US 12,323,078 B2
Method for controlling a planar drive system, and planar drive system
Irina Stockem, Gütersloh (DE); Viktor Balzer, Herford (DE); Keir Maguire, North Vancouver (CA); and Xiaodong Zhang, Burnaby (CA)
Assigned to Beckhoff Automation GmbH, Verl (DE)
Filed by Beckhoff Automation GmbH, Verl (DE)
Filed on May 11, 2023, as Appl. No. 18/315,747.
Application 18/315,747 is a continuation of application No. PCT/EP2021/082169, filed on Nov. 18, 2021.
Claims priority of application No. 10 2020 130 795.0 (DE), filed on Nov. 20, 2020.
Prior Publication US 2023/0283212 A1, Sep. 7, 2023
Int. Cl. H02P 1/00 (2006.01); H02K 41/03 (2006.01); H02P 25/064 (2016.01)
CPC H02P 25/064 (2016.02) [H02K 41/031 (2013.01); H02K 2201/18 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for controlling a planar drive system,
wherein the planar drive system comprises:
a stator unit with a plurality of coil groups for generating a stator magnetic field, and
a rotor with a plurality of magnet units for generating a rotor magnetic field,
wherein the rotor is drivable on the stator unit via magnetic coupling between the stator magnetic field and the rotor magnetic field,
wherein the plurality of coil groups comprises rectangular X coil groups and rectangular Y coil groups, wherein the X coil groups are aligned along an X direction of the stator unit and the Y coil groups are aligned along a Y direction of the stator unit that is perpendicular to the X direction of the stator unit,
wherein the plurality of magnet units of the rotor comprises rectangular X magnet units and rectangular Y magnet units, wherein the X magnet units are aligned along an X direction of the rotor, and wherein the Y magnet units are aligned along a Y direction of the rotor that is perpendicular to the X direction of the rotor; and
wherein the method comprises:
moving the rotor to a rotational position of the rotor on the stator unit in a movement step, wherein, 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;
actuating the coil groups which are covered by the magnet units of the rotor in the rotational position and generating a stator magnetic field by each actuated coil group in an actuation step; and
rotating the rotor about an axis of rotation that is oriented perpendicular to a stator surface of the stator unit by a predetermined angle of rotation by way of the stator magnetic fields of the actuated coil groups covered by the magnet units of the rotor in a rotation step.