Inventor
COLBY ROY STEPHEN
US15 patents
⚠️ This page may combine multiple inventors who share the name “COLBY ROY STEPHEN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTIS ELEVATOR CO
6 patentsUS5929400AJul 27, 1999
Self commissioning controller for field-oriented elevator motor/drive system
OTIS ELEVATOR CO155 citations96
US5909018AJun 1, 1999
Automatic fine-tuning of rotor time constant and magnetizing current in field-oriented elevator motor drive
OTIS ELEVATOR CO29 citations92
US5880416AMar 9, 1999
Automatic calibration of motor speed loop gain for an elevator motor control
OTIS ELEVATOR CO41 citations92
US5883344AMar 16, 1999
Automatic calibration of field-oriented elevator motor drive parameters using standstill motor measurements
OTIS ELEVATOR CO33 citations91
US5880415AMar 9, 1999
Automatic calibration of current regulator control compensation for an elevator motor drive with locked rotor
OTIS ELEVATOR CO21 citations91
US5896954AApr 27, 1999
Automatic fine tuning of rotor time constant in field-oriented elevator motor drive
OTIS ELEVATOR CO7 citations68
SQUARE D CO
4 patentsUS7183667B2Feb 27, 2007
Method and apparatus for power inverter synchronization
SQUARE D CO199 citations97
US7570074B2Aug 4, 2009
Electronic overload relay for mains-fed induction motors
SQUARE D CO27 citations92
US7015597B2Mar 21, 2006
Power regulator for power inverter
SQUARE D CO46 citations91
US6452360B1Sep 17, 2002
Auto tuning and parameter identification of a control circuit
SQUARE D CO11 citations73
SCHNEIDER ELECTRIC USA INC
3 patentsUS11128253B1Sep 21, 2021
Rotor resistance based motor thermal protection
SCHNEIDER ELECTRIC USA INC8 citations83
US7680234B2Mar 16, 2010
Method and apparatus for signal phase locking
SCHNEIDER ELECTRIC USA INC14 citations82
US7766231B2Aug 3, 2010
Devices and methods for determining the amount of individual usage of a shared commodity
SCHNEIDER ELECTRIC USA INC3 citations54