Events at Department of Energy Technology

Industrial/PhD Course: Capacitors in Power Electronics Applications


04.11.2021 kl. 08.30 - 05.11.2021 kl. 15.30



Professor Huai Wang,, Aalborg University, Denmark


Professor Huai Wang,  Aalborg University, Denmark
Assistant Professor Haoran Wang,  Aalborg University, Denmark

ECTS:   2 


Capacitors are one of the key components in typical power electronic systems in terms of cost, volume, and reliability. Power electronics applications are consuming unprecedented quantities of electrolytic capacitors, film capacitors, and ceramic capacitors. This industrial/PhD course will discuss the sizing, modeling, and reliability analysis of capacitors from an application perspective, focusing on both classical and emerging power electronics applications.  It is the latest research outcome of several PhD projects and industrial collaboration activities.  The course will cover the following aspects:  

  1. Basics of capacitors and its functions in power electronic converters  
  2. Emerging capacitor technologies and latest developments  
  3. Capacitor sizing criteria in power electronics by considering steady-state performance, transient and stability performance under both normal and abnormal operations 
  4. Reliability of electrolytic capacitors, film capacitors, and ceramic capacitors 
  5. Mission profiled based electro-thermal-lifetime modeling of capacitors 
  6. Condition monitoring and protection of capacitors in power electronics applications 
  7. Capacitor minimization techniques in power electronic systems 
  8. Case studies in DC-DC converters, Modular Multi-Level Converters (MMC), photovoltaic inverters, wind power converters, adjustable-speed-drives, Solid-State-Transformers (SST), and ultra-low inductive capacitor bank design.    

Day 1 – I​ntroduction to capacitors and its electro-thermal-lifetime modeling and accelerated testing (Lecturer: Huai Wang, 08:30 – 16:30)  

  • L1 Basics of capacitors and emerging capacitor technologies  
  • L2 Electro-thermal-lifetime modelling of capacitors 
  • Exc 1 Mission profile based capacitor lifetime modelling  
  • Lab 1 Capacitor thermal characterization 
  • L3 Accelerated degradation testing of capacitors 
  • Exc 2 Step-by-step capacitor lifetime data analysis  
  • L4  Capacitor condition monitoring 

Day 2 – Capacitor sizing in power electronic applications (Lecturer: Haoran Wang, 08:30 – 15:30) 

  • L5 Capacitor sizing criteria in power electronics  
  • L6 Active capacitors with semiconductor circuits 
  • L7 Capacitor application case studies 
  • Exc 3 Step-by-step capacitor sizing for a power converter with specified reliability specifications 


Basic understanding of power electronics circuits and control  

Form of evaluation:  

Case study exercise, lab measurement, and report submission 


6000 DKK for PhD students outside of Denmark and 8000 DKK for the Industry.


AAU Energy


Aalborg University, Pontoppidanstræde 101, room 1.011+1.015, 9220 Aalborg East

Registration Deadline

14.10.2021 kl. 00.00

More information