Patent ID: 6234759
Filing Date: 2001-05-22
Classification: F04B,F04D,G05D

Abstract:
A method for regulating the pressure of a fluid moved through a pipe system, the pipe system having at least one consumer, using a means for generating pressure driven by an electric motor, the method comprising the steps of:determining an electrical value proportional to a variable indicative of the motion of the fluid;supplying the electrical value to a controller, the controller having at least one control curve impressed into it, said at least one control curve reflecting fluid pressure in the pipe system in dependence on said variable, said at least one control curve extending with a uniform curvature between a predetermined minimum pressure value and a predetermined maximum pressure value in such a way that, in the direction of increasing pressure, said at least one control curve is located above a straight line connecting points corresponding to the minimum and maximum pressure values and in such a way that said at least one control curve is at the greatest distance from the straight line in a center region between the points corresponding to the minimum and maximum pressure values, the controller controlling the speed of the electric motor to regulate the pressure within the pipe system; andadjusting the speed of the electric motor to compensate if, based on the electrical value, the variable deviates from a desired value for the pressure according to said at least one control curve.