Power Supply Circuit Switch Module for Reverse Voltage Isolation
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Solution Overview
Problem
In FTTdp networks, supplying power to distribution points is challenging due to the risk of reverse voltage transmission to terminal devices, which can damage them if no protective measures are taken.
Innovation Solution
A power supply circuit and panel that include a switch module, control module, isolation module, and service backhaul module to automatically switch power lines and prevent reverse voltage transmission to terminal devices, ensuring safe and normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a power supply module is connected to supply power to the distribution point, then the distribution point can be supplied with power, but the reverse voltage is transmitted to terminal devices which may be damaged
Solution Approach 1:
The circuit is divided into separate segments: a power supply segment (power supply module and distribution point) and a terminal device segment, with the switch module acting as a segmentation boundary that can isolate these segments to prevent harmful voltage transmission while allowing power supply when needed
Solution Approach 2:
The switch module serves as an intermediary component between the power supply module and terminal devices. It mediates the electrical connection, allowing power to reach the distribution point while blocking reverse voltage from reaching terminal devices through intelligent switching control
2Power
If the switch module connects the power supply module to the distribution point, then power can be supplied, but the terminal devices are isolated from services
Solution Approach 1:
The circuit topology is made dynamic through the switch module, which can change connection states based on operational requirements. The system dynamically switches between power supply mode (isolating terminal devices from power) and service transmission mode (connecting terminal devices to distribution point services)
Solution Approach 2:
The system employs periodic or conditional switching actions where the switch module alternates between connecting power supply and service transmission paths based on detected conditions, ensuring that power is supplied when needed while maintaining service connectivity at other times
3Device complexity
If no protective measures are taken, then the circuit is simple, but terminal devices may be burned out due to reverse voltage
Solution Approach 1:
Protective switching actions are taken in advance before reverse voltage can damage terminal devices. The control module monitors voltage conditions and activates the switch module to isolate terminal devices preemptively, preventing damage before it occurs
Solution Approach 2:
The switch module provides a protective buffer or cushion between the power supply module and terminal devices. This intermediary protection is established beforehand to absorb or block harmful reverse voltage, cushioning terminal devices from potential damage
Data Source
AI summary
Embodiments of the present invention provide a power supply circuit and panel. The power supply circuit includes: a power supply module (10), a switch module (20), which is separately connected to the power supply module (10), a terminal device, and the distribution point, and is connected to the distribution point and the terminal device when the distribution point does not need to be supplied with power, and is connected to the power supply module (10) and the distribution point when the distribution point needs to be supplied with power; a control module (30), an isolation module (40) and a service backhaul module (50), which is separately connected to the isolation module (40) and the terminal device, and outputs the external service to the terminal device when the distribution point needs to be supplied with power. The embodiments of the present invention further provide a power supply panel.