Wireless Charging Unit Sensor Circuit Power Management
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Solution Overview
Problem
Wireless charging units often remain active even when no charging is needed, leading to wasted energy and environmental impact due to continuous power consumption, as users frequently move devices on and off the charging interface without properly disconnecting the unit.
Innovation Solution
A wireless charging system that includes a sensor circuit to detect when a mobile device is removed from the charging interface, triggering a switch to disconnect power from the external source, thereby conserving energy by only drawing power when the device is present and charged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wireless charging unit remains continuously powered on to ensure immediate charging availability, then the charging readiness and user convenience are improved, but the energy consumption and environmental impact increase
Solution Approach 1:
The system performs preliminary detection of device presence using sensor circuits before activating the full charging process. The sensor circuit detects whether a mobile device is positioned on the charging interface, and only when detection confirms device presence does the system activate power reception and wireless power transmission, ensuring immediate charging readiness only when needed
Solution Approach 2:
The wireless charging unit autonomously monitors its own operational state through sensor circuits that detect device presence. The system automatically activates or deactivates power reception based on detected conditions, with the switch circuit responding to sensor signals to enable or disable power intake without user intervention, making the system self-regulating
2Loss of energy
If the wireless charging unit automatically disables power reception when no device is present, then the energy waste is reduced, but the system complexity increases due to additional sensor circuits and control mechanisms
Solution Approach 1:
The wireless charging unit is segmented into functionally independent modules: a sensor circuit for device detection, a switch circuit for power control, and a wireless power transmission component. This modular segmentation allows each component to perform its specific function with simple, dedicated circuitry, reducing overall system complexity while achieving automatic power management
Solution Approach 2:
A sensor circuit acts as an intermediary between the mobile device and the power transmission system. The sensor detects device presence and transmits this information to the switch circuit, which then controls power reception. This intermediary mechanism enables automatic energy management through simple detection and signaling rather than complex control algorithms
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 solution reduces unnecessary energy consumption and environmental impact by automatically disabling power reception when the device is not in use, optimizing the operational and downtime of wireless charging units.
Implementation Method 1
A power transmitter device may be configured to transmit power wirelessly to the mobile device unit when the mobile device unit is positioned upon the interface surface
Data Source
AI summary
A wireless charging unit for a mobile device unit. The wireless charging unit may include an interface surface for the mobile device unit to be positioned upon, and a power transmitter device configured to transmit power wirelessly to the mobile device unit when the mobile device unit is positioned upon the interface surface to charge the mobile device unit. A switch may be electrically coupled to a power connector plug and configured to disable reception of power by the power connector plug from a power outlet in response to a sensor circuit detecting that the mobile device unit has been removed from the interface surface to a distance.