| 摘要 |
A method for the estimation of the disturbances in an observer of a speed of an induction motor consisting in measuring of components x and y of vectors of voltage and of stator current determined in Cartesian coordinate system fixed to the stator, estimating the values of the components x and y of a stator current vector and comparing with actual, measured values of the components of a stator current, estimating of the components x and y of a rotor flux vector, estimating the angular speed of the rotor is characterized according to the present invention by estimating the components x and y of the disturbances (zx, zy) in a system realizing the following relation: (I) (II) on the basis of measured components of a stator current vector (isx, isy), estimated components of a stator current vector ( isx, isy ),estimated angular speed of a rotor (?r),estimated components of a rotor flux vector (?rx,?ry ) and the value of the increment of the estimated angular speed (?? ) in time (Ts) between two succesive measurements of components of a stator current (isx, isy). |
