Asymmetric DC Source Multilevel Inverter


  • Hazwan Hanif Ishak Faculty of Electrical Engineering, Universiti Teknologi Malaysia
  • Shahrin Md Ayob Faculty of Electrical Engineering, Universiti Teknologi Malaysia



asymmetrical multilevel voltage source inverter, harmonic improvement, normal two-level voltage source inverter, power switch voltage stress


An asymmetrical multilevel inverter with harmonic profile improvement and lower voltage stress is presented in this paper. The multilevel inverter is a power electronic circuit that produces sinusoidal output voltage waveform from several levels of dc input voltages, which reduces Electromagnetic Compatibility (EMC) and Total Harmonic Distortion (THD). Four modules are connected in series together with its dc source is configured in asymmetrical configuration to produce 31 output voltage levels. Asymmetrical Multilevel Inverter offers more advantages compared to the conventional multilevel (symmetrical Multilevel Inverter) and the two-level inverters itself. This work focuses on the cascaded multilevel inverter with it dc source configured in asymmetrical configuration. The proposed topology will be developed and simulated in MATLAB/Simulink software package.  For comparison purposes, normal two-level inverter also developed.  The results such as the output voltage, voltage stress across the power switch, the THD content have been analyzed and discussed.


R. A. Krishna and L. P. Suresh, "A brief review on multilevel inverter topologies," 2016 International Conference on Circuit, Power and Computing Technologies (ICCPCT), Nagercoil, 2016, pp. 1-6. doi: 10.1109/ICCPCT.2016.7530373

Daniel W. Hart, “Introduction to Power Electronicâ€, Prentice Hall International Inc., 1997.

Y. C. Jung, J. G. Cho and G. H. Cho, "A new zero voltage switching resonant DC-link inverter with low voltage stress," Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on, Kobe, 1991, pp. 308-313 vol.1.

C.R. Balamurugan, S.P. Natarajan and M. Arumugam, “A Review on Various Multilevel Inverter Topologiesâ€, Global Journal of Advanced Research, Vol-2, Issue-1 PP. 142-153.

S. M. Ayob, C. H. Yee, N. D. Muhamad and A. Jusoh, "A New Hybrid Multilevel Inverter Topology with Harmonics profile improvement," 2005 International Conference on Power Electronics and Drives Systems, Phuket, 2005, pp. 999-1002.




How to Cite

Ishak, H. H., & Md Ayob, S. (2017). Asymmetric DC Source Multilevel Inverter. ELEKTRIKA- Journal of Electrical Engineering, 16(2), 22–25.