Mutual Inductance Approximation for Multi-Receiver Wireless Power
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Solution Overview
Problem
Existing multiple-receiver wireless power transfer technologies struggle to accurately compensate for real-time changes in receiver configuration, particularly in terms of mutual inductance between transmitters and receivers, and between receivers, which affects optimal operating conditions.
Innovation Solution
A real-time approximation method and apparatus that uses a computer device with a processor and memory to approximate mutual inductance between transmitters and receivers, as well as between receivers, based on current changes without additional measurement equipment or mapped data, allowing for optimal operating condition determination and compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing multiple-receiver wireless power transfer technologies are used, then power transfer capability is provided, but accurate real-time compensation for mutual inductance changes cannot be achieved
Solution Approach 1:
The system uses its own operational data (voltage and current measurements from existing components) to approximate mutual inductance values, eliminating the need for separate measurement equipment. The processor leverages data already being collected during normal operation to calculate coupling effects between receivers.
Solution Approach 2:
The patent introduces an intermediate approximation model that relates measurable quantities (voltage, current) to the difficult-to-measure mutual inductance values. This intermediary approach allows indirect determination of coupling effects through mathematical relationships rather than direct measurement.
2Adaptability or versatility
If real-time approximation of mutual inductance is implemented, then optimal operating conditions can be determined, but additional measurement equipment would be required
Solution Approach 1:
The system repurposes existing voltage and current sensors already present in the wireless power transfer system to gather data for mutual inductance approximation. No additional measurement hardware is needed as the system uses its own operational parameters for the calculation.
Solution Approach 2:
Existing measurement components serve dual purposes: monitoring system operation for power control and providing data for mutual inductance approximation. The same voltage and current measurements used for basic power management are also utilized for determining coupling effects between receivers.
3Loss of energy
If coupling effects between multiple receivers are considered, then transfer efficiency is maximized, but calculation complexity increases significantly
Solution Approach 1:
The patent divides the complex multi-receiver coupling problem into individual pairwise interactions. Instead of calculating all possible simultaneous interactions, the system approximates mutual inductance for each transmitter-receiver pair and receiver-receiver pair separately, then combines these individual effects.
Solution Approach 2:
The system transforms the complex physical problem of electromagnetic coupling into a mathematical approximation problem using voltage and current parameters. By changing the approach from direct electromagnetic field calculation to electrical parameter-based approximation, the computational complexity is reduced while maintaining sufficient accuracy.
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 enables stable and optimal operating conditions in multiple-receiver wireless power transfer systems by accurately approximating mutual inductance in real-time, thereby maximizing efficiency and adapting to changes in receiver configuration.
Implementation Method 1
A wireless power transfer is a non-contact power transfer technology in which electric energy supplied to a primary coil (transmitter) induces magnetic field energy, and the induced magnetic field energy induces electric energy again in a secondary coil (receiver).
Implementation Method 2
approximating a mutual inductance in the multiple-receiver wireless power transfer system according to a configuration status of receivers
Implementation Method 3
magnetic resonance type wireless power transfer, which shows high transfer efficiency even in a relatively large air gap
Data Source
AI summary
The embodiments relate to a real-time approximation method and apparatus of a mutual inductance between transmitters and receivers for determining an optimal operating condition in a multiple-receiver wireless power transfer system, and it may be configured to approximate a mutual inductance in the multiple-receiver wireless power transfer system according to a configuration status of the receivers, and determine an operating condition of the multiple-receiver wireless power transfer system based on the mutual inductance. According to the various example embodiments, the inductance may comprise a mutual inductance between the transmitter and the receivers, and a mutual inductance between the receivers.