A new control scheme for improving disturbance rejection in speed control of permanent magnet synchronous motors

Author

Srinivasan, B. ; Rao, N.J. ; Prasad, U.R. ; Pittet, A.

Author_Institution

Dept. of Comput. Sci. & Autom., Indian Inst. of Sci., Bangalore, India

Volume

4

Issue

4

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

437

Lastpage

442

Abstract

The major hurdle encountered in achieving high performance in servo speed control is the occurrence of large relative errors at low speeds due to torque variations. In this paper, it is shown that this problem can be tackled in the case of synchronous motors, by keeping the stator current and the rotor flux nonorthogonal and including an inner position control loop to improve the transient behavior of the system. Such a scheme substantially improves disturbance rejection at the cost of accentuating the nonlinearities of the system and increasing the copper losses. In view of the pronounced nonlinearities encountered here, adaptive control using neural networks is resorted to

Keywords

adaptive control; control nonlinearities; machine control; neurocontrollers; permanent magnet motors; stability; synchronous motors; velocity control; adaptive control; copper losses; disturbance rejection; inner position control loop; large relative errors; neural networks; nonlinearities; permanent magnet synchronous motors; rotor flux; servo speed control; speed control; stator current; torque variations; transient behavior; Adaptive control; Copper; Costs; Error correction; Position control; Rotors; Servomechanisms; Stators; Synchronous motors; Velocity control;

fLanguage

English

Journal_Title

Control Systems Technology, IEEE Transactions on

Publisher

ieee

ISSN

1063-6536

Type

jour

DOI

10.1109/87.508892

Filename

508892