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    • 1. 发明公开
    • Control system for controlling revolution speed of electric motor
    • 控制电动机转速的控制系统
    • EP0306922A2
    • 1989-03-15
    • EP88114617.9
    • 1988-09-07
    • Kabushiki Kaisha Meidensha
    • Nomura, MasakatsuAshikaga, TadashiHori, MichitakaMizuno, TakayukiIchioka, Tadashi
    • G05B13/04
    • G05B13/04G05B13/042H02P21/09H02P2207/01
    • A motor speed control system takes one approach to establish dummy load models having characteristics equivalent to an electric motor to be controlled. One of the dummy load model is established for feedback :controlling the electric motor on the basis of the speed of the dummy model. The dummy model is divided into first and second models. The first model is designed to have equivalent characteristics to output a first motor speed representative data. The current to supply to the first model is so adjusted as to reduce a difference between the motor speed representative data and a desired motor speed data to zero. A frequency signal is added to the current applied to the first model and supplied to the electric motor to drive the latter. The second model receives the frequency signal to output a frequency signal dependent second motor speed representative Ivalue. Sum of the first and second motor speed representative value is compared with a measured motor speed indicative value to derive a speed difference compensation value based on the error therebetween. Based on the speed difference between the sum value and the measured motor speed and the frequency signal, intertia condition on the motor is assumed for controlling transfer characteristics so that the inertia condition in the first model becomes coincident with that of the motor.
    • 电动机速度控制系统采用一种方法来建立具有与待控制的电动机等效的特性的虚拟负载模型。 虚拟负载模型中的一个建立反馈:根据虚拟模型的速度控制电动机。 虚拟模型分为第一和第二模型。 第一个型号的设计具有等同的特性,可输出第一个电机速度代表性数据。 供给第一模型的电流被如此调整,以便将电动机速度表示数据与期望的电动机速度数据之间的差减小到零。 频率信号加到施加到第一个模型的电流上,并提供给电动机以驱动后者。 第二模型接收频率信号以输出取决于第二电动机速度的频率信号Ivalue。 将第一和第二电动机速度代表值的总和与测量的电动机速度指示值进行比较,以基于它们之间的误差导出速度差补偿值。 基于总和值与测量的电机速度和频率信号之间的速度差,假设电机上的惯性条件用于控制传递特性,使得第一模型中的惯性条件与电机的惯性条件一致。