Abstract
In this paper, a comparison on Total Harmonic Distortion (THD) by using different pulse width modulation schemes for an industrial drive application is performed. The induction motor drive system driven by a wind energy conversion system is modeled using a Self-Excited Induction Generator. To obtain a constant frequency output an Impedance Source Inverter (ZSI) is connected between the source and the load. The ZSI is selected to avoid the shoot-through limitation which is observed in other conventional PWM inverters. The PWM switching techniques like Trapezoidal PWM, Sinusoidal PWM and Space Vector PWM techniques are mathematically modeled operating at a switching frequency of 10 kHz to control the induction motor drive system though pulse generation. The proposed method is simulated using MATLAB program and the current harmonic levels for driving the IM drive are analyzed. The comparative analysis of current harmonics illustrates the efficient implementation of PWM technique for the drive applications. Based on the simulation evaluation a similar hardware prototype model is setup for a 900W system using Space Vector PWM technique and the results are compared.
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