TY - JOUR
T1 - A New Modular Multilevel Inverter Based on Step-Up Switched-Capacitor Modules
AU - Khodaparast, Aryorad
AU - Azimi, Erfan
AU - Azimi, Ali
AU - Ebrahim Adabi , M.
AU - Adabi, Jafar
AU - Pouresmaeil, Edris
PY - 2019
Y1 - 2019
N2 - A new structure of switched capacitor multilevel inverter (SCMLI) capable of voltage boosting and with self-balancing ability is introduced in this article. This advantage is the result of a step by step rise of capacitor voltages in each module, supplied by just one DC voltage source. The proposed topology generates a sinusoidal output waveform with a magnitude several times greater than the input one. Higher output staircase AC voltage is obtained by applying a nearest level control (NLC) modulation technique. The most significant features of this configuration can be mentioned as: fewer semiconductor devices, remarkably low total harmonic distortion (THD), desirable operating under high/low frequency, high efficiency, inherent bipolar voltage production, easy circuit expansion, ease of control and size reduction of the circuit thanks to utilizing neither bulky transformer nor inductor. Moreover, the proposed SCMLI is comprehensively surveyed through theoretical investigation and a comparison of its effectiveness to recent topologies. Eventually, the operating principle of a 25-level prototype of the suggested SCMLI is validated by simulation in the MATLAB SIMULINK environment and experimental results.
AB - A new structure of switched capacitor multilevel inverter (SCMLI) capable of voltage boosting and with self-balancing ability is introduced in this article. This advantage is the result of a step by step rise of capacitor voltages in each module, supplied by just one DC voltage source. The proposed topology generates a sinusoidal output waveform with a magnitude several times greater than the input one. Higher output staircase AC voltage is obtained by applying a nearest level control (NLC) modulation technique. The most significant features of this configuration can be mentioned as: fewer semiconductor devices, remarkably low total harmonic distortion (THD), desirable operating under high/low frequency, high efficiency, inherent bipolar voltage production, easy circuit expansion, ease of control and size reduction of the circuit thanks to utilizing neither bulky transformer nor inductor. Moreover, the proposed SCMLI is comprehensively surveyed through theoretical investigation and a comparison of its effectiveness to recent topologies. Eventually, the operating principle of a 25-level prototype of the suggested SCMLI is validated by simulation in the MATLAB SIMULINK environment and experimental results.
KW - Multilevel inverter
KW - Self-balancing
KW - Single-source converter
KW - Step-up converter
KW - Switched-capacitor
UR - http://www.scopus.com/inward/record.url?scp=85061901498&partnerID=8YFLogxK
U2 - 10.3390/en12030524
DO - 10.3390/en12030524
M3 - Article
AN - SCOPUS:85061901498
SN - 1996-1073
VL - 12
SP - 1
EP - 16
JO - Energies
JF - Energies
IS - 3
M1 - 524
ER -
