Title :
Effects of finite switching frequency and computational delay on PWM controlled servo DC drives
Author :
T.A. Sakharuk;B. Lehman;A.M. Stankovic;G. Tadmor
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
Abstract :
Effects of (low) switching frequency and of delays (due to digital control implementation) on DC servomotor drives with a PWM power supply are examined. A modeling procedure and analytical formulae to quantify deviations from standard (idealized) fixed-gain models are presented, and illustrated by simulations and hardware experiments. Necessary and sufficient conditions for the existence of a periodic steady state in the operation of a DC servomotor drive are also described.
Keywords :
"Switching frequency","Delay effects","Servomotors","Pulse width modulation","Analytical models","Digital control","Power supplies","Computational modeling","Hardware","Sufficient conditions"
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS ´97., Conference Record of the 1997 IEEE
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.643145
