A Modified Switched Capacitor Multilevel Inverter with Symmetric and Asymmetric Extendable Configurations

Document Type : Research paper


1 Energy Management Research Center, University of Mohaghegh Ardabili, Ardabil, Iran

2 Department of Electrical and Computer Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

3 Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran


Switched capacitor multilevel inverters with low input DC voltage sources and voltage boost capability are very attractive to producing a high voltage levels in the output. The paper introduces a modified switched capacitor multilevel inverter with voltage boost capability. The suggested topology can be extended into symmetric and asymmetric configurations. Nearest-level modulation method is employed to generate high-quality output waveforms. The presented multilevel inverter is compared with the similar configurations by considering various criteria. Finally, to confirm the operation of the suggested topology, a laboratory scale of the suggested inverter is implemented and the results are given.


  1. Nabae, I. Takahashi, and H. Akagi, "A new neutral-pointclamped PWM inverter," IEEE Trans. Ind. Appl., Vol. 5, pp. 518–523, 1981.
  2. K. Chamarthi, A. Al-Durra, T.H. EL-Fouly, and K. Al Jaafari, "A novel three-phase transformerless cascaded multilevel inverter topology for grid-connected solar PV applications," IEEE Trans. Ind. Appl., Vol. 57, No. 3, pp. 2285–2297, 2021.
  3. Isazadeh, J. Adabi, M. Rezanejad, and M.E. Adabi, "Operation and control of a grid-connected asymmetrical cascaded multilevel inverter," IEEE J. Emerging Sel. Top. Power Electron., Vol. 9, No. 2, pp. 1614–1623, 2020.
  4. Panda, B. Das, A. Chakrabarti, P.R. Kasari, A. Bhattacharya, and D. Chatterjee, "A new grid interactive 11-level hybrid inverter topology for medium-voltage application," IEEE Trans. Ind. Appl., Vol. 57, No. 1, pp. 869–881, 2020.
  5. R. Bana, K.P. Panda, R.T. Naayagi, P. Siano, and G.Panda, "Recently developed reduced switch multilevel inverter for renewable energy integration and drives application: topologies, comprehensive analysis and comparative evaluation," IEEE Access, Vol. 7, pp. 54888–54909, 2019.
  6. H. Mondol, M.R. Tür, S.P. Biswas, M.K. Hosain, S. Shuvo, and E. Hossain, "Compact three phase multilevel inverter for low and medium power photovoltaic systems," IEEE Access, Vol. 8, pp. 60824–60837, 2020.
  7. F. Pires, A. Cordeiro,D. Foito, and J.F. Silva, "A multilevel converter topology for a STATCOM system based on four-leg two-level inverters and cascaded scott transformers," IEEE Trans. Power Delivery, Vol. 37, No. 3, pp. 1391–1402, 2021.
  8. Dixon, Pereda, C. Castillo, and S. Bosch, "Asymmetrical multilevel inverter for traction drives using only one DC supply," IEEE Trans. Veh. Technol., Vol. 59, No. 8, pp. 3736–3743, 2010.
  9. Zhang, G. Chen, Y. Hu, C. Gong, and Y. Wang, "Cascaded multilevel inverter based power and signal multiplex transmission for electric vehicles," CES Trans. Electr. Mach. Syst., Vol. 4, No. 2, pp. 123–129, 2020.
  10. Sedaghati, and S.H.L. Majareh, "A multilevel inverter based on cascade connection of submultilevel units with reduced switch count," Int. J. Circuit Theory Appl., Vol. 47, No. 7, pp. 1152–1172, 2019.
  11. Nair, R.S. Kaarthik, A. Kshirsagar, and K. Gopakumar, "Generation of higher number of voltage levels by stacking inverters of lower multilevel structures with low voltage devices for drives," IEEE Trans. Power Electron., Vol. 32, No. 1, pp. 52–59, 2016.
  12. Qanbari, Tousi, M. Farhadi-Kangarlu, "A novel Vectorbased pulse-width modulation for cascaded H-bridge multilevel Inverters," J. Oper. Autom. Power Eng., Vol. 11, No. 2, pp. 113–122, 2023.
  13. Saeedian, S.M. Hosseini, and J. Adabi, "Step-up switchedcapacitor module for cascaded MLI topologies," IET Power Electron., Vol. 11, No. 7, pp. 1286–1296, 2018.
  14. Rodriguez, J.S. Lai, and F.Z. Peng, "Multilevel inverters: a survey of topologies, controls, and applications," IEEE Trans. Ind. Electron., Vol. 49, No. 4, pp. 724–738, 2002.
  15. D. Siddique, S. Mekhilef, A. Sarwar, A. Alam, and N. Mohamed Shah, "Dual asymmetrical dc voltage source based switched capacitor boost multilevel inverter topology," IET Power Electron., Vol. 13, No. 7, pp. 1481–1486, 2020.
  16. Kakar, S.B.M. Ayob, A. Iqbal, N.M. Nordin, M.S.B. Arif, and S. Gore, "New asymmetrical modular multilevel inverter topology with reduced number of switches," IEEE Access, Vol. 9, pp. 27627–27637, 2021.
  17. H. Latifi Majareh, F. Sedaghati, M. Hosseinpour, and S.R. Mousavi-Aghdam, "Design, analysis and implementation of a generalised topology for multilevel inverters with reduced circuit devices," IET Power Electron., Vol. 12, No. 14, pp. 3724–3731, 2019.
  18. Roy, and P.K. Sadhu, "A step-up multilevel inverter topology using novel switched capacitor converters with reduced components," IEEE Trans. Ind. Electron., Vol. 68, No. 1, pp. 236–247, 2020.
  19. S. Lee, C.S. Lim, Y.P. Siwakoti,. and K.B. Lee, "Hybrid 7-level boost active-neutral-point-clamped (H-7L-BANPC) inverter," IEEE Trans. Circuits Syst. II Express Briefs, Vol. 67, No. 10, pp. 2044–2048, 2019.
  20. Zeng, W. Lin, and J. Liu,"Switched-capacitor-based active-neutral-point-clamped seven-level inverter with natural balance and boost ability," IEEE Access, Vol. 7, pp. 126889–126896, 2019.
  21. S. Lee, and K.B. Lee,"Dual-T-type seven-level boost activeneutral-point-clamped inverter," IEEE Trans. Power Electron., Vol. 34, No. 7, pp. 6031–6035, 2019.
  22. Ajaykumar, and N.R. Patne, "Switched-Capacitor-Based Neutral-Point-Clamped Quasi-Switched Boost Multilevel Inverter," Arabian J. Sci. Eng., Vol. 45, No. 3, pp. 1765–1775, 2020.
  23. Gao, W. Zhang, Y. Naderi Zarnaghi, N. Vosoughi Kurdkandi, and C.Zhang, "A new boost switched capacitor seven-level grid-tied inverter," IET Power Electron., Vol. 14, No. 2, pp. 268–279, 2021.
  24. Abdel-Rahim, and H. Wang, "Five-level one-capacitor boost multilevel inverter," IET Power Electron., Vol. 13, No. 11, pp. 2245–2251, 2020.
  25. Liu, X. Zhu, and J. Zeng, Mar,"A seven-level inverter with self-balancing and low-voltage stress," IEEE J. Emerg. Sel. Topics Power Electron., vol. 8, no. 1, pp. 685696, 2020.
  26. Wang, Y. Yuan, G. Li, Y. Ye, K. Wang and J. Liang, May," A T-Type Switched-Capacitor Multilevel Inverter with Low Voltage Stress and Self-Balancing," IEEE Trans. Circuits Syst. I Regul. Pap., vol. 68, no. 5, pp. 2257–2270, 2021.
  27. S. Lee,"Single-stage switched-capacitor module (S3CM) topology for cascaded multilevel inverter," IEEE Trans. Power Electron., vol. 33, no. 10, pp. 8204-–8207, 2020.
  28. Qanbari, B. Tousi, M. Farhadi-Kangarlu, "A Novel VectorBased Pulse-Width Modulation for Three-Phase Two-Level Voltage Source Inverters," J. Oper. Autom. Power Eng., Vol. 11, No. 1, pp. 50–60, 2023.
  29. Vedith, J.N. Bhanu Tej, S. Sampath, M. Usha Sree, P. Nithin Rao, and , K.Neelima," Review on Pulse Width Modulation and Optimization Techniques for Multilevel Inverters," Int. Conf. Artificial Intelli. Sust. Eng., pp. 235–249, 2022.
  30. H.Hosseini, and E.Babaei, "October. A novel modulation method for dc/ac matrix converters under distorted dc supply voltage," IEEE Region 10 Conf. Computers Communi. Cont. Power Eng., TENCOM’02 Proce., Vol. 3, pp. 1970–1973, 2002.
  31. Ajami , M. Mahmoudi , E. Seyfi and F. Atashbahar," Oct A New Topology for UPQC Based on Reduced-Switch-Count Converter," Gazi University J. Scie., vol. 28, no. 3, pp. 405–418, 2015.
  32. J. Sathik, N. Sandeep, and F. Blaabjerg, "High gain active neutral point clamped seven-level self-voltage balancing inverter," IEEE Trans. Circuits Syst. II Express Briefs, Vol. 67, No. 11, pp.2567-2571, 2019.
  33. Liu, J. Wu, and J. Zeng, "Symmetric/asymmetric hybrid multilevel inverters integrating switched-capacitor techniques," IEEE J. Emerging Sel. Top. Power Electron., Vol. 6, No. 3, pp. 1616–1626, 2018.
  34. D. Siddique, S. Mekhilef, S. Padmanaban, M.A. Memon, and C. Kumar, "Single-phase step-up switched-capacitorbased multilevel inverter topology with SHEPWM," IEEE Trans. Ind. App., Vol. 57, No. 3, pp. 3107–3119, 2020.
  35. Majumdar, B. Mahato, and K.C. Jana, "Analysis and implementation of a generalised switched-capacitor multilevel inverter having the lower total standing voltage," IET Power Electron., Vol. 13, No. 17, pp. 4031–4042, 2020.
  36. Sun, B. Wang, Y. Zhou, W. Wang, H. Du, and Z. Lu, "A single DC source cascaded seven-level inverter integrating switched-capacitor techniques," IEEE Tran. Ind. Electron., Vol. 63, No. 11, pp. 7184–7194, 2016.

Articles in Press, Corrected Proof
Available Online from 11 January 2023
  • Receive Date: 13 September 2022
  • Revise Date: 07 November 2022
  • Accept Date: 23 December 2022