System for calculating and determining angular stop position of a rotating electrical machine such as a synchronous polyphase electrical motor, includes reading response signal of stator windings on application of voltage vectors

摘要

The method includes the steps of applying a sequence of voltage vectors successively to stator winding terminals having a first and second voltage vector in order to modify the electrical characteristics of the windings and a third voltage vector to cancel the torque created by the application of the first and second voltage vectors. The next step includes reading a response signal of the windings on the application of the first and second voltage vectors, and establishing the angular position of the rotor with an uncertainty of + or - 90 degrees from the response signal read.