Sirisukprasert, Siriroj2014-03-142014-03-141999-09-15etd-100899-000251http://hdl.handle.net/10919/35333The concept of multilevel voltage source inverters and their modulation topologies are described. The concept of the Optimized Harmonic Stepped-Waveform (OHSW) technique for a multilevel inverter is presented. By applying this concept, specific harmonics can be eliminated, and the output voltage THD can be improved. A procedure to achieve the appropriate switching angles of the OHSW is proposed. Experimental results are presented to verify the concept. The proposed OHSW technique is implemented on a multilevel inverter using cascaded-inverter with separated dc sources. Comparison between the Selective Harmonic Eliminated PWM and the OHSW is also presented.In Copyrightmultilevel inverterinverterharmonicsThesishttp://scholar.lib.vt.edu/theses/available/etd-100899-000251/