Dual Wireless Power Transmitter Isolation for Cross-Talk Mitigation
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies and interference issues when trying to simultaneously power multiple receivers, as additional antennas and circuitry required for data communication can lead to increased costs, harmonic distortion, and cross-talk between transmitters and receivers.
Innovation Solution
A dual wireless power transfer system with independent transmitter antennas and drivers, where data feedback from receivers is used to adjust the power input, and a low voltage drop-out isolates power supply to each transmitter system, reducing interference and maintaining efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional antennas and circuitry are used for data communication in wireless power transfer systems, then data communication capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines wireless power transfer and data communication functions into a single antenna system. The same antenna used for power transfer also handles data communication by detecting load modulation on the power signal, eliminating the need for separate communication antennas and circuitry.
Solution Approach 2:
The antenna system is designed to perform multiple functions: it serves as both a power transfer antenna and a data communication receiver. The system can simultaneously or alternately perform power transfer and detect communication signals on the same antenna, making the antenna universal for both purposes.
2Adaptability or versatility
If additional antennas and circuitry are used for data communication, then data communication capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges power transfer and data communication hardware into a single antenna system, reducing the bill of materials. By using the same antenna for both functions and detecting communication through load modulation on the power signal, the system eliminates redundant components and reduces manufacturing cost.
3Productivity
If multiple transmitter coils are used to power multiple receivers simultaneously, then productivity is improved, but cross-talk and interference between transmitters and receivers increase
Solution Approach 1:
The patent segments the power supply system into independent isolated power supplies for each transmitter coil. Each transmitter has its own dedicated power supply that is electrically isolated from other transmitters, preventing cross-talk and interference while allowing simultaneous operation of multiple transmitters with multiple receivers.
Solution Approach 2:
The patent introduces isolated power supplies as intermediary components between the main power source and each transmitter coil. These isolators act as mediators that prevent electrical interference and cross-talk between transmitters while still allowing them to operate simultaneously and independently.
4Adaptability or versatility
If additional system components are included for communications or increased charging area, then adaptability is improved, but device area increases
Solution Approach 1:
The patent merges communication functionality into the power transfer system by detecting load modulation on the power signal itself. This eliminates the need for separate communication antennas and circuitry, reducing the device area while maintaining full communication capability.
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 solution allows for efficient and interference-free simultaneous charging of multiple devices by isolating power supply and using data feedback to optimize power transmission, reducing costs and improving user experience.
Implementation Method 1
inductive and/or resonant 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
The operating frequency may be selected for a variety of reasons, such as, but not limited to, power transfer characteristics, power level characteristics, self-resonant frequency restraints
Data Source
AI summary
A dual wireless power transfer system is disclosed having an input power supply providing power at a first voltage V1 and a first wireless power transmission system receiving power at a first power input from the input power supply, the first wireless power transmission system including a first transmitter antenna and a first driver for driving the first transmitter antenna for wireless power transmission to a first wireless receiver system and wireless receipt of data from the first receiver system, wherein data wirelessly received at the first transmitter antenna from the first receiver system at least partially feeds back onto the first power input. A second wireless power transmission system includes a second transmitter antenna and a second driver for driving the second transmitter antenna for wireless power transmission to a second wireless receiver system. A low voltage drop out receives power from the input power supply at V1 and provides power at a preselected lower voltage V2 to the second wireless power transmission system, such that V2 is independent of data received at the first transmitter antenna.