DocumentCode :
2798574
Title :
Model Predictive Direct Torque Control of permanent magnet synchronous motors
Author :
Geyer, Tobias ; Beccuti, Giovanni A. ; Papafotiou, Georgios ; Morari, Manfred
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Auckland, Auckland, New Zealand
fYear :
2010
fDate :
12-16 Sept. 2010
Firstpage :
199
Lastpage :
206
Abstract :
Model Predictive Direct Torque Control (MPDTC) is a recent computational control methodology that combines the merits of Model Predictive Control (MPC) with the ones of Direct Torque Control (DTC). Specifically, with respect to standard DTC, the converter´s switching frequency and/or losses are considerably reduced, while at the same time the Total Harmonic Distortion (THD) levels of the phase currents and the torque are improved. Moreover, DTC´s favorable dynamic and robustness properties are preserved. This paper presents an MPDTC scheme for a permanent magnet synchronous motor that achieves long prediction horizons in the range of up to 150 time-steps through the use of extrapolation and bounds. A discrete-time internal controller model of the drive system is derived from the physical equations. Simulation results for a three-level voltage source inverter indicate that such an MPDTC scheme, compared to an industry standard controller, is capable of reducing the switching losses and the switching frequency by up to 50%, and the torque THD by 25%, while leaving the current THD unchanged.
Keywords :
discrete time systems; extrapolation; harmonic distortion; invertors; machine control; permanent magnet motors; power convertors; predictive control; synchronous motors; torque control; THD levels; converter switching frequency; discrete-time internal controller model; extrapolation; industry standard controller; model predictive direct torque control; permanent magnet synchronous motors; phase currents; physical equations; three-level voltage source inverter; total harmonic distortion; Inverters; Mathematical model; Predictive models; Stators; Switches; Switching frequency; Model predictive control; direct torque control; medium-voltage drive; permanent magnet synchronous machine;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2010 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-5286-6
Electronic_ISBN :
978-1-4244-5287-3
Type :
conf
DOI :
10.1109/ECCE.2010.5618044
Filename :
5618044
Link To Document :
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