Patent ID: 7911166

Claim:
Polyphase rotary electrical machine for a motor vehicle comprising a rotor, a stator ( 12 ), a control bridge ( 10 ) with controlled switches, and a control device ( 20 , 30 ) supplying control signals (C) to said control bridge ( 10 ), said control device ( 20 , 30 ) comprising means ( 30 ) for applying to at least one said controlled switches of said control bridge ( 10 ) a control signal of said control signals (C) with a phase lead (δ) with respect to a signal representing the position of said rotor with respect to said stator, wherein said means for applying ( 30 ) said control signal comprise means ( 32 , 38 , 34 ) for adjusting the phase lead (δ) from a plurality of values for a given rotation speed (ω) of the rotor.