Title :
Model Predictive Direct Torque Control With Finite Control Set for PMSM Drive Systems, Part 1: Maximum Torque Per Ampere Operation
Author :
Preindl, Matthias ; Bolognani, Saverio
Author_Institution :
Dept. of Ind. Eng., Univ. of Padova, Padua, Italy
Abstract :
A novel type of Model Predictive Direct Torque Control (MP-DTC) is proposed in this paper. The future behavior of the plant is predicted using a discrete-time state-space model in the dq reference frame for a finite set of voltage vectors, which is pre-selected by a graph algorithm. The preferable input is chosen based on a cost function. Contrarily to conventional MP-DTC (and DTC), the stator flux is not explicitly controlled nor hysteresis bounds are used. The cost function is designed to meet multiple demands: torque reference tracking, Maximum Torque per Ampere (MTPA) tracking for high electrical efficiency, and limitation of the states to their maximum admissible values.
Keywords :
discrete time systems; graph theory; machine vector control; permanent magnet machines; predictive control; state-space methods; synchronous machines; torque control; tracking; voltage control; MP-DTC; MTPA tracking; Maximum Torque per Ampere tracking; PMSM drive system; cost function; discrete-time state-space model; electrical efficiency; finite control set; future plant behavior prediction; graph algorithm; hysteresis bounds; maximum torque per ampere operation; model predictive direct torque control; permanent magnet synchronous machine; stator flux; torque reference tracking; voltage vector; Cost function; Permanent magnet machines; Predictive control; Switching frequency; Torque control; Direct Torque Control (DTC); drive systems; model predictive control (MPC); permanent magnet synchronous machine (PMSM);
Journal_Title :
Industrial Informatics, IEEE Transactions on
DOI :
10.1109/TII.2012.2227265
