公开(公告)号：US20150091582A1

公开(公告)日：2015-04-02

申请号：US14043065

申请日：2013-10-01

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Lixiang Wei ,  Jiangang Hu ,  Jeffrey D. McGuire

IPC: G01R31/02

CPC classification number: G01R31/025 ,  G01R31/42

Abstract: A HRG ground fault detector and method for detecting a ground fault in a High Resistance Ground (HRG) system are provided. The HRG ground fault detector in one example embodiment includes a first input A coupled to a first phase PHA of the HRG system, a second input B coupled to a second phase PHB, and a third input C coupled to a third phase PHC, with the HRG ground fault detector generating a simulated neutral voltage VN′ from the first phase PHA, the second phase PHB, and the third phase PHC, wherein the simulated neutral voltage VN′ comprises a zero voltage potential when the first phase PHA, the second phase PHB, and the third phase PHC are equal, comparing the simulated neutral voltage VN′ to a predetermined fault voltage threshold, and detecting a HRG ground fault if the simulated neutral voltage VN′ exceeds the threshold.

Abstract translation: 提供了一种用于检测高阻地（HRG）系统中的接地故障的HRG接地故障检测器和方法。 一个示例性实施例中的HRG接地故障检测器包括耦合到HRG系统的第一相PHA的第一输入A，耦合到第二相PHB的第二输入B和耦合到第三相PHC的第三输入C， HRG接地故障检测器从第一相位PHA，第二相位PHB和第三相位PHC产生模拟中性点电压VN'，其中模拟中性点电压VN'包括当第一相位PHA，第二相位PHB ，并且第三相PHC相等，将模拟中性点电压VN'与预定故障电压阈值进行比较，并且如果模拟中性点电压VN'超过阈值则检测HRG接地故障。

公开(公告)号：US20140253055A1

公开(公告)日：2014-09-11

申请号：US14285497

申请日：2014-05-22

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Lixiang Wei ,  Russel J. Kerkman ,  Richard A. Lukaszewski ,  Haihui Lu ,  Zhenhuan Yuan

IPC: H02M7/537 ,  H02P9/00

CPC classification number: H02M7/537 ,  G01B3/52 ,  G05F1/67 ,  H02M1/32 ,  H02P9/007

Abstract: The present techniques include methods and systems for operating converter to maintain a lifespan of the converter. In some embodiments, the operating frequency of the converter may be increased such that stress may be reduced on the bond wires of the converter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the converter operating in a maximum power point tracking (MPPT) mode and determining whether the MPPT operation results in aging the converter to a point which reduces the converter lifespan below a desired lifespan. If the MPPT operation reduces the converter lifespan below the desired lifespan, the frequency of the converter may be increased such that the converter may be controlled to operate at a percentage of MPPT. Thus, in some embodiments, power output may be optimized with respect to maintaining a desired lifespan of the converter.

Abstract translation: 本技术包括用于操作转换器以保持转换器寿命的方法和系统。 在一些实施例中，可以增加转换器的工作频率，使得可以在转换器的接合线上减小应力。 更具体地，实施例涉及为以最大功率点跟踪（MPPT）模式操作的转换器的某些操作条件计算老化参数，并且确定MPPT操作是否导致转换器老化到将转换器寿命降低到期望寿命以下的点 。 如果MPPT操作将转换器寿命降低到期望的寿命以下，则可以增加转换器的频率，使得可以将转换器控制为以MPPT的百分比进行操作。 因此，在一些实施例中，可以相对于维持转换器的期望寿命来优化功率输出。

公开(公告)号：US20140132295A1

公开(公告)日：2014-05-15

申请号：US14159258

申请日：2014-01-20

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Yuan Xiao ,  Lixiang Wei ,  Doyle F. Busse

IPC: G01R31/28 ,  H02M1/42

CPC classification number: G01R31/2843 ,  G01R31/42 ,  H02H7/0811 ,  H02H7/1203 ,  H02H7/16 ,  H02J3/1821 ,  H02J3/26 ,  H02M1/42 ,  H02M5/458 ,  H02P29/0241 ,  Y02E40/30 ,  Y02E40/50

Abstract: The present techniques include methods and systems for detecting a failure in a capacitor bank of an electrical drive system. Embodiments include using discharge resistors to discharge capacitors in the capacitor bank, forming a neutral node of the capacitor bank. In different capacitor configurations, the neutral node is measured, and the voltage is analyzed to determine whether a capacitor bank unbalance has occurred. In some embodiments, the node is a neutral-to-neutral node between the discharged side of the discharge resistors and a neutral side of the capacitor bank, or between the discharged side of the discharge resistors and a discharged side of a second set of discharge resistors. In some embodiments, the node is a neutral-to-ground node between the discharged side of the discharge resistors and a ground potential.

Abstract translation: 本技术包括用于检测电驱动系统的电容器组中的故障的方法和系统。 实施例包括使用放电电阻器对电容器组中的电容器进行放电，形成电容器组的中性点。 在不同的电容器配置中，测量中性点，并分析电压以确定电容器组是否发生不平衡。 在一些实施例中，节点是放电电阻器的放电侧和电容器组的中性侧之间或放电电阻器的放电侧和第二组放电的放电侧之间的中性点至中性节点 电阻 在一些实施例中，节点是放电电阻器的放电侧和接地电位之间的中性点对地节点。