A new boost type single source seven-level switched-capacitor based inverter with reduced current stress over the components. (July 2022)

• Record Type: Journal Article
• Authors: Shahsavar, Tala Hemmati; Babaei, Ebrahim; Sabahi, Mehran; khoshkbar-Sadigh, Arash
• Is Part Of: Computers & electrical engineering. Volume 101(2022)
• Publication Date: 2022-07
• Subjects: Multilevel inverter -- Switched-capacitor-based inverter -- Inrush currents -- Voltage boosting capability -- Grid-connected inverters -- Leakage current -- Transformer-less inverter; Computer engineering -- Periodicals; Electrical engineering -- Periodicals; Electrical engineering -- Data processing -- Periodicals; Ordinateurs -- Conception et construction -- Périodiques; Électrotechnique -- Périodiques; Électrotechnique -- Informatique -- Périodiques; Computer engineering; Electrical engineering; Electrical engineering -- Data processing; Periodicals; Electronic journals; 621.302854
• DOI: 10.1016/j.compeleceng.2022.108160
• Languages: English
• ISSNs: 0045-7906

Abstract

Abstract: This paper proposes a new single-phase seven-level inverter. The proposed multilevel inverter is based on a Switch-Capacitor (SC) cell and it has the capability to boost the output voltage. This achievement is obtained by a single input voltage source. The main shortcoming of SC networks is the inrush currents passing through the capacitors while being charged. The proposed multilevel inverter overcomes this problem by using a charging-inductor that charges the utilized capacitor smoothly. The performance of the proposed multilevel inverter is described in different operational modes. The power losses of the used components are analyzed. Design guidance to find optimal values of passive components is given. Comparison is also performed between the proposed multilevel inverter and several conventional seven-level inverters. The proposed multilevel inverter is simulated in MATLAB/Simulink environment under grid-tied transformer-less operation. The experimental 210 VA prototype confirms the correctness of the given theories and the correct operation of the proposed topology.