Wireless Power Resonator Selection for Multi-Device Leakage Control
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in efficiently transmitting power to multiple power receiving devices with different configurations, as they require selective use of power transmission resonators that may not match the number and type of power receiving resonators, leading to inefficiencies and increased power consumption.
Innovation Solution
A wireless power transmission device with multiple power transmission resonators, a communicator, a power transmission controller, and a power transmission circuit that selects and adjusts resonators based on information received from the power receiving device, allowing for wireless power transmission to multiple devices with different configurations by suspending unnecessary resonators and using active cancellation techniques to reduce electromagnetic field leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power transmission resonators are used to handle multiple power receiving devices with different configurations, then adaptability is improved, but device complexity increases
Solution Approach 1:
The power transmission device dynamically selects and activates specific power transmission resonators based on the configuration information of the power receiving device. The controller receives information about the number and type of power receiving resonators, then selectively activates the corresponding number of power transmission resonators, making the system adaptable without requiring all resonators to be permanently active and complexly configured.
Solution Approach 2:
The power transmission device uses multiple power transmission resonators that can serve different functions depending on the power receiving device configuration. The same resonators can be selectively activated to match different numbers and types of power receiving resonators, making the transmission device universal in handling various device configurations.
2Reliability
If all power transmission resonators are activated to ensure power transmission capability, then power transmission reliability is improved, but power consumption increases
Solution Approach 1:
Instead of activating all power transmission resonators, the controller activates only the necessary number of resonators based on the power receiving device's configuration. If the power receiving device has one power receiving resonator, only one power transmission resonator is activated; if it has two, then two are activated. This partial action ensures sufficient power transmission capability while avoiding the excessive power consumption of activating all resonators.
Solution Approach 2:
The controller receives feedback information from the power receiving device about its configuration (number and type of power receiving resonators). Based on this feedback, the controller makes an informed decision about which power transmission resonators to activate, ensuring reliable power transmission while optimizing power consumption by activating only the necessary resonators.
3Adaptability or versatility
If configuration information is exchanged between power transmission and power receiving devices, then adaptability is improved, but communication complexity increases
Solution Approach 1:
The power receiving device transmits its configuration information (number and type of power receiving resonators) to the power transmission device before power transmission begins. This preliminary action allows the controller to plan and select the appropriate power transmission resonators in advance, simplifying the subsequent power transmission process and reducing the need for complex real-time communication and adjustment mechanisms.
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
Enables efficient wireless power transmission to multiple power receiving devices with varying configurations, reduces power consumption by suspending unused resonators, and minimizes electromagnetic field leakage through active cancellation, thereby improving overall system efficiency and adaptability.
Implementation Method 1
both a power source as a power transmitter and an electric vehicle as a power receiver include a resonator, and produce resonance in the resonators, to thereby increase a distance over which power can be transmitted
Implementation Method 2
a power transmission resonator and a power receiving resonator perform wireless power transmission in an inductive coupling manner
Implementation Method 3
an active cancellation resonator configured to reduce leakage of an electromagnetic field generated in the space by the power transmission resonator and the power receiving resonator
Data Source
AI summary
A wireless power transmission device related to embodiments of the present invention includes a plurality of power transmission resonators, a communicator, a power transmission controller and a power transmission circuit.The communicator receives information related to a power receiving resonator provided in a power receiving device.The power transmission controller selects a power transmission resonator to be used in power transmission from the plurality of power transmission resonators based on the information related to the power receiving resonator.The power transmission circuit transmits an electric current to the power transmission resonator to be used in the power transmission.