PoE Power Supply System with Switchable Connection State
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Solution Overview
Problem
In Power over Ethernet (PoE) systems, when an abnormality occurs in the power reception device, the power supply device stops supplying power, leading to delayed resumption of operation even after the abnormality is resolved, as existing systems lack a mechanism for immediate power restoration upon request.
Innovation Solution
A PoE power supply system with a switchable connection state between power supply and standby modes, where a request switch can initiate power resumption by sending a signal to the power supply device, allowing for immediate restoration of power when the abnormality is corrected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply device stops supplying power when an abnormality occurs in the power reception device, then safety and reliability are improved, but the downtime and loss of time increase because power cannot be resumed immediately even after the abnormality is corrected
Solution Approach 1:
The patent applies the Dynamics principle by making the connection state of the power supply device switchable between two modes: a power supply state where power is actively supplied, and a standby state where the device can receive power supply request signals. This dynamic switching capability allows the system to transition from a static always-on or always-off state to a flexible state that can adapt based on operational needs and abnormality conditions, thereby resolving the contradiction between safety (stopping power during abnormalities) and downtime (enabling quick resumption when abnormalities are corrected).
2Loss of time
If the power supply device maintains a standby state ready to receive power supply request signals, then the loss of time is reduced by enabling immediate power restoration, but the use of energy increases due to continuous monitoring and readiness
Solution Approach 1:
The patent applies the Periodic action principle by implementing a standby state where the power supply device periodically monitors for power supply request signals rather than continuously maintaining full power supply readiness. This periodic monitoring approach allows the device to remain in a low-power state while still being capable of immediately resuming power supply when a request signal is detected, thus resolving the contradiction between minimizing downtime and reducing energy consumption during standby operations.
3Productivity
If the connection state is switched to power supply state upon receiving a power supply request signal, then productivity is improved by reducing downtime, but the device complexity increases due to the need for state management and signal processing mechanisms
Solution Approach 1:
The patent applies the Taking out (Extraction) principle by separating the power supply control function into distinct operational states (power supply state and standby state) and extracting the state switching logic as a独立 control mechanism. This extraction allows the complex state management to be handled through simple, well-defined transitions triggered by power supply request signals, thereby resolving the contradiction between improving productivity through quick state switching and managing device complexity through modular, state-based control architecture.
Data Source
AI summary
A PoE power supply system includes a cable, a power supply device, a power reception device, and a request switch. The power supply device includes a power supply block and a power supply control block. The power supply block is configured to enable a connection state between the power supply device and the cable to be switched. The connection state includes a power supply state in which the power supply device is supplied with power required for operating the power supply device via the cable, and a standby state in which the power supply request signal is receivable by the power supply device via the cable. The power supply control block is configured to switch the connection state to the power supply state in response to receiving a power supply request signal output from the request switch and requesting the power supply device to resume supplying the power.