Method and device for sensorless vector control for ac motor
    21.
    发明申请
    Method and device for sensorless vector control for ac motor 有权
    交流电机无传感器矢量控制的方法和装置

    公开(公告)号:US20070018606A1

    公开(公告)日:2007-01-25

    申请号:US10548671

    申请日:2004-03-08

    IPC分类号: H02P27/04

    摘要: To provided a control method and a controller for an a.c. motor without using a speed sensor in which the speed estimated value or the magnetic flux estimated value of an all-dimensional magnetic flux speed observer can be made to correspond to that of an actual a.c. motor. A controller for an a.c. motor includes a vector control and calculating circuit (7) for controlling and calculating a vector from an exciting current command calculated in an exciting current command calculating circuit (5), a torque current command calculated in a torque current command calculating circuit (6), a coordinate transformed current detected value obtained in a coordinate transformation circuit (4), a speed estimated value and a magnetic flux phase estimated value and outputting an output voltage command, a switching pattern generating circuit (8) for generating a signal for PWM driving a power converter (1) from the output voltage command and an all-dimensional magnetic flux speed observer (9) for estimating the speed estimated value and the magnetic flux phase estimated value from the output voltage command and the coordinate transformed current detected value. In the controller for the a.c. motor, a coefficient correcting circuit 10 is provided for correcting the coefficient of a determinant used in the all-dimensional magnetic flux speed observer (9) in accordance with a magnetic flux command.

    摘要翻译: 提供一种控制方法和控制器。 电动机不使用速度传感器,其中可以使全维磁通速度观测器的速度估计值或磁通估计值与实际交流传感器的速度传感器相对应。 发动机。 a.c.的控制器 电动机包括用于根据在励磁电流指令计算电路(5)中计算出的励磁电流指令来控制和计算矢量的矢量控制和计算电路(7),在转矩电流指令计算电路(6)中计算的转矩电流指令, 在坐标变换电路(4)中获得的坐标变换的电流检测值,速度估计值和磁通量相位估计值,并输出输出电压指令;用于产生PWM驱动信号的开关模式产生电路(8) 功率转换器(1)和用于根据输出电压指令和坐标变换电流检测值估计速度估计值和磁通量相位估计值的全维磁通速度观测器(9)。 在控制器中的a.c. 电动机,提供系数校正电路10,用于根据磁通量指令校正全维磁通速度观测器(9)中使用的行列式的系数。