Solving Wireless Charging Interference in PEPS Systems
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Summary
Problems
Existing passive entry passive start (PEPS) systems in vehicles face interference issues with wireless charging due to the use of similar low-frequency signals, necessitating a system that can operate both functionalities without causing low-frequency interference.
Innovation solutions
An electronic device with multiple exclusive modes, using a central interior antenna and separate modulation protocols for PEPS and wireless charging, ensuring no interference by activating only one mode at a time, and sharing common electronic components for both functionalities.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the vehicle uses low-frequency signals for both PEPS and wireless charging, then both functionalities can be integrated, but low-frequency interference occurs between the two systems
Why choose this principle:
The system divides the low-frequency signal usage into separate time segments: PEPS operations use low-frequency signals during one time period, while wireless charging uses low-frequency signals during another time period. This temporal segmentation eliminates interference while maintaining functional integration.
Principle concept:
If the vehicle uses low-frequency signals for both PEPS and wireless charging, then both functionalities can be integrated, but low-frequency interference occurs between the two systems
Why choose this principle:
The system implements periodic switching between PEPS mode and wireless charging mode, with each mode activated in alternating time periods. This periodic action ensures that low-frequency signals are used by only one function at a time, preventing interference while allowing both functionalities to operate.
Application Domain
Data Source
AI summary:
An electronic device with multiple exclusive modes, using a central interior antenna and separate modulation protocols for PEPS and wireless charging, ensuring no interference by activating only one mode at a time, and sharing common electronic components for both functionalities.
Abstract
An electronic device (ED) for controlling access to a vehicle using a portable identifier and for providing power to a portable device inside that vehicle comprises a plurality of external low frequency antenna (LA), a radio receiver (TRC) and a wireless charger (WIC). The electronic device (ED) operates in at least two mutually exclusive modes: a first mode where the electronic device (ED) sends a high- power signal to a portable identifier and exchanges data with said portable identifier using the radio receiver and the external low frequency antenna (LA); a second mode where the electronic device (ED) detects a portable device placed nearby the wireless charger (WIC), exchanges data and provides power to the portable device using a high power signal through the wireless charger (WIC).