Abstract
Different mathematical models have been used over the years to examine different problems associated with induction motors. These range from the simple equivalent circuit models to more complex d,q models and abc models which allow the inclusion of various forms of impedance and/or voltage unbalance. This paper presents speed torque characteristics of induction motor which are calculated on the basis of a mathematical model. This technique is in compliance with the IEEE standard test procedure for polyphase induction motors and generators. Induction machines are the major electromechanical conversion devices in industry. There is a mathematical model of induction motor which is designed from the parameters taken from Machine lab. Through this model we can calculate major features of induction motor very easily. This model solves the issue of torque calculation in three phase squirrel cage induction motor of Machine lab. These results checked on a simulink Model for induction motor fed by PWM inverter. The dynamic simulation is done which is an important tool in the validation of the design process of the motor drive systems and also removes resulting error in the prototype construction and testing. The results obtained by Simulink designed model were encouraging when compared to the design made by practical experience.
