Power Providing Device Dual Voltage Standby Efficiency
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Solution Overview
Problem
Power over Ethernet (PoE) systems face inefficiencies in stand-by situations where power-consuming devices idle, leading to increased energy consumption and reduced operational efficiency, especially when all ports are idle, causing the main power supply to operate at an unfavorable point with efficiency dropping below 10%.
Innovation Solution
Implementing a power providing device that supplies power at two voltage levels, a higher first voltage for active operation and a lower second voltage for stand-by mode, using dedicated conductors for each voltage level to enhance conversion efficiency and promote devices into sleep mode, while being backward compatible with non-aware devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power providing device continues to supply power at the first voltage during stand-by situations, then the power receiving device can remain in active mode with full functionality, but the power consumption increases significantly and the power providing device operates at unfavorable efficiency points
Solution Approach 1:
The power providing device dynamically switches between first voltage (higher) and second voltage (lower) based on the operational state of the power receiving device. During active operation, the device receives power at the first voltage to maintain full functionality. During stand-by situations, the device automatically transitions to receiving power at the second voltage to reduce power consumption, while the power providing device adjusts its output accordingly to operate at favorable efficiency points.
2Use of energy by moving object
If the power providing device switches to the second voltage during stand-by mode, then power consumption is reduced by up to 90%, but the system must ensure backward compatibility with non-aware devices
Solution Approach 1:
The system implements local quality by providing different voltage levels to different power receiving devices based on their awareness status and operational state. Aware devices that enter stand-by mode receive the second voltage for reduced power consumption, while non-aware devices or devices requiring full functionality continue to receive the first voltage. This localized differentiation resolves the contradiction between power reduction and system compatibility.
Solution Approach 2:
The invention changes the voltage parameter from a fixed value to a dynamically adjustable parameter. The power providing device monitors the operational state of connected devices and adjusts the output voltage between the first voltage (for active/full-power mode) and the second voltage (for stand-by/low-power mode). This parameter change enables the system to achieve up to 90% power consumption reduction during stand-by while maintaining compatibility with various device types through intelligent voltage selection.
3Productivity
If the power providing device operates at the first voltage continuously, then all power receiving devices can maintain active operation, but the overall energy efficiency of the system drops below 10% during stand-by periods
Solution Approach 1:
The power providing device implements periodic action by alternating between two operational states: providing power at the first voltage when power receiving devices are actively operating, and providing power at the second voltage when devices are in stand-by mode. This periodic switching between high-voltage/active-state and low-voltage/stand-by-state ensures that the system maintains operational availability when needed while achieving high energy efficiency during idle periods, resolving the contradiction between productivity and energy loss.
Data Source
AI summary
The invention relates to a power providing device (1), a power receiving device (2) and a corresponding method of providing power from a power providing device (1) to multiple power receiving devices (2) allowing for a reduction of the power consumed in stand-by situations. The invention provides for a distribution system allowing for providing standby assistance low voltage allowing for increased efficiency operation.