Wireless Power Resonance Alignment Using Near-Field Signal Strength
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Solution Overview
Problem
Existing noncontact power supply systems fail to efficiently detect positional deviations between the power transmission apparatus and the power reception apparatus, leading to inefficient power transfer between a ground power supplying apparatus and a vehicle.
Innovation Solution
A noncontact power supplying system that utilizes near field communication to detect positional deviations by emitting an alternating magnetic field or electric wave, allowing the ground power supplying apparatus to determine the relative positional relationship between the power transmission and reception circuits based on the strength of the received signal, enabling efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If near field communication is used for pairing and power supply, then power transfer is enabled between ground power supplying apparatus and vehicle, but positional deviation detection capability is lost
Solution Approach 1:
The signal emitting device and signal reception device are designed to serve dual purposes: near field communication for power supply pairing and positional deviation detection. By making these devices multi-functional, the system eliminates the need for separate detection equipment while simultaneously achieving both power transfer and position monitoring capabilities.
Solution Approach 2:
The system implements feedback by using the signal reception device to detect the strength of alternating magnetic fields or electric waves from the signal emitting device. This detected signal strength information is fed back to determine relative positional relationships, enabling continuous monitoring and adjustment of positional deviation during power transfer operations.
2Measurement precision
If signal emitting device emits alternating magnetic field or electric wave for position detection, then positional deviation can be detected, but device complexity increases
Solution Approach 1:
The signal emitting device and signal reception device are designed to serve dual purposes: near field communication for power supply pairing and positional deviation detection. By making these devices multi-functional, the system eliminates the need for separate detection equipment while simultaneously achieving both power transfer and position monitoring capabilities.
Solution Approach 2:
The patent merges the power communication function and position detection function into a single integrated system using the same hardware components (signal emitting device and signal reception device). This consolidation reduces overall system complexity by eliminating redundant equipment while maintaining both functionalities.
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 power transfer by accurately detecting positional deviations and adjusting power supply accordingly, ensuring optimal coupling between the power transmission and reception apparatuses.
Implementation Method 1
a signal emitting device for emitting an alternating magnetic field or electric wave for transmitting vehicle identification information of the vehicle to the ground power supplying apparatus
Implementation Method 2
a signal reception device for receiving an alternating magnetic field or electric wave emitted from the signal emitting device, and the ground power supplying apparatus detects a relative positional relationship between the power transmission side resonance circuit and the power reception side resonance circuit, based on the strength of the alternating magnetic field or electric wave which the signal reception device receives
Implementation Method 3
Known in the past has been the art of transferring power between a ground power supplying apparatus provided on a ground surface and a vehicle by noncontact, by using transmission methods such as magnetic field resonance
Data Source
AI summary
A noncontact power supplying system transfers power by noncontact between a ground power supplying apparatus and a vehicle. The vehicle includes a power reception side resonance circuit for receiving power, and a signal emitting device for emitting an alternating magnetic field or electric wave for transmitting vehicle identification information of the vehicle to the ground power supplying apparatus. The ground power supplying apparatus includes a power transmission side resonance circuit for transmitting power to the power reception side resonance circuit, and a signal reception device for receiving an alternating magnetic field or electric wave emitted from the signal emitting device. The ground power supplying apparatus detects a relative positional relationship between the power transmission side resonance circuit and the power reception side resonance circuit, based on the strength of the alternating magnetic field or electric wave which the signal reception device receives.