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July 1, 1992IEEE Transactions on Power Electronics1,093 citations

A new multilevel PWM method: a theoretical analysis

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GCGiuseppe Raffaello CarraraSGS. GardellaMMMario Marchesoni

Key Points

  • To analyze a new pulsewidth modulation method for controlling multilevel voltage source inverters and its effects on output waveforms.
  • Generalization of the PWM subharmonic method for single or three-phase VSIs
  • Analytical derivation of spectral components of output waveforms
  • Utilization of extended Bennet's method for analysis
  • Demonstrated improvements in the harmonic spectrum of output waveforms
  • Analytical expressions derived for various operating conditions
  • Validation through several examples showing effective multilevel modulation

Abstract

Generalization of the pulsewidth modulation (PWM) subharmonic method to control single-phase or three-phase multilevel voltage source inverters (VSI) is considered. An analytical expression of the spectral components of the output waveforms covering all the operating conditions is derived. The analysis is based on an extension of Bennet's method. The improvements in harmonic spectrum are pointed out, and several examples are presented, which prove the validity of the multilevel modulation.>

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Cite This Study

Carrara et al. (1992) studied this question.

synapsesocial.com/papers/6a08e70e27ceb0c2a2d616e0https://doi.org/10.1109/63.145137
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