Syllabus

Module1: Performance factors of power electronic systems. Design objectives for power electronic converters. Reliability requirements in typical power electronic applications. Reliability engineering in power electronics. Physics of failure of power electronic components. DFR of power electronic converter systems. Accelerated testing concepts in reliability engineering. [4 hrs]

Module 2: Anomaly detection and remaining life prediction for power electronics. Failure models. Time-dependent dielectric breakdown models. Energy-based models. Thermal cycling models. FMMEA to identify failure mechanisms. Data-driven methods for life prediction. [7 hrs]

Module 3: Lifetime modelling and prediction of power devices. Failure mechanisms of power modules. Burnout failures. Lifetime metrology: Lifetime and availability, Exponential distribution, Weibull distribution. Redundancy. Lifetime modelling and design of components: Lifetime prediction based on mission profiles, modelling the lifetime of systems with constant failure rate, modelling the lifetime of systems submitted to low-cycle fatigue. Wear-out status of Power modules: On-state voltage measurement method, Current measurement, temperature measurement. Voltage evolution in IGBT/MOSFET and diode: Application of Vce,on monitoring, Degradation and failure mechanisms, Post-mortem investigation. Chip temperature estimation, Processing of state monitoring data. [12 hrs]

Module 4: Reliability of DC-link capacitors in power electronic converters. Failure mechanisms and lifetime models of capacitors. Reliability-oriented design for DC links. Condition monitoring of DC-link capacitors. Capacitor life analysis: Aluminum electrolytic capacitors, Os-con type capacitors. [4 hrs]

Module 5: Active thermal control for improved reliability of power electronics systems. Thermal stress and reliability of power electronics. Concept of active thermal control for improved reliability. Modulation strategies for achieving better thermal loading. Reactive power control achieving better thermal cycling with case studies. Thermal control strategies utilizing active power. Impacts of active power to the thermal stress. Reliability Case studies in different Power Electronics converter system applications like, Renewable Energy System, Electric Vehicle, Power supplies of computers etc. [6 hrs]

Explain the concept of reliability and its importance in Power electronics Converter system.

To provide the students a deep insight in to the anomaly detection of power electronics converters and its failure models.

To expose students for life time modelling, life time prediction of power converter modules along with its components like semiconductor switches, capacitors etc.

To understand reliability with case studies in various Power Electronics converter dominated system like Renewable Energy System, Electric Vehicle, Power supplies of computers etc

At the end of the course, students will be able to
CO1: Understand the basics of reliability and its importance in Power Electronics Converter
System.
CO2: Develop a deep insight in to the anomaly detection power electronics converters and its
failure models.
CO3: Design and develop Life time model and life time prediction model of power converter
modules, Semiconductor switches, capacitors etc
CO4: Develop active thermal control for improved reliability of power electronics systems
CO5: Analyse the reliability in various power conversion system with case studies and its
challenges.

Henry Shu-hung, Wang Huai Blaabjerg, Frede, Pecht Michael, Reliability of Power Electronic Converter Systems, IET, 2015

Kaboli, Shahriyar, Reliability in Power Electronics and Electrical Machines: Industrial Applications and Performance Models: Industrial Applications and Performance Models, IGI Global, 2016

Roy Billinton, Ronald N. Allan, Reliability Evaluation of Engineering Systems: Concepts and Techniques, Springer, 1992

2. Ahteshamul Haque, Frede Blaabjerg et al, Reliability of Power Electronics Converters for Solar Photovoltaic Applications, IET, 2021

Saeed Peyghami, Frede Blaabjerg, "Availability Modeling in Power Converters Considering Components Aging", IEEE Transactions on Energy Conversion, vol.35, no.4, pp.1981-1984, 2020

S. Peyghami, Z. Wang and F. Blaabjerg, "A Guideline for Reliability Prediction in Power Electronic Converters," in IEEE Transactions on Power Electronics, vol. 35, no. 10, pp. 10958-10968, Oct. 2020.