A New 5L SC-Based Boosting Inverter with Reduced Spike Current

Abstract

The drawbacks of conventional multi-level inverters (MLIs) include insufficient boost capacity, unbalanced capacitor voltage, and complicated regulation. This research presents a 5-level (5-L) switched capacitor (SC) boost inverter for single-phase applications as a solution to the aforementioned problems. The 5-L inverter is well-suited for renewable energy generation since it can produce five output levels with two voltage gains and maintain a natural balance in capacitor voltages with only seven switches. However, the SC inverter’s large current spikes could harm capacitors, switches, and DC sources. The suggested inverter’s charging loop incorporates an inductor to mitigate this issue by smoothing out voltage fluctuations and current spikes. The simulation and experiment findings presented here prove that the proposed system works and performs as expected.

Keywords:

• Quasi-Resonant
• SCI
• MLI
• soft-charging

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Ashutosh Kumar Singh

Ashutosh Kumar Singh received the B.Tech. degrees in electrical and electronics engineering from Motihari College of Engineering, Motihari, in 2016 and the M.Tech. degrees in electrical engineering from the National Institute of Technology Patna, in 2019. He has completed his PhD from NIT Patna in 2023. His research interests are switched capacitor power electronic converters, multilevel inverters, SMPS power supplies, PFC, LLC, and DC-DC converters. Email: [email protected]

Rajib Kumar Mandal

Rajib Kumar Mandal received his BE from MACT (REC), Bhopal in 1999, and ME from Jadavpur University in 2004. He has completed his PhD from NIT Patna in 2018. He is presently working as an Associate Professor and HOD in the Department of Electrical Engineering, NIT Patna. Email: [email protected]

Ravi Anand

Ravi Anand received her B Tech in Electrical engineering from NIET, Greater Noida in 2017, and M Tech in Control System engineering from NIT Patna, in 2021. She is currently pursuing Ph.D from NIT Patna. Her research interests include multilevel inverters, and grid integrated distributed generation. Email: [email protected]