Space vector based hybrid PWM techniques for reduced current ripple

G. Narayanan, Di Zhao, Harish K. Krishnamurthy, Raja Ayyanar, V. T. Ranganathan

Research output: Contribution to journalArticle

195 Citations (Scopus)

Abstract

This paper investigates certain novel switching sequences involving division of active vector time for space vectorbased pulsewidth modulation (PWM) generation for a voltage source inverter. This paper proposes two new sequences, and identifies all possible sequences, which result in the same average switching frequency as conventional space vector PWM (CSVPWM) at a given sampling frequency. This paper brings out a method for designing hybrid PWM techniques involving multiple sequences to reduce line current ripple. The three proposed hybrid PWM techniques (three-zone PWM, five-zone PWM and sevenzone PWM) employ three, five and seven different sequences, respectively, in every sector. Each sequence is employed in a spatial region within the sector where it results in the lowest rms current ripple over the given sampling period. The proposed techniques lead to a significant reduction in THD over CSVPWM at high line voltages. The five-zone technique results in the lowest THD among real-time techniques with uniform sampling, while the seven-zone technique is the best among real-time techniques with twin sampling rates. The superior harmonic performance of the proposed techniques over CSVPWM and existing bus-clamping PWM techniques is established theoretically as well as experimentally.

Original languageEnglish (US)
Pages (from-to)1614-1627
Number of pages14
JournalIEEE Transactions on Industrial Electronics
Volume55
Issue number4
DOIs
StatePublished - Apr 2008

Fingerprint

vector spaces
Vector spaces
ripples
Modulation
modulation
sampling
Sampling
pulse duration modulation
Pulse width modulation
sectors
line current
Electric potential
electric potential
Switching frequency
low currents
division
harmonics

Keywords

  • Harmonic analysis
  • Harmonic distortion
  • Hybrid PWM
  • Induction motor drive
  • Pulsewidth modulation (PWM)
  • PWM inverters
  • Space vector
  • Space vector modulation
  • Spread spectrum
  • Stator flux ripple
  • Switching sequences

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation

Cite this

Space vector based hybrid PWM techniques for reduced current ripple. / Narayanan, G.; Zhao, Di; Krishnamurthy, Harish K.; Ayyanar, Raja; Ranganathan, V. T.

In: IEEE Transactions on Industrial Electronics, Vol. 55, No. 4, 04.2008, p. 1614-1627.

Research output: Contribution to journalArticle

Narayanan, G. ; Zhao, Di ; Krishnamurthy, Harish K. ; Ayyanar, Raja ; Ranganathan, V. T. / Space vector based hybrid PWM techniques for reduced current ripple. In: IEEE Transactions on Industrial Electronics. 2008 ; Vol. 55, No. 4. pp. 1614-1627.
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