AC Power Over Ethernet Switch With Cable Integrity Testing

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Solution Overview

Problem

Conventional power-over-Ethernet (POE) systems primarily focus on direct current (DC) power distribution, which has limitations in scaling up and requires licensed electricians for alternating current (AC) power distribution due to safety concerns, necessitating an AC POE solution that ensures safety and scalability.

Innovation Solution

The implementation of a method and system that provides alternating current (AC) power over Ethernet networks using protection circuitry, cable testing with time-domain reflectometry, and continuous monitoring to ensure cable integrity and safety, allowing for automation in AC power distribution without the need for licensed electricians.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If DC POE power levels are increased to meet growing power requirements, then power delivery capability is improved, but safety hazards and system reliability deteriorate due to limitations in DC power distribution over Ethernet

Engineering Contradiction:

Improvepower delivery capabilityVSAvoidsystem reliability

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The patent transitions from DC power to AC power delivery over Ethernet cables, fundamentally changing the electrical parameters (voltage, current characteristics) to enable higher power delivery while maintaining safety through standardized AC distribution protocols and isolation mechanisms

Inventive Principle:

Principle #35Parameter changes

2Power

If AC power distribution is implemented in traditional structures, then power delivery capability is improved, but installation complexity and time increase due to requirements for licensed electricians, permits, and inspections

Engineering Contradiction:

Improvepower delivery capabilityVSAvoidinstallation complexity

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The system enables automated AC power distribution through Ethernet infrastructure that can be deployed by network technicians rather than licensed electricians. The switch automatically performs cable integrity testing, negotiates power requirements through handshake protocols, and activates power delivery without manual intervention for safety inspections

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The switch performs preliminary cable integrity testing and safety checks before activating AC power delivery. The system pre-negotiates power requirements through handshake operations and continuously monitors cable conditions, eliminating the need for post-installation inspections by licensed electricians

Inventive Principle:

Principle #10Preliminary action

3Power

If AC power is provided over Ethernet without cable integrity testing, then power delivery capability is improved, but safety hazards increase due to potential cable failures and improper connections

Engineering Contradiction:

Improvepower delivery capabilityVSAvoidsafety hazards

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The system implements continuous feedback mechanisms where the switch monitors cable integrity through impedance measurements and current sensing elements in real-time. The system adjusts or terminates power delivery based on feedback from safety checks, ensuring hazardous conditions are detected and corrected immediately

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The switch performs preliminary safety checks and cable integrity testing before activating AC power delivery. The system proactively prevents hazardous conditions by detecting improper connections, cable damage, or unauthorized devices before high-power AC electricity is applied to the network infrastructure

Inventive Principle:

Principle #9Preliminary anti-action

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 safe and scalable AC power distribution over computer networks, eliminating the requirement for licensed electricians by using protection circuitry and continuous monitoring to ensure cable integrity and safety, thus integrating AC power into network installations.

Implementation Method 1

The cable tester can include a time-domain reflectometer, or similar mechanism, to detect a balanced and properly terminated load connected to the remote end of the cable

Methodology Applied

Scientific EffectTime-domain reflectometry: