Vehicular Wireless Power Control for Communication Interference
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Solution Overview
Problem
Inductive power-feeding devices, such as wireless chargers, generate electromagnetic noise that interferes with wireless communication systems in vehicles, particularly in environments with multiple devices around the driver's seat.
Innovation Solution
A vehicular system comprising a power-feeding device, a communication device, and a control device that temporarily stops power-feeding operations during wireless communication to prevent interference, and resumes power-feeding only after a predetermined time period has elapsed since the last control signal was received.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inductive power-feeding operation is performed continuously, then power supply efficiency is improved, but wireless communication reliability deteriorates due to electromagnetic noise interference
Solution Approach 1:
The power-feeding control device implements periodic action by temporarily suspending power-feeding operations during scheduled communication periods and resuming them after communication completes. This periodic on-off cycling of power transmission eliminates electromagnetic interference with wireless communication while maintaining overall power supply functionality, directly resolving the contradiction between continuous power supply efficiency and communication reliability
2Reliability
If power-feeding operation is stopped frequently to avoid interference, then wireless communication reliability is improved, but power supply efficiency deteriorates
Solution Approach 1:
The power-feeding control device applies preliminary action by proactively suspending power-feeding operations before communication interference occurs and automatically resuming them after communication completes. This anticipatory control prevents interference while minimizing disruption to power supply, balancing communication reliability with power supply efficiency by only interrupting power transmission when absolutely necessary
3Speed
If power-feeding operation resumes immediately after communication, then power supply responsiveness is improved, but communication interference may recur
Solution Approach 1:
The system applies preliminary action by implementing a predetermined time period delay before resuming power-feeding operations after communication completes. This time buffer ensures that any residual electromagnetic effects have dissipated and that communication is fully established, preventing recurring interference while maintaining reasonable power supply responsiveness through automatic resumption after the safety interval
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
Effectively inhibits communication interference by ensuring that power-feeding operations do not disrupt wireless communication and reduces user annoyance from repeated initiation and termination of power-feeding operations.
Implementation Method 1
For an inductive power-feeding device such as a wireless charger, the configuration such as an electromagnetic induction system or a magnetic field resonance system has been proposed to put into use.
Implementation Method 2
For an inductive power-feeding device such as a wireless charger, the configuration such as an electromagnetic induction system or a magnetic field resonance system has been proposed to put into use.
Implementation Method 3
both of the systems emit an electromagnetic wave and generate noise that interfere wireless communication around a power-feeding device
Data Source
AI summary
A vehicular system mounted to a vehicle includes: a power-feeding device that wirelessly feeds power to a power-feeding object device; a communication device that performs wireless communication with a predetermined portable device; and a control device that controls to stop a power-feeding operation of the power-feeding device when the communication device performs wireless communication with the portable device.