Title :
Optimizing losses in multilevel inverters
Author :
Valderrama-Blavi, H. ; Mart?nez-Salamero, L. ; Maix?©, J. ; Vidal-Idiarte, E. ; Alonso, C.
Author_Institution :
Departament d´´Enginyeria Electronica, Electrica i Automatica, Rovira i Virgili Univ., Tarragona, Spain
Abstract :
Losses generation in a multilevel inverter leg are analyzed in this paper for N=2, 3, 4, and 5 levels. An N-level inverter is modeled as the superposition of N-1 elementary buck converters to simplify the losses analysis. The results of the analysis show that the efficiency of a multilevel inverter can increase when the number of levels increases if an appropriate device selection is made. SABER simulations and experimental results in a 500 W 5-level prototype confirm the analytic predictions.
Keywords :
circuit simulation; invertors; losses; 5-level inverter; 500 W; SABER simulations; buck converters; losses analysis; losses optimisation; multilevel inverters; Analytical models; Circuits; Predictive models; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Switching converters; Switching frequency; Switching loss; Voltage;
Conference_Titel :
IECON 02 [Industrial Electronics Society, IEEE 2002 28th Annual Conference of the]
Print_ISBN :
0-7803-7474-6
DOI :
10.1109/IECON.2002.1187618