Rotation angle estimation module for sensorless vector control of PMSM

摘要

The present invention, still coordinate system (αβ) and moving distance of the rotation of the rotor to the vector diagram based on the rotational coordinate system (dq) it relates to an apparatus for estimating a rotational angle for the sensor-less vector control of the synchronous motor each (θ ) comprises a rotating start angle estimating portion for estimating a bar, stop the magnetic flux command estimation still flux estimator, magnetic flux stop error estimator, and a trigonometric function calculating section.;