Compensating baseband distortion of regularly sampled pulse-width modulators for high-precision power converters

Bas Vermulst (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
9 Downloads (Pure)

Abstract

This paper presents a straight-forward method to compensate baseband distortion for regularly sampled pulsewidth modulation, for both sawtooth and triangular carrier, aimed at high-precision power electronics applications such as medical MRI and semiconductor lithography. The method adds correction signals to the modulator input to mitigate the distortion, which is computationally lightweight, and pseudo-code is given to simplify implementation. Measurements are conducted, which confirm the improvements offered by the method. It is shown that baseband distortion can be reduced by upto 60 dB. This improves the linearity and reduces audible noise of power converters.

Original languageEnglish
Article number8486735
Pages (from-to)6257-6263
Number of pages7
JournalIEEE Transactions on Power Electronics
Volume34
Issue number7
DOIs
Publication statusPublished - Jul 2019

Keywords

  • Baseband
  • Delays
  • Distortion
  • Harmonic analysis
  • Mathematical model
  • Pulse width modulation
  • Pulse width modulation converters
  • Nonlinear distortion
  • Power quality
  • Predistortion

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