Mid-Span PoE Injector Voltage Regeneration
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Solution Overview
Problem
Current Power-over-Ethernet (PoE) distribution systems face inefficiencies due to centralized Power Sourcing Equipment (PSE) and the need for multiple Ethernet cables, leading to voltage drops that can result in noncompliant power delivery to devices, especially over longer cable lengths, and require costly infrastructure reconstruction for installations across multiple floors.
Innovation Solution
An Ethernet switch that collects power from multiple PSEs, distributes it judiciously among ports, and boosts the voltage to ensure that downstream devices receive the minimum required input voltage, even over extended cable lengths, using active pass-through circuits and voltage regulators to maintain compliance with IEEE 802.3 standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized Power Sourcing Equipment (PSE) is used to distribute power over Ethernet cables, then power delivery to devices is achieved, but voltage drops occur over longer cable lengths resulting in noncompliant power delivery
Solution Approach 1:
The patent introduces a mid-span injector as an intermediary device between the centralized PSE and downstream PoE devices. This injector collects power from multiple PSEs, boosts the voltage using voltage regulators, and redistributes the regenerated power to downstream devices, thereby eliminating the harmful voltage drop effect over long cable lengths and ensuring IEEE 802.3 compliance.
Solution Approach 2:
The patent changes the voltage parameter by using voltage regulators to boost the collected power from multiple PSEs to a higher voltage level before redistribution. This parameter transformation compensates for voltage drops accumulated over long Ethernet cable runs, ensuring that downstream devices receive sufficient voltage to meet compliance requirements.
2Adaptability or versatility
If multiple Ethernet cables are installed to connect devices across multiple floors, then device connectivity is achieved, but costly infrastructure reconstruction is required
Solution Approach 1:
The patent merges power from multiple existing PSEs at a mid-span injector location, allowing downstream devices to receive power through a single Ethernet cable connection to the injector rather than requiring separate cable installations from each PSE. This combining approach reduces infrastructure complexity and installation costs while maintaining device connectivity across multiple floors.
Solution Approach 2:
The mid-span injector serves multiple functions: collecting power from multiple PSEs, boosting voltage, and redistributing power to multiple downstream devices. This multi-functional device eliminates the need for dedicated cable runs from each PSE to each device, providing universal power distribution capability that reduces installation costs and improves adaptability.
3Reliability
If voltage is boosted to compensate for cable length, then minimum required input voltage is ensured, but power distribution efficiency may be reduced
Solution Approach 1:
The mid-span injector autonomously collects power from multiple PSEs, automatically boosts the voltage using voltage regulators, and redistributes the regenerated power to downstream devices without requiring external intervention. This self-service capability ensures voltage sufficiency for long cable runs while minimizing energy loss through efficient local power regeneration rather than transmitting high voltage over long distances.
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 maximizes the number of devices that can be powered and the length of Ethernet cables used while ensuring all devices receive sufficient voltage, reducing the need for extensive cable installations and maintaining compliance with power standards, thus enhancing power distribution efficiency and reducing costs.
Implementation Method 1
using active pass-through circuits and voltage regulators to maintain compliance with IEEE 802.3 standards
Data Source
AI summary
Systems and methods for power distribution by an ethernet controller are disclosed. A first input port receives a first power carried by a first ethernet cable and sourced by a first source PoE device. A second input port receives a second power carried by a second ethernet cable and sourced by a second source PoE device. The first input port is at a first voltage lower than a minimum voltage of a specified input voltage range and the second input port is at a second voltage lower than the minimum voltage of the specified input voltage range. A controller, coupled to the first and second input ports, substantially equalizes current flowing across a first output port and a second output port, coupled to the downstream PoE devices, such that a load, caused by the downstream PoE devices, between the first output port and the second output port is shared.