Inductive Charging Signal Modulation Detection for Reliable Power Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inductive power transfer systems face challenges in accurately determining if a device is within range and if charging is complete due to impedance changes and noise coupling, leading to erroneous data reception and potential premature cessation of charging.
Innovation Solution
The system employs a method to transmit and receive signals inductively, with a controller determining if the received signal comprises a modulation to adjust power transmission and ensure continued charging even with corrupted data, using a transceiver unit and power supply to manage inductive power transfer and data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the adapter and mobile phone are electrically coupled during charging to enable data communication, then data can be transmitted inductively, but impedance changes in the mobile phone cause distortions to the transmitted data
Solution Approach 1:
The power supply uses feedback mechanisms to detect impedance changes in the circuit and adjust its operation accordingly. The system monitors the inductively received signals for modulation patterns that indicate impedance variations, and uses this feedback to compensate for data distortions caused by mobile phone usage during charging.
2Adaptability or versatility
If the mobile phone is used for calling during charging, then communication functionality is maintained, but impedance changes occur that distort the inductively transmitted data
Solution Approach 1:
The system detects parameter changes (impedance variations) caused by mobile phone usage during charging and adapts its operation. By monitoring changes in the electrical characteristics of the coupled circuit, the power supply can distinguish between intentional modulation (data transmission) and impedance variations (phone usage), thereby maintaining data accuracy despite device versatility.
3Loss of information
If noise from the mobile phone couples with the adapter circuitry, then electrical coupling enables data communication, but the noise distorts the data being induced to the power supply
Solution Approach 1:
The system converts the harmful noise coupling effect into a useful indicator. By detecting specific noise patterns and impedance variations caused by mobile phone usage, the system can distinguish these from actual data modulation, thereby filtering out noise interference while maintaining the ability to receive legitimate data transmissions.
4Ease of operation
If variations in distance between power supply and adapter occur, then wireless flexibility is maintained, but distortions in the inductively received data occur
Solution Approach 1:
The system dynamically adapts to distance variations between the power supply and adapter. By continuously monitoring the characteristics of inductively received signals and detecting modulation patterns, the system can compensate for changes in coupling efficiency caused by distance variations, maintaining data reception accuracy across a range of placements.
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
This approach allows for reliable inductive power transfer and data communication, ensuring charging continues even with erroneous data and enables detection of devices within range, reducing interruptions and maintaining efficient power consumption.
Implementation Method 1
Induction can be used to transfer power wirelessly from a power supply to a mobile phone to be charged
Implementation Method 2
the mobile phone can connect to an adapter that can receive the induced power so as to provide a charging current
Implementation Method 3
the adapter can use the inductively received power to inductively send data to the power supply
Data Source
AI summary
There is provided a method comprising transmitting inductively a first signal, receiving inductively a second signal in response to the first signal, determining whether the inductively received signal comprises a modulation, and adjusting a power of the transmitted signal on the basis of a modulation of the received signal.