Wireless Power Transmitter Feedback for Invalid Receiver Data
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Solution Overview
Problem
Existing wireless power transfer systems face challenges with limited communication capacity and reliability, especially at higher power levels, which can lead to error situations when power receivers are moved, removed, or replaced.
Innovation Solution
A wireless power transmitter system that includes a communicator for receiving data from the power receiver via an out-of-band communication channel, a power loop controller to adapt the power level of the power transfer signal based on power control error messages, and a validity detector to identify invalid data by comparing a power level variation sequence with power change requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless inductive power transfer is used to eliminate physical electrical connections, then ease of operation is improved, but reliability deteriorates due to error situations when receivers are moved or removed
Solution Approach 1:
The system implements bidirectional communication where the power receiver sends power control error messages to the power transmitter, enabling real-time feedback about the power transfer status. This feedback mechanism allows the system to detect when a receiver is moved or removed and respond appropriately, maintaining reliability while preserving ease of operation.
Solution Approach 2:
The patent introduces a communication channel as an intermediary between the power transmitter and receiver. This separate communication path (distinct from the power transfer signal) enables reliable data exchange about power transfer status, allowing the system to monitor and respond to receiver movements or removals without affecting the wireless power transfer itself.
2Adaptability or versatility
If power control error messages are used to adapt power levels, then adaptability is improved, but device complexity increases due to additional communication and control mechanisms
Solution Approach 1:
The communication channel serves multiple functions: it transmits power control error messages for power level adaptation, communicates receiver status information, and enables bidirectional interaction between transmitter and receiver. This multi-functionality reduces the need for separate dedicated systems for each function, thereby limiting the increase in device complexity while maintaining high adaptability.
3Reliability
If out-of-band communication channel is used for data exchange, then communication reliability is improved, but device complexity increases due to additional communication infrastructure
Solution Approach 1:
The patent introduces a communication channel as an intermediary between the power transmitter and receiver. This separate communication path (distinct from the power transfer signal) enables reliable data exchange about power transfer status, allowing the system to monitor and respond to receiver movements or removals without affecting the wireless power transfer itself.
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 provides improved performance and reliability in wireless power transfer by efficiently controlling power transfer operations, reducing the risk of error scenarios, and ensuring data validity, thereby enhancing user experience and system stability.
Implementation Method 1
a wireless power transmitter for transferring power to a power receiver via a wireless inductive power transfer signal
Data Source
AI summary
A power transmitter (101) provides wireless power transfer to a power receiver (105) via a wireless inductive power transfer signal. The power transmitter (101) comprises transmitter coil (203) for generating the power transfer signal and a driver (201) generating a drive signal for this. A communicator (207) communicates with the power receiver (105) via a communication channel that does not use the power transfer signal as a communication carrier. A power loop controller (205) implements a power control loop by adapting a power level of the power transfer signal in response to power control error messages received from the power receiver (105). A generator (209) introduces a power level variation sequence to the power transfer signal and a validity detector (211) detects data received by the communicator (207) to be invalid data for the power transfer in response to a comparison of the power level variation sequence and power change requests of the power control error messages.