Events at Department of Energy Technology

Industrial/PhD Course: Capacitors in Power Electronics Applications


19.11.2020 kl. 08.30 - 20.11.2020 kl. 16.00



Professor Huai Wang


Professor Huai Wang
Postdoc Haoran Wang

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 – Introduction 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.


Department of Energy Technology


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