Power Sourcing Equipment Voltage Adjustment for Energy Conservation
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Solution Overview
Problem
Power sourcing equipment (PSE) in Power over Ethernet (PoE) systems wastes significant power by maintaining a constant high voltage output to compensate for voltage drops across ports, even when the actual voltage at the ports is sufficient, leading to inefficiency.
Innovation Solution
Implementing a method where the PSE detects connected devices and adjusts the power supply output voltage to the minimum required level by monitoring and measuring the voltage at each port, reducing the power supply output voltage when the port voltage exceeds a threshold, thereby conserving energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PSE maintains a constant high voltage output to compensate for voltage drops across ports, then the minimum voltage requirement for connected devices is ensured, but significant power is wasted
Solution Approach 1:
The patent applies dynamics by transitioning from a static constant voltage output to a dynamic adjustable voltage output. The PSE controller continuously monitors the voltage at each port and adjusts the power supply output voltage in real-time based on actual conditions. When voltage drops are detected, the controller increases the output voltage; when voltage is sufficient, it decreases the output voltage, thereby eliminating unnecessary power wastage while ensuring minimum voltage requirements are always met
Solution Approach 2:
The patent implements feedback by creating a closed-loop control system. The PSE controller measures the voltage at each port and uses this feedback information to adjust the power supply output voltage. This feedback mechanism allows the system to respond to actual voltage conditions at the ports and make appropriate adjustments to maintain compliance while minimizing power consumption
2Loss of energy
If the PSE decreases the power supply output voltage to conserve power, then energy efficiency is improved, but the voltage at ports may fall below the minimum required level
Solution Approach 1:
The system dynamically adjusts the power supply output voltage based on real-time monitoring of port voltages. The controller continuously adapts the output voltage to the minimum level necessary to maintain compliance at the ports, avoiding both over-voltage power wastage and under-voltage non-compliance
Solution Approach 2:
The feedback control mechanism ensures that the power supply output voltage is adjusted based on actual port voltage conditions. The controller receives feedback about voltage levels at each port and makes precise adjustments to maintain the minimum required voltage while conserving power
Data Source
AI summary
A method is provided to conserve power in a power sourcing equipment (PSE) that provides a PSE port voltage at PSE ports. The method includes, in response to detecting a powered device (PD) is connected to the PSE port, providing a power supply output voltage at a default value and turning on the PSE port. After turning on the PSE port, the method includes determining the PSE port voltage. When the PSE port voltage is greater than a threshold value, the method includes decreasing the power supply output voltage.