IEEE PES Distinguished Lecture - Polygonal Voltage Space Vector Generation Using Switched Capacitive Filters for Drive Applications


IEEEPower Electronics Society Distinguished Lecturer

Polygonal Voltage Space Vector Generation Using Switched Capacitive Filters for Drive Applications


Multilevel inverters are preferred for variable speed drives due to its improved output voltage profile, less low order harmonic content and low dv/dt requirements for the devices, etc.;. But the conventional multilevel voltage space vector structure has a hexagonal profile, and it introduces the low order (fifth and seventh) harmonics especially in the over modulation region. In this respect, dodecagonal voltage space vector structure with increased modulation range and suppression of the fifth and seventh order harmonics is a viable alternative for the conventional hexagonal structure for the voltage space vector structure, for PWM control. The dodecagonal voltage space vector structure generation for an induction motor drive with open-end structure will be introduced in the first part of the lecture, and then it will be extended to the normal three-phase IM drive using a switched capacitive H-bridge acting as a fifth and seventhorder harmonics, throughout the modulation range, in this talk. The switched capacitive filter with a capacitive fed H-bridge will only supply reactive energy, and the capacitor voltage can be balanced during the PWM control without any complexity. The same concept can also be extended for octadecagonal and other higher levels of voltage space vector generation using the basic inverter modules.


Dr. Gopakumar. K. is a Fellow of IEEE, and also a Distinguished Lecturer of IEEE Industrial Electronics Society (IES). He is a fellow of both Institution of Electrical and Telecommunication Engineers, India and Indian National Academy of Engineers, India. Currently, Gopakumar. K. is an Associate Editor of IEEE Transaction on Industrial Electronics, and he was the Co-Editor in Chief of IEEE Transactions on Industrial Electronics. Gopakumar. K. offers his service to the industry as a consultant and completed severalindustry projects.

  Date and Time




  • Date: 25 Jul 2019
  • Time: 05:00 PM to 06:30 PM
  • All times are (UTC+10:00) Sydney
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  • University of Technology Sydney
  • Sydney, New South Wales
  • Australia 2000
  • Building: Level 6, Building 11(CB11.06.408)
  • Room Number: 408