Patents by Inventor Gary Skibinski

Gary Skibinski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11233475
    Abstract: A precharge system for precharging a DC bus circuit includes a first input, first and second circuit branches, and a controller, where the first circuit branch includes a first contactor between the first input and an AC to DC converter, the second circuit branch has: a disconnect switch coupled to the first input; a variable frequency drive (VFD) with an AC input coupled to the disconnect switch; an inductor coupled to an AC output of the VFD; and a second contactor coupled to the inductor. The precharge VFD provides precise control of the precharge operation such as charging time, current limiting, short-circuit and ground fault protection, monitoring DC Bus capacitance and verifies the health of the shared DC bus circuit through startup diagnostic.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: January 25, 2022
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: James J Valasek, Nickolay Guskov, Gary Skibinski
  • Publication number: 20210359632
    Abstract: A precharge system for precharging a DC bus circuit includes a first input, first and second circuit branches, and a controller, where the first circuit branch includes a first contactor between the first input and an AC to DC converter, the second circuit branch has: a disconnect switch coupled to the first input; a variable frequency drive (VFD) with an AC input coupled to the disconnect switch; an inductor coupled to an AC output of the VFD; and a second contactor coupled to the inductor. The precharge VFD provides precise control of the precharge operation such as charging time, current limiting, short-circuit and ground fault protection, monitoring DC Bus capacitance and verifies the health of the shared DC bus circuit through startup diagnostic.
    Type: Application
    Filed: May 14, 2020
    Publication date: November 18, 2021
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: James J. Valasek, Nickolay Guskov, Gary Skibinski
  • Patent number: 9621094
    Abstract: A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a DC voltage input to generate a desired AC voltage output. Capacitors are connected in parallel between each output phase and a common connection, which may be a ground connection. The magnitude and layout of the capacitors are selected to minimize current conducted by the capacitors. The capacitors may be surface mount technology located proximate to the switching devices or the capacitors may be incorporated in the circuit board on which the switching devices are mounted. The filter may be applied to any of the switching elements in a motor drive, such as the inverter section, an active rectifier section, or a switched mode power supply.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: April 11, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Zoran Vrankovic, Craig Winterhalter, Gary Skibinski
  • Patent number: 9612269
    Abstract: A method is provided for detection of a ground fault in a high resistance network in a voltage source power conversion circuit comprising a power converter that converts incoming AC power to DC power applied to a DC bus and an inverter that converts DC power from the DC bus to output AC power. The method includes detecting a midpoint-to-ground voltage between a low side of the DC bus and a ground potential and detecting the presence of a ground fault in a high resistance network based upon the detected midpoint-to-ground voltage.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: April 4, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Lixiang Wei, Zhijun Liu, Brian Patrick Brown, David W. Kirschnik, Russ J. Kerkman, Richard A. Lukaszewski, Gary Skibinski, Carlos Daniel Rodriguez-Valdez
  • Publication number: 20150145463
    Abstract: A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a DC voltage input to generate a desired AC voltage output. Capacitors are connected in parallel between each output phase and a common connection, which may be a ground connection. The magnitude and layout of the capacitors are selected to minimize current conducted by the capacitors. The capacitors may be surface mount technology located proximate to the switching devices or the capacitors may be incorporated in the circuit board on which the switching devices are mounted. The filter may be applied to any of the switching elements in a motor drive, such as the inverter section, an active rectifier section, or a switched mode power supply.
    Type: Application
    Filed: February 4, 2015
    Publication date: May 28, 2015
    Inventors: Zoran Vrankovic, Craig Winterhalter, Gary Skibinski
  • Patent number: 8970148
    Abstract: A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a DC voltage input to generate a desired AC voltage output. Capacitors are connected in parallel between each output phase and a common connection, which may be a ground connection. The magnitude and layout of the capacitors are selected to minimize current conducted by the capacitors. The capacitors may be surface mount technology located proximate to the switching devices or the capacitors may be incorporated in the circuit board on which the switching devices are mounted. The filter may be applied to any of the switching elements in a motor drive, such as the inverter section, an active rectifier section, or a switched mode power supply.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: March 3, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Zoran Vrankovic, Craig Winterhalter, Gary Skibinski
  • Publication number: 20140225625
    Abstract: A method is provided for detection of a ground fault in a high resistance network in a voltage source power conversion circuit comprising a power converter that converts incoming AC power to DC power applied to a DC bus and an inverter that converts DC power from the DC bus to output AC power. The method includes detecting a midpoint-to-ground voltage between a low side of the DC bus and a ground potential and detecting the presence of a ground fault in a high resistance network based upon the detected midpoint-to-ground voltage.
    Type: Application
    Filed: April 14, 2014
    Publication date: August 14, 2014
    Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
    Inventors: Lixiang Wei, Zhijun Liu, Brian Patrick Brown, David W. Kirschnik, Russ J. Kerkman, Richard A. Lukaszewski, Gary Skibinski, Carlos Daniel Rodriguez-Valdez
  • Patent number: 8698504
    Abstract: A method is provided for detection of a ground fault in a high resistance network in a voltage source power conversion circuit comprising a power converter that converts incoming AC power to DC power applied to a DC bus and an inverter that converts DC power from the DC bus to output AC power. The method includes detecting a midpoint-to-ground voltage between a low side of the DC bus and a ground potential and detecting the presence of a ground fault in a high resistance network based upon the detected midpoint-to-ground voltage.
    Type: Grant
    Filed: October 9, 2010
    Date of Patent: April 15, 2014
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Lixiang Wei, Zhijun Liu, Brian Patrick Brown, David W. Kirschnik, Russ J. Kerkman, Richard A. Lukaszewski, Gary Skibinski, Carlos Daniel Rodriguez-Valdez
  • Publication number: 20140035497
    Abstract: A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a DC voltage input to generate a desired AC voltage output. Capacitors are connected in parallel between each output phase and a common connection, which may be a ground connection. The magnitude and layout of the capacitors are selected to minimize current conducted by the capacitors. The capacitors may be surface mount technology located proximate to the switching devices or the capacitors may be incorporated in the circuit board on which the switching devices are mounted. The filter may be applied to any of the switching elements in a motor drive, such as the inverter section, an active rectifier section, or a switched mode power supply.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Inventors: Zoran Vrankovic, Graig Winterhalter, Gary Skibinski
  • Publication number: 20120086458
    Abstract: A method is provided for detection of a ground fault in a high resistance network in a voltage source power conversion circuit comprising a power converter that converts incoming AC power to DC power applied to a DC bus and an inverter that converts DC power from the DC bus to output AC power. The method includes detecting a midpoint-to-ground voltage between a low side of the DC bus and a ground potential and detecting the presence of a ground fault in a high resistance network based upon the detected midpoint-to-ground voltage.
    Type: Application
    Filed: October 9, 2010
    Publication date: April 12, 2012
    Applicant: Rockwell Automation Technologies, Inc.
    Inventors: Lixiang Wei, Zhijun Liu, Brian Patrick Brown, David W. Kirschnik, Russ J. Kerkman, Richard A. Lukaszewski, Gary Skibinski, Carlos Daniel Rodriguez-Valdez
  • Publication number: 20070030707
    Abstract: The present invention is directed to an auxiliary circuit for reducing low order current harmonics in a three-phase drive system driving a single-phase load, the three-phase drive system including a three-phase source voltage connected to a rectifier system connected to a DC link choke inductor connected to a three-phase current source inverter system.
    Type: Application
    Filed: August 1, 2006
    Publication date: February 8, 2007
    Inventors: Lixiang Wei, Gary Skibinski, Richard Lukaszewski
  • Publication number: 20070030708
    Abstract: The present invention is directed to a compensator-filter circuit for reducing low order current harmonics in a three-phase drive system driving a single-phase load, the three-phase drive system including a three-phase source voltage connected to a rectifier system connected to a DC link capacitor connected to a three-phase voltage source inverter.
    Type: Application
    Filed: August 1, 2006
    Publication date: February 8, 2007
    Inventors: Lixiang Wei, Gary Skibinski, Richard Lukaszewski
  • Publication number: 20070030706
    Abstract: A compensator circuit for reducing low order current harmonics in a three-phase drive system driving a single-phase load, the three-phase drive system including a three-phase source voltage connected to a rectifier system connected to a DC link capacitor connected to a three-phase voltage source inverter that supplies three-phase power.
    Type: Application
    Filed: August 1, 2006
    Publication date: February 8, 2007
    Inventors: Lixiang Wei, Gary Skibinski, Richard Lukaszewski
  • Publication number: 20060227582
    Abstract: A rectifier includes a transformer, a rectifying bridge, a link capacitor, and at least a first resonance loop. The transformer is operable to receive three phase input signals having a source frequency and generate a plurality of transformer phase signals. The rectifying bridge has a number of stages corresponding to the number of transformer phase signals and is operable to generate a rectified output signal based on the transformer phase signals. The link capacitor is coupled across the rectifying bridge. The first resonance loop is coupled between the rectifying bridge and the link capacitor. The first resonance loop has a first resonance frequency corresponding to a harmonic frequency of the source frequency.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 12, 2006
    Inventors: Lixiang Wei, Gary Skibinski, Richard Lukaszewski
  • Publication number: 20050068147
    Abstract: A modular inductor arrangement is provided in which a footprint of an enclosure for single or multiple phase inductors provides enhanced thermal transfer. The inductor coil may be wound about an axis generally parallel to a mounting surface of the package, so as to provide for reduced height and expanded footprint dimensions. The inductor package may be mounted on a thermal support, such as a fluid-cooled support. Heat is extracted from the assembly during operation, so as to establish a reduced maximum internal temperature as compared to here for known structures. The arrangement may be included in various circuit configurations, such as power converters. Other components may be incorporated and integrated into the package, including sensors, capacitor coils, other inductor coils, and so forth.
    Type: Application
    Filed: September 30, 2003
    Publication date: March 31, 2005
    Inventor: Gary Skibinski
  • Publication number: 20050068141
    Abstract: The present invention provides an improved inductor design which bounces thermal requirements with magnetic and other requirements. The package is designed based upon the desired magnetic volume and the dimensions of a primary heat dissipation surface, which is preferably designed for conductive heat transfer during operation. The other dimensions, such as the height of the package, result from these two parameters. Optimized package designs may thus be obtained which provide the desired operating temperatures, while better utilizing the magnetic volume. Package designs may include new aspect ratios, such as ratios providing a base area greater than a lateral side area. Aspect ratios between base dimensions, such as a diameter in cylindrical package and the resulting height may also be characteristic of the inductors resulting from the novel design approach.
    Type: Application
    Filed: September 30, 2003
    Publication date: March 31, 2005
    Inventor: Gary Skibinski
  • Patent number: 5831410
    Abstract: A termination network to be used with an induction motor for eliminating voltage reflections and voltage surges due to voltage reflections, the network includes a resistive element in series with a capacitive element between each two voltage supply lines. The capacitive element initially operates like a short so that a resistive element terminates each line for a short period, the termination network impedance matches the line impedance, and reflection is eliminated. After a voltage pulse passes to a stator winding the capacitor element is charged and the resistive element is effectively removed from the line circuit.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: November 3, 1998
    Assignee: Allen Bradley Company, Inc.
    Inventor: Gary Skibinski
  • Patent number: 5705971
    Abstract: A transformer including a core; a concentric inner primary tube passing through the core and running up and over at least a portion of the core, the concentric inner primary tube defining a longitudinal axis within the core; and a concentric outer secondary tube passing through the core and running up and over the concentric inner primary tube, the concentric outer secondary tube defining a longitudinal axis within the core and being spaced apart from the concentric inner primary tube, the longitudinal axis of the concentric inner primary tube and the longitudinal axis of the concentric outer secondary tube being aligned with one another so as to be coaxial. The concentric outer secondary tube substantially encloses the concentric inner primary tube so as to provide a low impedance shield.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: January 6, 1998
    Assignee: Allen-Bradley Company, Inc.
    Inventor: Gary Skibinski
  • Patent number: 5483142
    Abstract: A capacitor precharge circuit limits both peak DC link current and peak AC line current to any desired peak magnitude thereby providing for optimum precharge control and robust operation. The precharge circuit employs a microprocessor which implements a non-linear discontinuous current control scheme without the need for current sensors. The precharge circuit is well suited for use with an AC to DC converter having link inductor and a DC bus capacitor which requires precharging before full power is applied to the converter.
    Type: Grant
    Filed: September 22, 1993
    Date of Patent: January 9, 1996
    Assignee: Allen-Bradley Company, Inc.
    Inventors: Gary Skibinski, Thomas Gilmore
  • Patent number: 5341281
    Abstract: A harmonic compensator comprises a transformer having low leakage reactance connected between a utility and a load and a signal generator which injects into the transformer a signal having a frequency which cancels undesirable higher order harmonics induced by the load. The low leakage reactance nature of the transformer permits injection of high frequency signals which restore the fundamental sine wave of the signal from the utility and thereby eliminates undesirable nonlinear harmonics which cause up-line disruptions. The low leakage reactance transformers may comprise a coaxial structure having a thin hollow tube as the primary coil, a coaxial structure having a single main coaxial cable distributed into several paralleled coaxial cables of smaller diameter, or a co-planar transformer structure having flat strip line conductors wrapped around a conventional core as the primary and secondary coils.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: August 23, 1994
    Assignee: Allen-Bradley Company, Inc.
    Inventor: Gary Skibinski