A Low-Order Harmonic Elimination Scheme for Induction Motor Drives Using a Multilevel Octadecagonal Space Vector Structure With a Single DC Source

Mathews Boby, Arun Rahul, K. Gopakumar, L. Umanand, Frede Blaabjerg, Subhashish Bhattacharya

Research output: Contribution to journalJournal articleResearchpeer-review

4 Citations (Scopus)

Abstract

Conventional voltage-source inverters used for induction motor drives generate a hexagonal space vector structure. In the overmodulation range, the hexagonal space vector structure generates low-order harmonics in the phase voltage resulting in low-order torque ripple in the motor. Inverter topologies with an octadecagonal (18 sided) space vector structure eliminate fifth-, seventh-, eleventh-, and thirteenth-order harmonics from the phase voltage, and hence, the dominant sixth- and twelfth-order torque ripple generation is eliminated. Octadecagonal space vector structures proposed in the past require multiple dc sources, which makes four-quadrant operation of the drive system difficult and costly. In this paper, the formation of a multilevel nine-concentric octadecagonal space vector structure using a single dc source is proposed. Detailed experimental results, using open-loop V/f control and rotor field-oriented control, are presented to validate the effectiveness of the proposed drive scheme.
Original languageEnglish
Article number7904707
JournalI E E E Transactions on Power Electronics
Volume33
Issue number3
Pages (from-to)2430 - 2437
Number of pages8
ISSN0885-8993
DOIs
Publication statusPublished - Mar 2018

Keywords

  • Harmonic elimination
  • induction motor drive (IMD)
  • low-order harmonics
  • multilevel converters
  • octadecagon
  • power converter
  • single dc source
  • space vector

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