Abstract: An electronic module for a rotary electrical machine which applies to any type of polyphase rotary electrical machine, synchronous or asynchronous, such as alternators or alternator starters, and also whether it is a case of electrical machines for motor vehicles and driven for example by belt, with cooling by air, liquid or any other solution that can be envisaged.

Abstract: An electronic module for a rotary electrical machine which applies to any type of polyphase rotary electrical machine, synchronous or asynchronous, such as alternators or alternator starters, and also whether it is a case of electrical machines for motor vehicles and driven for example by belt, with cooling by air, liquid or any other solution that can be envisaged.

Abstract: The invention relates to a control and power module for an alternator-starter for a motor vehicle, connected between the alternator-starter (3), an on-board wiring network (Ua) and a ground line (GND) of the vehicle, and comprising: a transistor bridge with several branches (B1–B3), and a control unit for comparing a phase voltage (?) of the machine with a reference voltage (Ua, GND) and for controlling the transistors as a function of the result of the comparison, the control unit comprising: a driver (10, 20, 30) for each branch of the transistor bridge, the driver being connected close to the transistors of the branch, and a control circuit for controlling the drivers.

Abstract: The invention concerns a rotating electrical machine, in particular an alternator or an alterno-starter for a motor vehicle, comprising: a rotor (1) centered and fixed on a rotating shaft (2) supported by at least one rear bearing (4), the rear bearing (4) including radial cooling fluid outlets (4a, 4d); a stator (3) enclosing the rotor, the stator including a field coil (7) including windings constituting phases of the electrical machine; an electronic power circuit (15) connected to the windings of the stator phases; a heat dissipation bridge (16) including a first surface whereon is mounted the electronic power circuit and a second surface, opposite said first surface and oriented towards the rear bearing, said second surface forming a longitudinal wall of a passageway (17) for cooling fluid circulation, another longitudinal wall of said passageway (17) being formed by the rear bearing (4) supporting the stator wherein the second surface of the heat dissipating bridge (16) comprises cooling means (18) arra