Patent ID: 11929646
Assignee: SAFRAN ELECTRICAL & POWER
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. An electric machine for an aircraft, comprising:
a stator; and
a rotor, rotatably journaled to rotate about a rotation axis within the stator, the rotor comprising:
a hollow tube forming a shaft portion;
a core pack portion, comprising a plurality of poles disposed around the shaft portion; and
a back iron portion, configured to provide a path for magnetic flux to flow between adjacent poles of the core pack portion, the back iron portion being at least partially formed by the shaft portion,

wherein the shaft portion comprises at least one shaft end which extends axially beyond the core pack portion, and wherein the shaft portion, the core pack portion and the back iron portion comprise a soft magnetic material, and
wherein an internal diameter of the shaft portion is reduced in a back iron region which is longitudinally aligned, along the rotation axis, with the core pack portion.