Simulation of Field Oriented Control Variable Frequency Induction Motor Drive

now days replacing the DC motor with Induction motors are requirement of each plant due to very high operating cost associated with DC motors. To achieve the better dynamic response like as DC motors IM drives are developed. Field Oriented Control based drives with pulse width modulation technique for operation of inverter. In field oriented control method whole induction motor is converted into mathematical DC motor model and control like a dc motor. by Feedback control loop system a gate pulse is generated for the pulse width modulated inverter and according to that voltage and frequency to be controlled. These new technique improve the torque speed characteristics and reduced the response time. This results a very good speed controlling of induction motor and required speed torque characteristic