Ksb Aktiengesellschaft

Samson Aktiengesellschaft

Ksb Se & Co. Kgaa

Manfred Oesterle

Joerg Kiesbauer

Domagoj Vnucec

Thomas Paulus

Jochen Schaab

Daniel Gontermann

Joachim Schullerer

Dirk Hoffmann

Jörg Kiesbauer

Ulrich Konigorski

Julian Fuchs

The invention relates to a method for starting a variable-speed electric motor, wherein upon detection of locking of the motor shaft a positive torque is applied to the motor shaft, and wherein the positive torque is continuously modified with different frequencies to overcome the locking.

Method for starting a variable-speed electric motor

An apparatus and method for closed-loop-control of a fluid conveying system that include at least one pump, at least one consumer, at least one controller valve, and at least one armature as an actuator of the at least one control valve. Pressure and volume flow rate of the consumer are controlled independently of each other by a decoupling controller.

Decoupling of controlled variables in a fluid conveying system with dead time

In a method or system for controlling a process fluid stream within an industrial process plant, a pump is provided in series with a control valve having an associated positioner to control the fluid stream. A required fluid passage quantity for the process fluid stream is set by positioning the control valve with the positioner into a respective valve position and capturing an actual position of the valve. A physically sensible actual property value related to passage of the process fluid through the control valve is determined. The actual property value as well as the actual valve position are evaluated by an evaluation routine with respect to a predetermined optimization parameter specific to the valve with its associated positioner. If a deviation occurs from the optimization parameter, a pump drive value for the pump and control valve position drive value for the valve positioner are tuned to each other in such a way that the optimization parameter is approached.

Method and system for controlling a process fluid stream and positioner

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Frankenthal, Germany

Manfred Oesterle