Patent ID: 9584051
Date: 2017-02-28
CPC Classifications: H02P

Claim:
1. Method for estimating the angular position and/or the speed of rotation of a rotor contained in a polyphase synchronous rotary electrical machine ( 1 ) also comprising a stator, said machine being supplied by means of a polyphase inverter ( 3 ) connected to a source of direct voltage ( 2 ), and said polyphase inverter ( 3 ) being controlled such as to be able to apply ( 11 ) vectorial pulse width modulation ( 10 ) to said stator, said angular position estimation being obtained by calculating at least one first estimator as the solution of a differential algebraic equation, the coefficients of which depend on electrical parameters of said machine ( 1 ) comprising first and second inductances of said stator, respectively according to a direct axis and an axis which is in quadrature relative to a magnetic flux produced by said rotor, a resistance of a phase winding and said magnetic flux produced by said rotor, and additionally dependent on a reference voltage of said vectorial pulse width modulation ( 10 ), phase currents ( 5 ), and first derivatives relative to the time of said phase currents ( 5 ), and said speed of rotation being estimated by calculating a second estimator obtained by calculation of a first derivative of said first estimator relative to the time; wherein said differential algebraic equation is written in the case when said polyphase synchronous rotary electrical machine ( where: a derivation operator relative to the time is known as ●; {circumflex over (θ)}, {circumflex over (ω)} represent respectively said first and second estimators; u=[u y=[y L R Φ