Wireless Power Feeding Station Coil Alignment Guidance
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Solution Overview
Problem
Contactless power feeding systems for electric mobility vehicles face inefficiencies due to variations in the positional relationship between the feeder and receiver coils, leading to inconsistent power transmission efficiency.
Innovation Solution
A power feeding station with a feeder coil and a control circuit that adjusts the frequency and voltage of alternating current power supplied to the feeder coil, providing guidance through a notification source to optimize the positional alignment of the coils for enhanced power transmission efficiency, including determining the direction of movement based on temporal changes in frequency or voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contactless power feeding is implemented between feeder and receiver coils, then power transmission is achieved independently of slight positional changes, but power transmission efficiency varies due to positional relationship between coils
Solution Approach 1:
The control circuit monitors the actual power transmission efficiency by detecting parameters such as coupling coefficient or power reception status, and provides feedback through the notification source to guide the user to adjust the positional relationship between coils, thereby optimizing efficiency while maintaining transmission stability
Solution Approach 2:
The system changes operational parameters such as frequency and voltage of the alternating current supplied to the feeder coil to adapt to different positional relationships, maximizing power transmission efficiency under varying conditions
2Loss of energy
If the feeder coil and receiver coil are positioned closer to increase power transmission efficiency, then foreign objects may enter between the coils causing safety issues
Solution Approach 1:
The notification source acts as an intermediary that provides guidance information to the user about optimal positioning, allowing the system to achieve high efficiency without requiring the coils to be in direct close contact, thereby reducing foreign object intrusion risk
Solution Approach 2:
The system replaces direct physical proximity requirement with electronic control and notification mechanisms, using frequency and voltage adjustments combined with user guidance to achieve efficiency without mechanical close positioning
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
The system effectively increases power transmission efficiency by guiding the electric mobility vehicle to the optimal positional relationship between the feeder and receiver coils, reducing the likelihood of foreign objects interfering and ensuring consistent power delivery.
Implementation Method 1
The feeder coil thus generates a magnetic field
Implementation Method 2
The coil for receiving power (hereafter referred to as a receiver coil) in the device for receiving power (hereafter referred to as a receiver) resonates with the magnetic field to allow contactless power feeding from the feeder to the receiver
Data Source
AI summary
A power feeding station according to one or more embodiments may include a feeder including a feeder coil that feeds power to a receiver in an electric mobility vehicle, a power supply circuit that supplies AC power to the feeder coil, and a control circuit that controls a frequency and a voltage of the AC power. The control circuit provides, through a notification source a notification of guidance about a stop position of the electric mobility vehicle relative to a housing to increase power transmission efficiency from the feeder to the receiver in accordance with the frequency of the AC power supplied to the feeder coil with which the receiver outputs a constant voltage or in accordance with the voltage of the AC power supplied to the feeder coil with which the receiver outputs a constant and predetermined voltage.