Inventor · disambiguated record
Thomas A. Nondahl
Also filed as: NONDAHL THOMAS · NONDAHL THOMAS A · NONDAHL THOMAS ARTHUR
44 granted patents·1 pending application·879 citations·filing 1981–2017
98Inventor score
Top patents by PatentIndex Score
45 records- 0198US9490738B2Sensorless motor drive vector controlROCKWELL AUTOMATION TECH INC·Filed 2016·Granted Nov 8, 2016·28 cites·16 claims
- 0298US8619446B2Cascaded H-bridge (CHB) inverter level shift PWM with rotationLIU JINGBO·Filed 2012·Granted Dec 31, 2013·55 cites·20 claims
- 0397US9374028B2Transition scheme for position sensorless control of AC motor drivesROCKWELL AUTOMATION TECH INC·Filed 2014·Granted Jun 21, 2016·21 cites·20 claims
- 0497US9054621B2Position sensorless open loop control for motor drives with output filter and transformerLIU JINGBO·Filed 2013·Granted Jun 9, 2015·18 cites·19 claims
- 0597US8982593B2Cascaded H-Bridge (CHB) inverter level shift PWM with rotationROCKWELL AUTOMATION TECH INC·Filed 2013·Granted Mar 17, 2015·27 cites·20 claims
- 0697US4405873ARotor for a line-start permanent-magnet motorGEN ELECTRIC·Filed 1981·Granted Sep 20, 1983·83 cites·10 claims
- 0796US9294019B2Method and apparatus for controlling power converter with inverter output filterROCKWELL AUTOMATION TECH INC·Filed 2014·Granted Mar 22, 2016·18 cites·19 claims
- 0895US9595896B1Methods and systems for sensorless closed loop motor speed and torque controlROCKWELL AUTOMATION TECH INC·Filed 2015·Granted Mar 14, 2017·15 cites·24 claims
- 0994US9774284B2Rotor position estimation apparatus and methodsROCKWELL AUTOMATION TECH INC·Filed 2015·Granted Sep 26, 2017·7 cites·12 claims
- 1094US8497655B2Method and apparatus for estimating rotor position in a sensorless synchronous motorLIU JINGBO·Filed 2012·Granted Jul 30, 2013·11 cites·18 claims
- 1194US6504275B2Electric motor having rotor-embedded sensorRELIANCE ELECTRIC TECH·Filed 2001·Granted Jan 7, 2003·58 cites·59 claims
- 1294US6172498B1Method and apparatus for rotor angle detectionROCKWELL TECH LLC·Filed 1998·Granted Jan 9, 2001·117 cites·8 claims
- 1393US10020766B2Current control of motor drives with output sinewave filterROCKWELL AUTOMATION TECH INC·Filed 2016·Granted Jul 10, 2018·5 cites·15 claims
- 1493US9312779B2Position sensorless open loop control for motor drives with output filter and transformerROCKWELL AUTOMATION TECH INC·Filed 2015·Granted Apr 12, 2016·5 cites·20 claims
- 1593US7227326B1System and method for transient-based motor speed estimation with transient excitationROCKWELL AUTOMATION TECH INC·Filed 2006·Granted Jun 5, 2007·30 cites·34 claims
- 1692US8228013B2Method and apparatus for automatically identifying electrical parameters in a sensor-less PMSMLIU JINGBO·Filed 2008·Granted Jul 24, 2012·28 cites·23 claims
- 1791US9985565B2Sensorless motor drive vector control with feedback compensation for filter capacitor currentROCKWELL AUTOMATION TECH INC·Filed 2016·Granted May 29, 2018·5 cites·20 claims
- 1891US7868581B2Induction motor analysis and control methodROCKWELL AUTOMATION TECH INC·Filed 2008·Granted Jan 11, 2011·20 cites·19 claims
- 1991US4385251AFlux shield for an inductor-alternator machineGEN ELECTRIC·Filed 1981·Granted May 24, 1983·57 cites·7 claims
- 2089US9083274B2Power stage precharging and dynamic braking apparatus for multilevel inverterLIU JINGBO·Filed 2013·Granted Jul 14, 2015·10 cites·20 claims
- 2189US4490780ADigital power converterALLEN BRADLEY CO·Filed 1983·Granted Dec 25, 1984·42 cites·5 claims
- 2285US9054611B2Method and apparatus for stability control of open loop motor drive operationLIU JINGBO·Filed 2013·Granted Jun 9, 2015·6 cites·17 claims
- 2383US7215559B2Method and apparatus to reduce common mode voltages applied to a load by a driveROCKWELL AUTOMATION TECH INC·Filed 2004·Granted May 8, 2007·44 cites·23 claims
- 2482US9880223B2Parameter estimation system and method for an induction motorROCKWELL AUTOMATION TECH INC·Filed 2014·Granted Jan 30, 2018·4 cites·20 claims
- 2582US6218749B1Electric motor having rotor-embedded sensorRELIANCE ELECTRIC TECH·Filed 1998·Granted Apr 17, 2001·46 cites·20 claims
- 2681US9287812B2Method and apparatus for stability control of open loop motor drive operationNONDAHL THOMAS·Filed 2014·Granted Mar 15, 2016·5 cites·20 claims
- 2779US7538507B2System and method for transient-based motor speed estimation with transient excitationROCKWELL INTERNAT TECHNOLOGIES·Filed 2007·Granted May 26, 2009·13 cites·16 claims
- 2879US5347277ADual phase resolver to digital converterALLEN BRADLEY CO·Filed 1992·Granted Sep 13, 1994·44 cites·10 claims
- 2978US7358700B2Induction motor controllerROCKWELL AUTOMATION TECH INC·Filed 2006·Granted Apr 15, 2008·13 cites·5 claims
- 3077US8742767B2Parameter estimation system and method for an induction motorMESSERSMITH DAVID M·Filed 2009·Granted Jun 3, 2014·8 cites·20 claims
- 3172US7944164B2Method and apparatus for identifying orientation of a stationary rotor in a sensor-less PMSMROCKWELL AUTOMATION TECH INC·Filed 2008·Granted May 17, 2011·8 cites·14 claims
- 3271US8203304B2Control method and system with feedback indicative of load fluxLU HAIHUI·Filed 2007·Granted Jun 19, 2012·7 cites·16 claims
- 3368US8159168B2Rotor position estimator for an electrical machineLIU JINGBO·Filed 2009·Granted Apr 17, 2012·7 cites·20 claims
- 3464US9627994B2Cascaded H-bridge (CHB) inverter level shift PWM with rotationROCKWELL AUTOMATION TECH INC·Filed 2015·Granted Apr 18, 2017·1 cites·20 claims
- 3563US10158314B2Feedforward control of motor drives with output sinewave filterROCKWELL AUTOMATION TECH INC·Filed 2017·Granted Dec 18, 2018·1 cites·16 claims
- 3662US8330405B2Method and apparatus for increased current stability in a PWM driveROYAK SEMYON·Filed 2009·Granted Dec 11, 2012·4 cites·20 claims
- 3761US8547050B2Control method and system with feedback indicative of load fluxLU HAIHUI·Filed 2012·Granted Oct 1, 2013·1 cites·13 claims
- 3859US9124209B2Method and apparatus for controlling power converter with inverter output filterLIU JINGBO·Filed 2013·Granted Sep 1, 2015·1 cites·14 claims
- 3956US7672096B2Switching apparatus and methodROCKWELL AUTOMATION TECH INC·Filed 2006·Granted Mar 2, 2010·2 cites·25 claims
- 4047US7915852B2Universal adaptive torque control for PM motors for field-weakening region operationROCKWELL AUTOMATION TECH INC·Filed 2008·Granted Mar 29, 2011·1 cites·24 claims
- 4145US9716460B2Method and apparatus for speed reversal control of motor driveNONDAHL THOMAS·Filed 2015·Granted Jul 25, 2017·0 cites·18 claims
- 4244US7701165B2Induction motor controllerROCKWELL AUTOMATION TECH INC·Filed 2007·Granted Apr 20, 2010·2 cites·19 claims
- 4344US7609014B2System and method for universal adaptive torque control of permanent magnet motorsROCKWELL AUTOMATION TECH INC·Filed 2006·Granted Oct 27, 2009·1 cites·18 claims
- 4438US9800190B2Control of motor drives with output sinewave filter capacitor current compensation using sinewave filter transfer functionROCKWELL AUTOMATION TECH INC·Filed 2016·Granted Oct 24, 2017·0 cites·14 claims
- 4536US2016173012A1Sensorless motor drive vector control with feedback compensation for filter capacitor currentROCKWELL AUTOMATION TECH INC·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →