Method for controlling a turbomachine comprising an electric motor

1. A method for controlling a turbomachine comprising a fan positioned upstream of a gas generator and delimiting a primary airflow and a secondary airflow, the primary airflow passing through said gas generator which comprises a low-pressure compressor, a high-pressure compressor, a combustion chamber, a high-pressure turbine and a low-pressure turbine, said low-pressure turbine being connected to said low-pressure compressor by a low-pressure rotation shaft and said high-pressure turbine being connected to said high-pressure compressor by a high-pressure rotation shaft, the turbomachine comprising an electric motor forming a torque injection device on the high-pressure rotation shaft, method wherein a fuel flow set point Q CMD in the combustion chamber and a torque set point TRQ CMD provided to the electric motor are determined, the control method comprising:

a step of implementing a first fuel regulation loop in order to determine the fuel flow set point Q CMD comprising:

i. a step of detecting a speed transient intent TopAccel, TopDecel as a function of a difference between a current speed NH and a determined set point speed NH CONS ,

ii. a step of determining a transient speed set point NHTrajAccelCons, NHTrajDecelCons,

iii. a step of determining a fuel correction quantity ΔQ CMD as a function of the transient speed set point NHTrajAccelCons, NHTrajDecelCons; and

iv. a step of determining the fuel flow set point Q CMD as a function of the fuel correction quantity ΔQ CMD

a step of implementing a second torque regulation loop in order to determine the torque set point TRQ CMD comprising

i. a step of determining a torque correction quantity ΔTRQ CMD as a function of the transient speed set point NHTrajAccelCons, NHTrajDecelCons, and

ii. a step of determining the torque set point TRQ CMD as a function of the torque correction quantity ΔTRQ CMD .

2. The control method according to claim 1 , comprising:

during the step of implementing the first fuel regulation loop, a step of detecting a fuel set point stop TopButeeAccel, TopButeeDecel,

during the step of implementing the second torque regulation loop, a step of zero resetting the torque set point TRQ CMD , the step of zero resetting the torque set point TRQ CMD being inhibited in the case of detection of a speed transient intent TopAccel, TopDecel and detection of a fuel set point stop TopButeeAccel, TopButeeDecel.

3. The control method according to claim 2 , wherein the torque set point TRQ CMD is gradually zero reset.

4. The control method according to claim 3 , wherein the reduction gradient is a function of the response time of the first fuel regulation loop.

5. The control method according to claim 1 , comprising a step of doubly integrating the torque correction quantity ΔTRQ CMD in order to determine the torque set point TRQ CMD .

6. The control method according to claim 1 , wherein the torque set point TRQ CMD is bounded between a maximum torque value TRQ max determined by the structure of the electric motor ME and a minimum torque value TRQ min determined by the structure of the electric motor ME.

7. A computer program comprising instructions for executing the steps of the control method according to claim 1 when said program is executed by a computer.

8. An electronic control unit for a turbomachine comprising a memory comprising instructions of the computer program according to claim 7 .

9. A turbomachine comprising the electronic unit according to claim 8 .