Inventor

David J. Gritter

Inventor

Wauwatosa, WI, US

Overview

33→

Patents

1976–2019

Patent span

Electricity

Primary field (CPC H)

Patents· 33 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H02Pprimary

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters29%

H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems17%

B60LPropulsion of electrically-propelled vehicles12%

Y02TClimate change mitigation technologies related to transportation12%

H02KDynamo-electric machines9%

H02HEmergency protective circuit arrangements5%

G01RMeasuring electric variables3%

G05BControl or regulating systems in general3%

G01PMeasuring linear or angular speed, acceleration, deceleration, or shock2%

H02JElectric power networks2%

PatentTitleYear

10,491,149Acceleration estimator for speed rate control2019 10,199,973Acceleration estimator for speed rate control2019 8,693,227'Inverter control when feeding high impedance loads'2014 8,120,932'Low voltage ride through'2012 7,778,053'Power system having a voltage regulator with a notch filter'2010 6,977,827'Power system having a phase locked loop with a notch filter'2005 6,621,291'Device and method for estimating the resistance of a stator winding for an AC induction motor'2003 6,611,771'Method and apparatus to detect a stator turn fault in an AC motor'2003 6,420,848'Method and controlling the starting of an AC induction motor with closed loop current control'2002 6,407,529'Method for controlling the starting of an induction motor utilizing closed loop alpha control'2002 6,380,708'Method for controlling the starting of an AC induction motor'2002 6,356,423'Soild state protection circuit for electrical apparatus'2002 5,633,790'DV/DT limiting of inverter output voltage'1997 5,537,308'Digital current regulator'1996 5,461,296'Bumpless rotating start'1995 5,386,186'Stator flux oriented control'1995 5,045,988'Isolated adjustable frequency AC inverter control'1991 4,994,950'Waveform generator for inverter control'1991 4,990,844'DC braking of inverter-driven AC motors'1991 4,958,269'Current control for microprocessor motor drive'1990 4,825,132'Current mode motor control'1989 4,757,225'Dual stack tachometer/generator'1988 4,749,876'Universal power transistor base drive control unit'1988 4,698,562'Motor electrical positioning system and the application thereof within vehicle traction drives'1987 4,651,066'Ferrite permanent magnet electrical machine and the application thereof within vehicle traction drives'1987 4,638,224'Mechanically shifted position senor for self-synchronous machines'1987 4,598,240'Self synchronous motor sensor switching arrangement'1986 4,590,413'EV drivetrain inverter with V/HZ optimization'1986 4,371,824'Base drive and overlap protection circuit'1983 4,041,368'Three-phase, quasi-square wave VSCF induction generator system'1977 4,006,398'Excitation system for multi-phase induction generator'1977 3,982,170'Variable speed, constant frequency induction generator system'1976 3,964,086'Complementary commutation circuit for bipolar inverter'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1977Patents assigned to BORG WARNER (4)· patent assignee history

1976–1977Based in Elmhurst, IL, US· patent location history

1983–2003Patents assigned to EATON CORP (23)· patent assignee history

1983–1987Based in Southfield, MI, US· patent location history

1988–1997Based in Racine, WI, US· patent location history

2002–2019Based in Wauwatosa, WI, US· patent location history

2002Based in Wauwatos, WI, US· patent location history

2005–2012Patents assigned to AMERICAN SUPERCONDUCTOR CORP (3)· patent assignee history

2012–2014Patents assigned to GRITTER DAVID J (2)· patent assignee history

2019Patents assigned to DRS POWER & CONTROL TECH INC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
EATON CORP	23	1983–2003
BORG WARNER	4	1976–1977
AMERICAN SUPERCONDUCTOR CORP	3	2005–2012
DRS POWER & CONTROL TECH INC	2	2019
GRITTER DAVID Jself	2	2012–2014

Locations

Location	Patents	Span
Wauwatosa, WI, US	11	2002–2019
Racine, WI, US	11	1988–1997
Southfield, MI, US	6	1983–1987
Elmhurst, Illinois, US	4	1976–1977
Wauwatos, WI, US	1	2002