公开(公告)号：US09426854B1

公开(公告)日：2016-08-23

申请号：US14953451

申请日：2015-11-30

Applicant: General Electric Company

Inventor： Ramanujam Ramabhadran ,  Eric Lavigne ,  Michael James Hartman ,  Danijel Maricic

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0809 ,  H05B33/0845 ,  Y02B20/346

Abstract: An electronic driver for operating an illumination device is provided. The electronic driver includes a power converter configured to illuminate the illumination device. The power converter includes a switch capacitor circuit configured to perform at least one of a pulse width modulation dimming and a visible light communication using the illumination device. The switch capacitor circuit includes a plurality of split capacitors operatively coupled in series to a second end of a primary winding of a transformer in the power converter and a control switch operatively coupled to the plurality of split capacitors. The power converter also includes a controller operatively coupled to the control switch and is configured to control the control switch to perform at least one of the pulse width modulation dimming and the visible light communication.

Abstract translation: 提供一种用于操作照明装置的电子驱动器。 电子驱动器包括被配置为照亮照明装置的功率转换器。 功率转换器包括开关电容器电路，其被配置为执行使用该照明装置的脉宽调制调光和可见光通信中的至少一个。 开关电容器电路包括多个分离电容器，其可操作地耦合到功率转换器中的变压器的初级绕组的第二端，以及可操作地耦合到多个分离电容器的控制开关。 功率转换器还包括可操作地耦合到控制开关的控制器，并且被配置为控制控制开关执行脉冲宽度调制调光和可见光通信中的至少一个。

公开(公告)号：US20150146931A1

公开(公告)日：2015-05-28

申请号：US14087609

申请日：2013-11-22

Applicant: General Electric Company

Inventor： Danijel Maricic ,  Ramanujam Ramabhadran ,  Mohamed Cherif Ghanem

IPC: G06T7/00 ,  G06T7/60 ,  G06T7/40

CPC classification number: G06T7/0004 ,  G06T7/60 ,  G06T7/90 ,  G06T2207/10024 ,  H05B33/0863 ,  H05B37/0227

Abstract: A method for operating illumination sources includes receiving a first set of images of one or more illumination sources that are generated by an image capturing device. The method further includes computing a first distance and a first perspective angle between the image capturing device and each illumination source during the generation of the first set of images. Furthermore, the method includes generating first characteristic information for each illumination source based on a comparison between at least one of the first distance or the first perspective angle for each illumination source with at least one of a predefined distance or a predefined perspective angle for each illumination source. The method also includes generating a command signal based on a comparison between the first characteristic information and a predefined characteristic threshold for each of the one or more illumination sources.

Abstract translation: 一种用于操作照明源的方法包括接收由图像捕获装置产生的一个或多个照明源的第一组图像。 该方法还包括在第一组图像的生成期间计算图像捕获装置与每个照明源之间的第一距离和第一透视角。 此外，该方法包括基于每个照明源的第一距离或第一透视角中的至少一个与每个照明的预定距离或预定透视角中的至少一个之间的比较来生成每个照明源的第一特征信息 资源。 该方法还包括基于第一特征信息和一个或多个照明源中的每一个的预定特征阈值之间的比较产生命令信号。

公开(公告)号：US20150002025A1

公开(公告)日：2015-01-01

申请号：US13931272

申请日：2013-06-28

Applicant: General Electric Company

Inventor： Danijel Maricic ,  Ramanujam Ramabhadran ,  John Thomas Garrity

IPC: H05B33/08

CPC classification number: H05B33/0851

Abstract: In accordance with one embodiment, a lighting assembly is provided. The lighting assembly includes a first light unit configured to operate at a first duty cycle and a second light unit configured to operate at a second duty cycle. The second duty cycle is less than the first duty cycle, and the first and second light units emit light having a same wavelength.

Abstract translation: 根据一个实施例，提供照明组件。 照明组件包括被配置为在第一占空比下操作的第一灯单元和被配置为在第二占空比下操作的第二灯单元。 第二占空比小于第一占空比，第一和第二光单元发射具有相同波长的光。

公开(公告)号：US20200212909A1

公开(公告)日：2020-07-02

申请号：US16238348

申请日：2019-01-02

Applicant: General Electric Company

Inventor： Ramanujam Ramabhadran ,  Krishna Mainali ,  Kum-Kang Huh ,  Maja Harfman-Todorovic ,  Robert James Thomas ,  Cong Li

IPC: H03K17/16 ,  H03K17/042 ,  H02M1/08

Abstract: Aspects of the present disclosure are directed toward designs and methods of improving driving of switching devices. One proposed solution to improving driving of switching devices is an auxiliary control circuit that selectively guides the switching device through at least one switching region, permitting an improved operation of the switching device.

公开(公告)号：US10374591B2

公开(公告)日：2019-08-06

申请号：US15397443

申请日：2017-01-03

Applicant: General Electric Company

Inventor： Ramanujam Ramabhadran ,  Sayan Acharya ,  Han Peng ,  Maja Harfman Todorovic ,  Ahmed Elasser ,  Robert Thomas

IPC: H01L29/16 ,  H01L29/20 ,  H01L29/24 ,  H03K17/06 ,  H03K17/16 ,  H01L29/778 ,  H03K17/0812

Abstract: Systems and methods provided herein relate to a gate drive circuit for controlling operation of a wide bandgap semiconductor switch. The systems and methods receive a control signal and configuring an operation signal configured to activate a wide bandgap switch (WBG switch). A profile of the operation signal being based on electrical characteristics of first and second shaping circuits. The systems and methods further deliver the operation signal to the WBG switch.

公开(公告)号：US20190068045A1

公开(公告)日：2019-02-28

申请号：US15682940

申请日：2017-08-22

Applicant: General Electric Company

Inventor： Ramanujam Ramabhadran ,  Robert James Thomas ,  Ahmed Elasser

IPC: H02M1/08 ,  H01F27/42 ,  H01F27/29 ,  H02M1/32 ,  H02M1/44 ,  H05K1/11 ,  H05K1/18 ,  H05K1/16 ,  H05K1/02

Abstract: A power electronics circuit is disclosed that includes a switching circuit comprising a first solid-state device coupled in series with a second solid-state device, with at least the first solid-state device comprising a solid-state switch having a gate terminal. The power electronics circuit also includes a current sense transformer positioned between the first and second solid-state devices and configured to sense a current flowing on a conductive trace connecting the first and second solid-state devices, and a controller coupled to the switching circuit and the current sense transformer so as to be in operable communication therewith. The controller is programmed to receive a current sense signal from the current sense transformer indicative of the current flowing on the conductive trace and modulate a gate voltage to the gate terminal of the first solid-state device based on the received current sense signal, so as to control switching thereof.

公开(公告)号：US20180212512A1

公开(公告)日：2018-07-26

申请号：US15411422

申请日：2017-01-20

Applicant: General Electric Company

Inventor： Ravisekhar Nadimpalli Raju ,  Ramanujam Ramabhadran ,  Ljubisa Dragoljub Stevanovic ,  William George Earls

IPC: H02M1/32 ,  H02M1/08 ,  H02M7/217

CPC classification number: H02M1/32 ,  H02M7/217

Abstract: Systems and methods for providing automatic short circuit protection in an electrical system via a switching device. In some embodiments, the switching device includes a switching transistor that selectively switches between an open position and a closed position based at least in part on a switching control signal, for example, to facilitate converting electrical power with first electrical characteristics output into electrical power with the second electrical characteristics. Additionally, the switching device includes a protection transistor electrically coupled in series with the switching transistor, in which a constant gate voltage is supplied to the protection transistor to maintain the first protection transistor in the closed position during operation of the power converter; and the protection transistor automatically limits current flow through the first switching device by reducing a gate voltage applied to the switching transistor when a short circuit is expected to be present in the electrical system.

公开(公告)号：US09887634B2

公开(公告)日：2018-02-06

申请号：US14806793

申请日：2015-07-23

Applicant: General Electric Company

Inventor： Ramanujam Ramabhadran ,  Yehuda Daniel Levy ,  Xu She

IPC: H02M3/335 ,  H02M1/00 ,  H02M7/757 ,  H02M5/42 ,  H02M7/04 ,  H02M7/68

CPC classification number: H02M3/33592 ,  H02M3/33546 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A resonant converter includes a primary stage having first and second switches coupled in series, a controller coupled to the first switch and the second switch to control operation thereof, a first transformer comprising a primary coil coupled to a node between the first and second switches, and a resonant inductor coupled to the primary coil of the first transformer. The resonant converter also includes a secondary stage having a second transformer formed of a primary coil coupled to the resonant inductor and a secondary coil comprising first and second coil sections, a third switch coupled to the first coil section of the secondary coil, and a fourth switch coupled to the second coil section of the secondary coil. A switch drive circuit is provided to drive the third and fourth switches for synchronous rectification, with the switch drive circuit comprising a secondary coil of the first transformer.

公开(公告)号：US09787303B2

公开(公告)日：2017-10-10

申请号：US14958411

申请日：2015-12-03

Applicant: General Electric Company

Inventor： Yehuda Daniel Levy ,  Ramanujam Ramabhadran

IPC: H03K19/00 ,  H03K17/687 ,  H05B33/08 ,  H03K17/567

CPC classification number: H03K17/687 ,  H02M1/08 ,  H03K17/063 ,  H03K17/567 ,  H03K2017/066 ,  H03K2217/0063 ,  H03K2217/0081 ,  H05B33/0815 ,  H05B33/0845

Abstract: There are provided a driver circuit, a method of driving a power switch, and a ballast circuit. For example, there is provided a driver circuit configured to receive a control signal and operate a power switch. The driver circuit includes a first switch, a second switch, and a capacitor coupled to control terminals of the first and second switches. The driver circuit further includes a first diode coupled to a first bias terminal of the driver circuit and to the capacitor. Furthermore, the driver circuit includes a second diode coupled to a second bias terminal of the driver circuit and to a terminal of the power switch.

公开(公告)号：US20170179829A1

公开(公告)日：2017-06-22

申请号：US14975349

申请日：2015-12-18

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Ramanujam Ramabhadran ,  Jeffrey Joseph Nasadoski ,  Yehuda Daniel Levy ,  Shimon Khananshvili ,  Pradeep Vijayan ,  Bruce Richard Roberts

IPC: H02M3/158 ,  H02M1/12 ,  H05B33/08 ,  H02M1/42 ,  H05B37/02

CPC classification number: H02M3/1582 ,  H02M1/12 ,  H02M1/4208 ,  H02M1/4225 ,  H05B33/0815 ,  Y02B70/126

Abstract: An electronic device includes a controller configured to regulate one or more voltages or currents of a power converter. The controller is configured to receive an input voltage of the power converter, determine whether the power converter is operating in a first mode of operation or a second mode of operation based at least in part on the input voltage, generate a multiplier reference signal for the power converter based on whether the power converter is operating in the first mode of operation or the second mode of operation, and adjust an input current of the power converter based at least in part on the multiplier reference signal. Adjusting the input current includes correcting the input current to be substantially identical in form to the input voltage.