Simulation of a Single Phase Inverter with Unipolar Voltage Switching Using Sinusoidal Pulse Width Modulation (SPWM) Technique


  • Akuhwa T David Federal University of Agriculture Makurdi, Nigeria
  • Tingir T. James Federal University of Agriculture Makurdi, Nigeria
  • Peter A. Akor Federal University of Agriculture Makurdi, Nigeria



Inverter, THD, SPWM, Matlab, Simulink, H-bridge


 The choice of the switching techniques used is key to good inverter performance, as it could offer reduced switching losses, generate less EMI, reduce filter size and offer better THD performance. To improve inverter performance these factors must be put into consideration. This Paper presents the Modelling, and Simulation of Single Phase Sinusoidal pulse Width Modulation (SPWM) Inverter With Unipolar Voltage Switching using the SIMULINK toolbox of MATLAB software. In this switching scheme, the high-frequency triangular carrier wave is compared with two sinusoidal modulating signals having the same amplitude and a frequency of 50Hz. The two sinusoids are  180° out of phase. The output is used to switch the two legs of the H-bridge inverter in a complementary fashion. The results obtained from the simulation show an output with the fundamental voltage of 283.4 V at the frequency of 50Hz and a total harmonic distortion (THD) of 64.42 % when the filter was not applied. However, with the incorporation of LC filter the THD was further reduced to 2.7% at the fundamental voltage of 236.6 V. However, Without output voltage feedback control, change in load resistance from 10 Ω to 50 Ω marginally increased the fundamental voltage and percentage THD up to 239.5 V and 4.22%. The experimental setup also presents similar waveforms.


Maria D, Tzong S, Aristide T, Javad M. (1998). " A Review of Soft-switched DC-AC Converter," IEEE trans. On Industry Appl, 43(4) pp 847-858,

Wang, S (2006). Research of Novel Three-phase Inverter and its Modulation Technique” International Nature and Science, 4(3), 2006

Tolbert L. (2008). Multilevel converter as a unity interface for renewable energy system. IEEE proceedings, Power Engineering Society Summer Meeting, Seattle pp 1271-1274

Anas, M. (2014). Performance analysis of single phase inveretr” International Journal Of Modern Engineering Research. (4) 4: 1-7

Ismail, (2006). Development of a Single Phase SPWM Microcontroler -Based Inverter. First International Power and Energy Conference PEC. Putra jaya, Malaysia: IEEE pp 437

Abdelazin, S. (2014). Intelligent UPS inverter control design using microcontroller. Journal of Energy Technologies and Policy. 4 (2): 34-47

Pacheco M. ( 2005). An online UPS System with power factor correction and output voltage stabilization, IEEETrans. Power Electron. 20( 5): pp. 1109–1117

Nazmul, I.R. (2012). Sinusoidal PWM Signal Generation Technique for Three Phase Voltage Source Inverter with Analog Circuit & Simulation of PWM Inverter for Standalone Load & Micro-grid System’’. International Journal Of Renewable Energy Research. 3 (3)

Samier I.A (2014). Performance analysis of SPWM and SVPWM inverters Fed induction Motor. International journal of computer applications ISSN 0975-8887 Vol 4 No5 January 2014.


How to Cite

Akuhwa T David, Tingir T. James, & Peter A. Akor. (2022). Simulation of a Single Phase Inverter with Unipolar Voltage Switching Using Sinusoidal Pulse Width Modulation (SPWM) Technique. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, 8(1), 1–10.