Title :
A reference flux calculation method with stator flux linkage synchronous frame for MTPA control in direct torque controlled PMSM drives
Author :
Atsushi Shinohara;Yukinori Inoue;Shigeo Morimoto;Masayuki Sanada
Author_Institution :
Department of Electrical and Information Systems, Osaka Prefecture University, Japan
Abstract :
When direct torque control (DTC) is applied to permanent magnet synchronous motor (PMSM) drives, the relationship between the torque and stator flux linkage is important for high-efficiency drives because DTC requires them as references. In the stator flux linkage synchronous frame (M-T frame), the torque equation is described as a simple equation using the T-axis current. However, the M-axis current is neglected in the equation. This paper derives the relationship between the M-axis current and the stator flux linkage and proposes a maximum torque per ampere control strategy for direct torque controlled PMSM drives using the derived relationship. In addition, the q-axis inductance can be compensated using that relationship because the error in the q-axis inductance causes the estimation error in M-axis current. The simulation results validate the proposed method.
Keywords :
"Decision support systems","Torque","Stators","Couplings","Mathematical model","Inductance","Torque control"
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2015 18th International Conference on
DOI :
10.1109/ICEMS.2015.7384999