Harmonic distortion in three‐phase inverters controlled by synchronous sigma‐delta‐modulation

verfasst von: A. Mertens
Abstract: Several soft switching three‐phase inverters have been proposed in the literature, using a resonant AC or DC voltage link in order to reduce switching losses. This allows operation with higher switching frequencies. In these inverters, the switching instances have to be synchronized with the periodic zero crossings of the link voltage. Thus synchronous pulse modulation strategies like Sigma‐Delta‐Modulation have to be used for control. The benefit of high switching frequency has to be considered in the light of performance of the modulation scheme, which can be measured by determining the r.m.s. value of the distortion current. In this paper, this magnitude is calculated analytically for three‐phase inverters controlled by synchronous Sigma‐Delta Modulation. The derivation is based on the assumptions of constant link frequency and large ratio of link‐ to output frequency. The solutions allow to calculate the r.m.s. distortion current for any periodic shape of the link voltage including DC. Simulations show that the results hold for link‐ to output frequency ratios down to 100. The spectral performance of synchronous Sigma‐Delta‐Modulation is compared with conventional pulse width modulation.
Organisationseinheit(en): Fachgebiet Leistungselektronik und Antriebsregelung
Typ: Artikel
Journal: European Transactions on Electrical Power
Band: 2
Seiten: 351-358
Anzahl der Seiten: 8
ISSN: 1430-144X
Publikationsdatum: 11.1992
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Energieanlagenbau und Kraftwerkstechnik, Elektrotechnik und Elektronik
Elektronische Version(en): https://doi.org/10.1002/etep.4450020603 (Zugang: Geschlossen)

BibTeX

@article{333d9a8aec9d42ec9e81a1d9d9f0dabe,
title = "Harmonic distortion in three‐phase inverters controlled by synchronous sigma‐delta‐modulation",
abstract = "Several soft switching three‐phase inverters have been proposed in the literature, using a resonant AC or DC voltage link in order to reduce switching losses. This allows operation with higher switching frequencies. In these inverters, the switching instances have to be synchronized with the periodic zero crossings of the link voltage. Thus synchronous pulse modulation strategies like Sigma‐Delta‐Modulation have to be used for control. The benefit of high switching frequency has to be considered in the light of performance of the modulation scheme, which can be measured by determining the r.m.s. value of the distortion current. In this paper, this magnitude is calculated analytically for three‐phase inverters controlled by synchronous Sigma‐Delta Modulation. The derivation is based on the assumptions of constant link frequency and large ratio of link‐ to output frequency. The solutions allow to calculate the r.m.s. distortion current for any periodic shape of the link voltage including DC. Simulations show that the results hold for link‐ to output frequency ratios down to 100. The spectral performance of synchronous Sigma‐Delta‐Modulation is compared with conventional pulse width modulation.",
author = "A. Mertens",
year = "1992",
month = nov,
doi = "10.1002/etep.4450020603",
language = "English",
volume = "2",
pages = "351--358",
journal = "European Transactions on Electrical Power",
issn = "1430-144X",
publisher = "John Wiley and Sons Ltd",
number = "6",
}