PoE Power Distribution via Ethernet for Flexible Office AC Supply
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Solution Overview
Problem
Current PoE standards do not provide sufficient power to meet the needs of commercial office environments, requiring high voltage cabling that is unsafe and inflexible, and existing methods for controlling LED lights are complex and expensive.
Innovation Solution
A PoE system that delivers high voltage AC power by transmitting low voltage DC power over Ethernet cables, using power distribution units (PDUs) to invert DC power into AC, and incorporates a novel communication method through the physical layer of Ethernet connections for device control and sensor integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high voltage cabling is used to provide sufficient power for commercial office environments, then power delivery capability is improved, but safety and installation flexibility deteriorate
Solution Approach 1:
The system segments the power delivery function by using multiple low-voltage PoE connections (each providing up to 100W) instead of a single high-voltage connection. Multiple PoE-powered devices (injectors, splitters, PDUs) work together to deliver cumulative power (400W-1600W) to meet commercial office requirements while maintaining safety through low-voltage Ethernet cables throughout the distribution network.
Solution Approach 2:
The system introduces PoE-powered intermediary devices (PoE injectors, PoE splitters, PoE PDUs) that convert and distribute power at low voltage. These intermediaries receive high-voltage AC at centralized locations, convert to PoE DC, and distribute through Ethernet cables. This mediator approach enables high power delivery capability while maintaining safety through low-voltage cabling in the distribution network.
2Power
If high voltage cabling is installed for general power outlets, then power delivery capability is improved, but ease of installation and flexibility deteriorate
Solution Approach 1:
The power distribution system is segmented into PoE-capable zones where Ethernet cables carry power to PDUs, which then provide high-voltage AC outlets. This segmentation allows non-electricians to install Ethernet cabling themselves while professional electricians handle only the PDU installation and high-voltage connections, combining DIY flexibility with professional safety standards.
Solution Approach 2:
Ethernet cables are given universal dual functionality: carrying both data and power (PoE). This eliminates the need for separate high-voltage power cabling in PoE zones, allowing the same cable infrastructure to support both networking and power delivery. The system becomes more flexible as users can install Ethernet cables without electrician involvement, and PDUs provide high-voltage outlets where needed.
3Adaptability or versatility
If conventional electrical circuits are redesigned for changes in building use, then adaptability to new requirements is improved, but loss of time and disruption deteriorate
Solution Approach 1:
The system enables dynamic reconfiguration of power distribution by moving PoE PDUs and powered devices rather than rewiring fixed high-voltage circuits. Ethernet cables remain in place while PoE-powered devices can be relocated flexibly. This dynamic approach allows rapid adaptation to changing office layouts without the time-consuming and disruptive process of redesigning fixed electrical circuits.
4Power
If multiple high voltage circuits are installed for numerous workstations, then power delivery capability is improved, but device complexity and cost deteriorate
Solution Approach 1:
The system merges data and power delivery into a single PoE infrastructure. Multiple workstations share common Ethernet cabling and PoE distribution equipment (injectors, splitters, PDUs). This consolidation eliminates the need for separate high-voltage circuits for each workstation, reducing overall system complexity while maintaining sufficient power delivery capability through cumulative PoE connections.
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 reduces the need for high voltage cabling, enabling safer and more flexible installation by non-electricians, and provides a simpler, cost-effective method for controlling devices, meeting the power needs of office workers and environments.
Implementation Method 1
transmitting low voltage DC power over Ethernet cables
Implementation Method 2
receives the PoE connection and separates the power and data components
Implementation Method 3
power distribution units (PDUs) to invert DC power into AC
Data Source
AI summary
The present invention provides a system comprising PoE apparatus including midspans, switches and routers that can provide high powered PoE connections that enable the recovery of DC power in sufficient quantities that allow it to be converted to AC power by way of an inverter. The invention also provides a method for providing AC power, data and light to office workstations using a single PoE connection. The invention further comprises a common mode signaling system that operates independently of any TCP/IP signal transmitted through an Ethernet connection wherein said signaling system is adapted to communicate with and control PoE powered devices.