| 摘要 |
The invention relates to a process and device for feedback-controlling the speed of an electric motor (10) driving a rotary machine (6), in particular a pump or fan, according to the capacity requirement at the rotary machine, which is variab le with time on the consumer side (4, 8) thereof, using a feedback controller (16) t he output of which determines the speed of the electric motor (10). The process according to the invention is characterized in that the electrical power (P) actually tak en up by the electric motor (10) is measured and in that a signal representing the electrical power measured is produced and supplied as input to the feedback controller (16), where it is converted into the desired output according to a predetermined or right then calculated characteristic curve (P install(Q)). |
