Open AccessA step‐up switched‐capacitor multilevel inverter based on 5‐level T‐type modules
Author(s) -
Khodaparast Aryorad,
Adabi Jafar,
Rezanejad Mohammad
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5805
Subject(s) - total harmonic distortion , capacitor , transformer , voltage , waveform , inverter , topology (electrical circuits) , switched capacitor , electronic engineering , electrical engineering , computer science , engineering
The paper presents a new transformer‐less step‐up multilevel inverter structure with a single DC source. The concept was based on cascaded connection of bipolar T‐type 5‐level modules. Proper charging and discharging of capacitors across the load in prearranged time durations would make a nearly sinusoidal staircase voltage. The output voltage amplitude was several times greater than the DC input depending on the number of modules and charging mode of the capacitors. Multiplying the input voltage, self‐balancing, generating bipolar voltage waveform, easy circuit expansion and considerably low THD (Total Harmonic Distortion) were found to be the advantages of the proposed topology. The paper also adds operating principle, simulation and experimental results of a 29‐level prototype based on the presented inverter structure.