Inventor · disambiguated record
Roy S. Colby
Also filed as: COLBY ROY · COLBY ROY S · COLBY ROY STEPHEN
30 granted patents·1 pending application·844 citations·filing 1993–2020
97Inventor score
Top patents by PatentIndex Score
31 records- 0199US11128253B1Rotor resistance based motor thermal protectionSCHNEIDER ELECTRIC USA INC·Filed 2020·Granted Sep 21, 2021·8 cites·20 claims
- 0297US7183667B2Method and apparatus for power inverter synchronizationSQUARE D CO·Filed 2003·Granted Feb 27, 2007·199 cites·52 claims
- 0395US5929400ASelf commissioning controller for field-oriented elevator motor/drive systemOTIS ELEVATOR CO·Filed 1997·Granted Jul 27, 1999·155 cites·3 claims
- 0492US7570074B2Electronic overload relay for mains-fed induction motorsSQUARE D CO·Filed 2005·Granted Aug 4, 2009·27 cites·26 claims
- 0592US5379864AMagnetic system for elevator car lateral suspensionOTIS ELEVATOR CO·Filed 1993·Granted Jan 10, 1995·49 cites·12 claims
- 0691US8373379B2Methods and devices for estimation of induction motor inductance parametersSCHNEIDER ELECTRIC USA INC·Filed 2010·Granted Feb 12, 2013·11 cites·19 claims
- 0790US7769552B2Method and apparatus for estimating induction motor rotor temperatureSCHNEIDER ELECTRIC USA INC·Filed 2008·Granted Aug 3, 2010·25 cites·27 claims
- 0887US8102140B2Method and apparatus for estimating induction motor electrical parametersGAO ZHI·Filed 2008·Granted Jan 24, 2012·20 cites·39 claims
- 0984US5880416AAutomatic calibration of motor speed loop gain for an elevator motor controlOTIS ELEVATOR CO·Filed 1997·Granted Mar 9, 1999·41 cites·7 claims
- 1081US7015597B2Power regulator for power inverterSQUARE D CO·Filed 2003·Granted Mar 21, 2006·46 cites·36 claims
- 1178US8800309B2Method of automatically detecting an anomalous condition relative to a nominal operating condition in a vapor compression systemBUDA PAUL ROBERT·Filed 2009·Granted Aug 12, 2014·11 cites·29 claims
- 1276US8035322B2Methods and apparatuses for estimating transient slipTURNER LARRY A·Filed 2008·Granted Oct 11, 2011·10 cites·25 claims
- 1376US6163472AElevator DC motor drive with unity power factor, including regenerationOTIS ELEVATOR CO·Filed 1999·Granted Dec 19, 2000·51 cites·8 claims
- 1476US5883344AAutomatic calibration of field-oriented elevator motor drive parameters using standstill motor measurementsOTIS ELEVATOR CO·Filed 1997·Granted Mar 16, 1999·33 cites·10 claims
- 1573US5909018AAutomatic fine-tuning of rotor time constant and magnetizing current in field-oriented elevator motor driveOTIS ELEVATOR CO·Filed 1997·Granted Jun 1, 1999·29 cites·7 claims
- 1671US9231512B2Systems, methods, and devices for demodulating induction motor instantaneous rotor slot harmonic frequencyGAO ZHI·Filed 2011·Granted Jan 5, 2016·3 cites·18 claims
- 1769US8332163B2Methods and apparatus for estimating rotor slotsTURNER LARRY A·Filed 2012·Granted Dec 11, 2012·2 cites·14 claims
- 1869US7079365B2Electrical fault detection systemSQUARE D CO·Filed 2003·Granted Jul 18, 2006·17 cites·26 claims
- 1968US7766231B2Devices and methods for determining the amount of individual usage of a shared commoditySCHNEIDER ELECTRIC USA INC·Filed 2005·Granted Aug 3, 2010·3 cites·23 claims
- 2066US7680234B2Method and apparatus for signal phase lockingSCHNEIDER ELECTRIC USA INC·Filed 2004·Granted Mar 16, 2010·14 cites·22 claims
- 2165US8131482B2Methods and apparatus for estimating rotor slotsTURNER LARRY A·Filed 2008·Granted Mar 6, 2012·5 cites·9 claims
- 2260US10454390B2Detection of initial motor rotation in mains-fed induction motorSCHNEIDER ELECTRIC USA INC·Filed 2017·Granted Oct 22, 2019·0 cites·16 claims
- 2360US5880415AAutomatic calibration of current regulator control compensation for an elevator motor drive with locked rotorOTIS ELEVATOR CO·Filed 1997·Granted Mar 9, 1999·21 cites·10 claims
- 2456US8744630B2System and method for measuring atmospheric parameters in enclosed spacesCOLBY ROY STEPHEN·Filed 2010·Granted Jun 3, 2014·1 cites·22 claims
- 2551US5821656AMagnetic bearing with reduced control-flux-induced rotor lossUNITED TECHNOLOGIES CORP·Filed 1995·Granted Oct 13, 1998·12 cites·13 claims
- 2649US5814774AElevator system having a force-estimation or position-scheduled current command controllerOTIS ELEVATOR CO·Filed 1996·Granted Sep 29, 1998·28 cites·13 claims
- 2745US9851382B2Power meter with current and phase sensorSCHNEIDER ELECTRIC USA INC·Filed 2012·Granted Dec 26, 2017·0 cites·20 claims
- 2845US6452360B1Auto tuning and parameter identification of a control circuitSQUARE D CO·Filed 1999·Granted Sep 17, 2002·11 cites·10 claims
- 2945US2011148883A1Methods and apparatuses for computation and display of equipment operational dataSCHNEIDER ELECTRIC USA INC·Filed 2009·Application pending·0 cites
- 3043US7112898B2Real-time digital voltage sag compensatorSQUARE D CO·Filed 2002·Granted Sep 26, 2006·5 cites·21 claims
- 3134US5896954AAutomatic fine tuning of rotor time constant in field-oriented elevator motor driveOTIS ELEVATOR CO·Filed 1997·Granted Apr 27, 1999·7 cites·10 claims
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