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    • 1. 发明授权
    • Method and compensation modulator for dynamically controlling induction machine regenerating energy flow and direct current bus voltage for an adjustable frequency drive system
    • 用于动态控制感应电机再生能量流和用于变频驱动系统的直流总线电压的方法和补偿调制器
    • US06768284B2
    • 2004-07-27
    • US10260917
    • 2002-09-30
    • Kevin LeeScott K. BeckerKevin J. Schmidt
    • Kevin LeeScott K. BeckerKevin J. Schmidt
    • H02D540
    • H02M7/797H02P21/36
    • A method for dynamically controlling regenerating energy flow and direct current bus voltage for an adjustable frequency drive system includes sensing a direct current voltage of a direct current bus; and sensing a plurality of alternating currents at outputs of an inverter. The sensed alternating currents are transformed to a stationary current vector. Voltage and frequency values are converted to a stationary voltage vector and an angle. The angle and the stationary current vector are transformed to a rotating current vector including torque and flux producing current components. An induction machine generating mode is determined when the torque producing current component reverses polarity. The voltage and frequency values limit the direct current voltage of the direct current bus at a predetermined threshold responsive to the generating mode. The stationary voltage vector and the angle are converted to pulse width modulated control inputs of the inverter.
    • 用于动态地控制可变频驱动系统的再生能量流和直流母线电压的方法包括感测直流母线的直流电压; 并且在逆变器的输出处感测多个交流电流。 所感测的交流电流被转换成固定的电流矢量。 电压和频率值被转换成一个固定的电压矢量和一个角度。 将角度和固定电流矢量转换成包括产生电流分量的转矩和磁通的旋转电流矢量。 当转矩产生电流分量反转极性时,确定感应电机产生模式。 响应于生成模式,电压和频率值将直流总线的直流电压限制在预定阈值。 将稳定电压矢量和角度转换为变频器的脉宽调制控制输入。
    • 9. 发明授权
    • System and method for fast start-up of an induction motor
    • 感应电动机快速启动的系统和方法
    • US08421397B2
    • 2013-04-16
    • US13083849
    • 2011-04-11
    • Anbo YuLei ZhangKevin Lee
    • Anbo YuLei ZhangKevin Lee
    • H02P1/26
    • H02P1/28H02P29/032
    • A system for controlling operation of a motor drive during fast start-up of an induction motor is disclosed. The system includes an AC motor drive having a PWM inverter and a control system to generate a command signal to cause the PWM inverter to control an output of the AC motor drive. The control system includes a start-up modulator that is selectively operable during start-up acceleration of the AC motor, the start-up modulator programmed to determine a motor current applied to the AC motor and a voltage of a DC bus, generate a first frequency offset that causes a frequency reference of the command signal to be decreased when the motor current is greater than a reference current threshold, and generate a second frequency offset that causes the frequency reference of the command signal to be increased when the DC bus voltage is greater than a reference voltage threshold.
    • 公开了一种用于在感应电动机的快速启动期间控制电动机驱动器的操作的系统。 该系统包括具有PWM逆变器的AC电动机驱动器和用于产生指令信号以使PWM逆变器控制AC电动机驱动器的输出的控制系统。 控制系统包括启动调制器,其可在AC电动机的启动加速期间选择性地工作,所述启动调制器被编程以确定施加到AC电动机的电动机电流和DC总线的电压,产生第一 当电动机电流大于参考电流阈值时,导致指令信号的频率参考值减小的频率偏移,并且产生第二频率偏移,当DC总线电压为DC时,使得命令信号的频率参考值增加 大于参考电压阈值。