Induction motor drive by 3-level PWM inverter by v/f method

Be it domestic application or industry, motion control is required everywhere. The systems that are employed for this purpose are called drives. Such a system, if makes use of electric motors is known as an electrical drive. In electrical drives, use of various sensors and control algorithms is done to control the speed of the motor using suitable speed control methods. Earlier only dc motors were employed for drives requiring variable speeds due to ease of their speed control methods. The conventional methods of speed control of an induction motor were either too expensive or too inefficient thus restricting their application to only constant speed drives. However, modern trends and development of speed control methods of an induction motor have increased the use of induction motors in electrical drives extensively. In this project, we will study the various methods of speed control of a 3-ph induction motor and compared them using their Torque-Speed characteristics. Also the transients during the starting of a 3-ph induction motor will be studied using MATLAB Simulink and the effects of various parameters such as rotor and stator resistances and inductances well be analyzed