Inventor

Robert L. Steigerwald

Inventor

Burnt Hills, NY, US

Overview

1976–2021

Patent span

Electricity

Primary field (CPC H)

Patents· 142 as inventor

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

H02Mprimary

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 systems22%

H02JElectric power networks13%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications10%

Y02TClimate change mitigation technologies related to transportation8%

B60LPropulsion of electrically-propelled vehicles8%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%

Y10TTechnical subjects covered by former us classification5%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters4%

H03KPulse technique3%

B60WConjoint control of vehicle sub-units of different type or different function3%

PatentTitleYear

10,994,623Apparatus for energy transfer using converter and method of manufacturing same2021 10,766,372Method and apparatus for charging multiple energy storage devices2020 10,604,023Apparatus for energy transfer using converter and method of manufacturing same2020 10,543,755Apparatus and method for rapid charging using shared power electronics2020 10,454,290Apparatus for transferring energy using onboard power electronics with high-frequency transformer isolation and method of manufacturing same2019 10,377,259Apparatus and method for rapid charging using shared power electronics2019 10,131,234Apparatus for energy transfer using converter and method of manufacturing same2018 10,081,257Method and apparatus for charging multiple energy storage devices2018 10,081,258Method and apparatus for charging multiple energy storage devices2018 9,975,439Apparatus for energy transfer using converter and method of manufacturing same2018 9,914,365'Apparatus and method for rapid charging using shared power electronics'2018 9,821,668'Method and apparatus for charging multiple energy storage devices'2017 9,809,121'Apparatus for energy transfer using converter and method of manufacturing same'2017 9,789,780'Apparatus and method for rapid charging using shared power electronics'2017 9,620,974'Apparatus for transferring energy using power electronics and machine inductance and method of manufacturing same'2017 9,595,888'System and method to avoid reverse recovery in a power converter'2017 9,321,367'Apparatus for energy transfer using converter and method of manufacturing same'2016 9,290,097'Apparatus for transferring energy using onboard power electronics with high-frequency transformer isolation and method of manufacturing same'2016 9,238,415'Apparatus for rapid charging using onboard power electronics and method of manufacturing same'2016 9,227,523'Apparatus for energy transfer using converter and method of manufacturing same'2016 9,120,393'Apparatus for energy transfer using converter and method of manufacturing same'2015 9,120,390'Apparatus for transferring energy using onboard power electronics and method of manufacturing same'2015 9,024,573'Apparatus for energy transfer using converter and method of manufacturing same'2015 9,025,352'Transformer tap-changing circuit and method of making same'2015 8,698,451'Apparatus and method for rapid charging using shared power electronics'2014 8,653,696'Apparatus for transferring energy using power electronics and machine inductance and method of manufacturing same'2014 8,644,037'AC-AC converter with high frequency link'2014 8,487,582'Apparatus for transferring energy using onboard power electronics and method of manufacturing same'2013 8,421,271'Apparatus for transferring energy using onboard power electronics and method of manufacturing same'2013 8,378,623'Apparatus and method for charging an electric vehicle'2013 8,330,299'DC to DC power converters and methods of controlling the same'2012 8,208,274'Alternating current to direct current power conversion'2012 8,138,694'Bidirectional buck-boost power converters'2012 8,080,973'Apparatus for energy transfer using converter and method of manufacturing same'2011 8,030,884'Apparatus for transferring energy using onboard power electronics and method of manufacturing same'2011 8,023,297'High efficiency photovoltaic inverter'2011 7,932,633'Apparatus for transferring energy using power electronics and machine inductance and method of manufacturing same'2011 7,869,237'Phase-shifted bridge with auxiliary circuit to maintain zero-voltage-switching'2011 7,859,870'Voltage clamps for energy snubbing'2010 7,741,591'Optically powered drive circuit and method for controlling a semiconductor switch'2010 7,609,532'Phase-shifted PWM bridge with switchable inductors to maintain zero-voltage switching at light load'2009 RE040907'Ripple cancellation circuit for ultra-low-noise power supplies'2009 7,465,872'Photovoltaic power converter system with a controller configured to actively compensate load harmonics'2008 7,449,668'Optically powered drive circuit and method for controlling a semiconductor switch'2008 7,400,061'Soft switched secondary side post regulator for DC to DC converter'2008 7,336,059'System and method for charging and discharging a superconducting coil'2008 7,331,803'Power control system and method'2008 7,327,113'Electric starter generator system employing bidirectional buck-boost power converters, and methods therefor'2008 7,142,440'Ripple-current reduction for transformers'2006 7,132,757'Power control system and method'2006 7,016,205'Ripple-current reduction schemes for AC converters'2006 7,007,898'Method and apparatus for railcar data acquisition and communication'2006 6,930,483'Method/system for switched frequency ripple reduction in MRI gradient coils'2005 6,735,094'Low-noise multi-output power supply circuit featuring efficient linear regulators and method of design'2004 6,693,805'Ripple cancellation circuit for ultra-low-noise power supplies'2004 6,583,705'High current inductor and method for making same'2003 6,556,462'High power factor converter with a boost circuit having continuous/discontinuous modes'2003 6,369,535'Method and apparatus for current shaping in electronically commutated motors'2002 6,262,905'Secondary-side controlled resonant AC voltage regulator module'2001 6,166,602'High-efficiency switching power amplifier'2000 6,040,753'Ultra-low-profile tube-type magnetics'2000 6,031,747'Interleaved synchronous flyback converter with high efficiency over a wide operating load range'2000 6,031,746'Switching amplifier for generating continuous arbitrary waveforms for magnetic resonance imaging coils'2000 5,952,832'Diagnostic circuit and method for predicting fluorescent lamp failure by monitoring filament currents'1999 5,910,709'Florescent lamp ballast control for zero -voltage switching operation over wide input voltage range and over voltage protection'1999 5,812,384'Matrix filters for low-noise power distribution systems'1998 5,781,421'High-frequency, high-efficiency converter with recirculating energy control for high-density power conversion'1998 5,773,966'Dual-mode, high-efficiency dc-dc converter useful for portable battery-operated equipment'1998 5,703,441'Multi-function filament-heater power supply for an electronic ballast for long-life dimmerable lamps'1997 5,701,059'Elimination of striations in fluorescent lamps driven by high-frequency ballasts'1997 5,608,771'Contactless power transfer system for a rotational load'1997 5,594,629'High-frequency switching circuits operable in a natural zero-voltage switching mode'1997 5,576,940'Front-end power converter for distributed power systems'1996 5,570,074'Very low leakage inductance, single-laminate transformer'1996 5,568,368'Square-wave converters with soft voltage transitions for ac power distribution systems'1996 5,546,294'Resonant converter with wide load range'1996 5,514,921'Lossless gate drivers for high-frequency PWM switching cells'1996 5,481,449'Efficient, high power density, high power factor converter for very low dc voltage applications'1996 5,451,962'Boost regulated capacitor multiplier for pulse load'1995 5,414,238'Resonant power supply for an arcjet thruster'1995 5,377,090'Pulsed power converter with multiple output voltages'1994 5,359,180'Power supply system for arcjet thrusters'1994 5,352,861'Resonant high-voltage pulser for arcjet thruster ignition'1994 5,302,862'Efficient transformer-coupled gate driver circuit for power FET\'s'1994 5,283,727'Independent control of the AC line current and output DC voltage of a high power factor AC-to-DC converter'1994 5,274,539'Capacitance-multiplying converters for supplying distributed pulsed loads'1993 5,179,512'Gate drive for synchronous rectifiers in resonant converters'1993 5,119,283'High power factor, voltage-doubler rectifier'1992 5,113,337'High power factor power supply'1992 5,073,848'Power distribution system'1991 5,060,130'High-efficiency, high-density, power supply including an input boost power supply'1991 5,038,264'Multiple-output, single-ended, resonant power converter'1991 5,010,261'Lossless gate driver circuit for a high frequency converter'1991 4,967,109'High efficiency gate driver circuit for a high frequency converter'1990 4,912,622'Gate driver for a full-bridge lossless switching device'1990 4,903,189'Low noise, high frequency synchronous rectifier'1990 4,876,635'Series resonant inverter with lossless snubber-resetting components'1989 4,864,479'Full-bridge lossless switching converter'1989 4,845,605'High-frequency DC-DC power converter with zero-voltage switching of single primary-side power device'1989 4,825,348'Resonant power converter with current sharing among multiple transformers'1989 4,796,173'Low input voltage resonant power converter with high-voltage A.C. link'1989 4,758,940'Control circuit for insuring super-resonant operation of resonant converter'1988 4,733,104'Integrated circuit for controlling power converter by frequency modulation and pulse width modulation'1988 4,695,934'Multiple output resonant power supply'1987 4,694,384'HVIC power supply controller with primary-side edge detector'1987 4,684,867'Regenerative unipolar converter for switched reluctance motors using one main switching device per phase'1987 4,685,040'Integrated circuit for controlling power converter by frequency modulation and pulse width modulation'1987 4,672,528'Resonant inverter with improved control'1987 4,642,745'Power circuit with high input power factor and a regulated output'1987 4,628,426'Dual output DC-DC converter with independently controllable output voltages'1986 4,581,542'Driver circuits for emitter switch gate turn-off SCR devices'1986 4,541,041'Full load to no-load control for a voltage fed resonant inverter'1985 4,504,895'Regulated dc-dc converter using a resonating transformer'1985 4,477,868'High frequency series resonant dc-dc converter'1984 4,460,949'High frequency parallel resonant dc-dc converter'1984 4,456,839'High gain latching Darlington transistor'1984 4,445,049'Inverter for interfacing advanced energy sources to a utility grid'1984 4,426,564'Parallel resonant induction cooking surface unit'1984 4,424,557'Full bridge PWM inverter with distributed device switching'1984 4,404,472'Maximum power control for a solar array connected to a load'1983 4,390,769'Induction heating apparatus providing smooth power control'1983 4,386,394'Single phase and three phase AC to DC converters'1983 4,374,355'Electrically isolated battery charger for on-board electric vehicle applications'1983 4,347,464'FET Motor drive system'1982 4,346,431'Field controlled thyristor switching power supply'1982 4,339,671'Proportional base drive circuit'1982 4,323,962'High efficiency rectifier with multiple outputs'1982 4,295,059'High gain latching Darlington transistor'1981 4,292,578'Combination field chopper and battery charger'1981 4,288,732'Forced commutated starting circuit for load commutated inverter drive system'1981 4,253,054'Phase controlled rectifier circuit for rapidly charging batteries'1981 4,244,017'Third harmonic auxiliary commutated inverter having selectable commutation capacitance as a function of load current'1981 4,241,250'Induction cooking system'1980 4,224,535'Efficient base drive circuit for high current transistors'1980 4,211,969'High efficiency circuit for rapidly charging batteries'1980 4,047,138'Power inductor and transformer with low acoustic noise air gap'1977 4,042,856'Chopper ballast for gaseous discharge lamps with auxiliary capacitor energy storage'1977 4,039,914'Dynamic braking in controlled current motor drive systems'1977 4,039,926'Current fed inverter with commutation independent of load inductance'1977 3,987,356'Controlled capacitive filter for active loads'1976 3,940,633'GTO turn-off circuit providing turn-off gate current pulse proportional to anode current'1976 3,940,682'Rectifier circuits using transistors as rectifying elements'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2021Patents assigned to GEN ELECTRIC (127)· patent assignee history

1976–1988Based in Scotia, NY, US· patent location history

1987–2021Based in Burnt Hills, NY, US· patent location history

2000–2011Patents assigned to LOCKHEED CORP (6)· patent assignee history

2011–2018Patents assigned to KING ROBERT DEAN (12)· patent assignee history

2012–2016Patents assigned to STEIGERWALD ROBERT LOUIS (13)· patent assignee history

2012–2014Patents assigned to GARCES LUIS JOSE (3)· patent assignee history

2017–2020Based in Schenectady, NY, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GEN ELECTRIC	127	1976–2021
STEIGERWALD ROBERT LOUISself	13	2012–2016
KING ROBERT DEAN	12	2011–2018
LOCKHEED CORP	6	2000–2011
GARCES LUIS JOSE	3	2012–2014

Locations

Location	Patents	Span
Burnt Hills, New York, US	99	1987–2021
Scotia, New York, US	39	1976–1988
Schenectady, New York, US	4	2017–2020