16.16.210.476 by the Polish Ministry of Science and Larger Education is kindly
16.16.210.476 by the Polish Ministry of Science and Larger Education is kindly acknowledged. Institutional Overview Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: Not applicable. Acknowledgments: The analysis was partially supported by the PL grid infrastructure, readily available at the CYFRONET AGH Academic Laptop Center. Conflicts of Interest: The authors declare no conflict of interest.
energiesArticleSymmetrical Cascaded Switched-Capacitor Multilevel Inverter Primarily based on Hybrid Pulse Width ModulationLingling Cao 1 , Jiefeng Lin 1 , Shikai Chen two and Yuanmao Ye two, College of Mechanical Engineering and Automation, Harbin Institute of Technologies, Shenzhen 518055, China; [email protected] (L.C.); [email protected] (J.L.) School of Automation, Guangdong University of Technologies, Guangzhou 510006, China; [email protected] Correspondence: [email protected]: Multilevel inverters have been widely applied in a variety of industrial applications such as renewable power generation and C2 Ceramide Formula electric autos. An enhanced circuit of symmetrical cascaded switched-capacitor multilevel inverter is proposed so that the reactive energy is absorbed by its energy provide as opposed to capacitors. Then, a special hybrid pulse width modulation technique combing levelshifted pulse width modulation (LS-PWM) and phase-shifted pulse width modulation (PS-PWM) was developed for the inverter. With this modulation algorithm, the energy in between cascaded units is automatically balanced, plus the voltage in the capacitor in every single unit is also automatically balanced for the dc input voltage. Moreover, the optimized capacitor voltage ripple tends to make it probable to work with a smaller capacitor to produce a much better output voltage waveform. Theoretical analysis, simulation and experimental outcomes show that the equivalent switching frequency on the cascaded multilevel inverter is twice the original frequency in order that the output voltage harmonics are only distributed close to even multiples from the carrier frequency.Citation: Cao, L.; Lin, J.; Chen, S.; Ye, Y. Symmetrical Cascaded Switched-Capacitor Multilevel Inverter Based on Hybrid Pulse Width Modulation. Energies 2021, 14, 7643. https://doi.org/10.3390/ en14227643 Academic Editor: Md Rasheduzzaman Received: 12 October 2021 Accepted: 11 November 2021 Published: 15 NovemberKeywords: cascaded multilevel inverter; switched-capacitor; PWM modulation; reactive power1. Introduction AS-0141 Biological Activity Lately, multilevel inverters have already been extensively used in photovoltaic power generation, energy vehicles and higher voltage DC (HVDC) transmission due to the fact it not merely offers the advantage of low voltage stress across switching devices on the occasion of high voltage application but in addition generates a sinusoidal output waveform with lowered harmonic distortion at low switching frequency [1,2]. Generally, multilevel inverters could be categorized into 3 sorts: diode-clamped, capacitor-clamped, and cascaded H-bridge. One particular dc voltage source is equipped in the diodeclamped and capacitor-clamped multilevel inverter, which utilizes diodes or capacitors to divide the dc supply voltage into several voltage levels. A big quantity of power switches, complex switching tactics and capacitor voltage balancing control are required for the clamped-type multilevel inverter [3]. Around the other side, the cascaded H-bridge multilevel inverter has less switch voltage anxiety, and it is easy to comprehend the modular style. However, multipl.