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    Capacitor charge balancing technique for a three-level PWM power converter
    5.
    发明授权
    Capacitor charge balancing technique for a three-level PWM power converter 失效
    三电平PWM功率转换器的电容电荷平衡技术

    公开(公告)号：US06842354B1

    公开(公告)日：2005-01-11

    申请号：US10637281

    申请日：2003-08-08

    申请人： Rangarajan M. Tallam ,  Rajendra Naik

    发明人： Rangarajan M. Tallam ,  Rajendra Naik

    IPC分类号： H02M7/48 ,  H02M7/483 ,  H02M7/487 ,  H02M7/5387

    CPC分类号： H02M7/483 ,  H02M7/487

    摘要： A power converter includes a DC to AC inverter that is connected to a neutral node formed between first and second capacitors connected across two DC supply lines. The inverter is operated to selectively couple the DC supply lines and the neutral node to an output terminal thereby producing an alternating voltage waveform formed by a sequence of output pulses having positive, zero and negative voltage levels. To compensate for a voltage imbalance across the capacitors, an imbalance compensation coefficient is derived from the difference in voltages across the first and second capacitors and from the direction of current between the neutral node and the inverter. The imbalance compensation coefficient is employed to adjust the width of the output pulses so as to charge and discharge the capacitors to correct the imbalance.

    摘要翻译： 电力转换器包括连接到跨过两个直流电源线的第一和第二电容器之间形成的中性点的DC到AC逆变器。 操作逆变器以选择性地将直流电源线和中性点连接到输出端，由此产生由正，负和负电压电平的一系列输出脉冲形成的交流电压波形。 为了补偿电容器两端的电压不平衡，从第一和第二电容器两端的电压差以及中性点与逆变器之间的电流方向导出不平衡补偿系数。 采用不平衡补偿系数来调整输出脉冲的宽度，以便对电容器进行充放电以纠正不平衡。

    Method and apparatus to reduce common mode voltages applied to a load by a drive
    6.
    发明授权
    Method and apparatus to reduce common mode voltages applied to a load by a drive 有权
    降低由驱动器施加到负载的共模电压的方法和装置

    公开(公告)号：US07215559B2

    公开(公告)日：2007-05-08

    申请号：US10952012

    申请日：2004-09-28

    申请人： Thomas Arthur Nondahl ,  Rajendra Naik ,  Rangarajan Madapusi Tallam

    发明人： Thomas Arthur Nondahl ,  Rajendra Naik ,  Rangarajan Madapusi Tallam

    IPC分类号： H02M3/24 ,  H02M5/42

    CPC分类号： H02M5/458 ,  H02M7/53873 ,  H02M2001/123

    摘要： A method and apparatus for reducing common mode voltage applied to a load by a drive, the drive including a rectifier linked between three AC supply lines and positive and negative DC buses that converts AC supply voltage to DC voltage across the DC buses and an inverter linked between the DC buses and a load, the rectifier providing a DC input voltage to the inverter wherein, during normal operation, the inverter is capable of generating maximum inverter output voltages given a specific DC bus voltage, the method comprising the steps of controlling the inverter to supply output voltages to the load where the output voltage are substantially free of common mode voltage and such that the maximum inverter output voltage is less than the maximum inverter output voltage during normal inverter operation and given a specific DC bus voltage and controlling the rectifier to convert the supply voltage to DC voltage across the DC buses and so that the DC bus voltage is boosted to a level more than greater than the peak three phase AC input voltage that will be least substantially compensate for the drop in maximum inverter output voltage.

    摘要翻译： 一种用于降低由驱动器施加到负载的共模电压的方法和装置，所述驱动器包括连接在三个AC电源线之间的整流器，以及将AC电源电压转换为DC总线上的DC电压的正和负DC总线以及连接的逆变器 在直流母线和负载之间，整流器向逆变器提供直流输入电压，其中在正常操作期间，逆变器能够产生给定特定直流母线电压的最大逆变器输出电压，该方法包括以下步骤：控制逆变器 向输出电压基本上没有共模电压的负载提供输出电压，并且使得最大逆变器输出电压小于正常逆变器操作期间的最大逆变器输出电压，并给出特定的直流母线电压并控制整流器 将电源电压转换为直流母线上的直流电压，使直流母线电压提升到更高的水平 大于峰值三相交流输入电压，这将最不利地补偿最大逆变器输出电压的下降。

    SYSTEM AND METHOD FOR POWERING A HYBRID ELECTRIC VEHICLE
    7.
    发明申请
    SYSTEM AND METHOD FOR POWERING A HYBRID ELECTRIC VEHICLE 审中-公开
    混合电动汽车动力系统及方法

    公开(公告)号：US20100085787A1

    公开(公告)日：2010-04-08

    申请号：US12245156

    申请日：2008-10-03

    申请人： Ajit Wasant Kane ,  Rajendra Naik

    发明人： Ajit Wasant Kane ,  Rajendra Naik

    IPC分类号： H02M7/68

    CPC分类号： B60K6/365 ,  B60K1/02 ,  B60K6/445 ,  B60K6/485 ,  B60L15/06 ,  B60L2210/20 ,  Y02T10/6226 ,  Y02T10/6239 ,  Y02T10/6269 ,  Y02T10/644 ,  Y02T10/725

    摘要： A drive system including a first bus, a second bus, an AC bus, an energy storage device coupled to the first bus, the energy storage device configured to output a stored DC voltage to the first bus and configured to receive a charging voltage from the first bus, and a power converter electrically coupled between the first bus and the second bus, the power converter configured to convert a DC voltage on the first bus to a DC voltage suitable for the second bus and configured to convert a DC voltage on the second bus to a DC voltage suitable for the first bus and suitable for charging the energy storage device. The system further includes a voltage inverter coupled between the second bus and the AC bus, the voltage inverter configured to invert a DC voltage on the second bus to an AC voltage suitable for the AC bus and configured to invert an AC voltage on the AC bus to a DC voltage suitable for the second bus to supply the DC voltage to the first bus.

    摘要翻译： 一种包括第一总线，第二总线，AC总线，耦合到第一总线的能量存储装置的驱动系统，所述能量存储装置被配置为将存储的DC电压输出到所述第一总线并且被配置为从所述第一总线接收来自所述第一总线的充电电压 第一总线以及电耦合在第一总线和第二总线之间的电力转换器，所述功率转换器被配置为将第一总线上的DC电压转换为适合于第二总线的DC电压，并且被配置为在第二总线上转换DC电压 总线到适合于第一总线的DC电压并且适于对能量存储装置充电。 该系统还包括耦合在第二总线和AC总线之间的电压反相器，电压反相器配置成将第二总线上的直流电压反相到适合于AC总线的AC电压，并且被配置为反转AC总线上的AC电压 到适合于第二总线的DC电压以将DC电压提供给第一总线。

    Method and apparatus to reduce common mode voltages applied to a load by a drive
    10.
    发明申请
    Method and apparatus to reduce common mode voltages applied to a load by a drive 有权
    降低由驱动器施加到负载的共模电压的方法和装置

    公开(公告)号：US20060067092A1

    公开(公告)日：2006-03-30

    申请号：US10952012

    申请日：2004-09-28

    申请人： Thomas Nondahl ,  Rajendra Naik ,  Rangarajan Tallam

    发明人： Thomas Nondahl ,  Rajendra Naik ,  Rangarajan Tallam

    IPC分类号： H02M5/45

    CPC分类号： H02M5/458 ,  H02M7/53873 ,  H02M2001/123

    摘要： The invention includes a method and apparatus for reducing common mode voltage applied to a load by a drive, the drive including a rectifier linked between three AC supply lines and positive and negative DC buses that converts AC supply voltage to DC voltage across the DC buses and an inverter linked between the DC buses and a load, the rectifier providing a DC input voltage to the inverter wherein, during normal operation, the inverter is capable of generating maximum inverter output voltages given a specific DC bus voltage, the method comprising the steps of controlling the inverter to supply output voltages to the load where the output voltages are substantially free of common mode voltage and such that the maximum inverter output voltage is X % less than the maximum inverter output voltage during normal inverter operation and given a specific DC bus voltage and controlling the rectifier to convert the supply voltage to DC voltage across the DC buses and so that the DC bus voltage is boosted to a level more than X % greater than the peak three phase AC input voltage.

    摘要翻译： 本发明包括一种用于降低由驱动器施加到负载的共模电压的方法和装置，所述驱动器包括连接在三个AC电源线之间的整流器以及将AC电源电压转换成DC总线上的DC电压的正和负DC总线，以及 所述逆变器连接在所述DC总线与负载之间，所述整流器向所述逆变器提供DC输入电压，其中在正常操作期间，所述逆变器能够产生给定特定DC总线电压的最大逆变器输出电压，所述方法包括以下步骤： 控制逆变器向输出电压基本上没有共模电压的负载提供输出电压，并使得最大逆变器输出电压比正常逆变器运行期间的最大逆变器输出电压小X％，并给出特定的直流母线电压 并控制整流器将电源电压转换为直流母线上的直流电压，并使直流母线电压i s提升到高于三相交流输入电压峰值的X％以上。