Dynamic Power Control for PoE Systems
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Solution Overview
Problem
The existing Power Over Ethernet (POE) systems face inefficiencies in power control, leading to wasted output power and low utilization rates due to the limitation in the number of connected devices and the maximum power supply, resulting in frequent device power on and off cycles when the total required power exceeds the system's capacity.
Innovation Solution
A method that dynamically calculates the total required power and sets different power thresholds to prioritize and manage the power distribution among devices, where the second power threshold is the nominal output power, and the first power threshold is dynamically calculated to prevent frequent power cycling, ensuring stable operation by powering off lower-priority devices when the total required power exceeds the second threshold and not powering on new devices when it reaches the first threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power sourcing equipment supplies power to all connected powered devices based on their maximum power levels, then the powered devices can operate at full capacity, but the output power of the power sourcing equipment is wasted when total required power is less than total output power
Solution Approach 1:
The patent implements dynamic power control by continuously monitoring the actual power consumption of powered devices and adjusting the power supply accordingly. The power sourcing equipment dynamically calculates the sum of actual power consumptions and compares it with the total output power capacity, adjusting power allocation in real-time to match actual demand rather than relying on fixed maximum power levels, thereby eliminating power waste while maintaining full operational capacity when needed.
2Ease of operation
If the power sourcing equipment uses fixed power thresholds to control power distribution, then the power control process is simple, but frequent power on and off cycles occur when total required power exceeds total output power
Solution Approach 1:
The patent introduces a dynamic power control mechanism that continuously monitors actual power consumption and adjusts power allocation in real-time. When the sum of actual power consumptions exceeds the total output power capacity, the system dynamically identifies which powered devices to power off based on their actual consumption patterns and priority levels, rather than using fixed thresholds that cause frequent cycling. This dynamic approach maintains operational stability while preserving control simplicity.
Solution Approach 2:
The patent implements a feedback mechanism where the power sourcing equipment continuously monitors the actual power consumption of connected powered devices and uses this information to adjust power allocation. The system compares the sum of actual power consumptions with the total output power capacity and adjusts power distribution accordingly, preventing frequent power on and off cycles by responding to real-time demand changes rather than relying on fixed thresholds.
3Reliability
If the power sourcing equipment powers on devices based on priority levels, then high-priority devices are ensured power supply, but lower-priority devices experience frequent power cycling
Solution Approach 1:
The patent implements dynamic power allocation that continuously adjusts power distribution based on real-time actual power consumption data. When power capacity is insufficient, the system dynamically determines which powered devices to power off by comparing actual consumptions against priority levels and total capacity constraints, rather than using static priority-based allocation. This ensures high-priority devices maintain reliable power supply while optimizing overall power utilization by allowing lower-priority devices to be powered off more strategically, preventing frequent cycling and improving overall system efficiency.
Data Source
Figure 1~3
AI summary
The embodiments of the present application disclose a power control method, apparatus, and electronic device applicable to a power over Ethernet system, which relate to the power control technology, and can improve the power control efficiency of the power over Ethernet system. The power control method applicable to the power over Ethernet system includes: when it is determined that there is a target powered device is connected to the power over Ethernet system, calculating a sum of actual power of all powered devices currently powered on to obtain a total required power; and determining whether the total required power exceeds a preset second threshold power threshold, if yes, powering off a powered device that is currently powered on according to priorities corresponding to port numbers of all the powered devices that are currently powered on until the total required power is less than the second power threshold; if not, determining whether to power on the target powered device according to a preset first power threshold, wherein the second power threshold is greater than the first power threshold. This application is applicable to perform power control on powered devices connected to the power over Ethernet system.