Dynamic Vehicle Charging Control for EMI-Free Obstacle Detection
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Solution Overview
Problem
Existing vehicle charging systems face challenges in effectively charging electric vehicles while they are in a traveling state, particularly due to interference from electromagnetic noise generated during contactless power feeding, which can hinder obstacle detection and pre-crash systems.
Innovation Solution
A vehicle charging system that includes sensors for obstacle detection, a traveling control processor, a power receiver, an inverter, and a communicator, which sends a power-feeding control signal to restrict electric power feeding when obstacles are detected, thereby reducing electromagnetic noise and maintaining the reliability of pre-crash systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If contactless power feeding is performed to charge the vehicle while traveling, then the vehicle can be charged efficiently during motion, but electromagnetic noise is generated that interferes with obstacle detection and pre-crash systems
Solution Approach 1:
The system alternates between power feeding periods and obstacle detection periods. During power feeding, the system charges the vehicle; during detection periods, power feeding is suspended to eliminate electromagnetic noise interference with sensors. This periodic switching allows both charging and safe operation to occur at different times.
Solution Approach 2:
The system performs obstacle detection before initiating power feeding operations. By detecting obstacles in advance when no electromagnetic noise is present, the system ensures safety before charging begins, preventing potential hazards caused by undetected obstacles during power feeding.
2Use of energy by moving object
If power feeding is continuously performed to maximize charging speed, then energy transfer efficiency is improved, but electromagnetic interference prevents reliable sensor operation
Solution Approach 1:
The system extracts and removes the power feeding operation during obstacle detection periods. By taking out the power feeding function temporarily, the system eliminates electromagnetic interference, allowing sensors to operate reliably without harmful electromagnetic effects present during continuous power feeding.
Solution Approach 2:
The system applies preliminary anti-action by suspending power feeding before obstacle detection occurs. This preventive measure eliminates electromagnetic noise before it can interfere with sensor operations, ensuring reliable obstacle detection while maintaining overall charging functionality.
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 charges electric vehicles while ensuring the reliability of pre-crash systems by controlling power feeding to prevent interference from electromagnetic noise, ensuring safe and efficient operation.
Implementation Method 1
a power receiver configured to receive electric power from the traveling road
Data Source
AI summary
A vehicle charging system includes a sensor, a traveling control processor, a traveling drive unit, a transmitter provided on a vehicle configured to travel on a traveling road, and a power-feeding facility provided on the traveling road. The sensor detects obstacles present around the vehicle. The traveling control processor performs traveling control of the vehicle based on the result of detection by the sensor. The traveling drive unit drives the vehicle to travel and includes: a power receiver receiving electric power from the traveling road; a battery storing the electric power; a motor; and an inverter driving the motor with the electric power. The transmitter sends a power-feeding control signal when the sensor detects an obstacle. The power-feeding facility includes: a receiver receiving the power-feeding control signal; a power feeder performing a power-feeding operation; and a power-feeding control unit controlling the power-feeding operation based on the power-feeding control signal.