Power Supply Apparatus Automatic End Portion Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing techniques for controlling multiple power supply apparatuses connected to a common communication line lack usability and efficiency, particularly in determining the connection status to the end portion of the line and setting unique identifiers.
Innovation Solution
A power supply apparatus with a communication interface and controller that transmits presence signals and receives identifier signals from other apparatuses, determining its connection status and setting unique identifiers by connecting or disconnecting a terminating resistor, thereby improving communication line usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual configuration of connection status and unique identifiers is performed for each power supply apparatus, then proper communication line configuration can be achieved, but the complexity of operation and installation increases significantly
Solution Approach 1:
Each power supply apparatus automatically detects its own connection status on the communication line and assigns its own unique identifier without requiring manual configuration. The apparatus transmits presence signals and receives responses to autonomously determine whether it is connected at an end portion or intermediate portion of the communication line, thereby eliminating the need for manual setup while ensuring proper configuration.
Solution Approach 2:
The power supply apparatus performs preliminary detection of connection status and assignment of unique identifiers during the initial power-on phase, before any operational commands are exchanged. This preliminary automatic configuration ensures that the communication line is properly set up before actual power supply operations begin, preventing configuration errors.
2Extent of automation
If presence signals are transmitted and received to determine connection status, then automatic configuration is achieved, but the communication protocol complexity increases
Solution Approach 1:
The communication protocol uses uniform presence signals with the same data format and transmission method for all power supply apparatuses on the communication line. Each apparatus uses the same signal structure to indicate its presence and receives responses in the same format, simplifying the protocol design while enabling automatic detection of connection status through consistent signal exchange.
3Reliability
If terminating resistors are automatically connected or disconnected based on detection, then proper signal termination is achieved, but the control system complexity increases
Solution Approach 1:
The terminating resistor connection state is dynamically adjusted based on the detected connection status of the power supply apparatus. When an apparatus detects that it is connected at an end portion of the communication line, it automatically connects its terminating resistor; when detected at an intermediate portion, it disconnects the terminating resistor. This dynamic adaptation ensures proper signal termination without requiring complex static control systems.
Data Source
AI summary
A power supply apparatus is connectable to a common communication line together with at least one other apparatus. The power supply apparatus includes a communication interface and a controller. The communication interface is configured to transmit a signal indicating the presence of the power supply apparatus to a first apparatus connected to the power supply apparatus among the at least one other apparatus and to receive a signal indicating the presence of a second apparatus from the second apparatus connected to the power supply apparatus among the at least one other apparatus. The controller is configured to determine whether the power supply apparatus is connected to an end portion of the common communication line, based on whether the communication interface has received the signal indicating the presence of the second apparatus.