US 12,127,855 B2
DC motor with angle sensor, rotor with windings and rotary transmitter for DC motor, couch for magnetic resonance system, and method for operating a DC motor with angle sensor
Johann Sukkau, Herzogenaurach (DE); and Christopher Horn, Erlangen (DE)
Assigned to Siemens Healthineers AG, Erlangen (DE)
Filed by Siemens Healthcare GmbH, Erlangen (DE)
Filed on Sep. 9, 2021, as Appl. No. 17/470,011.
Claims priority of application No. 102020211327.0 (DE), filed on Sep. 9, 2020.
Prior Publication US 2022/0071564 A1, Mar. 10, 2022
Int. Cl. H02K 11/33 (2016.01); A61B 5/00 (2006.01); A61B 5/055 (2006.01); H02K 11/215 (2016.01); H02K 29/08 (2006.01)
CPC A61B 5/704 (2013.01) [A61B 5/055 (2013.01); H02K 11/215 (2016.01); H02K 11/33 (2016.01); H02K 29/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A direct current (DC) motor for operation in an external magnetic field, comprising:
a rotor which is rotatable about a rotation axis and has first and second windings;
at least four continuous rotary transmitters, wherein:
first and second rotary transmitters of the at least four continuous rotary transmitters are associated with the first winding and are configured to supply the first winding with direct current, the first rotary transmitter forming a positive pole of the first winding and the second rotary transmitter forming a negative pole of the first winding, and
third and fourth rotary transmitters of the at least four continuous rotary transmitters are associated with the second winding and are configured to supply the second winding with direct current, the third rotary transmitter forming a positive pole of the second winding and the fourth rotary transmitter forming a negative pole of the second winding;
an angle sensor configured to determine an angular position of the rotor, and
a controller configured to control the direct current feed to at least one of the first and second windings based on the angular position of the rotor,
wherein the motor is oriented relative to the external magnetic field during operation such that the rotation axis extends transversely to the external magnetic field.