Inventor
CURRAN JR EARL J
US6 patents
Patents
6 patentsUS4912390AMar 27, 1990
Apparatus for controlling firing of thyristors relative to a current reaching zero by using a microcomputer and hardware responsive to voltage crossing zero
SQUARE D CO59 citations94
US4710692ADec 1, 1987
Self calibration of the thyristor firing angel of a motor controller using a current window to determine a final value of a reference current lag phase angle
SQUARE D CO44 citations91
US4833628AMay 23, 1989
Up to speed detector for an electric motor using measured values of the current lag; and voltage ramp controller using the up to speed indication
SQUARE D CO45 citations90
US4634951AJan 6, 1987
Reduced voltage starter with voltage ramp control
SQUARE D CO24 citations80
US4823226AApr 18, 1989
Phase loss detection circuit including transient protection
SQUARE D CO18 citations66
US4520304AMay 28, 1985
Three phase scaling current-to-voltage convertor
SQUARE D CO1 citations50