Inventor

Harold Robert Schnetzka

Inventor

York, PA, US

Overview

1985–2021

Patent span

Electricity

Primary field (CPC H)

Patents· 65 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 systems16%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters13%

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

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution7%

F25BRefrigeration machines, plants or systems7%

F03DWind motors6%

H02JElectric power networks6%

H02KDynamo-electric machines5%

H02HEmergency protective circuit arrangements4%

H05KPrinted circuits4%

PatentTitleYear

11,114,963Method and system for enhancing electrical power production by a power generation system by controlling switches to place a rotor-side converter in parallel with a line-side converter2021 11,081,891Electrical power systems having reactive power and harmonic support components2021 10,778,112DFIG converter with active filter2020 10,731,630Extended reaction power for wind farms2020 10,662,923Contingency autonomous yaw control for a wind turbine2020 10,570,882Dynamic active and reactive power capability for wind farms2020 10,530,237Energy storage system for renewable energy source2020 10,340,829Electrical power circuit and method of operating same2019 10,148,206Controlling operation of a power converter based on grid conditions2018 10,141,744Cable arrangement of an energy storage system2018 10,110,149Grounding scheme for power converters with silicon carbide MOSFETs2018 10,107,260Wind turbine auxiliary circuit control2018 10,103,665Protection for redundancy of isolated inverter blocks2018 10,104,814System and method for cooling electrical components of a power converter2018 10,075,114System and method for controlling DC link voltage of a power converter2018 10,027,240Ground fault isolation for power converters with silicon carbide MOSFETs2018 9,859,808'Power converter topology for use in an energy storage system'2018 9,793,788'Energy storage system for renewable energy source'2017 9,513,614'Auxiliary electric power system and method of regulating voltages of the same'2016 9,444,448'High performance IGBT gate drive'2016 8,624,213'Optocoupler circuit for gate driver'2014 8,014,110'Variable speed drive with integral bypass contactor'2011 8,004,803'Variable speed drive'2011 7,957,166'Variable speed drive'2011 7,876,561'Cooling systems for variable speed drives and inductors'2011 7,854,596'System and method of operation of multiple screw compressors with continuously variable speed to provide noise cancellation'2010 7,764,041'System and method to extend synchronous operation of an active converter in a variable speed drive'2010 7,746,020'Common mode & differential mode filter for variable speed drive'2010 7,640,767'Low voltage variable speed drive for application on medium/high voltage mains'2010 7,619,906'System for precharging a DC link in a variable speed drive'2009 7,555,912'System for precharging a DC link in a variable speed drive'2009 7,439,702'Application of a switched reluctance motion control system in a chiller system'2008 7,425,806'System and method for controlling a variable speed drive'2008 7,413,413'System and method to reduce acoustic noise in screw compressors'2008 7,387,498'System and method for noise attenuation of screw compressors'2008 7,332,885'Ride-through method and system for HVAC&R chillers'2008 7,208,891'Variable speed drive for a chiller system'2007 7,202,626'Variable speed drive for a chiller system with a switched reluctance motor'2007 7,164,242'Variable speed drive for multiple loads'2007 7,096,681'System and method for variable speed operation of a screw compressor'2006 7,081,734'Ride-through method and system for HVACandR chillers'2006 7,075,268'System and method for increasing output horsepower and efficiency in a motor'2006 7,005,829'System for precharging a DC link in a variable speed drive'2006 7,003,971'Electronic component cooling system for an air-cooled chiller'2006 6,686,718'Control loop and method for variable speed drive ride-through capability improvement'2004 6,434,003'Liquid-cooled power semiconductor device heatsink'2002 6,404,265'Highly efficient driver circuit for a solid state switch'2002 6,404,346'Method and apparatus for detecting a failed thyristor'2002 6,339,352'Anticipatory Schmitt trigger'2002 6,211,792'Method and apparatus detecting a failed thyristor'2001 5,923,143'Solid state motor starter with energy recovery'1999 5,898,554'Switch driver circuit'1999 5,894,736'Methods and apparatuses for detecting surge in centrifugal compressors'1999 5,850,160'Gate drive circuit for an SCR'1998 5,838,144'Solid state, reduced voltage motor starter enabling equalized input/output volt-amp ratings'1998 5,746,062'Methods and apparatuses for detecting surge in centrifugal compressors'1998 5,218,283'AC motor drive system with a two phase power supply'1993 5,146,147'AC motor drive system'1992 5,136,216'AC motor drive system'1992 5,075,838'Energy efficient voltage snubber circuit'1991 4,965,658'System for mounting and cooling power semiconductor devices'1990 4,895,005'Motor terminal box mounted solid state starter'1990 4,864,487'Control for three terminal power semiconductor devices'1989 4,554,463'Trigger circuit for solid state switch'1985 4,499,534'Control system for controlling an SCR network to regulate three-phase A-C power flow'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985Patents assigned to BORG WARNER (2)· patent assignee history

1985–1993Based in Spring Grove, PA, US· patent location history

1989–2009Patents assigned to YORK INT CORP (32)· patent assignee history

1998–2011Based in York, PA, US· patent location history

2008–2014Patents assigned to JOHNSON CONTROLS TECH CO (10)· patent assignee history

2014Patents assigned to ADIGA-MANOOR SHREESHA (1)· patent assignee history

2014–2021Based in Simpsonville, SC, US· patent location history

2016–2021Patents assigned to GEN ELECTRIC (20)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
YORK INT CORP	32	1989–2009
GEN ELECTRIC	20	2016–2021
JOHNSON CONTROLS TECH CO	10	2008–2014
BORG WARNER	2	1985
ADIGA-MANOOR SHREESHA	1	2014

Locations

Location	Patents	Span
York, Pennsylvania, US	35	1998–2011
Simpsonville, SC, US	21	2014–2021
Spring Grove, Pennsylvania, US	9	1985–1993