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    SYSTEM FOR OPERATING A THREE-PHASE VARIABLE FREQUENCY DRIVE FROM AN UNBALANCED THREE-PHASE OR SINGLE-PHASE AC SOURCE
    1.
    发明申请
    SYSTEM FOR OPERATING A THREE-PHASE VARIABLE FREQUENCY DRIVE FROM AN UNBALANCED THREE-PHASE OR SINGLE-PHASE AC SOURCE 有权
    用于从不平衡三相或单相交流源运行三相可变频率驱动器的系统

    公开(公告)号：US20150311853A1

    公开(公告)日：2015-10-29

    申请号：US14259385

    申请日：2014-04-23

    申请人： Yaskawa America, Inc.

    发明人： Mahesh M. Swamy ,  Anupama Balakrishnan ,  Joshua David Collins

    IPC分类号： H02P27/08

    CPC分类号： H02P27/047 ,  A61B17/1626 ,  B26B19/00 ,  B26B19/06 ,  B26B19/38 ,  H02M1/15 ,  H02M5/458 ,  H02M7/53875

    摘要： A variable frequency motor drive comprises a converter including a rectifier having an input for connection to an AC power source and converting the AC power to DC power. A DC bus is connected to the rectifier circuit. At least one bus capacitor is across the DC bus. An inverter receives DC power from the DC bus and converts the DC power to AC power to drive a motor. A controller is operatively connected to the converter. The controller comprises a speed control controlling the inverter responsive to a speed command to maintain a desired motor speed. A speed foldback control measures DC bus ripple voltage and regulates the speed command responsive to the measured DC bus ripple voltage.

    摘要翻译： 变频电动机驱动器包括转换器，其包括具有用于连接到AC电源的输入并将AC电力转换为DC电力的整流器。 直流总线连接到整流电路。 直流总线上至少有一个总线电容。 逆变器从直流总线接收直流电，并将直流电转换成交流电，驱动电动机。 控制器可操作地连接到转换器。 控制器包括响应于速度命令控制逆变器以维持期望的电动机速度的速度控制。 速度折返控制测量DC总线纹波电压，并根据测量的直流总线纹波电压调节速度指令。