Inventor · disambiguated record
David Leggate
Also filed as: LEGGATE DAVID
24 granted patents·808 citations·filing 1990–2018
97Inventor score
Files withROCKWELL AUTOMATION TECH INC12ALLEN BRADLEY CO8TALLAM RANGARAJAN M2LI BING1TALLAM RANGARAJAN1
Top patents by PatentIndex Score
24 records- 0196US7738267B1Systems and methods for common-mode voltage reduction in AC drivesROCKWELL AUTOMATION TECH INC·Filed 2009·Granted Jun 15, 2010·55 cites·20 claims
- 0295US8107267B2Systems and methods for common-mode voltage reduction in fully regenerative AC drivesTALLAM RANGARAJAN·Filed 2009·Granted Jan 31, 2012·59 cites·21 claims
- 0395US7881081B1Systems and methods for reducing AC drive common-mode currentsROCKWELL AUTOMATION TECH INC·Filed 2010·Granted Feb 1, 2011·29 cites·23 claims
- 0492US8503207B2Discontinuous pulse width drive modulation method and apparatus for reduction of common-mode voltage in power conversion systemsTALLAM RANGARAJAN M·Filed 2010·Granted Aug 6, 2013·14 cites·19 claims
- 0591US7342380B1System and method for adjustable carrier waveform generatorROCKWELL AUTOMATION TECH INC·Filed 2006·Granted Mar 11, 2008·25 cites·22 claims
- 0691US6469916B1Method and apparatus for compensating for device dynamics and voltage drop in inverter based control systemsROCKWELL AUTOMATION TECH INC·Filed 2001·Granted Oct 22, 2002·73 cites·28 claims
- 0790US10250161B1Adaptive harmonic elimination compensation for voltage distortion elementsROCKWELL AUTOMATION TECH INC·Filed 2018·Granted Apr 2, 2019·6 cites·19 claims
- 0887US6541933B1Angle control of modulating wave to reduce reflected wave overvoltage transientsROCKWELL AUTOMATION TECH INC·Filed 2001·Granted Apr 1, 2003·59 cites·22 claims
- 0987US6477067B1Method and apparatus for compensating for device dynamics in inverter based control systemsROCKWELL AUTOMATION TECH INC·Filed 2001·Granted Nov 5, 2002·57 cites·24 claims
- 1086US9036382B2Method and apparatus for ripple and phase loss detectionLI BING·Filed 2013·Granted May 19, 2015·8 cites·19 claims
- 1185US9584043B2Inverter phase current reconstruction apparatus and methodsROCKWELL AUTOMATION TECH INC·Filed 2015·Granted Feb 28, 2017·5 cites·20 claims
- 1285US8488345B2Pulse width modulation control method and system for mitigating reflected wave effects in over-modulation regionTALLAM RANGARAJAN M·Filed 2010·Granted Jul 16, 2013·8 cites·27 claims
- 1385US7626836B2Method and apparatus for adjustable voltage/adjustable frequency inverter controlROCKWELL AUTOMATION TECH INC·Filed 2005·Granted Dec 1, 2009·25 cites·32 claims
- 1484US6819070B2Method and apparatus for controlling reflected voltage using a motor controllerROCKWELL AUTOMATION TECH INC·Filed 2003·Granted Nov 16, 2004·47 cites·21 claims
- 1584US6617821B2Method and apparatus for compensating for device dynamics by adjusting inverter carrier frequencyROCKWELL AUTOMATION TECH INC·Filed 2001·Granted Sep 9, 2003·33 cites·21 claims
- 1684US5329217ACompensated feedforward voltage for a PWM AC motor driveALLEN BRADLEY CO·Filed 1992·Granted Jul 12, 1994·49 cites·7 claims
- 1779US5912813AMethod and apparatus for controlling reflected voltage using a motor controllerALLEN BRADLEY CO·Filed 1997·Granted Jun 15, 1999·61 cites·17 claims
- 1874US5917721AApparatus for reducing the effects of turn on delay errors in motor controlALLEN BRADLEY CO·Filed 1997·Granted Jun 29, 1999·48 cites·9 claims
- 1968US6014497AMethod and apparatus for determining a critical dwell time for use in motor controlsALLEN BRADLEY CO·Filed 1997·Granted Jan 11, 2000·36 cites·17 claims
- 2068US5671130AMethod and apparatus for controlling voltage reflections using a motor controllerALLEN BRADLEY CO·Filed 1996·Granted Sep 23, 1997·36 cites·22 claims
- 2167US5121043APWM control in the pulse dropping regionALLEN BRADLEY CO·Filed 1990·Granted Jun 9, 1992·26 cites·8 claims
- 2266US5990658AApparatus for controlling reflected voltage on motor supply linesALLEN BRADLEY CO·Filed 1998·Granted Nov 23, 1999·26 cites·12 claims
- 2365US5625550AApparatus used with AC motors for compensating for turn on delay errorsALLEN BRADLEY CO·Filed 1994·Granted Apr 29, 1997·23 cites·24 claims
- 2455US10527661B2Calculating a load resistanceROCKWELL AUTOMATION TECH INC·Filed 2018·Granted Jan 7, 2020·0 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →