Abstract

A multilevel inverter is a power electronic device that is capable of generating alternating voltages of desired levels using several DC voltage levels. For high\\medium voltage and high-power applications, multilevel inverters are prominent because of their ability to operate at higher output voltage with very low input. They also give good quality output resulting in lower harmonic distortion within the output. In this paper, a new topology with switched capacitor inverter is proposed. This switched-capacitor is designed in such a way that only one DC voltage source is required to give voltage with triple gain. This paper presents the comparative study of various Multicarrier Pulse Width Modulation techniques with carrier signal based and modulating signal based. Performance factors like % THD and voltage stress across the switches are measured for various modulation techniques and therefore the results are studied. PWM method with the different carrier-based PWM such as sinusoidal PDPWM, PODPWM, APODPWM, VFPWM, COPWM, FFM and modulating signal based PWM such as Rectified Sinusoidal PWM, Trapezoidal PWM, THPWM, 60° Degree Modulated PWM has been analyzed. The simulations for switched-capacitor seven-level inverter using different modulation techniques are done with MATLAB/ SIMULINK 2017b.

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