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    SYSTEM AND METHOD FOR SOFT SWITCHING POWER INVERSION
    1.
    发明申请
    SYSTEM AND METHOD FOR SOFT SWITCHING POWER INVERSION 有权
    软开关电源逆变系统与方法

    公开(公告)号：US20160352253A1

    公开(公告)日：2016-12-01

    申请号：US14722251

    申请日：2015-05-27

    Applicant: General Electric Company

    Inventor： Xiaohu Liu ,  Luis Jose Garces ,  Maja Harfman Todorovic ,  Mohammed Agamy

    IPC: H02M7/5387

    CPC classification number: H02M7/53871 ,  H02M2001/0058 ,  Y02B70/1491

    Abstract: A power inversion system includes an input and output coupleable to a DC power and an AC load, respectively, and a power inverter including a plurality of phase legs each having two bridge legs coupled in parallel with at least two switch and antiparallel diode pairs coupled in series. The system also includes a plurality of inductors, with at least one inductor coupled between a midpoint of each bridge leg and an LCL filter, the inductors in each phase leg being magnetically coupled. The system further includes a control system to drive the power inverter in a soft switching configuration, the control system programmed to output a switching signal to the power inverter according to a duty cycle and a phase shift angle, determine a value of the duty cycle, and optimize the phase shift angle of the power inverter based on the value of the duty cycle.

    Abstract translation: 功率反转系统包括分别耦合到DC电源和AC负载的输入和输出，以及功率逆变器，其包括多个相位支路，每个相位支路具有与至少两个耦合到其中的开关和反并联二极管对并联耦合的两个桥脚 系列。 该系统还包括多个电感器，其中至少一个电感器耦合在每个桥接支腿的中点和LCL滤波器之间，每个相位支路中的电感器被磁耦合。 该系统还包括控制系统，用于以软切换配置来驱动电力逆变器，所述控制系统被编程为根据占空比和相移角将切换信号输出到功率逆变器，确定占空比的值， 并根据占空比的值优化功率逆变器的相移角。

    System and method for soft switching power inversion
    3.
    发明授权
    System and method for soft switching power inversion 有权

    公开(公告)号：US09705422B2

    公开(公告)日：2017-07-11

    申请号：US14722251

    申请日：2015-05-27

    Applicant: General Electric Company

    Inventor： Xiaohu Liu ,  Luis Jose Garces ,  Maja Harfman Todorovic ,  Mohammed Agamy

    IPC: H02M7/538 ,  H02M7/5387 ,  H02M1/00

    CPC classification number: H02M7/53871 ,  H02M2001/0058 ,  Y02B70/1491

    Abstract: A power inversion system includes an input and output coupleable to a DC power and an AC load, respectively, and a power inverter including a plurality of phase legs each having two bridge legs coupled in parallel with at least two switch and antiparallel diode pairs coupled in series. The system also includes a plurality of inductors, with at least one inductor coupled between a midpoint of each bridge leg and an LCL filter, the inductors in each phase leg being magnetically coupled. The system further includes a control system to drive the power inverter in a soft switching configuration, the control system programmed to output a switching signal to the power inverter according to a duty cycle and a phase shift angle, determine a value of the duty cycle, and optimize the phase shift angle of the power inverter based on the value of the duty cycle.

    Magnetic resonance imaging switching power amplifier system and methods
    4.
    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.

    MAGNETIC RESONANCE IMAGING SWITCHING POWER AMPLIFIER SYSTEM AND METHODS
    5.
    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.

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