Authorised by Academic Registrar, April 1996
Objectives The student is expected to acquire an understanding of the topologies of dc-ac inverters for variable speed drive systems and modulation strategies used to control them, the structure and fundamental principles of variable speed operation of ac induction motors, including open-loop, closed-loop and vector controlled systems, and the principles of the d-q analysis technique applied to ac induction and synchronous machines. The student should appreciate the merits and disadvantages of various types of variable speed drive systems in different applications.
Synopsis Voltage and current source inverters, single and three-phase systems, six step and pulse width modulation strategies, variable speed drive systems, stepping motor and brushless dc motor drive systems, d-q analysis of ac induction and synchronous motors, vector control of ac motors, high power drive systems, implementation of drive systems.
Assessment Examination (2 hours): 70% + Written: 15% + Laboratory work: 15%