METHOD FOR DETECTING AN ANGULAR POSITION OF A SYNCHRONOUS MACHINE ROTOR; APPLICATION TO THE POSITIONING AND HOLDING IN POSITION OF A ROTOR OF SYNCHRONOUS MACHINE, AND TO THE CONTROL OF A SYNCHRONOUS MACHINE ROTOR; AND CORRESPONDING DEVICES

摘要

The method for detecting an estimated angular position () of a rotor (2) of a synchronous machine (1) with respect to a three-phase stator (3) comprises the steps of: - generating a sinusoidal detection voltage signal having a frequency lower than an electrical frequency of the synchronous machine, - applying the detection voltage signal to an input d of a reference transformer (6) of a reference d, q in a mark α, β, - supplying the stator (3) of the synchronous machine according to a detection voltage signal in the α, β mark, - collect current signals (Ia-Ic) produced by the stator in a reference frame a, b, c, and the transforming to obtain current signals in the α, β coordinate, and, - comparatively processing the current signals obtained and the detection voltage signal by means of an observer (11) configured from a model incorporating the signal sinusoidal detection.