In-Band Wireless Power Transceiver Tuning for High Data Rates
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Solution Overview
Problem
Achieving high in-band data rates in wireless power transfer systems is challenging due to transceiver characteristics such as high Q-factor and low self-resonant frequency, which can lead to ringing and oscillation of communication signals.
Innovation Solution
The system employs a transceiver with a bidirectional converter, current regulator, and controller to manage operating modes, including power reception and communication modes, using electronic tuning and noise cancellation to stabilize current flow and achieve higher data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If in-band communications are used for link management in wireless power transfer systems, then communication functions are integrated into the power transfer channel, but high data rates (>100kbps) are difficult to achieve due to transceiver characteristics
Solution Approach 1:
The transceiver dynamically tunes its resonant frequency to match the power transfer frequency, allowing the communication system to adapt to different operating conditions and achieve higher data rates within the in-band constraint
Solution Approach 2:
The system changes the operating parameters of the transceiver, specifically adjusting the resonant frequency and Q-factor through electronic tuning, to optimize communication performance while maintaining power transfer functionality
2Loss of energy
If transceiver operates with high Q-factor and low self-resonant frequency for power transfer, then power transfer efficiency is improved, but communication signal stability deteriorates due to ringing and oscillation
Solution Approach 1:
The system applies preliminary tuning to the transceiver resonant frequency before communication occurs, preventing ringing and oscillation from occurring in the first place by ensuring the transceiver is properly resonant with the power transfer channel
Solution Approach 2:
The system uses feedback mechanisms to monitor and adjust the transceiver operating parameters, detecting and correcting any signal instability that arises during power transfer and communication operations
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 allows for higher data rates during information exchange between devices, stabilizing current flow and reducing noise, thereby enhancing communication efficiency.
Implementation Method 1
The system employs a transceiver with a bidirectional converter, current regulator, and controller to manage operating modes, including power reception and communication modes, using electronic tuning and noise cancellation to stabilize current flow
Implementation Method 2
Wireless power transfer systems can apply in-band communications for link management purposes
Implementation Method 3
a current regulator configured to: flow load current to ground; and a controller configured to: ascertain, in response to processing the quantified amounts, an operating point for the system current, and cause, in response to the current regulator flowing the load current to ground, the current regulator to flow the load current by an amount that clamps the system current to the operating point
Data Source
Figure 1
Figure 2A~2B
Figure 3~4
AI summary
A transceiver including a voltage regulator, a current regulator and a controller. In response to the voltage regulator receives a supply voltage from an active load, the voltage regulator measures quantified amounts of system current during successive time periods. The system current is consumed by the active load. The current regulator flows load current to ground. The controller processes the quantified amounts to ascertains an operating point for the system current. In response to the current regulator flows the load current to ground, the controller causes the current regulator flows the load current by an amount that clamps the system current to the operating point.