P-I and I-P controllers in a closed loop for DC motor drives

Author

Ahmed, F.I. ; El-Tobshy, A.M. ; Mahfouz, A.A. ; Ibrahim, M.M.S.

Author_Institution

Fac. of Eng., Cairo Univ., Egypt

Volume

2

fYear

1997

fDate

3-6 Aug 1997

Firstpage

613

Abstract

The traditional proportional-integral (PI) controller, which has been widely used for the speed control of DC motor drives, has been compared with the relatively new integral-proportional (IP) controller which were first discussed in 1978. This paper presents some improvements in this important industrial field. Theoretical studies for PI and IP controllers in the S-domain are presented, and the transfer functions for both are derived. Simulation results due to step response in the S-domain and Z-domain are presented for both controllers. Experimental studies are discussed in detail. The performance of the two controllers due to step input reference and their behavior due to sudden changes in reference speed and load are discussed. The simulation and the experimental results indicate the superiority of IP over PI controllers

Keywords

DC motor drives; control system analysis; machine control; machine testing; machine theory; step response; transfer functions; two-term control; variable speed drives; velocity control; DC motor drives; IP control; PI control; S-domain; Z-domain; closed-loop speed control; control performance; control simulation; integral-proportional control; proportional-integral control; step response; transfer functions; DC motors; Drives; Error correction; Pi control; Power electronics; Power engineering and energy; Proportional control; Steady-state; Transfer functions; Velocity control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Conversion Conference - Nagaoka 1997., Proceedings of the

Conference_Location

Nagaoka

Print_ISBN

0-7803-3823-5

Type

conf

DOI

10.1109/PCCON.1997.638255

Filename

638255