Method for regulating pump transport volume

Application Number: 00120128
Application Date: 2000.07.11
Publication Number: 1280253
Publication Date: 2001.01.17
Priority Information: 1999/7/12 DE 19931961.8
International: F04D15/00;H02P7/52
Applicant(s) Name: Danfoss A/S
Inventor(s) Name: E.S.Moler
Patent Agency Code: 72001
Patent Agent: su juan
Abstract In a known method for regulating a delivery variable of a pump, which is driven by an electric motor operated with alternating current of variable frequency, especially via a converter, the input power of the motor is measured as the actual value for the delivery variable and is regulated by comparison with a desired value. To avoid the influence of the temperature of the motor on the delivery variable at constant input power, according to the invention upon a change in the temperature in the motor a corresponding compensating variable is taken into account in the control for the purposes of correcting the input power.