A control and power to a rotating electric machine

The invention relates to a control and power device for a rotating electrical machine comprising a management circuit and a power circuit, said power circuit having a plurality of power transistors and drive circuits (DRIV) associated said transistors. The device is characterized in that it comprises connection means between said drive and said management circuit circuit for ensuring a power of said driving circuits (DRIV) and transmitting at least one potential passing between said circuit and said management circuit pilotage.Domaine technique of the invention: starter-alternator