Patents by Inventor Martin Samuel Butcher

Martin Samuel Butcher 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: 10992129
    Abstract: A power distribution system includes power converter systems electrically connected to a distribution bus which defines a point of common coupling. Each power converter system includes a power converter with semiconductor switching devices controlled using a pulse width modulation strategy with a switching frequency. A controller for each power converter system applies a spectrum analysis process to the respective power converter system that uses measured or derived zero sequence currents associated with the respective power converter system to determine the location of a ground fault within the power distribution system. Each controller applies a switching frequency process where the switching frequency of the power converter of at least one of the power converter systems is different from the switching frequency of the power converter of at least another one of the power converter systems during at least part of the time that the spectrum analysis process is applied.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: April 27, 2021
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD.
    Inventors: Lihua Hu, Teng Long, Martin Samuel Butcher, Allan David Crane
  • Publication number: 20190140527
    Abstract: The invention relates to a power system that includes an electrical machine, (e.g., a motor or generator). The electrical machine has a stator with a stator winding connected to a power converter. The power system includes an assembly to reduce, and optionally eliminate, common mode currents between the electrical machine and the power converter. The assembly includes a stator frame connected to ground potential and an electrical insulator (e.g., a plurality of stator mounts) located between the stator frame and the stator.
    Type: Application
    Filed: November 8, 2018
    Publication date: May 9, 2019
    Inventors: Benjamin Guy Salter, Martin Samuel Butcher
  • Publication number: 20180241200
    Abstract: A power distribution system includes power converter systems electrically connected to a distribution bus which defines a point of common coupling. Each power converter system includes a power converter with semiconductor switching devices controlled using a pulse width modulation strategy with a switching frequency. A controller for each power converter system applies a spectrum analysis process to the respective power converter system that uses measured or derived zero sequence currents associated with the respective power converter system to determine the location of a ground fault within the power distribution system. Each controller applies a switching frequency process where the switching frequency of the power converter of at least one of the power converter systems is different from the switching frequency of the power converter of at least another one of the power converter systems during at least part of the time that the spectrum analysis process is applied.
    Type: Application
    Filed: August 22, 2016
    Publication date: August 23, 2018
    Inventors: Lihua HU, Teng LONG, Martin Samuel BUTCHER, Allan David CRANE
  • Patent number: 10008856
    Abstract: A power system for offshore application includes a plurality of power circuits. Each of the power circuit includes an alternating current (AC) bus which supplies power to an auxiliary load and is connected to a generator. The power circuit further includes a first direct current (DC) bus having a first DC voltage supplying power to a first load and a second DC bus having a second DC voltage supplying power to a second load. The power circuit also includes a first DC to DC converter coupled between the first DC bus and the second DC bus, wherein the first DC to DC converter is configured for bidirectional power flow and an AC to DC converter coupled between the AC bus and the first DC bus. The first DC bus of at least one power circuit is coupled to the second DC bus of at least another power circuit with a second DC to DC converter.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: June 26, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Yan Pan, Martin Samuel Butcher, Dong Dong, Martin Richard Ingles, Christof Martin Sihler, Ara Panosyan
  • Patent number: 9825523
    Abstract: A converter control arrangement (18) for regulating the output current of a dc source power converter (16) comprises a current regulator (20) for regulating the output current based on a comparison of an output current value (Iout) of the dc source power converter (16) with a desired target current value (Itgt). When the output voltage value (Vout) of the dc source power converter (16) is within a normal operating voltage range between minimum and maximum voltage values (Vmin, Vmax) defined with respect to a voltage reference value (Vref) of the dc source power converter (16), the converter control arrangement (18) controls the target current value (Itgt) so that it is equal to a desired reference current value (Iref).
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: November 21, 2017
    Assignee: GE Energy Power Conversion Technology LTD
    Inventors: Lihua Hu, Richard Ian Stephens, Martin Samuel Butcher
  • Publication number: 20170133858
    Abstract: A power system for offshore application includes a plurality of power circuits. Each of the power circuit includes an alternating current (AC) bus which supplies power to an auxiliary load and is connected to a generator. The power circuit further includes a first direct current (DC) bus having a first DC voltage supplying power to a first load and a second DC bus having a second DC voltage supplying power to a second load. The power circuit also includes a first DC to DC converter coupled between the first DC bus and the second DC bus, wherein the first DC to DC converter is configured for bidirectional power flow and an AC to DC converter coupled between the AC bus and the first DC bus. The first DC bus of at least one power circuit is coupled to the second DC bus of at least another power circuit with a second DC to DC converter.
    Type: Application
    Filed: November 9, 2015
    Publication date: May 11, 2017
    Inventors: Yan Pan, Martin Samuel Butcher, Dong Dong, Martin Richard Ingles, Christof Martin Sihler, Ara Panosyan
  • Patent number: 9048039
    Abstract: The present invention relates to a vacuum switch assembly for interrupting and isolating fault current. The vacuum switch assembly includes first and second dc lines that, in use, are electrically connected to the dc output terminals of a primary dc power source and a dc network. Each dc line includes at least one vacuum switch having contacts that are opened and closed under the control of a vacuum switch controller. A passive dc power supply unit is electrically connected to the first and second dc lines and includes a secondary dc power source that provides a substantially ripple-free sensing voltage. The vacuum switch controller is adapted to open the vacuum switch contacts when a fault condition (e.g. a fault current or other fault) or an operator request has been identified and when the current flowing between the vacuum switch contacts is below a chopping current associated with the vacuum switches.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: June 2, 2015
    Assignee: GE Energy Power Conversion Technology Limited
    Inventors: Allan David Crane, Martin Samuel Butcher
  • Publication number: 20140347899
    Abstract: A method of operating a power converter arrangement, the power converter arrangement includes a dc link and a dc load/source, an active rectifier/inverter having dc terminals connected to the dc link and is adapted to provide a variable dc link voltage between a maximum and a minimum limits, an interleaved buck converter having a plurality of converter circuits connected between the dc link and the dc load/source, wherein each converter circuit includes a first switch, a second switch, and a reactor, the method including determining one or more null values of dc link voltage with reference to the voltage across the dc load/source, and if a null value of dc link voltage is between the maximum and the minimum limits, controlling the active rectifier/inverter to provide a dc link voltage that is substantially the same as the null value of dc link voltage.
    Type: Application
    Filed: May 21, 2014
    Publication date: November 27, 2014
    Applicant: GE Energy Power Conversion Technology Ltd
    Inventors: Dominic David BANHAMHALL, Martin Samuel BUTCHER
  • Publication number: 20130334889
    Abstract: A converter control arrangement (18) for regulating the output current of a dc source power converter (16) comprises a current regulator (20) for regulating the output current based on a comparison of an output current value (Iout) of the dc source power converter (16) with a desired target current value (Itgt). When the output voltage value (Vout) of the dc source power converter (16) is within a normal operating voltage range between minimum and maximum voltage values (Vmin, Vmax) defined with respect to a voltage reference value (Vref) of the dc source power converter (16), the converter control arrangement (18) controls the target current value (Itgt) so that it is equal to a desired reference current value (Iref).
    Type: Application
    Filed: February 29, 2012
    Publication date: December 19, 2013
    Applicant: GE Energy Power Conversion Technology Ltd.
    Inventors: Lihua Hu, Richard Ian Stephens, Martin Samuel Butcher
  • Publication number: 20130301180
    Abstract: The present invention relates to a vacuum switch assembly for interrupting and isolating fault current. The vacuum switch assembly includes first and second dc lines that, in use, are electrically connected to the dc output terminals of a primary dc power source and a dc network. Each dc line includes at least one vacuum switch having contacts that are opened and closed under the control of a vacuum switch controller. A passive dc power supply unit is electrically connected to the first and second dc lines and includes a secondary dc power source that provides a substantially ripple-free sensing voltage. The vacuum switch controller is adapted to open the vacuum switch contacts when a fault condition (e.g. a fault current or other fault) or an operator request has been identified and when the current flowing between the vacuum switch contacts is below a chopping current associated with the vacuum switches.
    Type: Application
    Filed: May 8, 2012
    Publication date: November 14, 2013
    Applicant: CONVERTEAM TECHNOLOGY LTD.
    Inventors: Allan David Crane, Martin Samuel Butcher