AC Motor Drives: Converters and Control


Recommended prerequisite for participation in the module

This module is based on knowledge gained on 1st Semester of the MSc programme in Electro-Mechanical System Design.

Content, progress and pedagogy of the module

Learning objectives


  • Have gained knowledge of methods for electro-mechanical energy conversion by means of three-phase AC machines
  • Have gained knowledge of the construction and the operating principles for induction machines and for three-phase sine-wave brushless machines
  • Understand the stationary performance characteristics for such machines
  • Have a solid understanding of stationary and dynamic models of AC machines
  • Have gained a solid understanding of basic methods for speed control of AC machines using power electronic converters
  • Have gained a basic understanding of high-performance torque control methods based on vector-control principles
  • Have gained knowledge of power electronic converters for AC drives
  • Have knowledge of dynamic models of power converters
  • Understand the principle of three-phase pulse-width modulation (PWM) for three-phase systems and being able to apply PWM as part of an AC motor control loop


  • Be able to explain the operating principles for induction and brushless machines
  • Be able to apply equivalent circuit diagrams for stationary performance analysis
  • Be able to measure motor parameters using standard tests
  • Be able to make dynamic models of AC machines using space-vector models in stationary and rotating coordinates
  • Be able to design and to simulate simple scalar control techniques for AC machines based on stationary performance characteristics
  • Be able to understand field-oriented control techniques and to apply these for high-performance AC drives
  • Be able to design a pulse-width modulator using both carrier-based and space-vector based approaches
  • Being able to analyse and to model single- and three-phase power converters taking component voltage drops and blanking effects into account


  • Have the ability to analyse, model and simulate the stationary and dynamic characteristics for an AC motor drive based on both induction and permanent-magnet machines
  • Be able to design a complete AC motor control system using either classical V/Hz techniques or high-performance vector-control techniques based on field-orientation and instantaneous current control

Type of instruction

The teaching is organized in accordance with the general form of teaching. Please see the programme cirruculum §17.

Extent and expected workload

Since it is a 5 ECTS course module the expected workload is 150 hours for the student.



Name of examAC Motor Drives: Converters and Control
Type of exam
Written or oral exam
Permitted aidsInformation about allowed helping aids for the examination will be published in the description of the semester/module.
Assessment7-point grading scale
Type of gradingInternal examination
Criteria of assessmentThe criteria of assessment are stated in the Examination Policies and Procedures

Facts about the module

Danish titleAC motor drev: konvertere og regulering
Module codeN-EMSD-K2-4
Module typeCourse
Duration1 semester
Language of instructionEnglish
Empty-place SchemeYes
Location of the lectureCampus Aalborg
Responsible for the module


Education ownerMaster of Science (MSc) in Engineering (Mechanical Engineering)
Study BoardStudy Board of Energy, Study Board of Mechanical Engineering and Physics
DepartmentDepartment of Energy
FacultyThe Faculty of Engineering and Science