A Condition Evaluation Simplified Method for Traction Converter Power Module Based on Operating Interval...

Area of Science:

• Electrical Engineering
• Power Electronics
• Reliability Engineering

Background:

• Assessing the condition of traction converter insulated gate bipolar transistor (IGBT) modules is critical for the reliable operation of urban rail vehicles.
• Existing simulation methods can be time-consuming, necessitating more efficient approaches for real-world applications.

Purpose of the Study:

• To propose an efficient and accurate simplified simulation method for evaluating IGBT module conditions in urban rail vehicles.
• To reduce simulation time and computational load while maintaining accuracy in state trend estimation.

Main Methods:

• Development of a condition evaluation framework using operating interval segmentation (OIS) based on power loss similarity between stations.
• Creation of a basic interval segmentation model using operating conditions to simplify the entire line's operational profile.
• Simulation and analysis of temperature and stress fields of IGBT modules within segmented intervals.

Main Results:

• The OIS method effectively reduces the number of simulations required for condition evaluation.
• The simplified approach accurately estimates the temperature and stress trends of traction converter IGBT modules across the entire operational line.
• Validation through comparison with actual test results confirms the method's effectiveness.

Conclusions:

• The proposed OIS method provides an efficient and accurate way to evaluate IGBT module condition in urban rail vehicles.
• This method enables a more reliable combination of lifetime calculation with actual operating conditions and internal stresses.
• The findings support further research into IGBT module fatigue mechanisms and lifetime assessment reliability.