Power Insertion Device Hybrid Cable Power Delivery
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Solution Overview
Problem
Conventional copper-based networks using Category cables are limited in power delivery due to the constraints of 28 AWG wires and national standards limiting cable voltages to under 60 V DC, which restricts both the amount of power that can be delivered and the distance over which it can be provided.
Innovation Solution
A power insertion device that integrates fiber for data communication and wire for power transmission, using hybrid cables to deliver power efficiently, with a power insertion board converting AC mains power to DC for distribution through the cables, allowing for higher power delivery via larger wires like 22 or 18 AWG, and supporting protocols like PoE++ for higher power standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If 28 AWG wires in Category cables are used for power delivery, then the cable meets standard specifications, but the power delivery capability and distance are limited
Solution Approach 1:
The patent changes the wire gauge parameter from 28 AWG to larger gauge wires (22 AWG or 18 AWG) to reduce resistance and enable higher power delivery over longer distances. This parameter change directly addresses the limitation of standard Category cables while maintaining the PoE architecture.
2Power
If cable voltage is increased above 60 V DC, then higher power can be delivered, but compliance with safety standards and installation requirements becomes more complex
Solution Approach 1:
The patent introduces a voltage conversion intermediary system that converts AC mains power to regulated DC voltage (48V or 60V) at the point of insertion. This intermediary approach enables higher power delivery while maintaining compliance with safety standards by performing voltage conversion at the equipment level rather than requiring high-voltage cabling throughout the network.
3Power
If multiple 28 AWG wires are combined to deliver more power, then power capacity increases, but power dissipation increases markedly
Solution Approach 1:
The patent changes the fundamental parameter of wire resistance by using larger gauge wires (22 AWG or 18 AWG) instead of combining multiple 28 AWG wires. This single parameter change reduces both the power capacity limitation and the power dissipation issue simultaneously, as the larger wire cross-section reduces resistive losses according to P=I²R.
4Power
If hybrid cables with larger wires are used, then power delivery improves, but cable installation may require licensed personnel
Solution Approach 1:
The patent segments the power delivery function from the data communication function by using hybrid cables where fiber handles data and separate wire conductors handle power. This segmentation allows the power delivery component to use larger gauge wires for efficient power transmission while keeping the overall system within standard cable installation practices, avoiding the need for licensed electrical work.
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
Enables efficient and flexible power delivery to end devices over longer distances with reduced power losses, supporting high data rates and security, while adhering to safety standards, by placing the power insertion device close to end users or at farther locations using lower AWG wires as needed.
Implementation Method 1
one or more power supplies, configured to convert the AC mains power to direct current (DC) power
Data Source
AI summary
A power insertion device includes: an input interface, configured for receiving a fiber connection from a fiber network; an output interface, comprising one or more hybrid cables for connection to one or more end devices, each of the hybrid cables including fiber for data communication and wire for power transmission; a mains power interface, configured to receive alternating current (AC) mains power; one or more power supplies, configured to convert the AC mains power to direct current (DC) power; and a power insertion board, configured to provide power insertion of the DC power out through the one or more hybrid cables.