US 12,143,044 B2
Device and method for stopping an electric machine for a turbine engine
Nawal Jaljal, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 17/798,340
Filed by SAFRAN, Paris (FR)
PCT Filed Feb. 2, 2021, PCT No. PCT/FR2021/050186
§ 371(c)(1), (2) Date Aug. 9, 2022,
PCT Pub. No. WO2021/160952, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 2001300 (FR), filed on Feb. 10, 2020.
Prior Publication US 2023/0048426 A1, Feb. 16, 2023
Int. Cl. F02K 5/00 (2006.01); F02C 6/08 (2006.01); F02C 7/25 (2006.01); F02C 7/32 (2006.01); H02K 9/19 (2006.01); H02K 21/14 (2006.01); H02P 29/024 (2016.01)
CPC H02P 29/024 (2013.01) [F02C 6/08 (2013.01); F02C 7/25 (2013.01); F02C 7/32 (2013.01); H02K 9/19 (2013.01); H02K 21/14 (2013.01); F05D 2270/09 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An electrical assembly for a turbomachine, comprising:
an electric machine configured to be disposed in the turbomachine, and comprising a stator and a rotor, the rotor being configured to be rotationally secured to a shaft of the turbomachine, and comprising magnets,
a short-circuit detector configured to detect a presence of a short-circuit in the electric machine,
a hot air injector configured to draw hot air off the turbomachine at a temperature greater than the temperature of demagnetization of the magnets of the rotor, and to inject the drawn hot air onto the magnets of said rotor when the short-circuit detector detects the presence of a short-circuit in the electric machine, and
a cool air injector, configured to draw cool air off the turbomachine and to inject it into an inner chamber of the turbomachine when the short-circuit detector detects the presence of a short-circuit in the electric machine, the temperature of the cool air drawn by the cool air injector being less than the temperature of the hot air drawn by the hot air injector, wherein the cool air injector is configured to inject cool air into the inner chamber of the turbomachine in parallel to the injection of hot air onto the magnets of the rotor by the hot air injector.