Inductive Charger Controller AM Band Interference
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Solution Overview
Problem
Wireless charging systems in vehicles face interference issues with other vehicle systems due to electromagnetic fields, particularly in the AM frequency band, which can cause operational failures and overheating in devices.
Innovation Solution
An inductive charging system with a controller that detects the operation of receivers in the AM band and adjusts the frequency band and power supply to minimize interference, ensuring safe and efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an inductive charger is used to provide wireless charging in a vehicle, then charging convenience is improved, but frequency interference with other vehicle systems (particularly AM band receivers) occurs
Solution Approach 1:
The controller performs preliminary detection of AM band receiver operation status before initiating or adjusting charging. By detecting whether a receiver is tuned to AM frequencies in advance, the system can proactively adjust charging parameters to prevent interference, rather than reacting after interference occurs
Solution Approach 2:
The charging system dynamically adjusts its operating frequency and power output based on real-time detection of receiver status. The controller continuously monitors receiver operation and modifies charging parameters accordingly, making the system adaptive rather than static
2Productivity
If the charging frequency is increased to improve charging speed, then charging efficiency is improved, but interference with AM band receivers worsens
Solution Approach 1:
The system changes operating parameters (frequency and power level) based on receiver status. When AM band interference is detected, the controller adjusts frequency away from interfering values and modifies power output, demonstrating parameter adaptation to resolve the contradiction between charging speed and interference reduction
3Productivity
If the power output is increased to reduce charging time, then charging efficiency is improved, but the risk of overheating and operational failures increases
Solution Approach 1:
The controller uses feedback from receiver status detection to adjust power output. By monitoring whether a receiver is operating in AM band mode and responding by adjusting charging parameters, the system creates a feedback loop that prevents overheating and operational failures while maintaining efficient charging when conditions permit
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 reduces interference between the charging system and other vehicle devices, preventing operational failures and overheating, while maintaining efficient charging capabilities.
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 for reducing interference in an inductive charging system is provided. The method includes steps of inductively charging a chargeable device with an inductive charger, detecting the operation of a receiver in an AM band, and adjusting at least one of a frequency band employed by the charger and an amount of power provided to the chargeable device by the charger based on the operation of the receiver in the AM band.