Inventor · disambiguated record
Semyon Royak
Also filed as: ROYAK SEMYON
34 granted patents·2 pending applications·649 citations·filing 1997–2017
98Inventor score
Top patents by PatentIndex Score
36 records- 0198US9490738B2Sensorless motor drive vector controlROCKWELL AUTOMATION TECH INC·Filed 2016·Granted Nov 8, 2016·28 cites·16 claims
- 0297US9374028B2Transition scheme for position sensorless control of AC motor drivesROCKWELL AUTOMATION TECH INC·Filed 2014·Granted Jun 21, 2016·21 cites·20 claims
- 0397US9054621B2Position sensorless open loop control for motor drives with output filter and transformerLIU JINGBO·Filed 2013·Granted Jun 9, 2015·18 cites·19 claims
- 0497US6636012B2Stator and rotor resistance identifier using high frequency injectionROCKWELL AUTOMATION TECH INC·Filed 2001·Granted Oct 21, 2003·101 cites·28 claims
- 0596US9294019B2Method and apparatus for controlling power converter with inverter output filterROCKWELL AUTOMATION TECH INC·Filed 2014·Granted Mar 22, 2016·18 cites·19 claims
- 0696US6703809B2Flux position identifier using high frequency injection with the presence of a rich harmonic spectrum in a responding signalROCKWELL AUTOMATION TECH INC·Filed 2002·Granted Mar 9, 2004·76 cites·22 claims
- 0795US9595896B1Methods and systems for sensorless closed loop motor speed and torque controlROCKWELL AUTOMATION TECH INC·Filed 2015·Granted Mar 14, 2017·15 cites·24 claims
- 0895US9318944B2Methods and apparatus for active front end filter capacitor degradation detectionROYAK SEMYON·Filed 2013·Granted Apr 19, 2016·20 cites·20 claims
- 0994US8497655B2Method and apparatus for estimating rotor position in a sensorless synchronous motorLIU JINGBO·Filed 2012·Granted Jul 30, 2013·11 cites·18 claims
- 1094US7479756B2System and method for protecting a motor drive unit from motor back EMF under fault conditionsROCKWELL AUTOMATION TECH INC·Filed 2006·Granted Jan 20, 2009·46 cites·20 claims
- 1193US10020766B2Current control of motor drives with output sinewave filterROCKWELL AUTOMATION TECH INC·Filed 2016·Granted Jul 10, 2018·5 cites·15 claims
- 1293US9312779B2Position 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
- 1392US9240733B2High dynamic control apparatus for current source converterROYAK SEMYON·Filed 2013·Granted Jan 19, 2016·22 cites·14 claims
- 1492US8228013B2Method and apparatus for automatically identifying electrical parameters in a sensor-less PMSMLIU JINGBO·Filed 2008·Granted Jul 24, 2012·28 cites·23 claims
- 1592US8009450B2Method and apparatus for phase current balance in active converter with unbalanced AC line voltage sourceROCKWELL AUTOMATION TECH INC·Filed 2008·Granted Aug 30, 2011·40 cites·20 claims
- 1691US9985565B2Sensorless motor drive vector control with feedback compensation for filter capacitor currentROCKWELL AUTOMATION TECH INC·Filed 2016·Granted May 29, 2018·5 cites·20 claims
- 1788US9041327B2Method and apparatus for overvoltage protection and reverse motor speed control for motor drive power loss eventsBREITZMANN ROBERT J·Filed 2013·Granted May 26, 2015·11 cites·20 claims
- 1885US9054611B2Method and apparatus for stability control of open loop motor drive operationLIU JINGBO·Filed 2013·Granted Jun 9, 2015·6 cites·17 claims
- 1985US5796236ASlip adjuster for use in electrical motor controllersRELIANCE ELECTRIC IND CO·Filed 1997·Granted Aug 18, 1998·54 cites·17 claims
- 2084US8902616B2Active front end power converter with diagnostic and failure prevention using peak detector with decayROYAK SEMYON·Filed 2011·Granted Dec 2, 2014·9 cites·22 claims
- 2181US9287812B2Method and apparatus for stability control of open loop motor drive operationNONDAHL THOMAS·Filed 2014·Granted Mar 15, 2016·5 cites·20 claims
- 2281US6831440B1Flux position identifier using high frequency injectionROCKWELL AUTOMATION TECH INC·Filed 2003·Granted Dec 14, 2004·28 cites·25 claims
- 2377US7355865B2Method and apparatus for rejecting the second harmonic current in an active converter with an unbalanced AC line voltage sourceROCKWELL AUTOMATION TECH INC·Filed 2004·Granted Apr 8, 2008·32 cites·36 claims
- 2472US7944164B2Method 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
- 2570US7106024B2Filter with increased first harmonic response and reduced phase shift in a wide frequency band for encoderless drive applicationsROCKWELL AUTOMATION TECH INC·Filed 2003·Granted Sep 12, 2006·17 cites·26 claims
- 2668US8159168B2Rotor position estimator for an electrical machineLIU JINGBO·Filed 2009·Granted Apr 17, 2012·7 cites·20 claims
- 2764US8115437B2Torque limit of PM motors for field-weakening region operationROYAK SEMYON·Filed 2008·Granted Feb 14, 2012·5 cites·21 claims
- 2863US10158314B2Feedforward control of motor drives with output sinewave filterROCKWELL AUTOMATION TECH INC·Filed 2017·Granted Dec 18, 2018·1 cites·16 claims
- 2962US8330405B2Method and apparatus for increased current stability in a PWM driveROYAK SEMYON·Filed 2009·Granted Dec 11, 2012·4 cites·20 claims
- 3059US9124209B2Method and apparatus for controlling power converter with inverter output filterLIU JINGBO·Filed 2013·Granted Sep 1, 2015·1 cites·14 claims
- 3147US7915852B2Universal adaptive torque control for PM motors for field-weakening region operationROCKWELL AUTOMATION TECH INC·Filed 2008·Granted Mar 29, 2011·1 cites·24 claims
- 3245US9716460B2Method and apparatus for speed reversal control of motor driveNONDAHL THOMAS·Filed 2015·Granted Jul 25, 2017·0 cites·18 claims
- 3344US7609014B2System and method for universal adaptive torque control of permanent magnet motorsROCKWELL AUTOMATION TECH INC·Filed 2006·Granted Oct 27, 2009·1 cites·18 claims
- 3442US2010237817A1Method and Apparatus for Estimating Rotor Position in a Sensorless Synchronous MotorLIU JINGBO·Filed 2009·Application pending·0 cites
- 3538US9800190B2Control 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
- 3636US2016173012A1Sensorless 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 →