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A turbine engine for a helicopter, including a gas generator and a free turbine driven in rotation by the gas flow generated by the gas generator is disclosed. The turbine engine further includes a motor/generator coupled to a shaft of the gas generator, to provide a quantity of additional rotationa

A turbine engine for a helicopter, including a gas generator and a free turbine driven in rotation by the gas flow generated by the gas generator is disclosed. The turbine engine further includes a motor/generator coupled to a shaft of the gas generator, to provide a quantity of additional rotational kinetic energy to the shaft during a stage of turbine engine acceleration, or to draw a quantity of rotational kinetic energy from the shaft during a stage of turbine engine deceleration.

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1. A turbine engine of an aircraft, comprising: a gas generator and a free turbine driven in rotation by the gas flow generated by the gas generator;a first electricity generator coupled to a shaft of the free turbine;a storage unit electrically connected to the first electricity generator; andan el

1. A turbine engine of an aircraft, comprising: a gas generator and a free turbine driven in rotation by the gas flow generated by the gas generator;a first electricity generator coupled to a shaft of the free turbine;a storage unit electrically connected to the first electricity generator; andan electric motor/generator electrically connected to the storage unit and mechanically coupled to a shaft of the gas generator,wherein the shaft of the free turbine is coupled to a rotor of a helicopter,wherein the storage unit supplies power to the motor/generator during a stage of turbine engine acceleration to provide a quantity of additional rotational kinetic energy to the gas generator shaft and stores a quantity of kinetic energy drawn from the gas generator shaft by the motor/generator in a form of electrical energy during a stage of turbine engine deceleration, andwherein the storage unit is recharged by the first electricity generator. 2. A turbine engine according to claim 1, further comprises a converter and an electronic control device that are positioned between the motor/generator and the storage unit. 3. A turbine engine according to claim 1, wherein the storage unit is an electric battery, or a group of supercapacitors, or a combination of both. 4. A turbine engine according to claim 1, wherein the motor/generator starts the gas generator while starting the turbine engine. 5. A turbine engine of an aircraft, comprising: a gas generator and a free turbine driven in rotation by the gas flow generated by the gas generator;a first electricity generator coupled to a shaft of the free turbine;a storage unit electrically connected to the first electricity generator;an electric motor/generator electrically connected to the storage unit and mechanically coupled to a shaft of the gas generator; anda converter and an electronic control device positioned between and electrically connected to the motor/generator and the storage unit,wherein the shaft of the free turbine is coupled to a rotor of a helicopter,wherein the storage unit supplies power to the motor/generator during a stage of turbine engine acceleration to provide a quantity of additional rotational kinetic energy to the gas generator shaft and stores a quantity of kinetic energy drawn from the gas generator shaft by the motor/generator in a form of electrical energy during a stage of turbine engine deceleration,wherein the storage unit is recharged by the first electricity generator, andwherein the motor/generator starts the gas generator while starting the turbine engine. 6. A turbine engine according to claim 5, wherein the storage unit is an electric battery, or a group of supercapacitors, or a combination of both. 7. A turbine engine according to claim 1, further comprising a second motor/generator that includes the first electricity generator, the second motor/generator is coupled to a shaft of the rotor, and wherein the motor/generator includes a second electricity generator. 8. A turbine engine according to claim 5, further comprising a second motor/generator that includes the first electricity generator, the second motor/generator is coupled to a shaft of the rotor, and wherein the motor/generator includes a second electricity generator.