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公开(公告)号：US09537410B2
公开(公告)日：2017-01-03
申请号：US14482969
申请日：2014-09-10
Applicant: General Electric Company
Inventor： Rui Zhou , Luis Jose Garces , Ravisekhar Nadimpalli Raju , Rixin Lai , Di Zhang
CPC classification number: H02M3/33569 , H02M1/44 , H02M2001/0058 , H02M2007/4835 , Y02B70/1491
Abstract: A system and method for series connecting electronic power devices are disclosed. In one embodiment, a switching device system includes a first upper arm electrically coupled to a first lower arm and a second upper arm electrically coupled to a second lower arm. Each of the arms include a plurality of low voltage sub-modules connected in series and each plurality of low voltage sub-modules includes an auxiliary switching device, a series switching device, and a capacitor. Each plurality of low voltage sub-modules is configured to be sequentially switched using the auxiliary switching device and the series switching device separately in the upper arms and the respective lower arms to control change in voltage over time (dV/dt) while selectively blocking a desired high voltage. Further, a capacitor voltage balancing (sorting or rotating) algorithm may be used to actively balance voltage across each plurality of low voltage sub-modules.
Abstract translation: 公开了一种用于串联电子功率器件的系统和方法。 在一个实施例中，开关装置系统包括电耦合到第一下臂的第一上臂和电耦合到第二下臂的第二上臂。 每个臂包括串联连接的多个低压子模块，并且每个低压子模块包括辅助开关装置，串联开关装置和电容器。 每个多个低压子模块被配置为使用辅助开关装置和串联开关装置在上臂和相应的下臂中分开地依次切换以控制电压随时间的变化（dV / dt），同时选择性地阻塞 所需高电压。 此外，可以使用电容器电压平衡（分选或旋转）算法来主动平衡每个低压子模块的电压。
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42.发明授权Multi-level DC-DC converter with galvanic isolation and adaptive conversion ratio 有权具有电流隔离和自适应转换比的多级DC-DC转换器公开(公告)号：US09520798B2
公开(公告)日：2016-12-13
申请号：US14469002
申请日：2014-08-26
Applicant: General Electric Company
Inventor： Ravisekhar Nadimpalli Raju , Rajib Datta , Xu She
CPC classification number: H02M3/33569 , H02M3/285 , H02M2001/0074 , Y02B70/1433
Abstract: A multi-level DC-DC converter includes an input side to receive a DC power having an input voltage and current, an output side to provide power to a load at a desired output voltage and current, and a plurality of tranformer-isolated DC-DC converters connected between the input and output sides, with the tranformer-isolated DC-DC converters being connected in series on one side and connected in parallel on another side. Each of the tranformer isolated DC-DC converters further includes a power transformer having a primary winding and a secondary winding, and a plurality of switching devices each selectively operable in one of an On state and an Off state. Operating the switching devices in a complementary On state and Off state alternately at a controlled switching frequency provides for engaging the tranformer isolated DC-DC converter and operating the switching devices in a simultaneously On state bypasses the transformer isolated DC-DC converter.
Abstract translation: 多级DC-DC转换器包括：输入侧，用于接收具有输入电压和电流的DC电力;输出侧，以期望的输出电压和电流向负载提供电力;以及多个转换器隔离DC- DC转换器连接在输入和输出侧之间，变压器隔离式DC-DC转换器在一侧串联连接，另一侧并联连接。 每个变压器隔离DC-DC转换器还包括具有初级绕组和次级绕组的电力变压器，以及多个开关装置，每个开关装置可以选择性地在“开”状态和“关”状态之一工作。 以受控的开关频率交替地将开关器件工作在互补的导通状态和关断状态，提供了与变压器隔离的DC-DC转换器并且同时操作开关器件的接通状态绕过变压器隔离的DC-DC转换器。
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公开(公告)号：US09515565B2
公开(公告)日：2016-12-06
申请号：US14200937
申请日：2014-03-07
Applicant: General Electric Company
Inventor： Ranjan Kumar Gupta , Luis Jose Garces , Ravisekhar Nadimpalli Raju
IPC: H02M5/458 , H02J3/36 , H02M1/12 , H02M7/162 , H02M7/521 , H02M3/158 , H02M1/00 , H02M7/483 , H02M7/757
CPC classification number: H02M5/4585 , H02J3/36 , H02M1/12 , H02M3/158 , H02M7/162 , H02M7/521 , H02M7/7575 , H02M2001/007 , H02M2001/0077 , H02M2007/4835 , Y02E60/60
Abstract: A hybrid HVDC converter system includes at least one alternating current (AC) conduit, at least one transformer coupled to said at least one AC conduit, and at least one direct current (DC) conduit. The hybrid HVDC converter system also includes at least one capacitor commutated converter (CCC) configured to convert AC voltages and AC currents to a DC voltage and DC current. The at least one CCC is coupled to the at least one AC conduit through the at least one transformer. The hybrid HVDC converter system further includes at least one self-commutated converter (SCC) configured to convert AC voltages and AC currents to a regulated DC voltage and DC current. The at least one SCC includes at least one AC/DC stage and at least one DC/DC stage coupled to the at least one AC/DC stage.
Abstract translation: 混合HVDC转换器系统包括至少一个交流（AC）导管，耦合到所述至少一个AC导管的至少一个变压器和至少一个直流（DC）导管。 混合HVDC转换器系统还包括被配置为将AC电压和AC电流转换为DC电压和DC电流的至少一个电容器换向转换器（CCC）。 所述至少一个CCC通过所述至少一个变压器耦合到所述至少一个AC导管。 混合HVDC转换器系统还包括至少一个自整流转换器（SCC），其配置成将AC电压和AC电流转换成稳压的DC电压和DC电流。 所述至少一个SCC包括耦合到所述至少一个AC / DC级的至少一个AC / DC级和至少一个DC / DC级。
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公开(公告)号：US20140092660A1
公开(公告)日：2014-04-03
申请号：US13953153
申请日：2013-07-29
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Di Zhang , Luis José Garcés Rivera , Ravisekhar Nadimpalli Raju , Rixin Lai , Andrew Allen Rockhill
IPC: H02M7/217
CPC classification number: H02M7/217 , H02M7/487 , H02M7/53871 , H02M7/7575 , H02M2007/4835 , Y02E60/60
Abstract: A power converter includes at least one leg with a first string including a plurality of controllable semiconductor switches, a first connecting node, and a second connecting node, wherein the first string is operatively coupled across a first bus and a second bus. The at least one leg also includes a second string operatively coupled to the first string via the first connecting node and the second connecting node, wherein the second string includes a plurality of switching units. The first string includes a first branch and a second branch, wherein the second branch is operatively coupled to the first branch via a third connecting node and the third connecting node is coupled to a ground connection.
Abstract translation: 功率转换器包括具有包括多个可控半导体开关的第一串的至少一个支脚，第一连接节点和第二连接节点，其中第一串可跨第一总线和第二总线可操作地耦合。 所述至少一个腿还包括经由所述第一连接节点和所述第二连接节点可操作地耦合到所述第一串的第二串，其中所述第二串包括多个开关单元。 第一串包括第一分支和第二分支，其中第二分支经由第三连接节点可操作地耦合到第一分支，并且第三连接节点耦合到接地连接。
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公开(公告)号：US10763655B2
公开(公告)日：2020-09-01
申请号：US16124169
申请日：2018-09-06
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Xu She , Rajib Datta , Ravisekhar Nadimpalli Raju , Maja Harfman-Todorovic , Philip Michael Cioffi
Abstract: An electrical system includes a power electronics system and a bus bar coupled to the power electronic system. The power electronics system includes a switching device configured to selectively connect and disconnect. The bus bar includes a first conductive layer and a second conductive layer. The first conductive layer is disposed directly adjacent a first insulation layer, wherein the first conductive layer is configured to conduct a first polarity of electrical power to, from, or both the power electronics system. The second conductive layer is disposed directly adjacent the first insulation layer, and is configured to conduct a second polarity of electrical power opposite the first polarity to, from, or both the power electronics system. The first conductive layer comprises a first thickness half a second thickness of the second conductive layer.
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Patent Agency Ranking
公开(公告)号：US20200158085A1
公开(公告)日：2020-05-21
申请号：US16752626
申请日：2020-01-25
Applicant: General Electric Company
Inventor： Robert Gregory Wagoner , Govardhan Ganireddy , Saurabh Shukla , Rajni Kant Burra , Ravisekhar Nadimpalli Raju , Rui Zhou , Rajib Datta , John Leo Bollenbecker
Abstract: Power converters for use in wind turbine systems are included. For instance, a wind turbine system can include a full power generator having a stator and a rotor. The generator is configured to provide a low voltage alternating current power on a stator bus of the wind turbine system. The wind turbine system includes a power converter configured to convert the low voltage alternating current power provided on the stator bus to a medium voltage multiphase alternating current output power suitable for provision to the electrical grid. The power converter includes a plurality of conversion modules, each conversion module comprising a plurality of bridge circuits. Each bridge circuit includes a plurality of silicon carbide switching devices coupled in series. Each conversion module is configured to provide a single phase of the medium voltage multiphase alternating current output power on a line bus of the wind turbine system.
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公开(公告)号：US10411473B2
公开(公告)日：2019-09-10
申请号：US15399001
申请日：2017-01-05
Applicant: General Electric Company
Inventor： Robert Gregory Wagoner , Govardhan Ganireddy , Saurabh Shukla , Rajni Kant Burra , Ravisekhar Nadimpalli Raju , Rui Zhou , Rajib Datta , John Leo Bollenbecker
Abstract: Power converters for use in energy systems are included. For instance, an energy system can include an input power source configured to provide a low voltage direct current power. The energy system can include a power converter configured to convert the low voltage direct current power provided by the input power source to a medium voltage multiphase alternating current output power suitable for provision to an alternating current power system. The power converter can include a plurality conversion modules. Each conversion module includes a plurality of bridge circuits. Each bridge circuit includes a plurality of silicon carbide switching devices coupled in series. Each conversion module is configured to provide a single phase of the medium voltage multiphase alternating current output power on a line bus of the energy system.
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公开(公告)号：US10404186B2
公开(公告)日：2019-09-03
申请号：US15336413
申请日：2016-10-27
Applicant: General Electric Company
Inventor： Michael Joseph Schutten , Fengfeng Tao , Maja Harfman-Todorovic , Ravisekhar Nadimpalli Raju , Philip Michael Cioffi , Ljubisa Dragoljub Stevanovic
Abstract: A power module includes an input bus, a switching device, and an output bus. The input bus includes a first coating of a high permeability magnetic conductive material and is configured to receive input direct current (DC) electrical power from an electrical power source. The switching device is electrically coupled to the first input bus, and is configured to selectively connect and disconnect to facilitate converting the input DC electrical power into output alternating current (AC) electrical power. The output bus includes a second coating of the high permeability magnetic conductive material, and is electrically coupled to the first switching device. The output bus is configured to supply the output AC electrical power to an electrical load.
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公开(公告)号：US10186995B2
公开(公告)日：2019-01-22
申请号：US15405752
申请日：2017-01-13
Applicant: General Electric Company
Inventor： Dong Dong , Robert Gregory Wagoner , Govardhan Ganireddy , Ravisekhar Nadimpalli Raju , Rui Zhou
Abstract: Systems and methods for operating a power converter with a plurality of inverter blocks with silicon carbide MOSFETs are provided. A DC to AC converter can include a plurality of inverter blocks. Each inverter block can include a plurality of switching devices. A control method can include identifying one of a plurality of switching patterns for operation of the inverter block for each inverter block. Each switching pattern can include a plurality of switching commands. The control method can further include controlling each inverter block based on the identified switching pattern for the inverter block. The control method can further include rotating the switching patterns among the plurality of inverter blocks.
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公开(公告)号：US10033298B1
公开(公告)日：2018-07-24
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
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.
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