公开(公告)号：US20190086493A1

公开(公告)日：2019-03-21

申请号：US15708574

申请日：2017-09-19

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Zhenen Cao ,  Tiezheng Chen ,  Jie Zhou ,  Tao Ma ,  Margaret Wiza ,  Jiabin Yao ,  Juan Sabate

IPC: G01R33/385 ,  H03F3/217 ,  H03K7/08 ,  H03F1/56

Abstract: A gradient amplifier for use in a MRI system can be located in the scan room. The gradient amplifier includes pair of rails connected to a gradient power supply. The gradient amplifier also includes a H-bridge of switches which includes a first high side switch and a first low side switch connected in series between the pair of rails, and a second high side switch and a second low side switch connected in series between the pair of rails. The gradient amplifier further includes a first high side driver circuit, a first low side driver circuit, a second high side driver circuit, and a second low side driver circuit, each configured to drive the corresponding switch in the H-bridge. A common power source supplies power to all driver circuits, wherein power is supplied to the high side driver circuits through bootstrap circuits.

公开(公告)号：US20170285119A1

公开(公告)日：2017-10-05

申请号：US15475905

申请日：2017-03-31

Applicant: General Electric Company

Inventor： Viswanathan Kanakasabai ,  Rajendra Naik ,  Juan Sabate ,  Michael Rose ,  Jayanti Ganesh

IPC: G01R33/36 ,  G01R33/561 ,  H02J3/32 ,  G01R33/385 ,  H02J3/36 ,  H02J7/00

CPC classification number: G01R33/3614 ,  A61B6/032 ,  A61B6/56 ,  G01R33/28 ,  G01R33/3852 ,  G01R33/5616 ,  H02J7/0068 ,  H02J7/34

Abstract: A method of handling a peak power requirement of a medical imaging device 106 is presented. The method includes determining, using at least one controlling unit 107, 108, a first voltage corresponding to a direct current (DC) link 116, a second voltage corresponding to one or more energy storage devices 110, or a combination thereof, where a power source 102 is coupled to a plurality of loads via the DC link, and the energy storage devices are coupled to the DC link. Further, the method includes comparing, using the at least one controlling unit, the first voltage with a first reference value and the second voltage with a second reference value and regulating, using at least one controlling unit, at least one of the first voltage and the second voltage based on the comparison, to handle the peak power requirement of the medical imaging device.

公开(公告)号：US20170322269A1

公开(公告)日：2017-11-09

申请号：US15523162

申请日：2015-10-27

Applicant: General Electric Company

Inventor： Ruxi Wang ,  Juan Sabate ,  Song Chi ,  Ying Mei

IPC: G01R33/385 ,  G01R33/54 ,  H03F3/217

CPC classification number: G01R33/3852 ,  G01R33/543 ,  H03F3/217 ,  H03F2200/372

Abstract: A method is used for operating a switching amplifier, the switching amplifier includes a plurality of cascade elements. The method includes: coupling the cascade elements in series between two terminals of a load; providing two leg circuits each comprised of switches in each of the cascade elements; and controlling all of the switches comprised in the switching amplifier using space vector modulation (SVM), such that a change of a common mode (CM) voltage generated by the switching amplifier is in a predetermined range.

公开(公告)号：US10302718B2

公开(公告)日：2019-05-28

申请号：US15523162

申请日：2015-10-27

Applicant: General Electric Company

Inventor： Ruxi Wang ,  Juan Sabate ,  Song Chi ,  Ying Mei

IPC: G01R33/54 ,  H03F3/217 ,  G01R33/385

Abstract: A method is used for operating a switching amplifier, the switching amplifier includes a plurality of cascade elements. The method includes: coupling the cascade elements in series between two terminals of a load; providing two leg circuits each comprised of switches in each of the cascade elements; and controlling all of the switches comprised in the switching amplifier using space vector modulation (SVM), such that a change of a common mode (CM) voltage generated by the switching amplifier is in a predetermined range.

公开(公告)号：US20180329045A1

公开(公告)日：2018-11-15

申请号：US15593370

申请日：2017-05-12

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Han Peng ,  John Glaser ,  Kieran Wall ,  Juan Sabate

IPC: G01S7/52 ,  A61B8/00

CPC classification number: G01S7/5208 ,  A61B8/4477 ,  G01S7/5202

Abstract: There is set forth herein an ultrasound signal generating circuit having a control circuit which can include a control circuit having a control signal generating circuit; a low power signal driver circuit for providing a low power ultrasound signal; a high power signal driver circuit for providing a high power ultrasound signal; and a radiofrequency switch configured to transmit the low power ultrasound signal and the high power ultrasound signal to the ultrasound probe, wherein the radiofrequency switch isolates the low power signal driver circuit from the high power signal driver circuit; wherein the ultrasound signal generating circuit is configured so that the radiofrequency switch transmits an output low power ultrasound signal output by the low power signal driver circuit or an output high power ultrasound signal output by the high power signal driver circuit based on an output of the control signal generating circuit.