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has been cited by the following article:

• TITLE: Modulation Index Effect on the 5-Level SHE-PWM Voltage Source Inverter

  AUTHORS: Hassan Feshki Farahani, H. Sarabadani

  KEYWORDS: Multilevel Voltage Source Inverter, Selective Harmonic Elimination, Modulation Index, Load Type and PSPICE

  JOURNAL NAME: Engineering, Vol.3 No.2, March 18, 2011

  ABSTRACT: Harmonic content of the voltage source inverters is important and must be in the allowed ranges. Different method are proposed to decrease the Total Harmonic Distortion (THD) and caused to be sinusoidal the output voltage of inverters. One of these methods is using multilevel structure. In this structure many important parameters which are effective on voltage source inverter operation that among them we can mention to modulation index (MI). Variation of modulation index can change the THD. One of the harmonic reduction methods is using multilevel structure. In this paper, a sample 5-level SHE-PWM voltage source inverter is presented and all equation and choosing switching angles for elimination desired harmonics from different order. To investigate the effective parameters on the inverter operation, a typical 5-level inverter is simulated in PSPICE software. The simulation has been done for different values of modulation and its effect on the inverter operation is evaluated.