Mecos Traxler Ag

Medela Holding Ag

Mecos Ag

Richemont International S.a.

Philipp Bühler

Denis Zimmermann

René Larsonneur

Dominic Sturm

Silicone pacifier

A magnetic bearing device for magnetically suspending a rotor () for rotation about a rotation axis (A) comprises an amplifier device, a first main coil (p) and a second main coil (n). In order to compensate for a stray flux that is created when the main coils are supplied with currents from the amplifier device, a compensation coil (c) is connected between a common node of the main coils and the amplifier device with such polarity that a current flowing through the compensation coil will diminish the stray flux caused by the main coils (p, n).

Stray flux compensation in a magnetic bearing device

A method and a controller for controlling a magnetic bearing device, in which a rotor is suspended for rotation around a shaft, are disclosed. Sensor signals are transformed to yield tilt displacement signals (S&#x3b8;x, S&#x3b8;y) which correspond to tilting displacements of the shaft in predetermined directions (x, y). From the tilt displacement signals (S&#x3b8;x, S&#x3b8;y), tilt control signals A&#x3b8;x, A&#x3b8;y) are derived; these are transformed to yield actuator control signals for driving electromagnetic actuators in the magnetic bearing device. According to the invention, tilting displacements for which the tilt vector rotates about the device axis (z) with a first predetermined sense of rotation are controlled separately from tilting displacements for which the tilt direction vector rotates about the device axis (z) with a second sense of rotation opposite to the first predetermined sense of rotation. In this way, control of nutation and precession can be achieved without influence from blade vibrations or shaft bending modes.

Method and apparatus for controlling a magnetic bearing device

A device for contact-less measurement of distances () in multiple directions of an electrically conductive body () comprises a plurality of inductive elements (). At least one (1) of the plurality of inductive elements () is placed essentially around the body (). The other inductive ele-ments or other magnetic field sensors () are provided in the vicinity of said one inductive element (). The device with these features allows integrating a multi axis inductive sensor on a single circuit board.

Evaluation device and vibration damper for a racket

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Zurich, Switzerland

Philipp Bühler