Model-based voltage calculation for inverters with small DC-Link capacitance

Author

Von Zimmermann, Moritz ; Kuskov, Andrey ; Piepenbreier, Bernhard

Author_Institution

Electr. Drives & Machines, Univ. of Erlangen-Nuremberg, Erlangen, Germany

fYear

2011

fDate

28-29 Sept. 2011

Firstpage

243

Lastpage

248

Abstract

Employing only a small capacitance in the DC-link of an adjustable speed drive (ASD) enables the replacement of electrolytic capacitors with film capacitors. Unfortunately, in combination with a diode bridge rectifier the DC-link voltage exhibits a significant six-pulse ripple. By measuring the DC-link voltage and providing the load side control with its value as widely done, this ripple can be compensated. In the following, a method is presented calculating the varying DC-link voltage by referring exclusively to the transfer function of the rectifier. This way, the DC-link voltage sensor can be omitted. Additionally, a partially damped mains filter is implemented to reduce line current oscillations. Experimental results verify the suitability of both the filter design and the model-based control.

Keywords

AC motor drives; filters; invertors; machine control; variable speed drives; adjustable speed drive; diode bridge rectifier; film capacitor; filter design; inverters; line current oscillation; load side control; model based control; model based voltage calculation; partially damped mains filter; small DC Link capacitance; transfer function; Capacitance; Inductors; Inverters; Load modeling; Radio frequency; Voltage control; Voltage measurement; capacitors; harmonic distortion; line filter; model-based control; small DC-link capacitance; variable speed drives; voltage source inverter (VSI);

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Drives Production Conference (EDPC), 2011 1st International

Conference_Location

Nuremberg

Print_ISBN

978-1-4577-1371-2

Type

conf

DOI

10.1109/EDPC.2011.6085566

Filename

6085566