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IEEE Lecture by Professor Kumarkutti Gopakumar on POLYGONAL VOLTAGE Space Vector Generation 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 seventh order 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.

Date and Time

• Date: 25 Jul 2019
• Time: 05:00 PM to 06:30 PM
• All times are Australia/Sydney
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Location

• Room 408, Level 6, UTS Building 11 (CB11.06.408)
• Ultimo, New South Wales
• Australia 2007
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Contact

• Email event contact

• Associate Professor Dylan Lu (dylandclu@ieee.org)

  Chair of IEEE NSW Joint Chapter IES/IAS/PEL

Speakers

Professor Kumarkutti Gopakumar of Indian Institute of Science (IISc)