Bit-Stuffed In-Band Signaling for Wireless Power Thermal Mitigation
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Solution Overview
Problem
Current wireless power and data transfer systems face limitations in thermal efficiency, with excessive heat generation and slow data rates, particularly in in-band communications, which can harm system performance and user experience.
Innovation Solution
Implementing software-based thermal mitigation methods that encode or re-encode data signals with more 'off' or 'low' pulses to reduce thermal losses, and utilizing buffered communications to simulate two-way data transfer over a single inductive connection, enabling faster data transfer without additional physical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If in-band communications are used for data transfer in wireless power systems, then data can be transmitted over the same channel, but data rates are limited to slow speeds (1-3 kilobytes per second)
Solution Approach 1:
The patent segments the communication approach by separating power transfer and data communication functions. It uses dedicated data communication channels (such as load modulation or capacitive coupling) alongside the inductive power transfer channel, allowing data to be transmitted independently from the power signal, thereby achieving higher data rates while maintaining power transfer efficiency
Solution Approach 2:
The patent implements multi-functionality by enabling the wireless power system to simultaneously perform power transfer and high-speed data communication through multiple mechanisms. The system can use load modulation for bidirectional communication, capacitive coupling for additional data channels, and other auxiliary communication paths, making the system versatile in handling both power and data needs
2Loss of energy
If continuous high-power transmission is used to improve power transfer efficiency, then more power reaches the receiver, but thermal losses and heat generation increase
Solution Approach 1:
The patent applies periodic action through pulsed power transmission and duty cycle modulation. Instead of continuous high-power transmission, the system uses periodic bursts of power transfer interspersed with lower-power or zero-power intervals. This allows the system to achieve necessary power transfer over time while reducing peak thermal loads and allowing cooling periods, thereby managing thermal losses effectively
Solution Approach 2:
The patent implements dynamic adjustment of transmission parameters including real-time modulation of power levels, frequency shifting, and adaptive duty cycle control. The system dynamically responds to thermal conditions, load requirements, and coupling efficiency variations, adjusting transmission characteristics to optimize power transfer while maintaining thermal management within safe operating limits
3Temperature
If software-based thermal mitigation is implemented by encoding more 'off' or 'low' pulses, then thermal losses are reduced, but power transfer efficiency may decrease
Solution Approach 1:
The patent implements feedback mechanisms where the receiver continuously monitors received power levels and thermal conditions, then communicates this information back to the transmitter. The transmitter uses this feedback to dynamically adjust the duty cycle, pulse width, and power levels of transmission bursts, optimizing the balance between thermal management and power transfer efficiency in real-time based on actual system conditions
Solution Approach 2:
The patent employs parameter changes by dynamically modifying transmission characteristics such as frequency, amplitude, duty cycle, and pulse timing based on thermal feedback and power transfer requirements. The system adjusts these parameters adaptively, using lower power levels during thermal management periods and higher levels when thermal constraints are relaxed, thereby maintaining overall efficiency while managing thermal losses
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 effectively reduces thermal losses and enhances system efficiency while allowing higher-speed data communications, compatible with legacy protocols, eliminating the need for wired connections and ensuring interoperability.
Implementation Method 1
Wireless connection systems are used in a variety of applications for the wireless transfer of electrical energy, electrical power, electromagnetic energy, electrical data signals... Such systems often use inductive wireless power transfer, which occurs when magnetic fields created by a transmitting element induce an electric field, and hence, an electric current, in a receiving element.
Implementation Method 2
an amplifier configured to receive the driving signal at a gate of the at least one transistor and invert a direct power input signal to generate the AC wireless signal at the operating frequency
Data Source
AI summary
A method for operating a wireless power transfer system is configured for utilizing software for the purposes of thermal mitigation, via re-encoding data in a bitstream for data communicated in-band of wireless power transfer. The data is encoded as binary messages. The method includes inserting one or more sets of non-data low pulses into the binary bit stream to generate a stuffed binary bit stream, each of the one or more sets of non-data low pulses inserted between a number of bits of the binary bit stream. Such inserting adds non-data low pulse time in the in-band data signal.