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1. 发明申请

US20130343089A1 SCALABLE-VOLTAGE CURRENT-LINK POWER ELECTRONIC SYSTEM FOR MULTI-PHASE AC OR DC LOADS 审中-公开
标题翻译：用于多相交流或直流负载的可分级电流链路功率电子系统
公开(公告)号：US20130343089A1
公开(公告)日：2013-12-26
申请号：US13531629
申请日：2012-06-25
申请人： Ranjan Kumar Gupta , Ravisekhar Nadimpalli Raju , Rajib Datta , Mohammed Agamy
发明人： Ranjan Kumar Gupta , Ravisekhar Nadimpalli Raju , Rajib Datta , Mohammed Agamy
IPC分类号： H02M3/335
CPC分类号： H02M7/4807 , H02M7/487 , H02M7/49 , H02M2001/0074 , H02M2001/0077 , H02M2007/4818 , Y02B70/1441
摘要： An electronics power system includes a plurality of substantially identical power electronic modules. Each power electronic module includes a single-phase DC/AC inverter having an output side. Each power electronic module further includes a medium/high-frequency-isolated DC/DC current-to-voltage converter having an input side. The medium/high-frequency-isolated DC/DC current-to-voltage converter drives the single-phase DC/AC inverter. Each DC/DC converter and its corresponding DC/AC inverter are connected back-to-back sharing a common DC-link. The plurality of power electronics modules is stacked together in series at the input side and in parallel or series/parallel at the output side.
摘要翻译：电子电力系统包括多个基本相同的电力电子模块。每个电力电子模块包括具有输出侧的单相DC / AC逆变器。每个电力电子模块还包括具有输入侧的中/高频隔离DC / DC电流 - 电压转换器。中/高频隔离DC / DC电流 - 电压转换器驱动单相DC / AC逆变器。每个DC / DC转换器及其相应的DC / AC逆变器都背对背连接共享一个直流链路。多个电力电子模块在输入侧串联堆叠在一起，并且在输出侧并联或串联/并联。

2. 发明授权

US08379416B1 Power conversion system and method 失效
标题翻译：电力转换系统及方法
公开(公告)号：US08379416B1
公开(公告)日：2013-02-19
申请号：US13219961
申请日：2011-08-29
申请人： Rajib Datta , Ravisekhar Nadimpalli Raju
发明人： Rajib Datta , Ravisekhar Nadimpalli Raju
IPC分类号： H02J3/00
CPC分类号： H02M5/4505 , H02J3/1814 , H02J3/36 , H02M1/4216 , H02M5/451 , H02M7/49 , H02M2007/53876 , Y02B70/126 , Y02E40/18 , Y02E60/60
摘要： A power conversion system includes a power transformer for receiving AC power at a first voltage from an input side and for delivering AC power at a second voltage to an output side. A power converter is also included in the power conversion system wherein the power converter includes an input side converter on the input side and an output side converter on the output side coupled through a plurality of DC links. A converter controller in the power converter provides control signals to the input side converter and the output side converter for regulating an active power and a reactive power flow through the power converter. Each of the input side converters and the output side converters includes at least two power converter transformers coupled between respective power converter bridges coupled to the plurality of DC links and the input side or to the plurality of DC links and the output side.
摘要翻译：电力转换系统包括电力变压器，用于从输入侧接收来自第一电压的交流电力，并将第二电压的交流电输出到输出侧。功率转换器还包括在功率转换系统中，其中功率转换器包括输入侧的输入侧转换器和通过多个DC链路耦合的输出侧的输出侧转换器。功率转换器中的转换器控制器向输入侧转换器和输出侧转换器提供控制信号，用于调节有功功率和通过功率转换器的无功功率流。每个输入侧转换器和输出侧转换器包括耦合在耦合到多个DC链路和输入侧或多个DC链路和输出侧的各个功率转换器桥之间的至少两个功率转换变换器。

3. 发明授权

US07359223B2 Power converter system and method 有权
标题翻译：电源转换器系统及方法
公开(公告)号：US07359223B2
公开(公告)日：2008-04-15
申请号：US11095227
申请日：2005-03-30
申请人： Rajib Datta , Kunlun Chen , Haiqing Weng , Ravisekhar Nadimpalli Raju
发明人： Rajib Datta , Kunlun Chen , Haiqing Weng , Ravisekhar Nadimpalli Raju
IPC分类号： H02M7/00
CPC分类号： H02M7/49
摘要： A power converter system for supplying an output voltage is provided. The power converter system is adapted to operate in a normal mode and a fault mode. The system comprises a plurality of bridges and a plurality of transformers. The system further comprises a plurality of dc link capacitors, each coupled across a corresponding bridge. The system also includes a controller adapted for, during the normal mode, switching each bridge with a respective normal phase shift. During the fault mode, the controller is adapted for switching each of the remaining ones of the bridges with a respective adjusted phase shift to generate the output voltage. During the fault mode, at least one of the plurality of bridges is bypassed.
摘要翻译：提供了用于提供输出电压的功率转换器系统。电源转换器系统适用于正常模式和故障模式。该系统包括多个桥和多个变压器。该系统还包括多个直流链路电容器，每个直流链路电容器跨越相应的桥接器耦合。该系统还包括适于在正常模式期间用相应的正相移切换每个桥的控制器。在故障模式期间，控制器适于用相应调整的相移来切换桥接中的每一个，以产生输出电压。在故障模式期间，绕过多个桥中的至少一个。

4. 发明申请

US20130051091A1 POWER CONVERSION SYSTEM AND METHOD 失效
标题翻译：电力转换系统和方法
公开(公告)号：US20130051091A1
公开(公告)日：2013-02-28
申请号：US13219961
申请日：2011-08-29
申请人： Rajib Datta , Ravisekhar Nadimpalli Raju
发明人： Rajib Datta , Ravisekhar Nadimpalli Raju
IPC分类号： H02J3/36
CPC分类号： H02M5/4505 , H02J3/1814 , H02J3/36 , H02M1/4216 , H02M5/451 , H02M7/49 , H02M2007/53876 , Y02B70/126 , Y02E40/18 , Y02E60/60
摘要： A power conversion system includes a power transformer for receiving AC power at a first voltage from an input side and for delivering AC power at a second voltage to an output side. A power converter is also included in the power conversion system wherein the power converter includes an input side converter on the input side and an output side converter on the output side coupled through a plurality of DC links. A converter controller in the power converter provides control signals to the input side converter and the output side converter for regulating an active power and a reactive power flow through the power converter. Each of the input side converters and the output side converters includes at least two power converter transformers coupled between respective power converter bridges coupled to the plurality of DC links and the input side or to the plurality of DC links and the output side.
摘要翻译：电力转换系统包括电力变压器，用于从输入侧接收来自第一电压的交流电力，并将第二电压的交流电输出到输出侧。功率转换器还包括在功率转换系统中，其中功率转换器包括输入侧的输入侧转换器和通过多个DC链路耦合的输出侧的输出侧转换器。功率转换器中的转换器控制器向输入侧转换器和输出侧转换器提供控制信号，用于调节有功功率和通过功率转换器的无功功率流。每个输入侧转换器和输出侧转换器包括耦合在耦合到多个DC链路和输入侧或多个DC链路和输出侧的各个功率转换器桥之间的至少两个功率转换变换器。

5. 发明申请

US20080304300A1 Power conversion system with galvanically isolated high frequency link 有权
标题翻译：电源转换系统采用电隔离高频链路
公开(公告)号：US20080304300A1
公开(公告)日：2008-12-11
申请号：US11810837
申请日：2007-06-06
申请人： Ravisekhar Nadimpalli Raju , Richard S. Zhang , Rajib Datta , Allen Michael Ritter , Ljubisa Dragoljub Stevanovic
发明人： Ravisekhar Nadimpalli Raju , Richard S. Zhang , Rajib Datta , Allen Michael Ritter , Ljubisa Dragoljub Stevanovic
IPC分类号： H02M7/06 , H02M7/00 , H02M7/155 , H02M7/217
CPC分类号： H02M7/217 , H02M2001/0074 , H02M2001/009 , Y02B70/1483
摘要： A power conversion system has a three-phase AC input, where each AC input phase is linked to a string of cascaded single-phase AC-DC converters placed in series with a three-phase AC-DC converter. Each single-phase AC-DC converter in one embodiment includes a silicon carbide (SiC) pulse width modulated MOSFET H-bridge that placed in series with the three-phase AC-DC converter that includes a silicon (Si) SCR bridge. The single-phase AC-DC converters and the three-phase AC-DC converter together in one embodiment include a mixed silicon-carbide (SiC) and silicon (Si) device topology.
摘要翻译：电力转换系统具有三相AC输入，其中每个AC输入相位与串联的三相AC-DC转换器串联的级联单相AC-DC转换器串联。在一个实施例中，每个单相AC-DC转换器包括与包括硅（Si）SCR桥的三相AC-DC转换器串联放置的碳化硅（SiC）脉宽调制MOSFET H桥。在一个实施例中，单相AC-DC转换器和三相AC-DC转换器一起包括混合碳化硅（SiC）和硅（Si）器件拓扑。

6. 发明申请

US20130313906A1 REMOTE LOAD BYPASS SYSTEM 审中-公开
标题翻译：远程负载旁路系统
公开(公告)号：US20130313906A1
公开(公告)日：2013-11-28
申请号：US13478310
申请日：2012-05-23
申请人： Ranjan Kumar Gupta , Christof Martin Sihler , Satish Sivarama Gunturi , Stefan Schroeder , Joseph Song Manguelle , Ravisekhar Nadimpalli Raju , Rajib Datta
发明人： Ranjan Kumar Gupta , Christof Martin Sihler , Satish Sivarama Gunturi , Stefan Schroeder , Joseph Song Manguelle , Ravisekhar Nadimpalli Raju , Rajib Datta
IPC分类号： H02H3/20 , H02J1/00
CPC分类号： H02M1/00 , Y10T307/469 , Y10T307/858
摘要： A load bypass switch enables continuous power to remote loads in the event of 1) failure of one or more remote loads, or 2) faults within the remote loads, within a dc power system. The bypass switch utilizes the passive components of the dc loads or inverters and therefore reduces overall component count. A black start method for the remote dc system uses the same passives present inside the loads/inverters and simultaneously uses some of the features of the bypass switch. A bypass-module-yard uses multiple bypass switches enabling continuous power to the remote loads in the event of failure of one or more power distribution cables (in-feed to the remote loads) located remotely in the dc system.
摘要翻译：负载旁路开关可在一个或多个远程负载故障或2）直流电源系统内的远程负载故障的情况下，实现远程负载的连续供电。旁路开关利用直流负载或逆变器的无源组件，从而减少总体组件数量。远程直流系统的黑启动方法使用负载/逆变器内部相同的无源器件，同时使用旁路开关的一些特性。旁路模块码头使用多个旁路开关，在远程在直流系统中的一个或多个配电电缆（进给远程负载）故障时，可以对远程负载进行连续供电。

7. 发明授权

US07324360B2 Power converter methods and apparatus for variable speed high power machines 有权
标题翻译：用于变速高功率机器的功率转换器方法和装置
公开(公告)号：US07324360B2
公开(公告)日：2008-01-29
申请号：US11251727
申请日：2005-10-17
申请人： Allen Michel Ritter , Richard S. Zhang , Luis Jose Garces , Rajib Datta , Ravisekhar Nadimpalli Raju , Mark E. Shepard
发明人： Allen Michel Ritter , Richard S. Zhang , Luis Jose Garces , Rajib Datta , Ravisekhar Nadimpalli Raju , Mark E. Shepard
IPC分类号： H02M7/00
CPC分类号： H02M5/272 , H02M5/271
摘要： Methods and apparatus for converting power from a power source are described. In one example embodiment, the method includes controlling multiple transformer and switchgear units coupled to a power source, and controlling multiple converter units connected in parallel. Each converter unit is coupled to a respective one of the transformer and switchgear units to form an individual thread. The transformer and switchgear unit and power converters are controlled so that the carrier waveforms for each individual thread are interleaved between each other over a carrier cycle.
摘要翻译：描述用于从电源转换功率的方法和装置。在一个示例实施例中，该方法包括控制耦合到电源的多个变压器和开关设备单元，以及控制并联连接的多个转换器单元。每个转换器单元耦合到变压器和开关设备单元中的相应一个以形成单个螺纹。控制变压器和开关设备单元和功率转换器，使得每个单独线程的载波波形在载波周期之间彼此交错。

8. 发明授权

US12107457B2 System to provide AC or DC power to electronic equipment 有权
公开(公告)号：US12107457B2
公开(公告)日：2024-10-01
申请号：US17685330
申请日：2022-03-02
申请人： Ravisekhar Nadimpalli Raju
发明人： Ravisekhar Nadimpalli Raju
IPC分类号： H02J9/06 , H02M3/156 , H02M7/537
CPC分类号： H02J9/068 , H02J9/061 , H02J9/062 , H02M3/156 , H02M7/537
摘要： A system and method is provided to provide power to a load or electronic equipment which includes a multi-pole switch that connects the input of the load or electronic equipment to a first AC source or a DC source or an optional second AC source created from the DC source through a DC-AC converter. The connection to the DC source is either direct or through a DC-DC converter that provides voltage adjustment or isolation. A controller changes the position of the switch in response to the sensing of the presence and magnitude of the sources or in response to an external command to select a preferred source.

9. 发明申请

US20110221195A1 SYSTEM AND METHOD FOR POWER CONVERSION 有权
标题翻译：用于功率转换的系统和方法
公开(公告)号：US20110221195A1
公开(公告)日：2011-09-15
申请号：US13075224
申请日：2011-03-30
申请人： Ravisekhar Nadimpalli Raju
发明人： Ravisekhar Nadimpalli Raju
IPC分类号： H02P9/04 , H02M7/48
CPC分类号： H02M7/49 , H02J3/386 , Y02E10/763 , Y10T307/707
摘要： A multilevel inverter is provided. The multilevel inverter includes a plurality of bridges, each bridge configured to receive a respective portion of an input DC power and convert the respective portion to a respective converted AC power. The multilevel inverter also includes at least one bridge controller for operating at least one of the plurality of bridges in a square waveform mode. The multilevel inverter further includes a plurality of transformers, each transformer coupled to a respective bridge and configured to increase a voltage level of the respective portion of converted AC power. The plurality of transformers further includes secondary windings coupled in series with the other secondary windings to combine the respective increased voltage level portions of the converted AC power. The multilevel inverter also includes a grid converter configured to provide output power for a power grid.
摘要翻译：提供多电平逆变器。多电平逆变器包括多个桥，每个桥被配置为接收输入DC电力的相应部分，并将相应部分转换成相应的转换AC电力。多电平逆变器还包括至少一个桥式控制器，用于以方波波形模式操作多个桥中的至少一个。多电平逆变器还包括多个变压器，每个变压器耦合到相应的桥并且被配置为增加转换的交流电力的相应部分的电压电平。多个变压器还包括与其它次级绕组串联耦合的次级绕组，以组合转换的AC电力的各个增加的电压电平部分。多电平逆变器还包括电网转换器，其配置成为电网提供输出功率。

10. 发明公开

US20240266939A1 MODULAR POWER CONVERTER WITH BYPASSABLE ISOLATED MODULES 审中-公开
公开(公告)号：US20240266939A1
公开(公告)日：2024-08-08
申请号：US18107007
申请日：2023-02-08
申请人： Ravisekhar Nadimpalli Raju
发明人： Ravisekhar Nadimpalli Raju
IPC分类号： H02M1/00 , H02M3/155 , H02M7/217
CPC分类号： H02M1/0045 , H02M3/155 , H02M7/217
摘要： A modular power conversion system is provided which includes a plurality of modules (building blocks) comprised of transformers and power conversion bridges. The modules are connected in series on either the input or output side and in parallel on the other side. A substantial number of the modules are operated in a fixed input-to-output voltage ratio, with the remaining module(s) operated in a variable input-to-output ratio. The fixed ratio modules are either placed in an active mode or in a bypassed mode. A controller sets the proportion of active and bypassed modules and controls the variable ratio modules, thus allowing an adjustable input-to-output ratio for the overall converter system. Prior to the bypassing of a module, the energy stored in its internal bus or link is dissipated or stored in an auxiliary circuit or moved to a neighboring module.

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