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Estimation of the Fundamental Current in Low - Switching-Frequency High Dynamic Medium-Voltage Drives.
- Source :
-
IEEE Transactions on Industry Applications . Sep/Oct2008, Vol. 44 Issue 5, p1597-1605. 9p. 2 Black and White Photographs, 1 Chart, 19 Graphs. - Publication Year :
- 2008
-
Abstract
- The switching frequency of medium-voltage ac drives is limited to low values to restrain the dynamic losses of the power devices. This favors the use of synchronous optimal pulsewidth-modulation schemes that minimize the harmonic current. It is a drawback, though, that optimal algorithms do not have a means to extract the fundamental component of the load current. High- performance torque control is therefore difficult to obtain. This paper proposes a method to identify the instantaneous fundamental component of the stator currents. A novel observer is developed for this purpose. The approach enables fast torque control at very low switching frequency. Experimental results from a 30-kW induction motor drive are presented. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00939994
- Volume :
- 44
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industry Applications
- Publication Type :
- Academic Journal
- Accession number :
- 34624522
- Full Text :
- https://doi.org/10.1109/TIA.2008.2002212