An improved single-phase asymmetrical multilevel inverter structure with reduced number of switches and higher power quality
Document Type
Article
Publication Date
6-1-2021
Abstract
This brief proposes an improved single-phase multilevel inverter with asymmetrical structure, consisting of ten unidirectional SiC MOSFET switches and four direct current (DC) voltage sources to produce a twenty-one voltage levels alternating current (AC). The main advantages of the proposed multilevel inverter are the simplicity and the high output power quality. The output power quality is achieved by calculating the switching angles using the half-height (HH) method, thus overcoming the problems associated with total harmonic distortion (THD) and reducing the conduction losses. Furthermore, the switching losses are reduced by using SiC MOSFET's high performance characteristics compared to their Si counterparts. To demonstrate the effectiveness of the proposed 21-level inverter, simulations using MATLAB/SIMULINK and PLECS softwares are carried out. Moreover, an experimental prototype of the inverter controlled by a C2000 Delfino-TMS320F28379D embedded board is realized to validate the results. The results indicates that THD of voltage and current are minimal, 4.2 %, and 0.3 %, respectively. The proposed multilevel inverter can be used for many applications due to its low density, low-cost and conforms to international IEEE-1547 and IEC-61727 standards.
Keywords
Topology, Switches, Capacitors, Silicon carbide, MOSFET, Through-silicon vias, Switching loss, Power electronic converter, Multilevel inverter, Reduced number of switches, C2000 microcontroller
Divisions
fac_eng
Funders
University of Chlef, Algeria,Ministry of Higher Education, Malaysia through Large Research Grant Scheme (LRGS/1/2019/UKM/01/6/3),University of Malaya, Malaysia, through RU-SATU Joint Research 2020 (ST009-2020)
Publication Title
IEEE Transactions on Circuits and Systems II: Express Briefs
Volume
68
Issue
6
Publisher
Institute of Electrical and Electronics Engineers
Publisher Location
445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA