Power Adapter Phantom Load Reduction via Automatic Disconnect
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Solution Overview
Problem
Portable power devices continue to draw phantom load when not connected to electronic devices, contributing to increased energy consumption and environmental impact, despite efforts towards energy efficiency, as users often fail to unplug them due to convenience issues and the need for mechanical switches that require user intervention.
Innovation Solution
A power device with a remote switch assembly that automatically turns off when the electronic device is fully charged or disconnected, using a toggle, rocker, or motion-sensing switch to disconnect power, and incorporates timers or power-sensing circuits to minimize power draw to zero or negligible levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power device remains plugged in for convenience, then ease of operation is improved, but phantom load increases energy consumption
Solution Approach 1:
The power device automatically detects when no electronic device is connected and autonomously shuts off power intake without requiring user intervention. The system monitors connection status and self-regulates power consumption, eliminating the need for users to manually unplug the device while preventing phantom load energy waste.
2Loss of energy
If automatic shut-off feature is added, then energy consumption is reduced, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical switch mechanisms with electronic detection circuitry that monitors connection status and controls power intake electronically. This substitution reduces mechanical moving parts while achieving automatic shut-off functionality through electronic sensing and control, balancing energy savings with acceptable device complexity.
3Extent of automation
If remote switch assembly is implemented, then user intervention is eliminated, but ease of operation may be compromised
Solution Approach 1:
The power device incorporates feedback mechanisms that continuously monitor connection status and automatically adjust power intake accordingly. The system provides real-time detection of electronic device presence and responds by enabling or disabling power delivery, achieving full automation while maintaining operational simplicity through intelligent sensing and control loops.
Data Source
AI summary
An embodiment of the present invention is directed to a power device for an electronic device, such as a charger for a portable rechargeable device and/or an AC adapter. The power device includes switching circuitry for de-powering at least a portion of the power device when the electronic device is either not drawing power or is disconnected from the power device.