Dual Wireless Power Transmitter Isolation for Cross-Talk Mitigation
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Solution Overview
Problem
Current wireless power transfer systems face inefficiencies and interference issues when trying to simultaneously power multiple devices, as additional antennas and circuitry for data communication can lead to cross-talk and increased electromagnetic interference, complicating the design and increasing costs.
Innovation Solution
A dual wireless power transfer system with independent transmitter coils and drivers, where data feedback from receivers is used to adjust power inputs, and a low voltage drop-out isolates power supply to each transmitter system, reducing interference and allowing for efficient simultaneous charging of multiple devices.
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 communication capability is improved, but cross-talk and electromagnetic interference 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 modulating power parameters, eliminating the need for separate communication antennas and circuitry. This merging approach prevents cross-talk between antennas while maintaining full communication capability.
Solution Approach 2:
The patent makes the power transfer antenna multi-functional by enabling it to perform both power transfer and data communication tasks. Through in-band communication where data is encoded in power parameter modulations, the single antenna system achieves universal functionality, avoiding the interference problems associated with multiple specialized antennas.
2Productivity
If multiple transmitter coils and driver circuits are used to power multiple devices simultaneously, then charging capability is improved, but interference between receivers and transmitters increases
Solution Approach 1:
The patent implements feedback mechanisms where each transmitter receives status information from its coupled receiver and adjusts its operation accordingly. This feedback allows transmitters to coordinate their power transfer activities, preventing interference while maintaining the ability to charge multiple devices simultaneously. The system monitors and responds to receiver status to optimize multi-device charging.
3Adaptability or versatility
If additional antennas and circuitry are included for wireless power and data transfer, then communication versatility is improved, but device area and system complexity increase
Solution Approach 1:
The patent merges power transfer and data communication into a single integrated system using one antenna. By eliminating separate communication antennas and circuitry, the system achieves versatility in both power and data functions while reducing overall system complexity and device area requirements.
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 minimizes cross-talk and interference, enhancing communication capabilities and charging efficiency while reducing system complexity and costs by using a single power source for multiple transmitters.
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
resonant inductive wireless power transfer, which occurs when magnetic fields created by a transmitting element induce an electric field
Data Source
AI summary
A dual wireless power transfer system includes an input power supply 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 includes a first transmitter antenna and a first driver for driving the first transmitter antenna for wireless power transmission and wireless receipt of data, wherein data wirelessly received at the first transmitter antenna 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. A low voltage drop out receives power from the input power supply and provides power at a preselected lower voltage to the second wireless power transmission system, such that V2 is independent of data received at the first transmitter antenna.