In-Vehicle Wireless Charger Interference Reduction
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Solution Overview
Problem
Wireless charging systems in vehicles face interference issues with other electronic devices due to electromagnetic field emissions, which can cause operational failures and overheating in portable devices.
Innovation Solution
An in-vehicle wireless charging system that includes an inductive charger and a controller to detect the mode of operation of nearby devices, adjusting the frequency band and power levels to minimize interference by dynamically adjusting the charging parameters based on detected operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless charging is provided at high power levels, then charging speed and efficiency are improved, but electromagnetic interference with other vehicle systems increases
Solution Approach 1:
The patent applies dynamics by making the charging system adaptable and adjustable rather than fixed. The controller dynamically modifies charging parameters including frequency band selection and power level adjustments based on real-time detection of interfering devices and their operational modes, enabling the system to optimize charging speed while minimizing electromagnetic interference.
Solution Approach 2:
The patent changes physical parameters of the electromagnetic field by adjusting the frequency band and power levels. The system detects interfering devices and modifies charging parameters such as operating frequency and power output to reduce interference while maintaining effective charging, directly addressing the contradiction between high power charging and electromagnetic interference.
2Power
If the charging frequency is increased to improve charging efficiency, then power transfer rate increases, but interference with radio frequency devices increases
Solution Approach 1:
The patent directly applies parameter changes by adjusting the operating frequency band and power levels based on detected radio frequency devices. When interference is detected, the controller modifies the charging frequency and power output to eliminate or reduce radio frequency interference while maintaining acceptable charging performance.
Solution Approach 2:
The system uses feedback by detecting the presence and operational mode of nearby radio frequency devices, then using this information to adjust charging parameters. The controller continuously monitors the electromagnetic environment and modifies frequency and power levels in response to detected interference conditions.
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 reduces electromagnetic interference, preventing operational failures and overheating in portable devices by optimizing charging frequency and power levels in response to nearby device operations.
Implementation Method 1
Wireless chargers generate an electromagnetic field through the use of electromagnetic transducers to transfer the electric energy from the charging device to a receiver on a battery or device having a battery being charged
Implementation Method 2
Inductive chargers generate a magnetic field through the use of inductive coils to transfer the electric energy from the charging device to a receiver on a battery or device having a battery being charged
Data Source
AI summary
A method is provided for reducing interference in an inductive charging system within a vehicle. The method includes inductively charging a device with an inductive charger. The method also includes detecting at least one mode of operation of a potential interfering device in proximity to the inductive charger. The method further includes adjusting at least one of a frequency band employed by the charger and an amount of power provided to the device by the charger based on at least one detected mode of operation.