Logicdata Electronic & Software Entwicklungs Gmbh

Hanning Elektro-werke Gmbh & Co. Kg

Xylem IP Holdings, LLC

Herbert Grabner

Siegfried Silber

Walter Koch

Peter Hutterer

Karsten Laing

Wolfgang Amrhein

Thomas Henke

Ralf De La Haye

Andreas Levermann

Thomas Stallinger

Wolfgang Amrheim

An embodiment linear actuator for an electrically adjustable piece of furniture includes a brushless DC motor arranged to effect a linear movement of the linear actuator, as well as a control device for controlling the motor.

Linear actuator with a rotating brushless DC motor

The invention relates to an engine control for a synchronous motor having a number of N stator coils set off in regard to each other, which are arranged around a rotor of the synchronous motor, wherein there may be impressed upon the stator coils by the engine control a coil voltage and wherein there is formed a coil current having a direct current component in a co-ordinate system rotating proportionally with the number of revolutions performed by the synchronous motor as well as a cross current component, wherein the cross current component effects a tangential force activating the rotor in the direction of rotation and wherein the direct current component effects a force acting perpendicularly to the rotor surface on the rotor, wherein the engine control has a direct current generator for generating a direct current component periodically alternating in the rotating co-ordinate system, in order to neutralize oscillations of the synchronous motor activated by the engine control by means of the force generated perpendicularly to the rotor surface, wherein the direct current generator is formed for evaluating at least one angle information and an operating cross current.

Engine control for a synchronous motor

A device for limiting an unbalance in inside a centrifugal, with an electric motor to drive a rotating component disposed in an enclosure around a rotational axis, wherein a rotor of the electric motor is non-rotatably connected to the rotating component, a bearing assembly for the rotor and the stator to be arranged in, and a stabilizer unit which generates as a function of a disturbing force acting on the rotating component a balancing force that is adapted to compensate said latter, the bearing assembly including support means such as to make the stator radially movable, and the stabilizer arranged radially outside and/or inside said stator and/or support means of the bearing assembly and having stabilizing means whereby in aggregate a radial balancing force can be generated.

Device for dynamic balancing of a rotating component of a centrifuge

The invention relates to a body of revolution, in particular for a centrifugal, which comprises a rotator, an electric motor with a stator and a rotor wherein said latter is fixed to the rotator for rotational movement therewith, a support to which the stator of the electric motor is attached and a bearing unit for rotational arrangement of the rotor around an axis of rotation which comprises at least one bearing adapted to coact with an electromagnetic stabilizer unit in such a way that disturbing forces and/or disturbing vibrations of the rotator are counteracted and/or compensated.

Magnetically levitated and controlled body of revolution

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Linz, Austria

Herbert Grabner