US 12,132,363 B2
Self-starting reluctance motor
Davide Pagliaro, Modena (IT); and Antonio Scozzafava, Calderara di Reno (IT)
Assigned to MOTOVARIO S.P.A., (IT)
Appl. No. 17/910,260
Filed by MOTOVARIO S.P.A., Formigine (IT)
PCT Filed Mar. 17, 2021, PCT No. PCT/IB2021/052210
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2021/191741, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 102020000006052 (IT), filed on Mar. 23, 2020.
Prior Publication US 2023/0120904 A1, Apr. 20, 2023
Int. Cl. H02K 19/14 (2006.01); H02K 19/10 (2006.01)
CPC H02K 19/14 (2013.01) [H02K 19/103 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A rotor for an electric motor comprising:
a drive shaft having an axis of rotation;
a plurality of annular rotor plates, preferably identical to each other, mounted on the drive shaft and superposed along the axis of rotation, each rotor plate having a plurality of openings, the openings of adjacent rotor plates being at least partly aligned along a direction parallel to the axis of rotation; said rotor comprising
a pair of closing plates located along the axis of rotation at the ends of said plurality of rotor plates;
a plurality of bars, passing through at least part of said plurality of openings;
a pair of short-circuit rings located along the axis of rotation at the ends of said plurality of bars, externally to the pair of closing plates;
each rotor plate being characterized in that an active ratio between a first area occupied by the plurality of openings and a total area of the rotor plate is greater than or equal to 0.30.