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http://dx.doi.org/10.5370/JEET.2013.8.6.1328

A New Topology of Multilevel Voltage Source Inverter to Minimize the Number of Circuit Devices and Maximize the Number of Output Voltage Levels  

Ajami, Ali (Dept. of Electrical Engineering, Azarbaijan Shahid Madani University)
Mokhberdoran, Ataollah (Dept. of Electrical Engineering, Azarbaijan Shahid Madani University)
Oskuee, Mohammad Reza Jannati (Dept. of Electrical Engineering, Azarbaijan Shahid Madani University)
Publication Information
Journal of Electrical Engineering and Technology / v.8, no.6, 2013 , pp. 1328-1336 More about this Journal
Abstract
Nowadays multilevel inverters are developing generally due to reduced voltage stress on power switches and low total harmonic distortion (THD) in output voltage. However, for increasing the output voltage levels the number of circuit devices are increased and it results in increasing the cost of converter. In this paper, a novel multilevel inverter is proposed. The suggested topology uses less number of power switches and related gate drive circuits to generate the same level in output voltage with comparison to traditional cascaded multilevel inverter. With the proposed topology all levels in output voltage can be realized. As an illustration, a symmetric 13-level and asymmetric 29-level proposed inverters have been simulated and implemented. The total peak inverse (PIV) and power losses of presented inverter are calculated and compared with conventional cascaded multilevel inverter. The presented analyses show that the power losses in the suggested multilevel inverter are less than the traditional inverters. Presented simulation and experimental results demonstrate the feasibility and applicability of the proposed inverter to obtain the maximum number of levels with less number of switches.
Keywords
Multilevel inverter; Cascaded multilevel inverter; Reduced number of switches; Low total harmonic distortion; PIV;
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