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Improved sensorless direct torque control method using adaptive flux observer.
- Source :
- IET Power Electronics (Wiley-Blackwell); Jul2014, Vol. 7 Issue 7, p1675-1684, 10p, 1 Color Photograph, 2 Diagrams, 4 Charts, 9 Graphs
- Publication Year :
- 2014
-
Abstract
- A simple structure and a quick and robust response of the direct torque control (DTC) makes it attractive in ac drives. However, in sensorless applications, a precise estimation of the rotor speed is a crucial issue as along with the torque and flux estimation. In this paper an adaptive flux observer is introduced with a stator current and flux vector components as state variables and rotor speed as an unknown parameter which is estimated by using an adaptive scheme. A non-linear inverter model is proposed to obtain a more accurate response. Also, torque, flux and current pulsations, during the steady-state conditions, are considered as the disadvantages of the classical DTC method. A combined DTC and space vector modulation strategy is presented by using fuzzy logic control (FLC). FLCs are designed to obtain a fast response in the transients, and a high accuracy during the steady-state conditions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17554535
- Volume :
- 7
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- IET Power Electronics (Wiley-Blackwell)
- Publication Type :
- Academic Journal
- Accession number :
- 96971880
- Full Text :
- https://doi.org/10.1049/iet-pel.2013.0390