Modern control methods in the operation of different electrical machines are essential to develop
an integrated mathematical model for the machine. The model is to calculate its inputs and
outputs, which should match the performance of the machine. In order that, the model gives
accurate inputs and outputs that matching the machine, it is necessary to introduce model
parameters that are calculated according to machine rating as well as some laboratory
measurements on the machine. In this research, a model of three phase induction motor is used to
obtain the parameters of the proposed model using different methods. The calculations using that
model can provide all laboratory operating results of the motor and satisfy its data sheet
information. In this paper, different methods are used to estimate the parameters; curve fitting
algorithm and iteration method. Accurate results of the model are obtained. The obtained results
from the different methods are compared with the measured and show good agreement. Utilizing
the slip-torque and slip-current motor characteristic, the estimation method is exhibited with some
basic numerical illustrations.