Abstract: An inverter with a modular bus assembly is described. In various embodiments, the modular bus assembly includes a laminated motherboard and a plurality of capacitor daughtercards. The laminated motherboard can be configured to interface a plurality of phase-leg modules and a plurality of capacitor daughtercards through a plurality of terminals and connectors located on a bottom side or a top side of the laminated motherboard. The laminated motherboard includes a layer stack with a plurality of conductor layers. Each of the plurality of conductor layers is implemented with a net spacing from a neighboring plated through hole (PTH) based at least in part on differences in potential to be applied to each of the plurality of conductor layers as compared to a potential to be applied to the PTH. Embedded shield polygons can be implemented on the laminated motherboard to mitigate surface discharge at surface terminal (PTH/SMT) triple junctions.
Type:
Grant
Filed:
July 27, 2020
Date of Patent:
March 8, 2022
Assignee:
VIRGINA TECH INTELLECTUAL PROPERTIES, INC.
Abstract: A swimming pool cleaner includes a chassis that supports a motor and a camera that is associated with the chassis and configured to identify at least one object. A controller is in communication with the camera and is configured to control movement of the pool cleaner based on output from the camera.
Type:
Grant
Filed:
June 3, 2015
Date of Patent:
July 17, 2018
Assignees:
Pentair Water Pool and Spa, Inc., Virgina Tech Intellectual Properties, Inc.
Inventors:
Alexander Leonessa, Christopher H. Cain, Brian Boothe
Abstract: A plug-and-play antenna may be used with many different types of wireless communication devices. An antenna may be coupled to an impedance tuning component and a waveform generator. A calibration control module receives radio status information, controls the waveform generator to vary a response of the antenna, and tunes the impedance tuning component to match impedances between a radio and the antenna.
Type:
Grant
Filed:
August 12, 2016
Date of Patent:
April 17, 2018
Assignees:
INTEL CORPORATION, VIRGINA TECH INTELLECTUAL PROPERTIES, INC.
Inventors:
Seong-Youp Suh, Harry G. Skinner, W. Dawson Kesling, Majid Manteghi
Abstract: Components of an unmanned undersea vehicle are inspired by jellyfish that uses its flexible body and tilt sensing to achieve efficient swimming and turning. A tilt sensor, based on a statocyst, has a metal ball in a chamber lined with resistors. The tilt is sensed in accordance with which resistors the ball contacts. A composition of polyvinyl alcohol hydrogel with ferritin particles dispersed therein mimics the qualities of a jellyfish's mesoglea.
Type:
Grant
Filed:
December 31, 2012
Date of Patent:
September 29, 2015
Assignee:
Virgina Tech Intellectual Properties, Inc.
Abstract: A small signal feedback loop or feed-forward loop having gain provides substantially unconditional instability in a phase locked loop when a reference phase signal is lost. The small signal feedback or feed-forward also modifies phase locked loop bandwidth when the reference phase signal is lost to increase rapidity of response to loss of reference phase signal while maintaining insensitivity to reference voltage amplitude change while the reference phase signal is present. The performance thus achieved is particularly suitable for rapid condition detection response and control of a grid connected power converter under islanding conditions.
Type:
Grant
Filed:
June 5, 2013
Date of Patent:
February 17, 2015
Assignee:
Virgina Tech Intellectual Properties, Inc.
Inventors:
Dong Dong, Dushan Boroyevich, Paolo Mattavelli, Bo Wen
Abstract: A transgenic, non-human mammalian animal is capable of expressing a heterologous gene for human or other recombinant physiologically functional fibrinogen holoprotein or individual subunit chain polypeptides thereof or a modified or fusion fibrinogen in mammary glands of the animals and secreting the expressed product into a body fluid. Methodology employing such a mammal yields recombinant physiologically functional fibrinogens, subunit chain polypeptides thereof, and modified or fusion fibrinogens.
Type:
Grant
Filed:
January 24, 2005
Date of Patent:
October 14, 2008
Assignees:
Virgina Tech. Intellectual Properties, Inc., American National Red Cross, University of North Carolina at Chapel Hill
Inventors:
William H. Velander, William N. Drohan, Henryk Lubon, John L. Johnson
Abstract: A package for an optical fiber sensor having a metal jacket surrounding the sensor, and heat-shrink tubing surrounding the metal jacket. The metal jacket is made of a low melting point metal (e.g. lead, tin). The sensor can be disposed in a rigid tube (e.g. stainless steel or glass) that is surrounded by the metal jacket. The metal jacket provides a hermetic, or nearly hermetic seal for the sensor. The package is made by melting the metal jacket and heating the heat shrink tubing at the same time. As the heat-shrink tubing shrinks, it presses the low melting point metal against the sensor, and squeezes out the excess metal.
Type:
Grant
Filed:
October 21, 2003
Date of Patent:
August 9, 2005
Assignee:
Virgina Tech Intellectual Properties, Inc.