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David Leggate
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New Berlin, WI, US
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Patents Grants
last 30 patents
Information
Patent Grant
Calculating a load resistance
Patent number
10,527,661
Issue date
Jan 7, 2020
Rockwell Automation Technologies, Inc.
David Leggate
G01 - MEASURING TESTING
Information
Patent Grant
Adaptive harmonic elimination compensation for voltage distortion e...
Patent number
10,250,161
Issue date
Apr 2, 2019
Rockwell Automation Technologies, Inc.
David Leggate
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Inverter phase current reconstruction apparatus and methods
Patent number
9,584,043
Issue date
Feb 28, 2017
Rockwell Automation Technologies, Inc.
Zhendong Zhang
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for ripple and phase loss detection
Patent number
9,036,382
Issue date
May 19, 2015
Rockwell Automation Technologies, Inc.
Bing Li
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Discontinuous pulse width drive modulation method and apparatus for...
Patent number
8,503,207
Issue date
Aug 6, 2013
Rockwell Automation Technologies, Inc.
Rangarajan M. Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Pulse width modulation control method and system for mitigating ref...
Patent number
8,488,345
Issue date
Jul 16, 2013
Rockwell Automation Technologies, Inc.
Rangarajan M. Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Systems and methods for common-mode voltage reduction in fully rege...
Patent number
8,107,267
Issue date
Jan 31, 2012
Rockwell Automation Technologies, Inc.
Rangarajan Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Systems and methods for reducing AC drive common-mode currents
Patent number
7,881,081
Issue date
Feb 1, 2011
Rockwell Automation Technologies, Inc.
Rangarajan M. Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Systems and methods for common-mode voltage reduction in AC drives
Patent number
7,738,267
Issue date
Jun 15, 2010
Rockwell Automation Technologies, Inc.
Rangarajan Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for adjustable voltage/adjustable frequency in...
Patent number
7,626,836
Issue date
Dec 1, 2009
Rockwell Automation Technologies, Inc.
David Leggate
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
System and method for adjustable carrier waveform generator
Patent number
7,342,380
Issue date
Mar 11, 2008
Rockwell Automation Technologies, Inc.
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for controlling reflected voltage using a moto...
Patent number
6,819,070
Issue date
Nov 16, 2004
Rockwell Automation Technologies, Inc.
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for compensating for device dynamics by adjust...
Patent number
6,617,821
Issue date
Sep 9, 2003
Rockwell Automation Technologies, Inc.
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Angle control of modulating wave to reduce reflected wave overvolta...
Patent number
6,541,933
Issue date
Apr 1, 2003
Rockwell Automation Technologies, Inc.
David Leggate
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for compensating for device dynamics in invert...
Patent number
6,477,067
Issue date
Nov 5, 2002
Rockwell Automation Technologies, Inc.
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for compensating for device dynamics and volta...
Patent number
6,469,916
Issue date
Oct 22, 2002
Rockwell Automation Technologies, Inc.
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for determining a critical dwell time for use...
Patent number
6,014,497
Issue date
Jan 11, 2000
Allen Bradley Company, LLC
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Apparatus for controlling reflected voltage on motor supply lines
Patent number
5,990,658
Issue date
Nov 23, 1999
Allen Bradley Company, LLC
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Apparatus for reducing the effects of turn on delay errors in motor...
Patent number
5,917,721
Issue date
Jun 29, 1999
Allen Bradley Company, LLC
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for controlling reflected voltage using a moto...
Patent number
5,912,813
Issue date
Jun 15, 1999
Allen Bradley Company, LLC
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Method and apparatus for controlling voltage reflections using a mo...
Patent number
5,671,130
Issue date
Sep 23, 1997
Allen-Bradley Company, Inc.
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Apparatus used with AC motors for compensating for turn on delay er...
Patent number
5,625,550
Issue date
Apr 29, 1997
Allen-Bradley Company, Inc.
David Leggate
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Compensated feedforward voltage for a PWM AC motor drive
Patent number
5,329,217
Issue date
Jul 12, 1994
Allen-Bradley Company, Inc.
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
PWM control in the pulse dropping region
Patent number
5,121,043
Issue date
Jun 9, 1992
Allen-Bradley Company, Inc.
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Patents Applications
last 30 patents
Information
Patent Application
CALCULATING A LOAD RESISTANCE
Publication number
20190242934
Publication date
Aug 8, 2019
Rockwell Automation Technologies, Inc.
David Leggate
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
INVERTER PHASE CURRENT RECONSTRUCTION APPARATUS AND METHODS
Publication number
20160254760
Publication date
Sep 1, 2016
Rockwell Automation Technologies, Inc.
Zhendong Zhang
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
METHOD AND APPARATUS FOR RIPPLE AND PHASE LOSS DETECTION
Publication number
20140254217
Publication date
Sep 11, 2014
Rockwell Automation Technologies, Inc.
Bing Li
G01 - MEASURING TESTING
Information
Patent Application
PULSE WIDTH MODULATION CONTROL METHOD AND SYSTEM FOR MITIGATING REF...
Publication number
20120140532
Publication date
Jun 7, 2012
ROCKWELL AUTOMATION TECHNOLOGIES, INC.
Rangarajan M. Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
DISCONTINUOUS PULSE WIDTH DRIVE MODULATION METHOD AND APPARATUS
Publication number
20120075892
Publication date
Mar 29, 2012
Rockwell Automation Technologies, Inc.
Rangarajan M. Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
SYSTEMS AND METHODS FOR COMMON-MODE VOLTAGE REDUCTION IN FULLY REGE...
Publication number
20100172162
Publication date
Jul 8, 2010
ROCKWELL AUTOMATION TECHNOLOGIES, INC.
Rangarajan Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
SYSTEMS AND METHODS FOR COMMON-MODE VOLTAGE REDUCTION IN AC DRIVES
Publication number
20100172161
Publication date
Jul 8, 2010
ROCKWELL AUTOMATION TECHNOLOGIES, INC.
Rangarajan Tallam
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
SYSTEM AND METHOD FOR ADJUSTABLE CARRIER WAVEFORM GENERATOR
Publication number
20080054841
Publication date
Mar 6, 2008
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Method and apparatus for adjustable voltage/adjustable frequency in...
Publication number
20070091653
Publication date
Apr 26, 2007
David Leggate
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Method and apparatus for controlling reflected voltage using a moto...
Publication number
20040160207
Publication date
Aug 19, 2004
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
Method and apparatus for compensating for device dynamics by adjust...
Publication number
20030052642
Publication date
Mar 20, 2003
Russel J. Kerkman
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER