Module of rotation angle estimation for the sensorless vector control of the PMSM

摘要

A rotation angle estimation module (100) of a permanent magnetic synchronous motor (PMSM) for the sensorless vector control of the PMSM, the rotation angle estimation module comprising: a fixed flow instruction estimation unit ( 10) configured to calculate a rotational flow (λsd, λsq) and a fixed flow instruction (λsα *, λsß *) based on an angle of rotation (θ) and on the current (Isα, Isß) of a fixed coordinate system ; a fixed flow estimation unit (20) configured to calculate a fixed flow (λsα, λsß) based on the voltage (Vsα, Vsß) of the fixed coordinate system and on the current (Isα, Isß) and on the flow error fixed (Δsα, Δsß) of the fixed coordinate system; a fixed flow error estimation unit (30) configured to use the difference between the fixed flow instruction (λsα *, λsß *) and the fixed flow (λsα, λsß) to calculate the fixed flow error (Δsα, Δsβ ) and feed back the errors to the fixed flow estimation unit (20); and the trigonometric function calculation unit (40) configured to calculate the angle of rotation (θ) a distance that a rotor moves, based on the rotational flow (λsd, λsq) and on the fixed flow (λsα, λsß).