公开(公告)号：US20180145578A1

公开(公告)日：2018-05-24

申请号：US15876812

申请日：2018-01-22

Applicant: Rockwell Automation Technologies, Inc.

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

IPC: H02M1/10 ,  H02M7/49 ,  H02M5/458 ,  H02M1/32 ,  H02M1/00

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 first and second 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.

公开(公告)号：US20180083514A1

公开(公告)日：2018-03-22

申请号：US15293899

申请日：2016-10-14

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Yuan Xiao ,  Navid Reza Zargari ,  Lixiang Wei ,  James A. Ulrich

IPC: H02K11/33 ,  H02K11/22 ,  H02P27/06

CPC classification number: H02K11/33 ,  H02K11/022

Abstract: The disclosed apparatus provides a simple and low cost solution of reducing voltage stress on AC motors and cables in VFD fed motor systems without connecting apparatus to live circuits. Disclosed examples include apparatus to couple a motor drive to a motor, including a cable with a first end coupled with an output of a motor drive, a second end coupled with a motor, a plurality of conductors to convey an output signal of the motor drive between the first and second ends to drive the motor, and a plurality of shields, with a conductive junction to couple tap points of at least two of the shields together. Resistors can be used to connect the tap points to the conductive junction to provide an impedance in series with the corresponding shield to reduce voltage stress to the motor or the cable. In certain examples, the shields include a semiconductor material to provide an impedance between the first end and the conductive junction to reduce voltage stress to the motor or the cable.

公开(公告)号：US09837924B1

公开(公告)日：2017-12-05

申请号：US15171387

申请日：2016-06-02

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Lixiang Wei ,  Zeljko Radomir Jankovic

IPC: H02M5/44 ,  H02M7/04 ,  H02M1/12 ,  H02M5/458

CPC classification number: H02M7/125 ,  H02M1/126 ,  H02M1/36 ,  H02M5/458 ,  H02M5/4585 ,  H02M7/219

Abstract: Power conversion systems, methods and precharge systems are disclosed to charge a DC bus capacitor, including thyristors and reverse diodes coupled in AC circuit paths between AC input lines and a rectifier, a precharge resistor coupled in one or more of the AC circuit paths, and a controller to turn all the thyristors off to allow the DC bus capacitor to charge through the precharge resistor, and to turn all the thyristors on when the DC bus voltage reaches a non-zero threshold value.

公开(公告)号：US09625519B2

公开(公告)日：2017-04-18

申请号：US14159258

申请日：2014-01-20

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

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

IPC: G01R31/34 ,  H01G2/12 ,  G01R31/28 ,  H02H7/12 ,  H02H7/16 ,  H02J3/18 ,  H02M5/458 ,  H02M1/42 ,  H02P29/024 ,  H02H7/08 ,  G01R31/42 ,  H02J3/26

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.

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：US09590547B2

公开(公告)日：2017-03-07

申请号：US14696648

申请日：2015-04-27

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Haihui Lu ,  Zhenhuan Yuan ,  Lixiang Wei ,  Russel J. Kerkman ,  Richard Lukaszewski ,  Ahmed Mohamed Sayed Anmed

IPC: F03D9/00 ,  H02P9/00 ,  F03D7/02 ,  F03D7/04 ,  H02J3/38 ,  H02P9/10 ,  H02H7/06 ,  H02H7/12 ,  H02P101/15 ,  H02H9/00 ,  H02J3/00

CPC classification number: H02P9/006 ,  F03D7/0224 ,  F03D7/0284 ,  F03D7/0288 ,  F03D7/04 ,  F03D9/255 ,  H02H7/06 ,  H02H7/12 ,  H02H9/002 ,  H02J3/386 ,  H02J2003/001 ,  H02P9/007 ,  H02P9/102 ,  H02P9/48 ,  H02P2101/15 ,  Y02E10/723 ,  Y02E10/763

Abstract: A double fed induction generator (DFIG) converter, methods and computer readable mediums are presented in which rotor side current spikes are attenuated by selectively activating at least one series damping circuit to conduct current through a series damping circuit resistance coupled in series between one or more DFIG rotor leads and a grid side converter in response to a grid fault occurrence or a grid fault clearance, and selectively bypassing the series damping circuit resistance after activating the series damping circuit.

Abstract translation: 提出了一种双馈感应发电机（DFIG）转换器，方法和计算机可读介质，其中通过选择性地激活至少一个串联阻尼电路来使转子侧电流尖峰衰减，以将电流传导通过串联耦合在一个或多个 DFIG转子引线和电网侧转换器响应于电网故障发生或电网故障间隙，并且在启动串联阻尼电路之后选择性地旁路串联阻尼电路电阻。

公开(公告)号：US20160013715A1

公开(公告)日：2016-01-14

申请号：US14566752

申请日：2014-12-11

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Yogesh P. Patel ,  Lixiang Wei

IPC: H02M1/12 ,  H02M7/04

CPC classification number: H02M1/126 ,  H02M1/12 ,  H02M7/04

Abstract: Control apparatus, techniques and computer readable mediums are presented to mitigate LCL filter resonance issue for voltage source converters. Two level voltage source converter with and without passive damping of LCL filter are selected for the comparative study. Control algorithms are presented to estimate the source impedance based on variable carrier PWM. Estimated source impedance is used to tune the control of the VSC to avoid the resonance of LCL filter has been presented. In situations in which LCL resonance cannot be avoided by tuning the control parameters, energy efficient techniques are disclosed to provide selective passive damping to facilitate continued power conversion system operation without significant adverse impact on system performance.

Abstract translation: 提出了控制装置，技术和计算机可读介质以减轻电压源转换器的LCL滤波器共振问题。 选择具有和不具有LCL滤波器的无源阻尼的两级电压源转换器进行比较研究。 提出了控制算法来估计基于可变载波PWM的源阻抗。 估计源阻抗用于调节VSC的控制，以避免LCL滤波器的共振已经呈现。 在通过调节控制参数不能避免LCL共振的情况下，公开了能量效率技术来提供选择性的被动阻尼以便于连续的功率转换系统运行，而不会对系统性能造成显着的不利影响。

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。

公开(公告)号：US20140265976A1

公开(公告)日：2014-09-18

申请号：US13803472

申请日：2013-03-14

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Bruce William Weiss ,  Robert Michael Michalski ,  Lixiang Wei ,  Garron Koch Morris ,  Brian Patrick Brown

IPC: G05B23/02 ,  G05B11/01 ,  H02P31/00

CPC classification number: G05B23/0224 ,  G05B11/01 ,  G05D23/1917 ,  H02P31/00

Abstract: An electric motor drive system includes a fan configured to cool power electronic components of the electric motor drive system. The electric motor drive system also includes a temperature sensor disposed proximate an air inlet of the fan and configured to sense an ambient temperature of air entering the air inlet. In addition, the electric motor drive system includes a processor communicatively coupled to the temperature sensor and configured to determine at least one of a drive prognostic and a derating requirement based on the sensed ambient temperature.

Abstract translation: 电动机驱动系统包括：风扇，被配置为冷却所述电动机驱动系统的电力部件。 电动机驱动系统还包括温度传感器，该温度传感器设置在风扇的空气入口附近，并被配置为感测进入空气入口的空气的环境温度。 此外，电动机驱动系统包括通信地耦合到温度传感器并且被配置为基于感测到的环境温度来确定驱动器预测和降额要求中的至少一个的处理器。

公开(公告)号：US11366147B2

公开(公告)日：2022-06-21

申请号：US17010624

申请日：2020-09-02

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Lixiang Wei ,  Bing Li ,  Jacob Lamb

IPC: H02P21/14 ,  G01R27/08 ,  H02P23/14 ,  H02P27/06

Abstract: For motor stator resistance calculation, a method estimates an output voltage using a Direct Current (DC) bus voltage and a duty ratio for a motor drive at a first switching frequency and at least one second switching frequency. The method measures an output current at the first switching frequency and the at least one second switching frequency. The method calculates a first stator resistance for the first switching frequency and at least one second stator resistance for the at least one second switching frequency. The method estimates a stator resistance at a DC condition based on the first stator resistance and the at least one second stator resistance. The method sets a dynamic compensation based on a stator resistance error between the first switching frequency and the at least one second switching frequency.