公开(公告)号：US10038460B2

公开(公告)日：2018-07-31

申请号：US15341242

申请日：2016-11-02

Applicant: INTEL CORPORATION ,  VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： Seong-Youp Suh ,  W. Dawson Kesling ,  Majid Manteghi ,  Mohsen Salehi ,  Harry Skinner

IPC: H04B1/40 ,  H04B1/04 ,  H04B1/18 ,  H01Q5/335 ,  H01Q9/14 ,  H01Q1/24 ,  H01Q1/38

CPC classification number: H04B1/0458 ,  H01Q1/243 ,  H01Q1/38 ,  H01Q5/335 ,  H01Q9/145 ,  H04B1/04 ,  H04B1/18

Abstract: Embodiments of the present disclosure describe methods, apparatuses, and systems related to a wireless communication device using time-variant antenna. Other embodiments may be described and/or claimed.

公开(公告)号：US20180205306A1

公开(公告)日：2018-07-19

申请号：US15868486

申请日：2018-01-11

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Zhengrong Huang ,  Zhengyang Liu ,  Fred C. Lee ,  Qiang Li ,  Furong Xiao

IPC: H02M1/08 ,  H02M7/797 ,  H02M1/12

CPC classification number: H02M1/083 ,  H02M1/126 ,  H02M7/219 ,  H02M7/797 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: Critical-mode soft-switching techniques for a power converter are described. In one example, a power converter includes a converter electrically coupled between an alternating current (AC) power system and a direct current (DC) power system, where the converter includes a number of phase legs. The power converter can also include a control system configured, during a portion of a whole line cycle of the AC power system, to clamp a first phase leg of the converter from switching and operate second and third phase legs of the converter independently in either critical conduction mode (CRM) or in discontinuous conduction mode (DCM).

公开(公告)号：US09966874B2

公开(公告)日：2018-05-08

申请号：US14578651

申请日：2014-12-22

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Jun Wang ,  Rolando Burgos ,  Dushan Boroyevich ,  Bo Wen

IPC: H02M7/483 ,  H02M1/00

CPC classification number: H02M7/483 ,  H02M2001/0003 ,  H02M2007/4835

Abstract: In a modular multi-level power converter, additional switching states are interleaved between main switching states that control output voltage or waveform. The additional switching states provide current from a DC-link to charge capacitors in respective modules or cells to an offset voltage from which the capacitor voltages are controlled toward a reference voltage during each switching cycle rather than being allowed to build up over a period of an output waveform of variable line frequency, possibly including zero frequency. Since the switching cycle is much shorter than the duration of a line frequency cycle and the capacitor voltages are balanced during each switching cycle, output voltage ripple can be limited as desired with a capacitor of much smaller value and size than would otherwise be required.

公开(公告)号：US09923560B2

公开(公告)日：2018-03-20

申请号：US15097853

申请日：2016-04-13

Applicant: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC. ,  VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： Chi-Ming Wang ,  Yincan Mao ,  Zichen Miao ,  Khai Ngo

IPC: G05F3/02 ,  H03K17/687

CPC classification number: H03K17/6871 ,  G05F3/02 ,  H03K17/0822

Abstract: Aspects of the disclosure provide a system having a power circuit. The power circuit includes a first switch circuit having at least a first transistor and a second switch circuit having at least a second transistor. Further, the power circuit includes first interconnections configured to couple the first switch circuit to driving nodes, a source node and a drain node of the power circuit, and second interconnection configured to couple the second switch circuit in parallel to the first switch circuit to the driving nodes, the source node and the drain node of the power circuit. A polarity of unbalance in the first interconnections and the second interconnections dominates a polarity of current unbalance in the first switch circuit and the second switch circuit.

公开(公告)号：US20180076723A1

公开(公告)日：2018-03-15

申请号：US15693930

申请日：2017-09-01

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Bin Li ,  Zhengyang Liu ,  Fred C. Lee ,  Qiang Li

IPC: H02M3/335 ,  H02M1/088 ,  H02M1/42 ,  H02J7/04 ,  H02J7/00 ,  H02M1/14 ,  H01F27/24 ,  H01F27/28 ,  H01F27/34

CPC classification number: H02M3/33569 ,  H01F27/24 ,  H01F27/28 ,  H01F27/346 ,  H01F2027/2819 ,  H02J7/0063 ,  H02J7/022 ,  H02J7/04 ,  H02J2007/0067 ,  H02M1/088 ,  H02M1/14 ,  H02M1/4208 ,  H02M3/3378 ,  H02M2001/0048 ,  H02M2001/007 ,  Y02B40/90 ,  Y02B70/126 ,  Y02B70/1491

Abstract: A variable direct current (DC) link power converter is described. In one example, the power converter includes a first converter stage configured to convert power from a power source to power at an intermediate link voltage and a second converter stage configured to convert the power at the intermediate link voltage to power for charging a battery. The power converter further includes a control system having an intermediate link voltage regulation control loop configured, in a first mode of operation, to regulate the intermediate link voltage through the first converter stage based on a voltage of the battery, and a ripple regulation control loop configured to sense a charging current for the battery and regulate a gain of the second converter stage based on the charging current to reduce ripple in the charging current. A new configuration of transformer suitable for use with the power converter is also described.

公开(公告)号：US09914362B2

公开(公告)日：2018-03-13

申请号：US14139059

申请日：2013-12-23

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Khai Doan The Ngo ,  Hui Wang

IPC: H02J7/00 ,  G05F1/70 ,  H02P23/00 ,  H02P25/00 ,  H02P27/00 ,  B60L11/18 ,  H02M1/14 ,  H02M1/42 ,  H02M7/5387

CPC classification number: B60L11/1803 ,  B60L11/1812 ,  B60L2210/14 ,  B60L2220/54 ,  B60L2240/526 ,  B60L2240/527 ,  B60L2240/529 ,  H02M1/14 ,  H02M1/4225 ,  H02M7/5387 ,  Y02T10/641 ,  Y02T10/7005 ,  Y02T10/7072 ,  Y02T10/7225 ,  Y02T90/127 ,  Y02T90/14

Abstract: Switches of a switching circuit used to control operation of an electric motor such as in an electrically powered vehicle connect respective windings of the electric motor as a single phase inductor during battery charging. The inductor can then store inherent low frequency, second order ripple power and return that power to a load presented by a battery during battery charging to deliver substantially constant current. Storage of ripple power in the inductor allows the capacitance value, size, weight and cost of a filter capacitor of a power factor correction circuit providing input power to a battery charger to be reduced by an order of magnitude or more. Direction of current flow through the inductor is periodically reversed to avoid magnetizing the motor.

公开(公告)号：US09897605B2

公开(公告)日：2018-02-20

申请号：US14946384

申请日：2015-11-19

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Xiang-Jin Meng ,  Yaowei Huang

IPC: G01N33/569 ,  C07K16/08 ,  C12Q1/70 ,  A61K39/12 ,  C07K14/005 ,  C12N7/00 ,  A61K39/00

CPC classification number: G01N33/56983 ,  A61K39/12 ,  A61K2039/552 ,  C07K14/005 ,  C07K16/081 ,  C12N7/00 ,  C12N2750/00021 ,  C12N2750/00022 ,  C12N2750/00034 ,  C12N2750/14034 ,  C12Q1/701 ,  G01N2333/01 ,  G01N2333/085 ,  G01N2469/20

Abstract: The present invention provides four purified preparation containing a polynucleic acid molecule encoding porcine Torque teno virus (PTTV) genotypes or subtypes PTTV1a-VA, PTTV1b-VA, PTTV2b-VA, and PTTV2c-VA. The present invention also provides infectious DNA clones, biologically functional plasmid or viral vector containing the infectious nucleic acid genome molecule of the same. The present invention further provides live, attenuated, vector-expressed and purified recombinant capsid subunit or killed viral vaccines for protection against PTTV infection. The present invention additionally provides subunit vaccines comprising PTTV specific gene products, especially ORF1 capsid gene product for protection against PTTV infection. Further, the present invention provides methods for diagnosing PTTV infection via polymerase chain reaction (PCR) using specific primer for PTTV1, PTTV2, and individual PTTV1 genotypes. Finally, the present invention provides methods for diagnosing PTTV infection via immunological methods, e.g., enzyme-linked immunoabsorbent assay (ELISA) and Western blot using PTTV specific antigens for detecting serum PTTV specific antibodies.

公开(公告)号：US20180006644A1

公开(公告)日：2018-01-04

申请号：US15201002

申请日：2016-07-01

Applicant: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC. ,  VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： Yincan MAO ,  Chi-Ming WANG ,  Zichen MIAO ,  Khai NGO

IPC: H03K17/687

CPC classification number: H03K17/6871 ,  H03K17/0822 ,  H03K17/122

Abstract: A power circuit includes a power source for providing electrical power and two driving transistors being disposed in parallel and receiving electrical power from the power source. Each of the two driving transistors includes a gate terminal, a source connection, and a kelvin source connection. The power circuit also includes a control voltage source having a first terminal and a second terminal. The control voltage source provides a control signal to the two driving transistors for determining driving currents through the two driving transistors. The first terminal is connected to the gate terminals of the two driving transistors, and the second terminal is connected to the kelvin source connections of the two driving transistors. The kelvin source connections of the two driving transistors are inductively coupled.

公开(公告)号：US20170360326A1

公开(公告)日：2017-12-21

申请号：US15536333

申请日：2015-12-15

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： RAFAEL V. DAVALOS ,  MOHAMMAD BONAKDAR ,  EDUARDO L. LATOUCHE ,  ROOP L. MAHAJAN ,  JOHN L. ROBERTSON ,  CHRISTOPHER B. ARENA ,  MICHAEL B. SANO

IPC: A61B5/053 ,  G01N33/543 ,  A61B5/01

Abstract: Provided herein are devices, systems, and methods for monitoring lesion or treated area in a tissue during focal ablation or cell membrane disruption therapy. Provided herein are embodiments of an electrical conductivity sensor having an impedance sensor, where the impedance sensor can be configured to measure a low-frequency and a high-frequency impedance and a substrate, where the impedance sensor is coupled to the substrate. The substrate can be flexible. In embodiments, the impedance sensor can contain two or more electrical conductors. The electrical conductors can be in a bipolar configuration. The electrical conductors can be in a tetrapolar configuration. In embodiments, the electrical conductivity sensor can have two impedance sensors that can be coupled to the substrate such that they are orthogonal to each other.

公开(公告)号：US20170197175A1

公开(公告)日：2017-07-13

申请号：US15316732

申请日：2015-06-05

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Stuart J. Higgins ,  Yih-An Liu ,  Yueying Yu

IPC: B01D53/14

Abstract: An energy-efficient method of removing carbon dioxide, hydrogen sulfide, and other acid gases from a stream of flue gases. The flue stream is contacted with a predetermined sorbent system to remove acid gases from the flue stream. The acid gas-rich sorbent is then heated to desorb the acid gas for capture and regenerate the sorbent. Heat exchangers and heat pumps are used to reduce utility steam and/or cooling water consumption.