WILLIAM S OLEYAR
Engineers in Mckeesport, PA
License number
Pennsylvania PE045951E
Category
Engineers
Type
Professional Engineer
Address
Address
Mckeesport, PA 15131
Professional information
Digital Motor Control System
US Patent:
5321343, Jun 14, 1994
Filed:
Feb 16, 1993
Appl. No.:
8/017804
Inventors:
John W. Kane - Pittsburgh PA
William S. Oleyar - White Oak PA
Robert S. Peterson - Pittsburgh PA
William S. Oleyar - White Oak PA
Robert S. Peterson - Pittsburgh PA
Assignee:
AEG Automation Systems Corporation - Pittsburgh PA
International Classification:
H02P 1320
US Classification:
318254
Abstract:
A control system for one or more dc motors in which thyristor power modules selectively gate portions of half cycles of ac voltage to the motor field and armature windings, has digitally implemented parallel inner control loops for the armature which each generate an intermediate control signal to which proportional plus derivative control action has been applied. Logic selects the intermediate control signal which phases back firing pulses for the thyristor power modules the most for application to a common digital integrator which produces a control signal having proportional plus integral control action. The voltage across each of the thyristors is monitored and used to detect continuous and discontinuous current operation for adjusting integrator gain.