公开(公告)号：US20160336872A1

公开(公告)日：2016-11-17

申请号：US14710690

申请日：2015-05-13

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Zhongyuan Cheng ,  Navid Zargari

IPC: H02M7/537

CPC classification number: H02M7/487 ,  H02M3/1584 ,  H02M7/538 ,  H02M2001/007

Abstract: Power converters are presented with one or more sparse multilevel actively clamped (SMAC) power converter stages, where the individual stages include an integer number N capacitors or DC voltage sources coupled between stage DC inputs to provide L=N+1 converter stage DC voltage nodes, with a switching circuit having no more than L*(L−1) switching devices and no flying or floating DC storage capacitors, where N is greater than 2.

Abstract translation: 功率转换器具有一个或多个稀疏多电平有源钳位（SMAC）功率转换器级，其中各个级包括耦合在级DC输入之间的整数N个电容器或DC电压源，以提供L = N + 1个转换器级DC电压节点 ，具有不超过L *（L-1）个开关装置的开关电路，并且没有飞行或浮动的直流存储电容器，其中N大于2。

公开(公告)号：US20150171733A1

公开(公告)日：2015-06-18

申请号：US14628334

申请日：2015-02-23

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Navid R. Zargari ,  Yuan Xiao ,  Lixiang Wei ,  Zhongyuan Cheng

IPC: H02M1/10 ,  H02M5/458

CPC classification number: H02M1/10 ,  H02M1/32 ,  H02M5/458 ,  H02M5/4585 ,  H02M7/49 ,  H02M2001/007 ,  H02M2001/325 ,  Y10T307/549 ,  Y10T307/658 ,  Y10T307/685

Abstract: Multilevel power converters, power cells and methods are presented for selectively bypassing a power stage of a multilevel inverter circuit, in which a single relay or contactor includes one or more normally closed output control contacts coupled between a given power cell switching circuit and the given power cell output, along with a normally open bypass contact coupled across the power stage output, with a local or central controller energizing the coil of the relay or contactor of a given cell to bypass that cell.

Abstract translation: 提出了多电平功率转换器，功率单元和方法，用于选择性地旁路多电平逆变器电路的功率级，其中单个继电器或接触器包括耦合在给定功率单元开关电路和给定功率之间的一个或多个常闭输出控制触点 电池输出以及耦合在功率级输出端的常开旁路触点与本地或中央控制器通电给定电池的继电器或接触器的线圈绕过该电池。

公开(公告)号：US09054589B2

公开(公告)日：2015-06-09

申请号：US13650891

申请日：2012-10-12

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Zhongyuan Cheng ,  Yuan Xiao ,  Ghodratollah Esmaeili Rineh ,  Manish Pande ,  Navid Zargari

IPC: H02H3/00 ,  H02M1/32 ,  H02M5/451 ,  H02M5/458 ,  H02M7/525 ,  H02M7/539 ,  G01R31/02 ,  G01R31/42

CPC classification number: H02M1/32 ,  G01R31/028 ,  G01R31/42 ,  H02M1/126 ,  H02M5/4505 ,  H02M5/451 ,  H02M5/458 ,  H02M5/4585 ,  H02M7/525 ,  H02M7/539

Abstract: Power converters and control techniques are presented in which capacitor degradation is detected according to negative sequence current by computing an uncompensated negative sequence current and a negative sequence voltage, compensating the negative sequence current based on the negative sequence voltage, comparing the compensated or uncompensated negative sequence current with an automatically calculated threshold and selectively identifying suspected degradation of one or more capacitors if the compensated negative sequence current exceeds the threshold value. The method can be used for power converters, control devices or protection relays for shunt capacitors or filters used in power systems.

Abstract translation: 提出了功率转换器和控制技术，其中通过计算未补偿的负序电流和负序电压根据负序电流检测电容器劣化，基于负序电压补偿负序电流，比较补偿或未补偿的负序 电流具有自动计算的阈值，并且如果补偿的负序电流超过阈值，则选择性地识别一个或多个电容器的可疑劣化。 该方法可用于电力系统中使用的电源转换器，控制装置或分流电容器或滤波器的保护继电器。