Wireless Power Supply Control Using Resonance State Feedback
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Solution Overview
Problem
Existing wireless power supply systems face challenges in accurately controlling power delivery to electronic devices without sufficient power to detect their state, leading to potential over-supply of power.
Innovation Solution
A power supply apparatus equipped with a detection unit to monitor the resonance state between the power supply apparatus and the electronic device, using a CPU to control power output based on detected state information, ensuring appropriate power delivery and preventing excessive power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If power is supplied to enable state detection in the electronic apparatus, then the electronic apparatus can detect its state and notify the power supply apparatus, but the power supply apparatus may supply excessive power if the detection mechanism is not properly implemented
Solution Approach 1:
The electronic apparatus periodically detects its own state and notifies the power supply apparatus of the detection result through data communication. This feedback mechanism allows the power supply apparatus to adjust power supply based on actual device state, preventing excessive power supply while ensuring adequate power for state detection.
Solution Approach 2:
The system establishes a data communication channel before power supply control is implemented. The electronic apparatus is enabled to detect and communicate its state beforehand, so that the power supply apparatus can make informed decisions about power allocation without risking excessive power supply.
2Device complexity
If data communication and power transmission use the same antenna, then the system structure is simplified, but the power supply apparatus cannot accurately control power based on electronic apparatus state
Solution Approach 1:
The same antenna is used for both data communication and power transmission functions. The antenna serves multiple purposes: transmitting power wirelessly and enabling bidirectional data communication between the power supply apparatus and electronic apparatus. This multi-functionality maintains system simplicity while supporting accurate power control through state feedback.
3Measurement precision
If the electronic apparatus periodically detects its state and notifies the power supply apparatus, then appropriate power control is achieved, but communication reliability may be compromised without proper authentication
Solution Approach 1:
Authentication is performed before state detection and notification processes. The power supply apparatus and electronic apparatus establish authenticated communication channels in advance, ensuring that subsequent state notifications are from legitimate sources and preventing unauthorized or erroneous data transmission.
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
Enables precise control of power supplied to electronic devices, ensuring correct state detection and preventing excessive power delivery, thus optimizing power management.
Implementation Method 1
a power supply apparatus that performs data communication for transmitting a command to an electronic apparatus and transmitting power to the electronic apparatus via a same antenna
Implementation Method 2
a detection unit to detect a resonance state between the power supply apparatus and the electronic device
Data Source
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AI summary
A power supply apparatus includes a power supply unit that wirelessly supplies power to an electronic apparatus, a communication unit that communicates with the electronic apparatus, and a control unit that controls, based on whether information regarding the electronic apparatus that is received from the electronic apparatus is updated by the electronic apparatus, power to be supplied from the power supply apparatus to the electronic apparatus.