US 11,750,058 B2
Electrical machine and rotor for an electrical machine
Andreas Looser, Zürich (CH); Manuel Blaser, Fislibach (CH); and Konrad Hertig, Brugg (CH)
Assigned to CELEROTON AG, Volketswil (CH)
Filed by Celeroton AG, Volketswil (CH)
Filed on Mar. 29, 2022, as Appl. No. 17/706,803.
Application 17/706,803 is a division of application No. 16/303,995, granted, now 11,329,529, previously published as PCT/EP2017/062591, filed on May 24, 2017.
Claims priority of application No. 16171386 (EP), filed on May 25, 2016.
Prior Publication US 2022/0224186 A1, Jul. 14, 2022
Int. Cl. H02K 5/167 (2006.01); F16C 17/04 (2006.01); H02K 5/24 (2006.01)
CPC H02K 5/1677 (2013.01) [F16C 17/04 (2013.01); H02K 5/24 (2013.01); F16C 2380/26 (2013.01); H02K 2205/03 (2013.01); H02K 2205/09 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotor for a high-speed electrical machine comprising a rotor shaft, the shaft comprising a rotor core and a rotor sleeve, a compensation element being arranged between the rotor core and the rotor sleeve to absorb differences in thermal expansion of the rotor core and the rotor sleeve,
wherein hollow spaces are arranged between the compensation element and the rotor core, and/or between the compensation element and the rotor sleeve;
wherein the compensation element is a different material than the rotor sleeve, and
wherein when the rotor is viewed at a cross-section whose plane extends parallel to an axial direction of the rotor shaft and intersects a center of the rotor shaft, the compensation element extends along the axial direction between the rotor sleeve and the rotor core.