A REVIEW ON SPEED CONTROL OF THREE-PHASE INDUCTION MOTOR USING VARIABLE FREQUENCY DRIVE TECHNOLOGY
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Abstract
This paper describes speed control using variable frequency drive(VFD). The proposed system is a MATLAB simulink model, which is a closed loop model designed to achieve desired speed control of a three-phase induction motor to control thefrequency and thus the speed. The proposed method conformed to performance predictions and delivered by varying its frequency. The simulink model has six main blocks, namely the boost converter, 3-Phase inverter, 3-Phase squirrel cage induction motor,speed controlling feedback,driver circuit,SPWM Generator. The inverter is comprised of six insulated-gate bipolar transistors (MOSFET),which are fired by gate pulses generated by PID Generator block, filtered with gate driver circuitry along with SPWM generates. Hence, variable speed is achieved at output of induction motor. The project presents the working principle of variable frequency drive (VFD), its performance, and the use of Pulse Width Modulation (SPWM) in a three-phase inverter the desired outputs.
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References
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