Multi-Module Wireless Power Transfer Using Coupling Matrix Control
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Solution Overview
Problem
Existing contactless electric energy transfer systems face inefficiencies in energy transfer due to the use of radiation coupling, metamaterials, and beam shaping, particularly when the wavelength of the alternating energy field is large compared to the distance between the transmitting device and receiving modules.
Innovation Solution
A transmitting device with multiple modules and control means that controls electric energy sources to generate alternating energy fields based on coupling and cross-coupling matrices, optimizing energy transfer efficiency through singular value decomposition and adjustable compensation elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If radiation coupling is used for contactless energy transfer, then energy can be transferred over larger distances, but energy transfer efficiency deteriorates
Solution Approach 1:
The transmitting device is divided into multiple transmitting modules, each generating an alternating energy field. By segmenting the system into multiple independent modules with individual control, the patent enables selective activation and optimized field distribution, improving efficiency while maintaining transfer distance capability
Solution Approach 2:
The control means dynamically adjusts the electric alternating quantities of different transmitting modules in real-time based on coupling matrix calculations. This dynamic control allows the system to adapt to changing conditions and optimize energy distribution, resolving the contradiction between distance and efficiency
2Loss of energy
If beam shaping and metamaterials are used to focus energy, then energy transfer efficiency improves, but device complexity increases
Solution Approach 1:
Instead of using complex metamaterials or beam shaping mechanisms, the patent achieves efficiency improvement by changing operational parameters - specifically, by controlling the amplitude and phase of electric alternating quantities in different transmitting modules based on coupling factors. This parameter-based approach achieves focusing and optimization without adding physical complexity
Solution Approach 2:
The patent replaces physical beam shaping mechanisms and metamaterial structures with an electronic control system that uses mathematical calculations (coupling matrix) to achieve the same energy focusing effect. This substitution of mechanical/physical complexity with computational control resolves the contradiction
3Loss of energy
If multiple transmitting modules operate simultaneously, then energy transfer efficiency improves, but control complexity increases
Solution Approach 1:
The control means uses coupling matrix calculations that incorporate feedback from the system state to determine optimal electric alternating quantities for each transmitting module. This feedback mechanism enables coordinated control of multiple modules, achieving efficiency improvement while managing control complexity through systematic calculation rather than trial-and-error
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
Achieves higher electric efficiency by optimizing the distribution of currents and phases across multiple transmitting modules, compensating for stray impedances, and adjusting load resistors, resulting in improved energy transfer performance.
Implementation Method 1
contactless transfer of electric energy by means of inductive coupling or by means of capacitive coupling
Implementation Method 2
contactless transfer of electric energy by means of inductive coupling or by means of capacitive coupling
Implementation Method 3
at least one of the receiving modules includes an adjustable compensation element connected in parallel or in series to the field receiving element
Data Source
AI summary
Disclosed is a transmitting device for contactless transfer of electric energy by means of inductive coupling or by means of capacitive coupling to one or several receiving modules, each comprising a field receiving element for receiving electric energy, the transmitting device including: a plurality of transmitting modules, each including a field generating element for generating an alternating energy field and an electric energy source for providing an electric alternating quantity to the respective field generating element in a wired manner; and controller configured, in an energy transfer mode, to control the electric energy sources such that a plurality of the transmitting modules simultaneously generate one of the electric alternating fields each, wherein, in the energy transfer mode, the electric alternating fields are controlled in dependence on a singular value decomposition of a matrix depending on a coupling matrix, wherein the coupling matrix comprises coupling factors to several or to all of the field receiving elements for several or for all of the field generating elements.