Closed Loop PWM Control for Induction Motor Drive Using Dual Output Three Phase Inverter
|Archana.P 1 , Karthick.R 2
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A novel dc link capacitors dual output six switch inverter topology is used for independently supplying two induction motor loads and also used to minimize the dc link voltage ripple and the value of dc link capacitors are reduced in this inverter. A three phase dc link capacitor dual output six switch pwm inverter is used to give a steady output voltage to the motor with low complexity, high reliability and high efficiency. The dc link capacitor dual output six switch inverter employs less number of switches so that the conduction loss is very less in this inverter. The speedtorque curve of an induction motor consists of stable range and an unstable range. To drive varying mechanical loads for long duty in both stable range and instable range the machine needs to be controlled. In closed loop system the efficiency is increased and transient is minimized by controlling the parameter of motors i.e., speed of the motor, the motor runs reliably even in unstable range. For the implementation of the proposed drive the MATLAB/SIMLINK environment has been used. The performance of the inverter is verified in terms of waveforms developed by the motor.