摘要 |
The invention relates to a heavy rotating process machine (P), which for example is a turbine or a propeller, with a system for controlling rotational speed, where said machine (P) is connected to at least one motor (M1) and arranged to rotate with a given rotational speed given by the motor (M1), where the motor (M1) is connected to a control system (C) and the rotational speed of the motor (M1) is arranged to be controlled by a control system (C). The rotating process machine (P) comprises a load control (PC) arranged to be adaptable, the control system (C) is connected to the rotating process machine (P). With the invention, one achieves soft transitions between several selectable rotational speeds and lower energy consumption by step by step adjusting the size and the rotational speed of the motor (M1) to varying energy requirement. |