Electrical supply circuit for a turbine engine, turbine engine and aircraft comprising such a turbine engine

An aircraft comprising a turbine engine comprising an electrical supply circuit of a turbine engine comprising a high-voltage DC circuit powered by a high-voltage DC source, connected to at least one DC/AC converter of the electrical supply circuit, the at least one DC/AC converter being respectively connected to at least one rotary electrical machine of the turbine engine, the at least one rotary electrical machine being respectively coupled to at least one propeller of the turbine engine so as to rotate the at least one propeller or to generate electricity by the rotation of the at least one propeller,

• the electrical supply circuit comprising at least one voltage step-up stage connected between the high-voltage source and the at least one DC/AC converter the at least one voltage step-up stage being capable of raising the voltage provided to the at least one rotary electrical machine when said rotary electrical machine rotates the at least one propeller,
• wherein the aircraft further comprises a full authority digital engine control (FADEC):
• adapted to detect a power requirement greater than the power that the turbine engine is able to deliver,
• adapted to control the activation of the voltage step-up stage so that it delivers a high voltage to the rotary electrical machine for a transient period, when a power requirement greater than the power that the turbine engine is able to deliver is detected, and
• adapted to control the end of the activation of the voltage step-up stage at the end of the transition period.