Damping Circuit for Wireless Power Signal Control
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Solution Overview
Problem
Current high frequency wireless power transfer systems face challenges in achieving higher power levels (>300 mW) without degrading communications, as they often require additional antennas and circuitry that increase cost, complexity, and electromagnetic interference, and legacy hardware may be damaged by higher power levels.
Innovation Solution
Incorporating a damping circuit with a damping diode, capacitor, or resistor to control signal damping during transmission, allowing for faster data rates and enhanced data ranges while maintaining communication fidelity by reducing rise and fall times and preventing power efficiency loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional antennas and circuitry are used for simultaneous wireless power and data transfer, then communication capability is improved, but device complexity and electromagnetic interference increase
Solution Approach 1:
The patent combines wireless power transfer and data communication functions into a single antenna and circuit system. The same transmitting coil and circuitry used for power transfer at frequencies like 6.78 MHz or 13.56 MHz are also used for modulating and transmitting data signals, eliminating the need for separate communication antennas and reducing overall system complexity.
Solution Approach 2:
The transmitting coil and associated circuitry are designed to perform multiple functions: transferring power wirelessly and simultaneously communicating data through modulation. This multi-functional approach allows a single component to serve dual purposes, reducing the number of components needed and simplifying the overall device architecture.
2Adaptability or versatility
If additional antennas and circuitry are used for simultaneous wireless power and data transfer, then communication capability is improved, but electromagnetic interference worsens
Solution Approach 1:
By merging power transfer and data communication into a single channel using the same antenna and circuitry, the patent eliminates out-of-band interference that would occur between separate antennas. The data signals are modulated onto the power transfer carrier frequency, ensuring both functions operate in the same spectral band without causing cross-talk or electromagnetic interference.
3Power
If higher power levels are used in high frequency wireless power transfer, then power transfer capability is improved, but communication fidelity deteriorates
Solution Approach 1:
The patent employs dynamic modulation techniques where data signals are encoded by varying parameters of the power transfer signal itself. The modulation scheme allows the system to dynamically adjust between power transfer and data communication modes, maintaining communication fidelity even at elevated power levels by using the power signal's inherent variations to carry data information.
4Power
If higher power levels are used in high frequency wireless power transfer, then power transfer capability is improved, but hardware damage risk increases
Solution Approach 1:
The patent incorporates preliminary protective measures including damping circuits and controlled modulation schemes that prevent excessive power levels from damaging legacy hardware. The damping circuit is designed to absorb or dissipate excess energy before it can reach sensitive components, and the modulation technique ensures that data transmission does not interfere with safe power transfer 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
Enables efficient high frequency wireless power transfer at elevated power levels while maintaining data communication integrity, reducing power loss and electromagnetic interference, and avoiding damage to legacy hardware.
Implementation Method 1
a damping circuit, which is configured for damping an AC wireless signal during transmission of the AC wireless signal and associated data signals
Implementation Method 2
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
Data Source
AI summary
A method for operating a wireless power transmission system includes providing a driving signal for driving a transmission antenna of the wireless power transmission system, the driving signal based, at least, on an operating frequency for the wireless power transmission system. The method further includes receiving, at a damping transistor of a damping circuit, damping signals for switching the damping transistor to one of an active mode and an inactive mode to control signal damping during transmission or receipt of wireless data signals. The method further includes selectively damping, by the damping circuit, the AC wireless signals, during transmission of the wireless data signals if the damping signals set the damping circuit to the active mode.