Ronald J. Krefta

Person

Fort Wayne, IN, US

People

Patents Grantslast 30 patents

Information Patent Grant
System and method for modeling thermal circuits
- Patent number 11,423,203
- Issue date Aug 23, 2022
- DELPHI TECHNOLOGIES IP LIMITED
- Lijun Zheng
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
System and method for error correction in angular position sensors
- Patent number 9,463,713
- Issue date Oct 11, 2016
- Allison Transmission, Inc.
- James E. Walters
- B60 - VEHICLES IN GENERAL
Information Patent Grant
System and method for error correction in angular position sensors
- Patent number 9,260,036
- Issue date Feb 16, 2016
- Allison Transmission, Inc.
- James E. Walters
- B60 - VEHICLES IN GENERAL
Information Patent Grant
System and method for controlling an injection time of a fuel injec...
- Patent number 8,656,890
- Issue date Feb 25, 2014
- Delphi Technologies, Inc.
- Philippe S. Farah
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Method and apparatus for characterizing fuel injector performance t...
- Patent number 7,945,374
- Issue date May 17, 2011
- Delphi Technologies, Inc.
- Kevin R. Keegan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Stator winding pattern for reduced magnetic noise
- Patent number 6,864,667
- Issue date Mar 8, 2005
- Delphi Technologies, Inc.
- Duane Joseph Buening
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and system for controlling a permanent magnet machine during...
- Patent number 6,741,060
- Issue date May 25, 2004
- Delphi Technologies, Inc.
- Ronald John Krefta
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Method and system for controlling start of a permanent magnet machine
- Patent number 6,639,371
- Issue date Oct 28, 2003
- Delphi Technologies, Inc.
- James E. Walters
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and system for controlling a synchronous machine using a cha...
- Patent number 6,577,097
- Issue date Jun 10, 2003
- Delphi Technologies, Inc.
- Ronald John Krefta
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Hybrid electrical machine with axially extending magnets
- Patent number 6,538,358
- Issue date Mar 25, 2003
- Delphi Technologies, Inc.
- Ronald John Krefta
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Hybrid twin coil electrical machine
- Patent number 6,455,978
- Issue date Sep 24, 2002
- Delphi Technologies, Inc.
- Ronald John Krefta
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Hybrid electrical machine with axial flux magnet
- Patent number 6,437,477
- Issue date Aug 20, 2002
- Delphi Technologies, Inc.
- Ronald John Krefta
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Drive circuit and method for driving a switched reluctance machine
- Patent number 6,342,772
- Issue date Jan 29, 2002
- Delphi Technologies, Inc.
- Gabriel Gallegos-Lopez
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
High-resolution incremental position sensor with pulse switching st...
- Patent number 6,232,739
- Issue date May 15, 2001
- Delphi Technologies, Inc.
- Ronald John Krefta
- G01 - MEASURING TESTING
Information Patent Grant
Multiphase electrical motor, control and method using overlapping c...
- Patent number 5,821,722
- Issue date Oct 13, 1998
- General Electric Company
- Franklin L. Forbes
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electronically commutated motor having an increased flat top width...
- Patent number 4,950,960
- Issue date Aug 21, 1990
- General Electric Company
- Ronald J. Krefta
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electronically commutated motor having skewed magnetics
- Patent number 4,933,584
- Issue date Jun 12, 1990
- General Electric Company
- Harold B. Harms
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
SYSTEM AND METHOD FOR MODELING THERMAL CIRCUITS
- Publication number 20210026929
- Publication date Jan 28, 2021
- DELPHI TECHNOLOGIES IP LIMITED
- Lijun Zheng
- G01 - MEASURING TESTING
Information Patent Application
ELECTRIC MOTOR DRIVER WITH CURRENT SENSOR ERROR CORRECTION
- Publication number 20160276969
- Publication date Sep 22, 2016
- Delphi Technologies, Inc.
- RONALD J. KREFTA
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
SYSTEM AND METHOD FOR ERROR CORRECTION IN ANGULAR POSITION SENSORS
- Publication number 20160193941
- Publication date Jul 7, 2016
- James E. Walters
- B60 - VEHICLES IN GENERAL
Information Patent Application
SYSTEM AND METHOD FOR ERROR CORRECTION IN ANGULAR POSITION SENSORS
- Publication number 20150158396
- Publication date Jun 11, 2015
- James E. Walters
- B60 - VEHICLES IN GENERAL
Information Patent Application
METHOD TO ESTIMATE POWER DISSIPATION OF AN INVERTER
- Publication number 20140350871
- Publication date Nov 27, 2014
- RONALD J. KREFTA
- G01 - MEASURING TESTING
Information Patent Application
System and Method for Controlling an Injection Time of a Fuel Injec...
- Publication number 20110251777
- Publication date Oct 13, 2011
- Delphi Technologies, Inc.
- PHILIPPE S. FARAH
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
METHOD AND APPARATUS FOR CHARACTERIZING FUEL INJECTOR PERFORMANCE T...
- Publication number 20100145597
- Publication date Jun 10, 2010
- Kevin R. Keegan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
Hybrid electrical machine with system and method for controlling su...
- Publication number 20040012354
- Publication date Jan 22, 2004
- Ronald J. Krefta
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
Composite power metal stator sleeve
- Publication number 20030193260
- Publication date Oct 16, 2003
- Frederick B. Reiter
- B22 - CASTING POWDER METALLURGY
Information Patent Application
Five phase alternating current generator
- Publication number 20030057789
- Publication date Mar 27, 2003
- Duane Joseph Buening
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Method and system for controlling start of a permanent magnet machine
- Publication number 20030034748
- Publication date Feb 20, 2003
- James E. Walters
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Method and system for controlling a synchronous machine using a cha...
- Publication number 20030034755
- Publication date Feb 20, 2003
- Ronald John Krefta
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
Method and system for controlling a permanent magnet machine during...
- Publication number 20020145837
- Publication date Oct 10, 2002
- Ronald John Krefta
- B60 - VEHICLES IN GENERAL
Information Patent Application
Stator winding pattern for reduced magnetic noise
- Publication number 20020093266
- Publication date Jul 18, 2002
- Duane Joseph Buening
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Ronald J. Krefta

Person

Patents Grantslast 30 patents

System and method for modeling thermal circuits

System and method for error correction in angular position sensors

System and method for error correction in angular position sensors

System and method for controlling an injection time of a fuel injec...

Method and apparatus for characterizing fuel injector performance t...

Stator winding pattern for reduced magnetic noise

Method and system for controlling a permanent magnet machine during...

Method and system for controlling start of a permanent magnet machine

Method and system for controlling a synchronous machine using a cha...

Hybrid electrical machine with axially extending magnets

Hybrid twin coil electrical machine

Hybrid electrical machine with axial flux magnet

Drive circuit and method for driving a switched reluctance machine

High-resolution incremental position sensor with pulse switching st...

Multiphase electrical motor, control and method using overlapping c...

Electronically commutated motor having an increased flat top width...

Electronically commutated motor having skewed magnetics

Patents Applicationslast 30 patents

SYSTEM AND METHOD FOR MODELING THERMAL CIRCUITS

ELECTRIC MOTOR DRIVER WITH CURRENT SENSOR ERROR CORRECTION

SYSTEM AND METHOD FOR ERROR CORRECTION IN ANGULAR POSITION SENSORS

SYSTEM AND METHOD FOR ERROR CORRECTION IN ANGULAR POSITION SENSORS

METHOD TO ESTIMATE POWER DISSIPATION OF AN INVERTER

System and Method for Controlling an Injection Time of a Fuel Injec...

METHOD AND APPARATUS FOR CHARACTERIZING FUEL INJECTOR PERFORMANCE T...

Hybrid electrical machine with system and method for controlling su...

Composite power metal stator sleeve

Five phase alternating current generator

Method and system for controlling start of a permanent magnet machine

Method and system for controlling a synchronous machine using a cha...

Method and system for controlling a permanent magnet machine during...

Stator winding pattern for reduced magnetic noise