METHOD AND DEVICE FOR DETECTING THE ELECTRICAL POSITION OF AN ELECTRICAL MACHINE ROTOR
The invention concerns a method for detecting the electrical position of an electrical machine rotor (4) coupled (6) to an internal combustion engine (7) equipped with a sensor (8) delivering a first angular position signal for speeds higher than a minimum speed measurement (VM), which consists in generating, based on the characteristics of the electrical machine, a second signal representing an estimated angular position of the rotor for speeds lower than an approximation speed (VA); depending on the estimated rotational speed, delivering to the means controlling the machine either the estimated value of the angular position when the estimated speed is lower than a first threshold (S1), or the sensor signal when the estimated speed is higher than a second threshold (S2), and switching from one signal to the other in a range between the first threshold and the second threshold.