US 12,467,413 B2
Method for regulating a turbomachine
Guillaume François Daniel Bidan, Moissy-Cramayel (FR); and Antoine Pierre Emmanuel Ferrand, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 18/577,641
Filed by SAFRAN, Paris (FR)
PCT Filed Jul. 5, 2022, PCT No. PCT/FR2022/051336
§ 371(c)(1), (2) Date Jan. 8, 2024,
PCT Pub. No. WO2023/281202, PCT Pub. Date Jan. 12, 2023.
Claims priority of application No. 2107474 (FR), filed on Jul. 9, 2021.
Prior Publication US 2024/0318604 A1, Sep. 26, 2024
Int. Cl. F02C 7/36 (2006.01); B64D 27/33 (2024.01); B64D 27/35 (2024.01); B64D 35/08 (2025.01); F01D 15/10 (2006.01); F01D 21/14 (2006.01)
CPC F02C 7/36 (2013.01) [F01D 15/10 (2013.01); F01D 21/14 (2013.01); F05D 2270/023 (2013.01); F05D 2270/044 (2013.01)] 13 Claims
OG exemplary drawing
 
1. Method for regulating a turbomachine, the turbomachine comprising an electric machine, a combustion chamber, a high-pressure turbine connected to a high-pressure shaft and a low-pressure turbine connected to a low-pressure shaft, wherein hot gases exiting the high-pressure turbine drive the low-pressure turbine, the method comprising:
assisting the high-pressure shaft by means of the electric machine, in order to provide said high-pressure shaft with mechanical energy coming from electrical energy supplied to the electric machine, to supplement thermal energy coming from the combustion chamber of the turbomachine, during an assistance period;
determining, during the assistance period, an energy deficit at an outlet of the high-pressure turbine, as a function of a difference between the power of the hot gases and a reference power of the hot gases in absence of electrical assistance;
calculating a collectable mechanical torque at the high-pressure shaft to be collected by means of the electric machine, as a function of said energy deficit; and
correcting a speed of the low-pressure shaft by collecting said collectable mechanical torque from the high-pressure shaft, by means of the electric machine, at the end of the assistance period in order to reach a reference speed of the low-pressure shaft that was previously determined in absence of electrical assistance by the electric machine.
 
7. Method for regulating a turbomachine, the turbomachine comprising an electric machine, a combustion chamber, a high-pressure turbine connected to a high-pressure shaft and a low-pressure turbine connected to a low-pressure shaft, wherein hot gases exiting the high-pressure turbine drive the low-pressure turbine, the method comprising:
assisting the high-pressure shaft by means of the electric machine, in order to provide said high-pressure shaft with mechanical assistance torque coming from electrical energy supplied to the electric machine, to supplement thermal energy coming from the combustion chamber of the turbomachine, during an assistance period;
determining a correction coefficient as a function of the mechanical assistance torque generated by means of the electric machine; and
correcting a speed of the low-pressure shaft by regulating the speed of the high-pressure shaft as a function of the correction coefficient in order to reach a reference speed of the low-pressure shaft that was previously determined in absence of electrical assistance by the electric machine.