公开(公告)号：US08704481B2

公开(公告)日：2014-04-22

申请号：US13014640

申请日：2011-01-26

申请人： Carlos Rodriguez Valdez ,  Rangarajan Tallam ,  Russel Kerkman

发明人： Carlos Rodriguez Valdez ,  Rangarajan Tallam ,  Russel Kerkman

IPC分类号： H02P27/04

CPC分类号： H02H7/10 ,  H02H3/165 ,  H02M1/126 ,  H02M2001/123

摘要： The present invention relates generally to systems and methods for detecting ground faults (i.e., line-to-ground faults) in motor drive systems. In particular, the embodiments described herein include a common mode choke of a motor drive system having additional (i.e., secondary) turns wound around a core of the common mode choke. These secondary turns are in addition to and separate from a plurality of sets of primary turns wound around the core of the common mode choke, each set of primary turns corresponding to a phase of AC power to which the common mode choke is directly coupled. The secondary turns terminate in series with a burden resistor. Ground faults may be detected by monitoring the voltage across the burden resistor. More specifically, the embodiments described herein include a controller including program instructions for receiving signals indicative of the voltage across the burden resistor, and for monitoring the voltage across the burden resistor to determine when ground faults occur in the motor drive system.

摘要翻译： 本发明一般涉及用于检测电机驱动系统中的接地故障（即，线对地故障）的系统和方法。 特别地，这里描述的实施例包括电动机驱动系统的共模扼流圈，其具有缠绕在共模扼流圈的芯上的附加（即次级）匝。 这些次级绕组是与共模扼流圈的磁芯缠绕的多组初级绕组相加和分开的，每组初级线圈对应于共模扼流圈直接耦合到的交流电源的相位。 次级绕组与负载电阻串联终止。 可以通过监控负载电阻两端的电压来检测接地故障。 更具体地，本文描述的实施例包括控制器，其包括用于接收指示负载电阻器两端的电压的信号的程序指令，以及用于监视负载电阻器两端的电压以确定何时在电动机驱动系统中发生接地故障。

公开(公告)号：US07738267B1

公开(公告)日：2010-06-15

申请号：US12394613

申请日：2009-02-27

申请人： Rangarajan Tallam ,  Russel Kerkman ,  David Leggate

发明人： Rangarajan Tallam ,  Russel Kerkman ,  David Leggate

IPC分类号： H02J3/36

CPC分类号： H02M1/44 ,  H02M7/5387 ,  H02M2001/123 ,  H02M2007/53876

摘要： Control systems, methods and power conversion systems are presented for controlling common mode voltages in AC motor loads driven by inverter PWM control using switching sequences with only active vectors where a first vector of each switching sequence differs by one phase switching state from a last vector of a switching sequence of an adjacent sector, along with enhanced deadtime compensation and reflected wave reduction techniques in providing pulse width modulated switching signals to a switching inverter.

摘要翻译： 提出了控制系统，方法和电力转换系统，用于控制由逆变器PWM控制驱动的交流电动机负载中的共模电压，其中仅使用具有每个开关序列的第一向量与第一个矢量 相邻扇区的切换序列，以及增强的死区时间补偿以及向切换逆变器提供脉宽调制切换信号的反射波减少技术。

公开(公告)号：US09294005B2

公开(公告)日：2016-03-22

申请号：US14042753

申请日：2013-10-01

申请人： Rangarajan Tallam ,  Russel Kerkman

发明人： Rangarajan Tallam ,  Russel Kerkman

IPC分类号： H02M5/45 ,  H02M7/12 ,  G01R31/02 ,  H02M5/452 ,  H02M5/458 ,  G01R31/42

CPC分类号： H02M7/125 ,  G01R31/028 ,  G01R31/42 ,  H02M1/126 ,  H02M5/452 ,  H02M5/4585

摘要： Methods and systems are disclosed for detecting capacitor degradation in an input filter of an active front end power conversion system in which voltage and current sensing is performed to determine sequence component impedance asymmetry to detect filter capacitor degradation according to the value of an off-axis admittance matrix component for Delta or Y-connected filter capacitor banks without sensitivity to voltage unbalance, and with the capability to identify particular degraded capacitor locations based on individual impedance values.

摘要翻译： 公开了用于检测有源前端功率转换系统的输入滤波器中的电容器劣化的方法和系统，其中执行电压和电流感测以确定顺序分量阻抗不对称性，以根据离轴导纳的值来检测滤波电容器劣化 用于Delta或Y连接的滤波电容器组的矩阵分量，不对电压不平衡敏感，并且具有基于各个阻抗值识别特定劣化电容器位置的能力。

公开(公告)号：US20150092460A1

公开(公告)日：2015-04-02

申请号：US14042753

申请日：2013-10-01

申请人： Rangarajan Tallam ,  Russel Kerkman

发明人： Rangarajan Tallam ,  Russel Kerkman

IPC分类号： H02M7/12 ,  G01R31/02 ,  G01R27/00

CPC分类号： H02M7/125 ,  G01R31/028 ,  G01R31/42 ,  H02M1/126 ,  H02M5/452 ,  H02M5/4585

摘要： Methods and systems are disclosed for detecting capacitor degradation in an input filter of an active front end power conversion system in which voltage and current sensing is performed to determine sequence component impedance asymmetry to detect filter capacitor degradation according to the value of an off-axis admittance matrix component for Delta or Y-connected filter capacitor banks without sensitivity to voltage unbalance, and with the capability to identify particular degraded capacitor locations based on individual impedance values.

摘要翻译： 公开了用于检测有源前端功率转换系统的输入滤波器中的电容器劣化的方法和系统，其中执行电压和电流感测以确定顺序分量阻抗不对称性，以根据离轴导纳的值来检测滤波电容器劣化 用于Delta或Y连接的滤波电容器组的矩阵分量，不对电压不平衡敏感，并且具有基于各个阻抗值识别特定劣化电容器位置的能力。

公开(公告)号：US08107267B2

公开(公告)日：2012-01-31

申请号：US12429309

申请日：2009-04-24

申请人： Rangarajan Tallam ,  Russel Kerkman ,  David Leggate

发明人： Rangarajan Tallam ,  Russel Kerkman ,  David Leggate

IPC分类号： H02M5/45

CPC分类号： H02M1/44 ,  H02M7/5387 ,  H02M2001/123 ,  H02M2007/53876

摘要： Control systems, methods and fully regenerative power conversion systems are presented for mitigating common mode voltages in AC loads by employing inverter and/or active rectifier PWM control using switching sequences with only active vectors where a first vector of each switching sequence differs by one phase switching state from a last vector of a switching sequence of an adjacent sector.

摘要翻译： 提出了控制系统，方法和全再生电力转换系统，用于通过采用逆变器和/或有源整流器PWM控制来减轻交流负载中的共模电压，该开关序列仅使用具有每个开关序列的第一向量不同于一相开关的有源矢量 状态从相邻扇区的切换序列的最后向量。

公开(公告)号：US20120187883A1

公开(公告)日：2012-07-26

申请号：US13014640

申请日：2011-01-26

申请人： Carlos Rodriguez Valdez ,  Rangarajan Tallam ,  Russel Kerkman

发明人： Carlos Rodriguez Valdez ,  Rangarajan Tallam ,  Russel Kerkman

IPC分类号： H02H3/16

CPC分类号： H02H7/10 ,  H02H3/165 ,  H02M1/126 ,  H02M2001/123

摘要： The present invention relates generally to systems and methods for detecting ground faults (i.e., line-to-ground faults) in motor drive systems. In particular, the embodiments described herein include a common mode choke of a motor drive system having additional (i.e., secondary) turns wound around a core of the common mode choke. These secondary turns are in addition to and separate from a plurality of sets of primary turns wound around the core of the common mode choke, each set of primary turns corresponding to a phase of AC power to which the common mode choke is directly coupled. The secondary turns terminate in series with a burden resistor. Ground faults may be detected by monitoring the voltage across the burden resistor. More specifically, the embodiments described herein include a controller including program instructions for receiving signals indicative of the voltage across the burden resistor, and for monitoring the voltage across the burden resistor to determine when ground faults occur in the motor drive system.

摘要翻译： 本发明一般涉及用于检测电机驱动系统中的接地故障（即，线对地故障）的系统和方法。 特别地，这里描述的实施例包括电动机驱动系统的共模扼流圈，其具有缠绕在共模扼流圈的芯上的附加（即次级）匝。 这些次级绕组是与共模扼流圈的磁芯缠绕的多组初级绕组相加和分开的，每组初级线圈对应于共模扼流圈直接耦合到的交流电源的相位。 次级绕组与负载电阻串联终止。 可以通过监控负载电阻两端的电压来检测接地故障。 更具体地，本文描述的实施例包括控制器，其包括用于接收指示负载电阻器两端的电压的信号的程序指令，以及用于监视负载电阻器两端的电压以确定何时在电动机驱动系统中发生接地故障。

公开(公告)号：US20100172162A1

公开(公告)日：2010-07-08

申请号：US12429309

申请日：2009-04-24

申请人： Rangarajan Tallam ,  Russel Kerkman ,  David Leggate

发明人： Rangarajan Tallam ,  Russel Kerkman ,  David Leggate

IPC分类号： H02M5/45

CPC分类号： H02M1/44 ,  H02M7/5387 ,  H02M2001/123 ,  H02M2007/53876

摘要： Control systems, methods and fully regenerative power conversion systems are presented for mitigating common mode voltages in AC loads by employing inverter and/or active rectifier PWM control using switching sequences with only active vectors where a first vector of each switching sequence differs by one phase switching state from a last vector of a switching sequence of an adjacent sector.

摘要翻译： 提出了控制系统，方法和全再生电力转换系统，用于通过采用逆变器和/或有源整流器PWM控制来减轻交流负载中的共模电压，该开关序列仅使用具有每个开关序列的第一向量不同于一相开关的有源矢量 状态从相邻扇区的切换序列的最后向量。

公开(公告)号：US20100172161A1

公开(公告)日：2010-07-08

申请号：US12394613

申请日：2009-02-27

申请人： Rangarajan Tallam ,  Russel Kerkman ,  David Leggate

发明人： Rangarajan Tallam ,  Russel Kerkman ,  David Leggate

IPC分类号： H02M5/45

CPC分类号： H02M1/44 ,  H02M7/5387 ,  H02M2001/123 ,  H02M2007/53876

摘要： Control systems, methods and power conversion systems are presented for controlling common mode voltages in AC motor loads driven by inverter PWM control using switching sequences with only active vectors where a first vector of each switching sequence differs by one phase switching state from a last vector of a switching sequence of an adjacent sector, along with enhanced deadtime compensation and reflected wave reduction techniques in providing pulse width modulated switching signals to a switching inverter.

摘要翻译： 提出了控制系统，方法和电力转换系统，用于控制由逆变器PWM控制驱动的交流电动机负载中的共模电压，其中仅使用具有每个开关序列的第一向量与第一个矢量 相邻扇区的切换序列，以及增强的死区时间补偿以及向切换逆变器提供脉宽调制切换信号的反射波减少技术。

公开(公告)号：US20090296289A1

公开(公告)日：2009-12-03

申请号：US12131195

申请日：2008-06-02

申请人： Carlos Rodriguez Valdez ,  Russel Kerkman ,  David Dahl ,  Jeffrey McGuire ,  Nickolay Guskov

发明人： Carlos Rodriguez Valdez ,  Russel Kerkman ,  David Dahl ,  Jeffrey McGuire ,  Nickolay Guskov

IPC分类号： H02H9/08

CPC分类号： H02H3/17 ,  H02H3/165 ,  H02H7/0833

摘要： A method and apparatus for identifying a ground fault in a motor drive system that includes at least one three phase power conditioner that is linked to three phase supply lines and to positive and negative DC buses, the method comprising the steps of controlling the power conditioner at an operating frequency to convert power, while controlling the power conditioner to convert power, controlling the power conditioner to apply a common mode signal on each of the three phase supply lines where the common mode signal has a frequency that is different than the operating frequency, sensing the common mode signal on at least one of the three phase supply lines and when the common mode signal on the at least one of the three phase supply lines is greater than a threshold level, indicating that a ground fault has occurred.

摘要翻译： 一种用于识别电动机驱动系统中的接地故障的方法和装置，该方法和装置包括至少一个三相电力调节器，其连接到三相电源线以及正和负DC总线，该方法包括以下步骤： 控制功率调节器转换功率的工作频率，控制功率调节器以在共模信号具有不同于工作频率的频率的三相电源线中的每一个上施加共模信号， 感测三相电源线中的至少一个上的共模信号，并且当三相电源线中的至少一个电源线上的共模信号大于阈值电平时，指示发生了接地故障。

公开(公告)号：US08519655B2

公开(公告)日：2013-08-27

申请号：US13482658

申请日：2012-05-29

申请人： Lixiang Wei ,  Richard A. Lukaszewski ,  Russel Kerkman ,  Brian J. Seibel

发明人： Lixiang Wei ,  Richard A. Lukaszewski ,  Russel Kerkman ,  Brian J. Seibel

IPC分类号： H02P27/00

CPC分类号： H02M1/083 ,  B60L2210/20 ,  H02M5/4585 ,  H02M2007/2195 ,  H02P23/06 ,  H02P25/105 ,  H02P27/08 ,  Y02T10/642 ,  Y02T10/725

摘要： Embodiments of the present invention provide novel techniques for using a switched converter to provide for three-phase alternating current (AC) rectification, regenerative braking, and direct current (DC) voltage boosting. In particular, one of the three legs of the switched converter is controlled with a set of pulse width modulation (PWM) control signals so that the input AC phase having the highest voltage is rectified and one of the switches in the two other legs is turned on to allow for added voltage. This switching activity allows for voltage from multiple AC line mains to be combined, resulting in an overall boost of the DC voltage of the rectifier. The DC voltage boost can then be applied to the common DC bus in order to ameliorate voltage sags, help with motor starts, and increase the ride-through capability of the motor.

摘要翻译： 本发明的实施例提供了使用开关转换器来提供三相交流（AC）整流，再生制动和直流（DC）升压）的新技术。 特别地，开关转换器的三条腿之一由一组脉冲宽度调制（PWM）控制信号控制，使得具有最高电压的输入AC相被整流，并且另外两条腿中的一个开关被转动 允许增加电压。 该开关活动允许来自多个AC线路电源的电压被组合，导致整流器的直流电压的总体升高。 直流电压升压可以应用于公共直流总线，以改善电压下降，有助于电机启动，并增加电机的穿越能力。