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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 1    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 1,January 2012
SAT Implementation in Direct Torque Control For Dynamic Response in Multi Level Inverter Induction Motor DRIVES
Full Text(PDF, )  PP.149-155  
Author(s)
Rohithbalaji Jonnala
KEYWORDS
Direct Torque Control (DTC), Multi Level Inverter, Induction Motor Drives, Sector Advancement Technique (SAT).
ABSTRACT
This paper presents the implementation of Direct Torque Control (DTC) with Sector Advancement Technique (SAT) algorithm for the control of a Hybrid Cascaded H-Bridge Multilevel Inverter Induction motor Drive. It is useful to keep the motor torque and stator flux and the inverter's neutral point potential within given hysteresis bounds while reducing the average switching frequency of the inverter and overall computational time period comparison with the standard direct torque control (CDTC). This method also improving overall efficiency with Torque and Flux ripple reduction. In addition, the multilevel inverter can generate a high and fixed switching frequency output voltage with fewer switching losses, since only the small power cells of the inverter operate at a high switching rate. Therefore, a high performance and also efficient torque and flux controllers are obtained, enabling a DTC solution for multilevel-inverter-powered motor drives.
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