Non-contact Power Supply Mode Selection for Efficiency
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Solution Overview
Problem
Non-contact power supply systems face reduced transmission efficiency due to interference and multipath effects when using relay apparatuses, leading to lower efficiency in power transmission.
Innovation Solution
A non-contact power supply system that compares first and second transmission efficiencies, opting for direct power supply without a relay apparatus when second efficiency is higher, and using a relay apparatus when first efficiency is higher, while controlling resonant circuits and shielding to optimize power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a relay apparatus is provided to improve transmission efficiency, then power transmission efficiency is improved in direct supply mode, but transmission efficiency deteriorates due to interference and multipath effects when using the relay apparatus
Solution Approach 1:
The system dynamically changes the operational parameters by switching between two power supply modes (direct supply mode and relay supply mode) based on real-time transmission efficiency comparisons. When direct supply shows higher efficiency, the system selects direct supply mode; when relay supply shows higher efficiency, it selects relay supply mode, thus adapting to varying environmental conditions
Solution Approach 2:
The system implements a feedback mechanism by measuring and comparing transmission efficiency in both direct supply mode and relay supply mode, then using this comparison result to determine the optimal power supply mode. This closed-loop control ensures the system continuously operates at peak efficiency by responding to actual transmission conditions
2Area of stationary object
If a relay apparatus is added to extend power supply range, then coverage area is improved, but device complexity increases due to additional components and control mechanisms
Solution Approach 1:
The power supply system is designed with multi-functionality by integrating both direct supply capability and relay supply capability within a single system architecture. The relay apparatus can operate in two modes: extending power supply to distant devices or being bypassed for direct supply, making the system adaptable to different operational scenarios without requiring separate systems
Solution Approach 2:
The system employs dynamic configuration where the relay apparatus can be actively engaged or passively bypassed based on real-time conditions. The control unit dynamically switches between utilizing the relay for extended range and bypassing it for direct supply, allowing the system structure to adapt flexibly to operational 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 approach allows for efficient power supply by selecting the mode with higher transmission efficiency, thereby improving non-contact power transfer efficiency and simplifying the mechanism for mode selection.
Implementation Method 1
a power receiving apparatus that includes a power receiving device which receives the power transmitted from the wireless charging apparatus by a magnetic resonance relation
Implementation Method 2
a power transmission device that transmits power for charging, a power receiving apparatus that includes a power receiving device which receives the power transmitted from the wireless charging apparatus by a magnetic resonance relation
Data Source
AI summary
A non-contact power supply system, in which a first transmission efficiency of supply power in the case of supplying power in a first power supply mode of directly supplying power from a power supply apparatus to a power receiving apparatus and also supplying power to the power receiving apparatus through a relay apparatus, and a second transmission efficiency in the case of supplying the power in a second power supply mode of directly supplying the power from the power supply apparatus to the power receiving apparatus and not supplying the power from the power supply apparatus to the power receiving apparatus through the relay apparatus are compared.