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    SYSTEMS AND METHODS FOR PROVIDING GRADIENT POWER FOR AN MRI SYSTEM
    1.
    发明申请
    SYSTEMS AND METHODS FOR PROVIDING GRADIENT POWER FOR AN MRI SYSTEM 审中-公开

    公开(公告)号：US20200158802A1

    公开(公告)日：2020-05-21

    申请号：US16749452

    申请日：2020-01-22

    Applicant: General Electric Company

    Inventor： Viswanathan Kanakasabai ,  Jayanti Ganesh ,  Juan Antonio Sabate

    IPC: G01R33/385 ,  H02M3/335 ,  H03F3/217 ,  H02M3/337

    Abstract: Power systems and circuitry for generation of gradient magnetic fields in magnetic resonance imaging (MRI) systems are discussed herein. Embodiments may include the use of multiple gradient amplifiers that share a high-frequency power distribution unit, that may perform power distribution and power supply roles. The high-frequency power distribution unit may allow the use of a single power supply to drive multiple gradient amplifiers via a shared power bus. The gradient amplifiers may make use of modern semiconductor materials that provide high-frequency, high voltage performance, and may be implemented using single semiconductor bridges.

    System for filtering high frequency noise components and an associated method thereof
    3.
    发明授权
    System for filtering high frequency noise components and an associated method thereof 有权

    公开(公告)号：US09882464B1

    公开(公告)日：2018-01-30

    申请号：US15375427

    申请日：2016-12-12

    Applicant: General Electric Company

    Inventor： Cong Li ,  Ruxi Wang ,  Juan Antonio Sabate

    IPC: H02M1/12 ,  H02M7/44

    CPC classification number: H02M1/126 ,  H02M7/44 ,  H02M2001/123

    Abstract: A system including at least one first converter and a filtering unit coupled to the at least one first converter is presented. The filtering unit includes at least one second converter and a plurality of inductors coupled to the at least one second converter. The system further includes a controlling unit operatively coupled to the at least one first converter and the at least one second converter. The controlling unit switches the at least one first converter to generate a first output voltage and the at least one second converter to generate a second output voltage, where the first output voltage and the second output voltage have a substantially same switching pattern.

    Magnetic resonance imaging switching power amplifier system and methods
    5.
    发明授权
    Magnetic resonance imaging switching power amplifier system and methods 有权

    公开(公告)号：US10585155B2

    公开(公告)日：2020-03-10

    申请号：US15634598

    申请日：2017-06-27

    Applicant: General Electric Company

    Inventor： Ruxi Wang ,  Xiaohu Liu ,  Han Peng ,  Fengfeng Tao ,  Juan Antonio Sabate

    IPC: G01R33/385 ,  G01R33/36 ,  G01R33/422

    Abstract: This disclosure regards a magnetic resonance imaging system including a scanner, and gradient drivers. The scanner is to be implemented within a scan room that is shielded from electromagnetic interference. Gradient coils are designed to create a linear gradient in the magnetic field generated in the scanner by a primary magnet. These coils are energized by gradient drivers. The gradient drivers use transformers and other electrical devices in a switching stage configured to generate pulse-width-modulated power. The transformers may have non-magnetic cores to facilitate implementing the gradient drivers within the scan room. The gradient drivers also use a filtering stage which uses inductors and other electrical devices to smooth the pulse-width-modulated power. The inductors within the filters may have non-magnetic cores to facilitate implementing the gradient driver within the scan room. Additionally, an inductor with a hollow wire may be used to circulate fluid to facilitate cooling the gradient driver.

    Cascaded electrical device bus structure systems and methods
    7.
    发明授权
    Cascaded electrical device bus structure systems and methods 有权

    公开(公告)号：US10185141B2

    公开(公告)日：2019-01-22

    申请号：US15632002

    申请日：2017-06-23

    Applicant: General Electric Company

    Inventor： Ruxi Wang ,  Douglas Link ,  Melissa Freeman ,  Fengfeng Tao ,  Juan Antonio Sabate ,  Eladio Clemente Delgado

    IPC: G02B26/00 ,  H02G5/00 ,  G01R33/04 ,  G01R35/04 ,  G01R22/00

    Abstract: The present disclosure presents techniques to facilitate improving operation of an electrical system, which includes a bus structure that cascades multiple electrical devices. The bus structure includes a first outer conductive layer implemented as a positive layer; a second outer conductive layer implemented as a negative layer; a first intermediate conductive layer neighboring the first outer conductive layer; a second intermediate conductive layer neighboring the second outer conductive layer; and a third intermediate conductive layer neighboring the second intermediate conductive layer, in which the third intermediate conductive layer is implemented as an inter-device layer that facilitates electrically coupling at least two of the electrical devices in series. The first intermediate conductive layer is implemented as a negative layer and the second intermediate conductive layer is implemented as a positive layer to facilitate reducing stray inductance and/or increasing stray capacitance introduced in the electrical system during operation.

    MAGNETIC RESONANCE IMAGING SWITCHING POWER AMPLIFIER SYSTEM AND METHODS
    8.
    发明申请
    MAGNETIC RESONANCE IMAGING SWITCHING POWER AMPLIFIER SYSTEM AND METHODS 审中-公开

    公开(公告)号：US20180372819A1

    公开(公告)日：2018-12-27

    申请号：US15634598

    申请日：2017-06-27

    Applicant: General Electric Company

    Inventor： Ruxi Wang ,  Xiaohu Liu ,  Han Peng ,  Fengfeng Tao ,  Juan Antonio Sabate

    IPC: G01R33/385 ,  G01R33/36

    CPC classification number: G01R33/3852 ,  G01R33/36 ,  G01R33/3856 ,  G01R33/422

    Abstract: This disclosure regards a magnetic resonance imaging system including a scanner, and gradient drivers. The scanner is to be implemented within a scan room that is shielded from electromagnetic interference. Gradient coils are designed to create a linear gradient in the magnetic field generated in the scanner by a primary magnet. These coils are energized by gradient drivers. The gradient drivers use transformers and other electrical devices in a switching stage configured to generate pulse-width-modulated power. The transformers may have non-magnetic cores to facilitate implementing the gradient drivers within the scan room. The gradient drivers also use a filtering stage which uses inductors and other electrical devices to smooth the pulse-width-modulated power. The inductors within the filters may have non-magnetic cores to facilitate implementing the gradient driver within the scan room. Additionally, an inductor with a hollow wire may be used to circulate fluid to facilitate cooling the gradient driver.

    Systems and methods for controlling an electrical power supply
    9.
    发明授权
    Systems and methods for controlling an electrical power supply 有权

    公开(公告)号：US09722511B2

    公开(公告)日：2017-08-01

    申请号：US13711483

    申请日：2012-12-11

    Applicant: General Electric Company

    Inventor： Luis Jose Garces ,  Juan Antonio Sabate ,  Di Zhang

    IPC: H02M7/5395 ,  H02M7/5387

    CPC classification number: H02M7/5395 ,  H02M7/53871

    Abstract: Systems and methods for controlling an electrical power supply are provided. One system includes an input configured for receiving voltage measurement signals for the power supply and a controller for one or more electrical phases of the power supply. The controller includes an integrator configured to integrate the received voltage measurement signals and to generate integrated control signals or integrated error signals. The controller is configured to generate an output signal using the integrated control signals or the integrated error signals. The system also includes an output configured to output the output signal to control switching of the power supply.

    Systems and methods for monitoring junction temperature of a semiconductor switch
    10.
    发明授权
    Systems and methods for monitoring junction temperature of a semiconductor switch 有权

    公开(公告)号：US10955297B2

    公开(公告)日：2021-03-23

    申请号：US16002769

    申请日：2018-06-07

    Applicant: General Electric Company

    Inventor： Ruxi Wang ,  Peter Almern Losee ,  Juan Antonio Sabate ,  Krishna Mainali ,  Tomas Sadilek

    IPC: G01K7/00 ,  G01K7/01 ,  H01L29/78 ,  H01L29/16

    Abstract: A system for monitoring a junction temperature of a semiconductor device includes a sensing resistor electrically coupled to a source terminal of the semiconductor device in a gate loop of the semiconductor device. The system includes a detection circuit electrically coupled to the gate loop of the semiconductor device and configured to measure a voltage difference across the sensing resistor. The system also includes an electronic control unit electrically coupled to the gate loop and the detection circuit. The electronic control unit is configured to determine a first gate current peak during a switching process of the semiconductor device, wherein the first gate current peak is determined based on the voltage detected by the detection circuit. The electronic control unit is configured to determine the junction temperature based on the first gate current peak.

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