公开(公告)号：US20140225625A1

公开(公告)日：2014-08-14

申请号：US14252556

申请日：2014-04-14

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Lixiang Wei ,  Zhijun Liu ,  Brian Patrick Brown ,  David W. Kirschnik ,  Russ J. Kerkman ,  Richard A. Lukaszewski ,  Gary Skibinski ,  Carlos Daniel Rodriguez-Valdez

IPC: G01R31/02

CPC classification number: G01R31/025 ,  H02H3/16 ,  H02H7/08

Abstract: A method is provided for detection of a ground fault in a high resistance network in a voltage source power conversion circuit comprising a power converter that converts incoming AC power to DC power applied to a DC bus and an inverter that converts DC power from the DC bus to output AC power. The method includes detecting a midpoint-to-ground voltage between a low side of the DC bus and a ground potential and detecting the presence of a ground fault in a high resistance network based upon the detected midpoint-to-ground voltage.

Abstract translation: 提供一种用于检测电压源电力转换电路中的高电阻网络中的接地故障的方法，该电压源电力转换电路包括将输入AC电力转换为施加到DC总线的DC电力的电力转换器和从DC总线转换DC电力的逆变器 输出交流电源。 该方法包括检测DC总线的低侧与地电位之间的中点到地电压，并且基于检测到的中点到地电压来检测高电阻网络中的接地故障的存在。

公开(公告)号：US09612269B2

公开(公告)日：2017-04-04

申请号：US14252556

申请日：2014-04-14

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Lixiang Wei ,  Zhijun Liu ,  Brian Patrick Brown ,  David W. Kirschnik ,  Russ J. Kerkman ,  Richard A. Lukaszewski ,  Gary Skibinski ,  Carlos Daniel Rodriguez-Valdez

IPC: G01R31/02 ,  H02H3/16 ,  H02H7/08

CPC classification number: G01R31/025 ,  H02H3/16 ,  H02H7/08

Abstract: A method is provided for detection of a ground fault in a high resistance network in a voltage source power conversion circuit comprising a power converter that converts incoming AC power to DC power applied to a DC bus and an inverter that converts DC power from the DC bus to output AC power. The method includes detecting a midpoint-to-ground voltage between a low side of the DC bus and a ground potential and detecting the presence of a ground fault in a high resistance network based upon the detected midpoint-to-ground voltage.

公开(公告)号：US20150009726A1

公开(公告)日：2015-01-08

申请号：US14492981

申请日：2014-09-22

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Lixiang Wei ,  David W. Kirschnik ,  Richard A. Lukaszewski ,  Gary L. Skibinski

IPC: G01R31/02 ,  H02M5/458

CPC classification number: G01R31/025 ,  G01R31/42 ,  H02M5/458

Abstract: The present techniques include methods and systems for detecting the grounding condition of an electrical system to automatically determine a suitable electrical drive configuration. The drive includes a test resistor which may be connected or disconnected from the drive to measure different drive voltages. The measured drive voltages are analyzed to determine a type of grounding configuration of the electrical system in which the drive is to be installed. Embodiments also include determining ground resistance condition such as a high resistance ground (HRG) fault or a ground resistance fault when the drive is in operation.

Abstract translation: 本技术包括用于检测电气系统的接地状态以自动确定合适的电气驱动配置的方法和系统。 该驱动器包括可以与驱动器连接或断开的测试电阻，以测量不同的驱动电压。 分析测量的驱动电压以确定要安装驱动器的电气系统的接地配置类型。 实施例还包括当驱动器运行时确定诸如高电阻接地（HRG）故障或接地电阻故障之类的接地电阻状况。