Advanced bus-clamping PWM techniques based on space vector approach

G. Narayanan, Harish K. Krishnamurthy, Di Zhao, Raja Ayyanar

Research output: Contribution to journalArticlepeer-review

165 Scopus citations


Conventional space vector pulsewidth modulation (CSVPWM) employs conventional switching sequence, which divides the zero vector time equally between the two zero states in every subcycle. Existing bus-clamping PWM (BCPWM) techniques employ clamping sequences, which use only one zero state in a subcycle. This paper deals with a special type of switching sequences, termed here as "double-switching clamping sequences," which use only one zero state and apply an active vector twice in a subcycle. The present work brings out a class of bus-clamping PWM techniques, which employ such sequences. It is shown analytically as well as experimentally that the proposed BCPWM techniques result in reduced harmonic distortion in the line currents over CSVPWM as well as existing BCPWM techniques at high modulation indices for a given average switching frequency of FSW. At high modulation indices, the dominant harmonic components in the line voltages are around 2 FSWwith the proposed BCPWM techniques, while the dominant components are around FSW and 1.5 FSW, respectively, with CSVPWM and existing BCPWM techniques. The proposed techniques also reduce the inverter switching losses at high power factors over CSVPWM and existing BCPWM techniques.

Original languageEnglish (US)
Pages (from-to)974-984
Number of pages11
JournalIEEE Transactions on Power Electronics
Issue number4
StatePublished - Jul 2006


  • Bus clamping pulsewidth modulation (BCPWM)
  • Discontinuous PWM
  • Harmonic distortion
  • Induction motor drives
  • PWM inverters
  • Space vector PWM
  • Stator flux ripple
  • Switching sequences

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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