NFMI Power Receiver Polling for Passive Device Communication
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Solution Overview
Problem
Existing wireless power transfer systems struggle to simultaneously transfer electrical power and communicate data with passive devices using near-field magnetic induction (NFMI).
Innovation Solution
A wireless power receiver system is designed with additional functionality as an NFMI polling device, equipped with an antenna, power conditioning system, and a controller that can receive wireless power signals and transmit polling signals to passive devices, enabling data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If wireless power transfer systems use NFMI for power transmission, then power transfer efficiency is improved, but the ability to communicate data with passive devices deteriorates
Solution Approach 1:
The wireless power receiver system is designed to perform multiple functions: it can receive wireless power signals through its antenna and simultaneously transmit polling signals to passive devices for data communication. The controller manages both power reception and communication functions, allowing the system to adapt between power transfer mode and data communication mode, thereby achieving multi-functionality that resolves the contradiction between power transfer efficiency and data communication capability
2Loss of energy
If the antenna is optimized for power reception, then power transfer efficiency is improved, but the ability to transmit polling signals to passive devices deteriorates
Solution Approach 1:
The system employs dynamic switching between different operational modes. The controller can switch the antenna between power reception mode and polling signal transmission mode based on operational requirements. This dynamic adaptability allows the antenna to be optimized for power reception when receiving power, while still maintaining the capability to transmit polling signals for data communication with passive devices when needed
3Reliability
If the system focuses on wireless power transfer functionality, then power transfer reliability is improved, but the functionality for communicating with passive devices deteriorates
Solution Approach 1:
The system segments its operational modes into distinct power transfer function and data communication function. The controller manages these segmented functions separately, ensuring that power transfer reliability is maintained through dedicated power reception protocols, while communication functionality is enabled through integrated polling signal transmission capability. This segmentation allows each function to operate optimally within its own domain while coexisting in the same system
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
The system effectively transfers electrical power to wireless receiver systems while enabling data communication with passive devices, enhancing the functionality of wireless power transfer systems.
Implementation Method 1
Near field magnetic induction (NFMI) is used for both near-field data communications... and for wireless power transfer... NFMI... enables the transfer of signals wirelessly through magnetic induction between a transmitter antenna and a receiving antenna
Implementation Method 2
The power conditioning system is configured to receive the wireless power signals and convert the wireless power signals to electrical energy for powering a load associated with the wireless power receiver system
Implementation Method 3
Such near-field magnetic coupling may provide connection via 'mutual inductance,' which, as defined herein is the production of an electromotive force in a circuit by a change in current in at least one other circuit magnetically coupled to the first
Implementation Method 4
The controller includes a driver... configured to provide polling driving signals to the driver for generating the polling signals
Data Source
AI summary
A wireless power receiver system utilizes near-field magnetic induction (NFMI) to receive wireless power signals and receive or transmit wireless data signals in-band of a carrier signal. The wireless power receiver system includes an antenna, a power conditioning system, and a controller. The antenna is configured to receive wireless power signals and transmit polling signals. The power conditioning system is configured to receive the wireless power signals and convert the wireless power signals to electrical energy for powering a load associated with the wireless power receiver system. The controller includes a driver, at least one first machine-readable medium, and program instructions stored on the at least one first non-transitory machine-readable medium that are executable by the controller such that the controller is configured to provide polling driving signals to the driver for generating the polling signals.