| 摘要 |
A system for control of rotational speed and power on a heavy rotating process machine (P) is disclosed. The rotating process machine (P) is connected to at least one motor or generator (M1) through a shaft and arranged to rotate with a rotational speed given by the motor or generator (M1). The shaft connecting the process machine (P) to the motor or generator (M1) constitutes the rotational axis of the processing machine and the rotating process machine (P) has an adjustable a load control (PC). The rotational speed of the motor or generator (M1) is controlled by a control system (C) and the control system (C) also controls the load control (PC) to achieve soft transitions between several selectable rotational speeds. Lower energy consumption is achieved by step-by-step adjustment of the power and rotational speed of the motor or generator (M1) to varying energy requirements. |
