Open AccessSwitched capacitors 9‐level module (SC9LM) with reduced device count for multilevel DC to AC power conversion
Author(s) -
Bhatnagar Pallavee,
Agrawal Rekha,
Kumar Dewangan Niraj,
Jain Sanjay K.,
Kumar Gupta Krishna
Publication year - 2019
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2019.0053
Subject(s) - capacitor , voltage , electrical engineering , power (physics) , switched capacitor , electronic engineering , topology (electrical circuits) , computer science , engineering , physics , quantum mechanics
Switched capacitors (SCs)‐based modules are being increasingly used for multilevel DC to AC power conversion, especially for low input voltage applications. Many of these topologies operate in two stages involving H‐bridge switches, which endure high‐voltage stress. The SC 9‐level module (SC9LM) presented here operates in a single stage with one DC source and two capacitors. In addition, the peak inverse voltage of all power switches is confined to the voltage of the input DC source. The proposed 9‐level module ensures a reduced number of power switches. In addition, with appropriate utilisation of states, two of the eleven switches in the module operate at fundamental switching frequency, thereby minimising the switching losses. A single SC9LM achieves a voltage gain of two. The proposed module is validated through circuit analysis followed by simulation and experimental results.