Optical Transceiver Power Delivery With Low-Voltage Fault Interlock
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Solution Overview
Problem
Conventional Power over Ethernet (PoE) systems are limited in power delivery capacity and range, requiring fiber optic cables for longer distances and local power sources for higher power needs, with inadequate power delivery for many devices and increased installation complexity.
Innovation Solution
A high power over data system with fault detection and safety protection, using a low voltage safety check combined with digital interlock for feedback, and pulse power systems with line-to-line and line-to-ground fault detection, enabling safe operation and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional PoE systems are used for power delivery, then power can be delivered over data cables, but the power delivery capacity is limited and range is restricted to about 100 meters
Solution Approach 1:
The patent employs pulse power delivery with periodic on/off cycles. The power is delivered in controlled pulses rather than continuously, allowing for periodic fault detection between pulses. This periodic action enables extended power delivery distance while maintaining safety through intermittent monitoring and protection cycles.
Solution Approach 2:
The system implements digital interlock feedback mechanisms where fault detection results from previous pulses feed back into control decisions for subsequent pulses. This feedback loop allows the system to adapt power delivery based on real-time conditions, enabling extended range while maintaining safety through continuous monitoring and adjustment.
2Power
If higher power delivery is needed beyond conventional PoE capacity, then local power sources are required, but installation complexity increases
Solution Approach 1:
The patent merges power delivery and data communication into a single cable infrastructure. By combining high-voltage power signals with data communication over the same twisted pair cables, the system eliminates the need for separate power sources and reduces installation complexity while delivering power beyond conventional PoE limits.
Solution Approach 2:
The system makes the data cable universal by enabling it to carry both data signals and high-voltage power signals simultaneously. This multi-functionality allows existing data infrastructure to be used for power delivery, eliminating the need for additional power sources and reducing overall system complexity.
3Power
If high voltage pulse power is used for extended power delivery, then power capacity increases, but safety risks from electrical shock and faults increase
Solution Approach 1:
The system performs preliminary fault detection at low voltage before applying high voltage pulses. By checking for faults in advance and establishing a safe operating state beforehand, the system prevents dangerous conditions from developing, enabling high power delivery while mitigating safety risks through proactive protection.
Solution Approach 2:
The system uses fault conditions that would normally be harmful as detection opportunities. By detecting faults through controlled low-voltage testing before high-voltage application, and using fault signals to trigger protection mechanisms, the system converts potential harmful events into beneficial safety features that prevent actual damage.
4Reliability
If fault detection is implemented in high power systems, then safety is improved, but system complexity increases
Solution Approach 1:
The system performs self-diagnosis through automated fault detection between power pulses. The digital interlock mechanism automatically monitors for faults and makes protection decisions without requiring external intervention, improving safety while minimizing the need for additional complex monitoring infrastructure.
Solution Approach 2:
The fault detection system uses feedback from previous pulse cycles to control subsequent power delivery. By using the outcomes of automated monitoring to adjust power delivery in real-time, the system achieves high safety levels through relatively simple monitoring circuitry that leverages existing communication infrastructure.
Data Source
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AI summary
In one embodiment, a method includes receiving power at an optical transceiver module at a remote network device on a cable delivering power and data from a central network device, operating the remote network device in a low voltage startup mode during fault sensing at the remote network device, transmitting on the cable, a data signal to the central network device, the data signal indicating an operating status based on the fault sensing, and receiving high voltage power from the central network device on the cable at the remote network device upon transmitting an indication of a safe operating status at the remote network device, wherein the remote network device is powered by the high voltage power. An apparatus is also disclosed herein.