Chair of Power Electronics

Electric Drives

Lecturer:

Prof. Dr.-Ing. Marco Liserre and staff

Target group:

Students of the master courses “Electrical and Information Engineering” and “Electrical and Information Engineering and Business Management”

Recommended prerequisites:

Introduction to electrical energy technology, Power Electronics I, Control Systems I



Credits:

3 SWS (2 SWS lecture, 1 SWS exercise), 4 ECTS
English (lecture), English/German (exercises)

Content:

Electric drives are a key technology for reducing energy consumption of industrial processes, for modern wind energy power generation and for enabling green-transportation (electric and hybrid vehicles, electric trains, more electric ships and airplanes). Moreover electric drives are starting to be widespread making easier everyday life with automation and robotics. The course starts from a deep modeling phase of ac electrical machines, nowadays the most used. Then the field oriented control of the asynchronous and synchronous (Permanent Magnet) machines are treated in details due to their wide use and importance in modern electric drives. Design examples and applications complete the course with a problem solving approach involving the students. Exercises are carried out with CAE-tools (Matlab/Simulink).

Topics overview:

  • Space vector representation of electrical machines
  • Dynamic model of the synchronous machine
  • Dynamic model of the asynchronous machine
  • Overview of PWM modulation
  • Overview of Current Control techniques
  • Vector control of the permanent magnet synchronous machine: Current control loop and Speed control loop
  • Vector control of the asynchronous machine: Flux observer
  • Sensor-less operation
  • Design example in industrial drives
  • Design Example in wind energy
Literature:

Ned Mohan, “Electric Machines and Drives: A First Course”, Wiley 2012.

Werner Leonhard, “Control of electric drives”, Springer 2001.

Research

  • Our research is focused on the design of high efficient and reliable PWM-based power converter architectures (single-cell, multi-cell, multilevel), their modelling and control to exploit commercial as well as new power semiconductor devices with minimum over design.
    We develop controllers for electric drives and we are particularly skilled in the integration of renewable energy systems into the electric grid.
    Please discover our expertise looking to our recent projects.

    HEART - The Highly Efficient And Reliable smart Transformer
    Further Research Projects

Location