Investigation of delta modulation spectra and of sub-harmonic elimination techniques.

T. C. Green, J. C. Salmon, B. W. Williams

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The frequency spectrum produced by an inverter controlled by a delta modulator is examined. Analytical expressions are derived that model the spectrum. Computed spectra are compared to practical results, and good agreement is demonstrated. The analysis can be used to illustrate the dependence of the spectra on various modulator properties. The generation of sub- and partial harmonics within such a system can also be explained. A technique has been developed for eliminating sub- and partial harmonics by ensuring that the output waveforms exhibit quarter-wave symmetry. Practical results demonstrate that the technique is successful. The effects that imposing quarter-wave symmetry has on other aspects of the modulator's performance are also considered.

Original languageEnglish
Title of host publication19th Annual IEEE Power Electronics Specialists Conference
Pages290-297
Number of pages8
Publication statusPublished - 1988
Event19th Annual IEEE Power Electronics Specialists Conference - Kyoto, Japan
Duration: 19 Jul 199923 Jul 1999

Publication series

NameIEEE Power Electronics Specialists Conference (PESC)
ISSN (Print)0275-9306

Conference

Conference19th Annual IEEE Power Electronics Specialists Conference
CountryJapan
CityKyoto
Period19/07/9923/07/99

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