Beckhoff Automation Gmbh

Keir Maguire

Uwe Prüssmeier

Klaus Neumann

Lukas Bentfeld

Tim Kaulmann

Johannes Beckhoff

Benjamin Jurke

Dominik Sensen

Alexander Weddemann

Xiaodong Zhang

Viktor Balzer

Irina Stockem

Felix Schulte

A method for controlling a planar drive system includes controlling a rotor along a control path starting from a first position on a stator module, and determining a sensor pattern for magnetic field sensors of a sensor module. The sensor pattern includes a subset of the magnetic field sensors with at least one of the magnetic field sensors not comprised by the sensor pattern, and an area of the sensor pattern is at least partially covered by the rotor in a position along the control path. The method includes measuring values of the rotor magnetic field with the aid of the magnetic field sensors of the sensor pattern, detecting the rotor, and determining a second position of the rotor based on the measured values. The invention further relates to a planar drive system.

Method for controlling a planar drive system, and planar drive system

A method for controlling a planar drive system with a stator unit and a rotor includes moving the rotor to a rotational position on the stator unit. In the rotational position, each magnet unit of the rotor covers a coil group of the stator unit which is not covered by any other magnet unit of the rotor, in each orientation of the rotor relative to the stator unit. The method includes actuating the coil groups which are covered by the magnet units of the rotor in the rotational position, generating a stator magnetic field by each actuated coil group, and rotating the rotor about an axis oriented perpendicular to a surface of the stator unit by a predetermined angle, by way of the stator magnetic fields of the actuated coil groups covered by the magnet units of the rotor. A planar drive system is adapted to perform the method.

A method for controlling a planar drive system includes determining values of magnetic stator fields for different energizing currents and spatial regions in a two-dimensional array of magnetic field sensors, generating at least one magnetic stator field by applying energizing currents to stator conductors to electrically control a rotor, determining measured values of a total magnetic field via the magnetic field sensors for a plurality of the spatial regions to determine a position of the rotor, compensating contributions of the magnetic stator fields to the measured values of the total magnetic field determined by the magnetic field sensors, generating measured values of the magnetic field determined by the respective magnetic field sensors for the respective space regions, and determining a position of the rotor based on the generated measured values of the magnetic fields. The planar drive system includes at least a controller, a stator module, and a rotor.

Method for controlling a planar drive system and planar drive system

A method for controlling a planar drive system includes generating a position allocating function, in an allocation generating step; measuring a plurality of measuring values of the magnetic rotor field by magnetic field sensors for a position of the rotor relative to the stator module, in a magnetic rotor field determining step; applying the position determination function to the plurality of measuring values of the magnetic rotor field of the plurality of magnetic field sensors, in a measuring value analysis step; and determining the position of the rotor relative to the stator module on the basis of the measurements of the magnetic rotor field measured by the plurality of magnetic field sensors and based on the allocations of the position allocating function, in a position determining step. The application further relates to such a planar drive system.

Method of controlling a planar drive system and planar drive system

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Vancouver, Canada

Keir Maguire