Control method for electrically driven metering pump, by correcting pump drive based on difference between theoretical flow rate and reference values

摘要

An electric motor is driven in accordance with preset or externally set values. After a predetermined operating time T, a theoretical flow rate (2) resulting from the pump being driven within this operating time is determined and compared with a reference flow quantity derived from the preset values. Based on the difference (3), the pump drive is corrected. The theoretical flow quantity may be derived from the number of motor rotation or pump strokes in the operating time.