreign materials are accumulated
Solution Approach 1:
The patent uses magnetic coupling as an intermediary mechanism to transfer power without direct physical contact between the charger and battery terminals. The primary coil in the charger and secondary coil in the battery create a magnetic field that induces power transfer through electromagnetic induction, eliminating the need for exposed power supply terminals. This intermediary magnetic coupling approach resolves the fire risk and instant discharge issues associated with direct contact charging while maintaining reliable power transfer.
Solution Approach 2:
The patent replaces the mechanical contact-based charging system with a field-based electromagnetic induction system. Instead of relying on physical contact between power supply terminals and battery contacts, the system uses magnetic fields generated by coils to transfer energy wirelessly. This substitution of mechanical contact with electromagnetic field interaction eliminates the harmful effects of terminal exposure, foreign material accumulation, and instant discharge phenomena.
3Loss of information
If the amplitude of the wireless power signal is modulated for communication, then the communication function is achieved, but distortion occurs in the modulated signal when the power signal intensity is high
Solution Approach 1:
The patent implements dynamic adjustment of modulation depth based on the intensity level of the wireless power signal. The system continuously monitors the received power signal strength and adapts the modulation depth in real-time. At high power signal intensities, the modulation depth is reduced to prevent distortion and maintain signal accuracy. At lower intensities, the modulation depth is increased to ensure sufficient communication capability. This dynamic adaptation resolves the contradiction between achieving communication functionality and maintaining signal modulation accuracy.
Solution Approach 2:
The patent changes the modulation depth parameter according to the wireless power signal intensity to maintain optimal communication quality. By adjusting this key parameter dynamically, the system ensures that modulated signals remain accurate and undistorted across varying power transmission levels, thereby preventing information loss while maintaining manufacturing precision in signal modulation.
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
Prevents signal distortion and ensures stable communication even with strong wireless power signals, reducing fire risks and extending battery life.
Implementation Method 1
at least one secondary core for receiving a wireless power signal transmitted from a wireless power transmission device
Implementation Method 2
a modulator for modulating a strength of the wireless power signal according to the measured strength of the wireless power signal
Data Source
AI summary
A wireless power reception device and a wireless communication method thereby are provided. The wireless communication method by the wireless power reception device may comprise the steps of: receiving a wireless power signal from a wireless power transmission device; measuring the strength of the wireless power signal; modulating the amplitude of the wireless power signal according to the measured strength of the wireless power signal; and performing communication with the wireless power transmission device by using the signal having the amplitude modulated.