Abstract: An adjustable surgical frame for supporting a patient to facilitate different surgical approaches to the spine of the patient includes a first end, an opposite second end, and a length extending between the first and second ends thereof. The surgical frame has a longitudinal axis extending between the first and second ends along the length thereof, and includes a first support surface, a second support surface, and a third support surface. The surgical frame also includes an adjustable chest support, an adjustable hip and upper leg support, and an adjustable feet and lower leg support. The surgical frame is moveable between a first position, a second position, and a third position, and the chest support, the hip and upper leg support, and the feet and lower leg support are moveable to accommodate differently sized patients on the surgical frame.

Abstract: A surgical draping system includes an under-draping, an over-draping, and a connecting draping connected by the under-draping and the over-draping. The surgical draping system is used to establish and maintain a surgical corridor to a surgical site or sites on a patient supported by a surgical table. The surgical draping system can accommodate rotation of the patient on the surgical table, such that the sterile surgical corridor is maintained even during such rotation. The sterile surgical corridor extends through an aperture formed in the over-draping, through an enclosed passageway formed through the connecting draping, and through an aperture formed in the under-draping.

Abstract: A technique facilitates precision fluid conveyance and placement to one or more desired locations in a borehole, e.g. a wellbore. According to an embodiment, a material container, e.g. a fluid container, and/or a fluid flow path system may be deployed downhole via coiled tubing. A release system is selectively actuatable to release a specific amount or amounts of material, e.g. treatment fluid, at the one or more desired locations along the borehole. Depending on the application, various discharge mechanisms and/or supply mechanisms may be used in cooperation with the material container and/or fluid flow path system to provide the precision fluid conveyance and placement.

Abstract: A turbocharger includes: a mixed flow turbine including a turbine wheel; a turbine housing configured to house the turbine wheel, including a gas passage extending toward a leading edge of a blade of the turbine wheel; and nozzle vanes arranged in the gas passage in the circumferential direction of the turbine wheel, mutually adjacent two of the nozzle vanes forming a throat therebetween. Each nozzle vane is twisted with respect to a trailing edge of the nozzle vane as a twist center such that a width of the throat becomes narrower on the shroud side than on the hub side.

Abstract: Systems and methods presented herein facilitate operation of well-related tools. In certain embodiments, a variety of data (e.g., downhole data and/or surface data) may be collected to enable optimization of operations related to the well-related tools. In certain embodiments, the collected data may be provided as advisory data (e.g., presented to human operators of the well to inform control actions performed by the human operators) and/or used to facilitate automation of downhole processes and/or surface processes (e.g., which may be automatically performed by a computer implemented surface processing system (e.g., a well control system), without intervention from human operators). In certain embodiments, the systems and methods described herein may enhance downhole operations (e.g., milling operations) by improving the efficiency and utilization of data to enable performance optimization and improved resource controls of the downhole operations.

Abstract: A technique facilitates precision fluid conveyance and placement to one or more desired locations in a borehole, e.g. a wellbore. According to an embodiment, a material container, e.g. a fluid container, and/or a fluid flow path system may be deployed downhole via coiled tubing. A release system is selectively actuatable to release a specific amount or amounts of material, e.g. treatment fluid, at the one or more desired locations along the borehole. Depending on the application, various discharge mechanisms and/or supply mechanisms may be used in cooperation with the material container and/or fluid flow path system to provide the precision fluid conveyance and placement.

Abstract: This disclosure describes systems, methods, and apparatus for controlling a voltage provided to a plurality of configurable output modules using a resonant converter, the resonant converter comprising: an inverter circuit; a resonant capacitor bridge coupled across the inverter circuit; N groups of output modules, each of the N groups comprising terminals configured for coupling to up to M output modules, the output modules each comprising: a transformer having a primary and a secondary; and a rectified output coupled to the secondary and configured for coupling to a load; and a resonant inductor network configured to be coupled between the resonant capacitor bridge and the primaries of the transformers, the resonant inductor network comprising: at least one parallel inductor; and N parallel branches arranged in parallel and each branch comprising a series inductor, each of the series inductors configured for transformer-coupling to up to M output modules.

Abstract: A power converter includes a transformer, a switching bridge circuit, a resonant tank circuit, an output rectifier, and a controller. The switching bridge circuit includes a plurality of switches, each switch controllable into a conduction mode and into a non-conduction mode. The controller is configured to control the plurality of switches based on a series of phase shift modulation switching cycles, each cycle comprising a control period and a delay period. During the control period, the controller causes the conduction mode of each switch of the plurality of switches to overlap a portion of each conduction mode of two other switches. During the delay period, the controller controls all of the switches into non-conduction modes overlapping in time.

Abstract: The invention provides a control circuit for controlling the operation of a power converter having a switch connected to an output of the power converter, said control circuit comprising a first amplifier for sensing an output voltage of the power converter and a second amplifier configured to derive a frequency compensated error signal output, to provide a frequency control compensation loop to an input of the power converter and the output of the second amplifier is connected to the switch of the power converter.

Abstract: A power converter a transformer, a switching bridge circuit, a resonant tank circuit, an output rectifier, and a controller. The switching bridge circuit a plurality of switches, each switch controllable into a conduction mode and into a non-conduction mode. The controller is configured to control the plurality of switches based on a series of phase shift modulation switching cycles, each cycle comprising a control period and a delay period. During the control period, the controller causes the conduction mode of each switch of the plurality of switches to overlap a portion of each conduction mode of two other switches. During the delay period, the controller controls all of the switches into non-conduction modes overlapping in time.

Abstract: Systems and methods presented herein facilitate operation of well-related tools. In certain embodiments, a variety of data (e.g., downhole data and/or surface data) may be collected to enable optimization of operations related to the well-related tools. In certain embodiments, the collected data may be provided as advisory data (e.g., presented to human operators of the well to inform control actions performed by the human operators) and/or used to facilitate automation of downhole processes and/or surface processes (e.g., which may be automatically performed by a computer implemented surface processing system (e.g., a well control system), without intervention from human operators). In certain embodiments, the systems and methods described herein may enhance downhole operations (e.g., milling operations) by improving the efficiency and utilization of data to enable performance optimization and improved resource controls of the downhole operations.

Abstract: This disclosure provides a resonant LLC power converter unit to provide a plurality of power outputs. The power converter unit includes multiple transformers arranged such that at least one primary winding of each transformer is connected in parallel and configured to provide a power output to a secondary that powers one of the plurality of outputs. One of these transformers, or a parallel choke across an output bus, can be used to provide lower power to the output bus during a standby state (i.e., during a light- or no-load condition). The power converter unit includes a first switching section for providing a first power input during normal operation and a second switching section for providing a second power input during no- or light-load conditions.

Abstract: This disclosure describes systems, methods, and apparatus for driving a plurality of output circuits from a DC input signal using a resonant converter, the resonant converter comprising a switch network, a resonant tank, and a rectifier network, the resonant tank comprising: a resonant capacitor bridge coupled across the switch network; a plurality of branches, each branch comprising at least one series inductor coupled at a first end to the resonant capacitor bridge and at a second end to the rectifier network; and at least one parallel inductor; the rectifier network comprising one or more groups of transformers, each group coupled to one branch of the plurality of branches, and wherein the primary windings of the transformers of each group are coupled in parallel, and wherein the secondary windings are configured for coupling to an output load.

Abstract: This disclosure describes systems, methods, and apparatus for controlling a voltage provided to a plurality of configurable output modules using a resonant converter, the resonant converter comprising: an inverter circuit; a resonant capacitor bridge coupled across the inverter circuit; N groups of output modules, each of the N groups comprising terminals configured for coupling to up to M output modules, the output modules each comprising: a transformer having a primary and a secondary; and a rectified output coupled to the secondary and configured for coupling to a load; and a resonant inductor network configured to be coupled between the resonant capacitor bridge and the primaries of the transformers, the resonant inductor network comprising: at least one parallel inductor; and N parallel branches arranged in parallel and each branch comprising a series inductor, each of the series inductors configured for transformer-coupling to up to M output modules.

Abstract: This disclosure describes systems, methods, and apparatus for driving a plurality of output circuits from a DC input signal using a resonant converter, the resonant converter comprising a switch network, a resonant tank, and a rectifier network, the resonant tank comprising: a resonant capacitor bridge coupled across the switch network; a plurality of branches, each branch comprising at least one series inductor coupled at a first end to the resonant capacitor bridge and at a second end to the rectifier network; and at least one parallel inductor; the rectifier network comprising one or more groups of transformers, each group coupled to one branch of the plurality of branches, and wherein the primary windings of the transformers of each group are coupled in parallel, and wherein the secondary windings are configured for coupling to an output load.

Abstract: This disclosure provides a resonant LLC power converter unit to provide a plurality of power outputs. The power converter unit includes multiple transformers arranged such that at least one primary winding of each transformer is connected in parallel and configured to provide a power output to a secondary that powers one of the plurality of outputs. One of these transformers, or a parallel choke across an output bus, can be used to provide lower power to the output bus during a standby state (i.e., during a light- or no-load condition). The power converter unit includes a first switching section for providing a first power input during normal operation and a second switching section for providing a second power input during no- or light-load conditions.

Abstract: Systems and methods presented herein facilitate operation of well-related tools. In certain embodiments, a variety of data (e.g., downhole data and/or surface data) may be collected to enable optimization of operations related to the well-related tools. In certain embodiments, the collected data may be provided as advisory data (e.g., presented to human operators of the well to inform control actions performed by the human operators) and/or used to facilitate automation of downhole processes and/or surface processes (e.g., which may be automatically performed by a computer implemented surface processing system (e.g., a well control system), without intervention from human operators). In certain embodiments, the systems and methods described herein may enhance downhole operations (e.g., milling operations) by improving the efficiency and utilization of data to enable performance optimization and improved resource controls of the downhole operations.

Abstract: A turbocharger includes: a mixed flow turbine including a turbine wheel; a turbine housing configured to house the turbine wheel, including a gas passage extending toward a leading edge of a blade of the turbine wheel; and nozzle vanes arranged in the gas passage in the circumferential direction of the turbine wheel, mutually adjacent two of the nozzle vanes forming a throat therebetween. Each nozzle vane is twisted with respect to a trailing edge of the nozzle vane as a twist center such that a width of the throat becomes narrower on the shroud side than on the hub side.

Abstract: The invention provides a control circuit for controlling the operation of a power converter having a switch connected to an output of the power converter, said control circuit comprising a first amplifier for sensing an output voltage of the power converter and a second amplifier configured to derive a frequency compensated error signal output, to provide a frequency control compensation loop to an input of the power converter and the output of the second amplifier is connected to the switch of the power converter.

Abstract: The invention provides a control circuit for controlling the operation of a power converter having a switch connected to an output of the power converter, said control circuit comprising a first amplifier for sensing an output voltage of the power converter and a second amplifier configured to derive a frequency compensated error signal output, to provide a frequency control compensation loop to an input of the power converter and the output of the second amplifier is connected to the switch of the power converter.