Abstract

The uses of the multilevel inverters (MLI) have been significantly increased the MLI inverters gives the stepped approximation of the sine wave output. The Square wave output-based pulsating AC is sometimes harmful to electrical devices. All the equipment available in the consumer market is designed with the sine wave outputs. Therefore, in this paper, it is proposed to use the second-order low pass filter block to smoothen the multilevel output and to produce the pure sine wave in the system output. This may significantly minimize the harmonic distortion in the output of the system. This paper has improved SPWM modulation pass better performance of the THD. The FFT analysis is done to evaluate the comparison of THD performance. It is concluded that using the filtered output, the stamped AC is converted into the pure sine wave output.

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