Speed Sensorless Identification of the Rotor Time Constant in Induction Machines

摘要

A method is proposed to estimate the rotor time constant $T_{R}$ of an induction motor without measurements of the rotor speed/position. The method consists of solving for the roots of a polynomial equation in $T_{R}$ whose coefficients depend only on the stator currents, stator voltages, and their derivatives. Experimental results are presented.