| 摘要 |
A control voltage, which is dependent on an actual value and a required value, is supplied through a regulator (21) to the controllable rectifiers which are located in the winding circuits of the three-phase motor. The actual value is supplied by an actual-value sensor (20) which is coupled to the drive shaft of the motor, and the required value is supplied by a required-value transmitter (26). The required-value transmitter produces the required value by integrating an adjustable input signal, additionally differentiating the input signal, by means of a rounding device (25), for smooth acceleration and braking of the rotation speed, and the differentiated input signal being included in the integration process with opposite polarity to the original input signal. Once the differentiation process has been completed, the required value rises or falls with an adjustable gradient until a maximum or minimum value is reached. This method is particularly suitable for controlling the drive motor of a passenger lift. <IMAGE> |
