course: Electric Drives

teaching methods:
lecture with tutorials
computer based presentation, black board and chalk
responsible person:
Prof. Dr.-Ing. Volker Staudt
Prof. Dr.-Ing. Volker Staudt (ETIT)
offered in:
winter term

dates in winter term

  • start: Wednesday the 13.10.2021
  • lecture Wednesdays: from 10:15 to 11.45 o'clock in ID 04/445
  • tutorial Thursdays: from 12:15 to 13.45 o'clock in ID 04/445


Die Angaben zu den Prüfungsmodalitäten (im WiSe 2020/2021 | SoSe 2021) erfolgen vorbehaltlich der aktuellen Situation. Notwendige Änderungen aufgrund universitärer Vorgaben werden zeitnah bekanntgegeben.

Date according to prior agreement with lecturer.

Form of exam:oral
Registration for exam:FlexNow


The students acquire solid interdisciplinary knowledge and extended know-how concerning the selection and modeling of electric machines. This includes knowledge of mechanical aspects and dedicated control theory as well as technologies to acquire the needed measuring signals. Practical aspects, specially concerning the combination of mechanical load and electric machine, are learned. The students understand the selection of appropriate machines for certain applications and know how to describe these mathematically. This gives a solid basis for subsequent lectores on the control of machines and system-wide analysis of drive systems.


This lecture concentrates on those aspects of electric drives which are relevant for control and design of drive systems. A mathematical description of electrical machines resulting from physical principles and tailored to control and system analysis is one of the main topics. A second major topic is the integration of electric machines into drive systems, taking into account the demands resulting from the mecahnical components of the drive system, especially the mechanical load. For this, space vectors as a very suitable mathematical tool are introduced. Construction principles of stator and rotor, including winding arrangements and permanent magnets, are discussed, leading to the principle of torque generation. On this basis the operating principle of relevant electric machines is developed. Mathematical description as well as suitable equivalent circuit diagrams result. Basic power-electronic circuits which are relevant for the control of electric machines are discussed and described by a suitable mathematical approximation. Finally, the interaction of a drive system with its environment is analysed. This includes aspects of process control, losses, cooling, reasons for failures and associeated protection. Electrick machine and mechanical load have to match. Targeted realization is also of high importance: The balance between effort, need and advantages is very relevant, cost effective solutions are required.



recommended knowledge

*Basic knowledge of electric machines and power electronics *Solid konwledge of mathematics, specially concerning differential equations and state-space notation *Basic knowledge of Bode diagrams *Basic knowledge of control theory


Students whose examination Regulations or Examination Office foresee a sixth credit point for this subject can take part in an additional exam that justifies and examines the workload required for the sixth point. Please speak with your examination office if necessary. It is not possible for ET/IT students as the module handbook provides for a total of five credits.

The place and time the additional exam takes place is to be determined.