AC Circuit Theory


Recommended prerequisite for participation in the module

The module is based on knowledge achieved in the module Introduction to electrical engineering or similar.

Content, progress and pedagogy of the module

Learning objectives


  • Have an understanding of:
    • Basic steady-state analysis of AC circuits
    • Basic steady-state power analysis of AC circuits
    • The concepts of mutual inductance, coupling coefficients, the ideal transformer and turns ratio
    • Characteristics for balanced three phase circuits
    • Basic three-phase star and delta-connections
    • Variable frequency behaviour for basic R, L and C circuits
    • Characteristics of basic filters: Low pass, high pass, band pass and band stop
    • Various types of circuit functions
    • Definition of poles and zeros
    • Laplace domain representation of basic circuit elements (including initial conditions): R, L and C
    • Characteristics of diodes and passive single-phase and three-phase rectifiers
    • Fourier techniques for circuit analysis


  • Be able to perform calculations of currents and voltages in steady-state AC circuits
  • Be able to perform steady-state power analysis of AC circuits
  • Be able to perform calculations on magnetically coupled circuits
  • Be able to calculate voltages, currents, powers and power factors in three-phase circuits
  • Be able to perform Bode plot and frequency analysis for variable-frequency circuits
  • Be able to perform circuit analysis using Laplace transformation
  • Be able to design single phase and three phase diode rectifiers
  • Be able to perform Fourier analysis of periodic signals in electrical circuits


  • Be able to handle simple development-oriented situations in connection with technical issues of AC circuits in study or work relations
  • Be able to perform laboratory work, data collection and analyse the results of AC circuits in study and work relations

Type of instruction

Lectures with exercises, possibly supplemented with e-learning activities.

Extent and expected workload

Since it is a 5 ECTS course, the work load is expected to be 150 hours for the student.



Name of examAC Circuit Theory
Type of exam
Written or oral exam
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-kredsløbsteori
Module codeN-EN-B3-2AZ
Module typeCourse
Duration1 semester
Language of instructionEnglish
Empty-place SchemeYes
Location of the lectureCampus Aalborg, Campus Esbjerg
Responsible for the module


Study BoardStudy Board of Build, Energy, Electronics and Mechanics in Esbjerg
DepartmentDepartment of Energy
FacultyThe Faculty of Engineering and Science