Power Line Adapter Power Saving Mode Control
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Solution Overview
Problem
Conventional power line adapters waste significant power as they remain active even when no data is being transmitted, despite being connected to a power-line network, due to lack of conditions for entering a power-saving mode.
Innovation Solution
A power line adapter with a micro controller and switch circuit that monitors link and package signals to disconnect the DC supply voltage to the power line communication circuit when no data is being transmitted, enabling operation in a power-saving mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power line adapter remains always active to maintain network connectivity, then the network responsiveness is improved, but the power consumption increases significantly
Solution Approach 1:
The power line adapter dynamically adjusts its operational state between active and power-saving modes based on real-time detection of data transmission activity. The adapter monitors the power line for data signals and automatically transitions to a low-power state when no transmission is detected, while maintaining the capability to quickly resume active operation when data activity resumes, thus balancing connectivity reliability with energy efficiency
Solution Approach 2:
The adapter changes its operational parameters by switching between two distinct power states: a full-power active mode for data transmission and a reduced-power sleeping mode for idle periods. This parameter change is controlled by detecting the presence or absence of data signals on the power line, allowing the system to optimize power consumption while maintaining network availability
2Loss of energy
If the power line adapter enters power-saving mode to reduce power consumption, then the energy efficiency is improved, but the network responsiveness deteriorates
Solution Approach 1:
The adapter performs preliminary monitoring of the power line for data signals before transitioning to power-saving mode. By continuously detecting the presence or absence of data transmission activity, the system can proactively switch to low-power state when appropriate, and equally proactively resume active operation when data activity is detected, minimizing any potential delay in network responsiveness
Solution Approach 2:
The system implements a feedback mechanism where the adapter continuously monitors the power line for data signals and uses this information to control its operational state. The detection of data transmission activity provides feedback that triggers the transition from power-saving mode back to active mode, ensuring that the adapter responds promptly to network traffic while maintaining energy efficiency during idle periods
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
Significantly reduces power consumption by switching to a power-saving mode when no data is transmitted, achieving up to 80.83% power savings.
Implementation Method 1
the AC voltage received by the power plug 302 is first converted to a first DC voltage by the bridge rectifier 320
Implementation Method 2
the voltage level of the first DC voltage is further modulated by the power transformer 322
Data Source
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AI summary
A power line adapter and its controlling method to be operated in a power-saving mode are disclosed. The power line adapter includes a power-transmitting module for generating a DC supply voltage and a data-transmitting module for transmitting data. Furthermore, the data-transmitting module at least includes a power line communication circuit and an Ethernet physical layer transceiver. The controlling method comprises steps of: monitoring a link signal generated by the Ethernet physical layer transceiver when the power line adapter is operated in an active mode; and, disconnecting the DC supply voltage to the power line communication circuit and entering the power-saving mode if the link signal indicates a disconnection over a first time period.