US 12,424,913 B2
Aircraft electrical machine with improved heat transfer by means of a phase change material and associated method
Camel Serghine, Moissy-Cramayel (FR); Thomas Klonowski, Moissy-Cramayel (FR); Pierre Gabriel Marie Quinio, Moissy-Cramayel (FR); Sabrina Siham Ayat, Moissy-Cramayel (FR); Eric Rouland, Saint-Etienne-Du-Rouvray (FR); Sébastien Yon, Saint-Etienne-Du-Rouvray (FR); and Albert Mutabazi, Saint-Etienne-Du-Rouvray (FR)
Assigned to SAFRAN HELICOPTER ENGINES, Bordes (FR); and SAFRAN, Paris (FR)
Appl. No. 18/042,157
Filed by SAFRAN HELICOPTER ENGINES, Bordes (FR); and SAFRAN, Paris (FR)
PCT Filed Aug. 13, 2021, PCT No. PCT/FR2021/051466
§ 371(c)(1), (2) Date Feb. 17, 2023,
PCT Pub. No. WO2022/038326, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 2008583 (FR), filed on Aug. 20, 2020.
Prior Publication US 2023/0318416 A1, Oct. 5, 2023
Int. Cl. H02K 15/12 (2025.01); H02K 3/34 (2006.01); H02K 3/52 (2006.01); H02K 15/02 (2006.01)
CPC H02K 15/12 (2013.01) [H02K 3/345 (2013.01); H02K 15/02 (2013.01); H02K 3/522 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for protecting coils from excessive heating in an aircraft electrical machine comprising a stator and a rotor configured to be rotationally driven with respect to one another, the stator including a plurality of notches or of teeth receiving one and the same plurality or otherwise of coils, a method including:
inserting an electrical insulator into the notches or onto the teeth of the stator,
installing the coils in the notches or on the teeth of the stator,
casting a phase change material in the notches or on the teeth equipped with the coils, the electrical insulator forming a casting mold.