Patent ID: 9071177
Filing Date: 2015-06-30
Classification: H02P

Abstract:
1. Process for controlling a resistant torque (C) of a motor vehicle alternator intended to be coupled to an internal combustion engine of a vehicle and capable of producing a feed voltage (B+) for a system on board the said vehicle in response to an excitation current (I_ROTOR) applied to a rotor of said alternator, the said process comprising limiting said resistant torque (C) by determining a maximum duty cycle (DC_LIMIT) for the excitation current (I_ROTOR) in relation to variables taken from a group comprising a rotation speed (V_ROTOR) of said rotor, a temperature (T_ROTOR) of said rotor, said excitation current (I_ROTOR) and said feed voltage (B+) being characterised in that the wherein said maximum duty cycle (DC_LIMIT) is determined as a function of at least said rotation speed (V_ROTOR) and said temperature (T_ROTOR), said maximum duty cycle (DC_LIMIT) being equal to a linear function of said temperature (T_ROTOR) having a gradient which is inversely proportional to said rotation speed (V_ROTOR).