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INTERNATIONAL JOURNAL OF EDUCATION, MODERN MANAGEMENT, APPLIED SCIENCE & SOCIAL SCIENCE (IJEMMASSS) [ Vol. 8 | No. 2 (II) | April - June, 2026 ]

Analysis Switching Pulse of DC Level Shifting Modulating Technique in Multilevel Inverter

Prof. Ruchi M. Pachagade, Prof. Sachin M. Nath, Prof. Manish D. Mahale & Prof. Umakant R. Kothoke

Multilevel Inverters (MLI) is contemplating in an attempt to optimize the ripple content and voltage stress across power semiconductor devices. This breakthrough is an essential aspect for a high power and medium voltage applications. In this work, Modulating technique is analyzed and designed to synthesize maximum level at the output. The proposed DC level switching technique is used on cascaded topology is designed to reduce total harmonic distortions in output AC waveform. The detailed analysis is done on 9-level (line-line) with continuous AC sinusoidal waveform. This 9-level is achieved by cascading two basic cells in series. The topology used can be extended for N level by using (3N-3)/2 switches and (N- 1)/4 dc sources. DC level shifting technique consists of reference sinusoidal wave and carrier DC levels. The Number of DC carrier levels depends on the number of levels generated. When sinusoidal wave is greater than dc level a pulse is generated at the output. This techniques is beneficial as compared with other modulating technique as it does not require high frequency carrier waveform. The analysis of switches is evaluated with software results. The software results are validated using MATLAB/SIMULINK. The total harmonic distortion (THD) using modulating DC Level shifting technique is found to be 10.41 %.

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