Wireless Current Supply Device Design for Electric Vehicles
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Solution Overview
Problem
Current battery-powered electric vehicles face limitations in travel distance due to insufficient battery capacity, leading to increased battery weight and decreased efficiency, and require lengthy recharging times, unlike internal combustion engine vehicles which can refuel quickly.
Innovation Solution
A method and device for designing a current supply and collection system for electric vehicles that wirelessly supplies power using a magnetic field, allowing vehicles to travel long distances without heavy batteries and reducing recharging time by integrating power supply and collection devices with adjustable magnetic field strength and core width, enabling efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If battery capacity is increased to extend travel distance, then travel distance is improved, but battery weight increases and efficiency decreases
Solution Approach 1:
The patent replaces the mechanical battery storage system with a wireless electromagnetic power transmission system. The current supply device installed in the road uses electromagnetic induction to transmit power to the vehicle during motion, eliminating the need for large-capacity batteries and enabling extended travel distance without weight penalty
Solution Approach 2:
The current supply device is pre-installed in the road infrastructure before vehicle operation. This preliminary setup enables continuous power supply during vehicle motion, allowing the vehicle to travel long distances without carrying heavy energy storage devices
2Duration of action of moving object
If battery capacity is increased to extend travel distance, then travel distance is improved, but recharging time increases
Solution Approach 1:
The patent replaces the stationary battery charging system with a dynamic wireless power transmission system. Power is transmitted continuously during vehicle motion through electromagnetic induction between the current supply device in the road and the current collection device in the vehicle, eliminating the need for stationary recharging stops
Solution Approach 2:
The wireless power transmission operates continuously during vehicle motion, providing uninterrupted power supply. The current supply device maintains constant electromagnetic coupling with the current collection device as the vehicle passes over the installed section, enabling continuous energy transfer without interruption
3Power
If magnetic field strength is increased for efficient power transfer, then power transfer efficiency is improved, but electromagnetic interference increases
Solution Approach 1:
The patent optimizes the magnetic field parameters including strength, frequency, and distribution pattern to achieve efficient power transfer while controlling electromagnetic interference. The system adjusts these parameters based on the gap distance and operational requirements to balance power transfer efficiency with interference mitigation
Solution Approach 2:
The patent introduces magnetic poles as intermediary elements that mediate the electromagnetic interaction between the current supply device and current collection device. These magnetic poles concentrate and direct the magnetic field lines, improving coupling efficiency while containing the electromagnetic field within a controlled region to reduce interference
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 efficient power transfer to electric vehicles, decoupling functional requirements, and optimizing current supply and collection device design, allowing for longer travel distances without the need for heavy batteries and reducing recharging time.
Implementation Method 1
a method and device for designing a current supply and collection system for electric vehicles that wirelessly supplies power using a magnetic field
Data Source
AI summary
Provided is a method for designing a current supply device for wirelessly supplying power to a vehicle having a current collection device. In the design method, the gap between the two adjacent magnetic poles of the current supply device is received as input and then the gap between the current supply device and the current collection device is determined based on the gap between the two magnetic poles. Next, the magnitude of the power to be supplied to the current supply device is determined based on the value required with respect to the magnitude of the magnetic field and the gap between the current supply device and the current collection device. According to the design method, current supply device can easily be designed since various functional requirements are decoupled from each other.