Power Converter Output Misconnection Determiner
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Solution Overview
Problem
Power converters can suffer damage due to accidental misconnection to the system power supply, leading to overcurrent issues when converting DC power to AC power for household loads.
Innovation Solution
A power converter equipped with a voltage detector, current detector, and power conversion controller that determines misconnection by analyzing voltage and current levels, and stops power conversion to prevent overcurrent and potential damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power converter operates without misconnection detection, then power conversion efficiency is maintained, but switching elements may be damaged due to overcurrent from misconnection
Solution Approach 1:
The system performs preliminary detection of output terminal voltage before power conversion to identify misconnection conditions. By detecting voltage at the output terminal and comparing it against expected ranges, the system proactively identifies misconnections before they cause overcurrent damage to switching elements, preventing harm before it occurs.
Solution Approach 2:
The control system continuously monitors output terminal voltage and feeds this information back to the power conversion controller. Based on the feedback voltage level, the controller adjusts or stops power conversion to prevent misconnection damage, creating a closed-loop protection mechanism that responds dynamically to system conditions.
2Measurement precision
If voltage detection is performed continuously to detect misconnection, then misconnection detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The system performs voltage detection periodically at specific intervals rather than continuously. Voltage detection is triggered at predetermined timing points during operation, providing sufficient measurement precision for misconnection detection while significantly reducing energy consumption compared to continuous monitoring.
Data Source
AI summary
A power converter includes a power conversion controller configured to determine whether or not an output terminal is misconnected to a system power supply based on a current between a power converter and the output terminal and a voltage between the power converter and the output terminal, and to perform a control to stop power conversion in the power converter when determining that the output terminal is misconnected to the system power supply.