Pulse Power Synchronization for Long-Range High-Power Ethernet
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional Power over Ethernet (PoE) systems are limited in power capacity and range, often requiring local power sources for devices that need more than 100 W, especially in environments where AC grid power is not available or cost-effective, and there is a need for safe and efficient delivery of higher power over extended distances.
Innovation Solution
A system for delivering high power over data systems using pulse power with fault detection and safety protection, including low and high voltage initialization processes, multi-phase pulse power, and continuous power delivery, along with safety checks to ensure safe operation and fault detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional PoE systems are used to deliver power over cables, then power can be delivered to devices within a range of a few meters to about one hundred meters, but the power capacity is limited and inadequate for many classes of devices requiring more than 100 W
Solution Approach 1:
The patent employs pulse power delivery where power is transmitted in periodic pulses rather than continuous flow. The system uses pulsed voltage signals with controlled duty cycles to deliver high power over extended distances. This periodic action allows the cable to recharge during off-pulse periods and discharge during pulse periods, enabling power delivery beyond conventional PoE limits while maintaining safety standards.
Solution Approach 2:
The system dynamically changes voltage and current parameters during operation. It uses variable voltage levels (e.g., 48V nominal with pulses up to 100V peak) and adjustable current limits based on cable conditions, device requirements, and safety margins. This parameter flexibility allows optimization of power delivery for different scenarios while adapting to varying cable lengths and device power needs.
2Length of stationary object
If fiber optic cables are used to extend distance, then greater distance can be achieved, but power must be supplied through a local power source such as a wall outlet due to limitations with conventional PoE
Solution Approach 1:
The patent segments the power delivery function across multiple components: the PSE provides pulsed power output, the cable acts as both data and power medium, and the PD includes power management circuitry. This segmentation allows the system to extend power delivery distance by dividing the power delivery task across the entire link rather than relying on a single continuous power source, enabling power delivery over distances that would otherwise require intermediate power sources.
Solution Approach 2:
The system makes the data cable serve dual functions: data transmission and power delivery. By integrating power delivery capability into the existing data cable infrastructure, the system eliminates the need for separate power sources or additional cabling, reducing device complexity while extending operational distance beyond conventional PoE limits.
3Power
If higher power is delivered over extended cable lengths, then more devices can be powered remotely, but safety concerns arise regarding cable capacitance and potential shock hazards
Solution Approach 1:
The system performs preliminary safety checks before enabling full power delivery. It measures cable capacitance during initialization, evaluates the cable's power handling capability, and establishes safe operating parameters in advance. This preliminary action prevents safety hazards by ensuring the cable can safely handle the intended power levels before high power is applied.
Solution Approach 2:
The system continuously monitors power delivery conditions and provides feedback to adjust operation. It measures cable voltage, current, and power levels in real-time, comparing against safety thresholds and adjusting pulse parameters accordingly. This feedback mechanism prevents unsafe conditions by automatically reducing or stopping power delivery when safety limits are approached, eliminating shock hazards while maintaining optimal power delivery.
Data Source
AI summary
In one embodiment, a method includes receiving low voltage pulse power from power sourcing equipment at a powered device, synchronizing the powered device with a waveform of the low voltage pulse power received from the power sourcing equipment, and operating the powered device with high voltage pulse power received from the power sourcing equipment.