Ethernet Power Switching for Stable Adapter-Free Output
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Solution Overview
Problem
Ethernet power supply devices face challenges in providing stable power to devices when an adapter power supply is absent, as existing solutions lack efficient mechanisms to switch between multiple power sources with varying voltage levels from Ethernet connections.
Innovation Solution
The Ethernet power supply device employs multiple switches and a processor to detect the absence of an adapter power supply, generating power supplies from Ethernet connections with different voltage levels and controlling the switches to prioritize and combine these power sources for stable output, utilizing PWM controllers, transformers, and diodes to manage voltage and current levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple switches with different voltage levels are used to provide power supply, then the adaptability and power supply flexibility are improved, but the device complexity increases due to the need for multiple switches and control mechanisms
Solution Approach 1:
The patent implements dynamic power supply switching by enabling the processor to dynamically select between different power sources (first power supply from first Ethernet connection, second power supply from second Ethernet connection, or adapter power supply) based on real-time detection of power availability and voltage levels. This dynamic adaptation allows the system to maintain optimal power supply without requiring complex static circuit design for all possible power scenarios.
Solution Approach 2:
The processor acts as an intermediary control unit that manages the complexity of coordinating multiple power sources. It detects the presence and status of different power supplies, determines the optimal power source based on voltage levels and availability, and controls the switching between power sources. This centralized intelligence simplifies the overall system architecture compared to using complex hardware-based switching circuits.
2Stability of the object's composition
If voltage level matching between power supplies is required, then the power supply stability is improved, but the response time and productivity are reduced due to detection and switching delays
Solution Approach 1:
The system performs preliminary detection of power supply status and voltage levels before actual power switching is needed. The processor continuously monitors the availability of adapter power supply and the status of Ethernet-based power supplies in advance, so when a switching event is required, the decision has already been made and can be executed immediately, minimizing actual switching delay.
Solution Approach 2:
The patent implements a feedback mechanism where the processor continuously detects the presence and voltage levels of different power supplies, and based on this real-time feedback, dynamically adjusts the power source selection. This closed-loop control ensures stable power supply by constantly monitoring conditions and making adjustments as needed, while the fast detection capability maintains high switching speed.
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
Ensures stable power output to devices even when an adapter is removed, allowing for hot backup operations without additional power switches or capacitors, improving reliability and efficiency compared to traditional solutions.
Implementation Method 1
a transformer and a first unit coupled to the PWM controller, the power output terminal and the connector
Implementation Method 2
Each of the switches includes a pulse width modulation (PWM) controller coupled to the Ethernet connection port
Data Source
AI summary
An Ethernet power supply device is provided. The Ethernet power supply device includes a first switch, a second switch, and a processor. When the first switch detects that there is no adapter power supply, the first switch generates a first power supply according to a first network power from a first Ethernet network connector port. When the second switch detects that there is no adapter power supply, the second switch generates a second power supply according to a second network power from the second Ethernet network connector port. When there is no adapter power supply and the first power supply and the second power supply are at the same power level, the processor provides a first control signal to control the first switch to provide the first power supply to a power output terminal as an output power supply.