US 12,191,727 B2
Electric machine and method for operating the same
Matthias Gramann, Renchen (DE); and Christian Nolte, Hassfurt (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 17/311,402
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Nov. 27, 2019, PCT No. PCT/DE2019/101015
§ 371(c)(1), (2) Date Jun. 7, 2021,
PCT Pub. No. WO2020/114552, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 102018131412.4 (DE), filed on Dec. 7, 2018; and application No. 102019101964.8 (DE), filed on Jan. 28, 2019.
Prior Publication US 2022/0029489 A1, Jan. 27, 2022
Int. Cl. H02K 3/28 (2006.01); H02K 11/20 (2016.01)
CPC H02K 3/28 (2013.01) [H02K 11/20 (2016.01); H02K 2213/09 (2013.01); H02K 2213/12 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An electric machine, comprising:
a stator;
a rotor including a plurality of rotor magnets;
a plurality of sub-machine systems formed by dividing windings for each phase on the stator or on the rotor into separately switchable winding sections, each said winding section being assigned to each said respective sub-machine system for each said phase and each said sub-machine system being configured to act as an electric machine; and
at least one permanent magnet that is configured for temporary demagnetization of at least one of the plurality of rotor magnets, wherein rotation of the at least one permanent magnet is matched with rotation of the rotor such that polarization of the at least one permanent magnet and the plurality of rotor magnets are opposite to one another.