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Power converters and systems

The developments of power converters and systems are driven by three mega trends:

  • Intelligent Power Electronics (Industry 4.0, Artificial Intelligent Condition monitoring)
  • Electrification of transportation
  • New materials as GaN and SiC as an enable for the new applications

Industry 4.0 combines the information technology, that has been strongly developed during the last 20 years, with industrial electronics building the bridge from only information to hardware and products. This includes the topics internet of things, big data and automatization but also energy efficiency, reliability and the integration of renewables.

Electrification of transportation is not limited to electrical vehicles but covers also the charging infrastructure, autonomous cars and electrification of ships, airplanes and off-road vehicles.

The enablers for these mega trends are the new materials in power electronics, that allow much more efficient energy transformation and thereby significant more compact designs allowing power electronics in applications that have not been possible before due to space losses and costs.

Research scope

Our drivers are the new opportunities that arise from the rapid developments in the fields of digitalization and new power semiconductors. These two mega trends provide many possibilities for new applications and solutions. We strive for covering the whole chain from components via systems towards the application and solution. On component level we are developing, analyzing components always with the focus on reliability and life-time prediction. On system level we aspire to utilizing the components in the most efficient way by developing new topologies, applying new and advance control strategies that are enabled by the rapid developments in the field of calculation power. On application level we combine information technologies with hardware to contribute in the development of internet of things. All this is supported by utilizing the new measures of simulation.

Research Topics

  • Optimal topologies for high speed drives
    • 3 level topologies and/or WBG devices
    • Control strategies
    • EMC challenges
    • Power density
    • Current measurement
  • Optimal topologies for high power application
    • 3 level topologies and/or WBG devices
    • Control strategies
    • EMC challenges
    • Power density
    • Current handling
  • Failure mechanism of  WBG device
    • Find failure
    • Understanding the failure mechanism of  WBG device
    • Reliability testing

Additional competences:

  • PV systems
  • Wind systems
  • Semiconductor physics
  • Simulation
  • Automotive
  • Power modules and packaging
  • Reliability testing
  • Power to X

Research group


Find selected projects here:

  • Computer based design of power converters, Read more
  • High Speed Drive, Read more
  • Industriel Elektronik Innovation (IEI) ePowerDrive, Read more
  • Industriel Elektronik Innovation (IEI) GearDrivePlatform, Read more
  • PE:Region, Read more
  • PE:Region Platform, Read more
  • Waste Batterie, Read more
  • Development and construction of an automated motor test bench


Find latest publications here:

  • The Impact of Optimizers for PV-Modules, Franke, T., 22. Jan 2020, 24 p., Read more
  • Kapino, G., Ebel, T., & Franke, T. (2019). Comparison of Three-Phase Voltage Source Converter Topologies for Electric High-Speed Drives Application. In Proceedings of the 21st European Conference on Power Electronics and Applications (EPE'19 ECCE Europe) IEEE., Read more
  • Kapino, G. & Franke, T., (2019). Loss Comparison for Different Technologies of Semiconductors for Electrical Drive Motor Application.   2019 IEEE 13th International Conference on Compatibility, Power Electronics and Power Engineering, CPE-POWERENG 2019. IEEE, 5 p. (International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG), Read more



Assoc. Prof. Wulf-Toke Franke Tel. +4565509042 /

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Last Updated 17.12.2020