Patent ID: 7102304

Claim:
A control device ( 1 ) for a rotating electrical machine, configured to be connected to a ground and to be reversible to operate as an electric generator in an alternator mode and as an electric motor in motor mode in order to start a thermal motor, including a command and control unit ( 3 ) to control the rotating electrical machine in alternator mode or in motor mode, an electric power network ( 5 ), a main battery ( 4 ) connected to the electric power network ( 5 ) and to the ground of the rotating electrical machine ( 2 ), the rotating electrical machine comprising: a plurality of phases each having at least one winding (E 1 , E 2 , E 3 ); a stator (S) equipped with phase windings; an inverter (P, 20) which powers the phase windings of the stator for operation in motor mode; a rectifier bridge for current generated by the phase windings of the stator for operation in alternator mode; characterized in that the inverter (p, 20) is powered in motor mode by a start-up control unit ( 9 ) which has a secondary voltage source ( 6 ) that can provide a voltage greater than the voltage present on the electric power network ( 5 ) to increase the machine torque at the start-up of the electric motor, in that the inverter is connected to the positive terminal of the secondary voltage source ( 6 ) via a first switch (K 1 ) in motor mode, and in that the rectifier bridge (P) is connected to the positive terminal of the main battery ( 4 ) via a second switch (K 2 ) in alternator mode.