DocumentCode :
1506047
Title :
Analysis of direct torque control in permanent magnet synchronous motor drives
Author :
Zhong, L. ; Rahman, M.F. ; Hu, W.Y. ; Lim, K.W.
Author_Institution :
Sch. of Electr. Eng., New South Wales Univ., Sydney, NSW, Australia
Volume :
12
Issue :
3
fYear :
1997
fDate :
5/1/1997 12:00:00 AM
Firstpage :
528
Lastpage :
536
Abstract :
This paper describes an investigation of direct torque control (DTC) for permanent magnet synchronous motor (PMSM) drives. It is mathematically proven that the increase of electromagnetic torque in a permanent magnet motor is proportional to the increase of the angle between the stator and rotor flux linkages, and, therefore, the fast torque response can be obtained by adjusting the rotating speed of the stator flux linkage as fast as possible. It is also shown that the zero voltage vectors should not be used, and stator flux linkage should be kept moving with respect to the rotor flux linkage all the time. The implementation of DTC in the permanent magnet motor is discussed, and it is found that for DTC using available digital signal processors (DSPs), it is advantageous to have a motor with a high ratio of the rated stator flux linkage to stator voltage. The simulation results verify the proposed control and also show that the torque response under DTC is much faster than the one under current control
Keywords :
digital control; digital signal processing chips; machine control; machine theory; magnetic flux; permanent magnet motors; rotors; stators; synchronous motors; torque control; DSP; digital signal processors; direct torque control; electromagnetic torque; permanent magnet synchronous motor drives; rotor flux linkage; saliency; sensorless control; stator flux linkage; stator voltage; Couplings; Digital signal processing; Digital signal processors; Magnetic analysis; Permanent magnet motors; Permanent magnets; Rotors; Stators; Torque control; Voltage;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/63.575680
Filename :
575680
Link To Document :
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