FPGA Implementation of 5-level Neutral Point Clamp Inverter

Hataş H., Silahtar O., Zabun M., Almalı M. N., Atan Ö.

1 st International Conference on Modern and Advanced Research, Konya, Türkiye, 29 - 31 Temmuz 2023, cilt.1, sa.1, ss.407-412

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Doi Numarası: 10.59287/icmar.1320
  • Basıldığı Şehir: Konya
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.407-412
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

Since multilevel inverters have complex switching schemes, it is an important requirement to

generate fast and easy switching signals. FPGA has the feature of fast and parallel operation and has been

widely used in the field of power electronics in recent years. In this study, a fast signal generation of

Sinusoidal Pulse Width Modulation (SPWM) technique using Field Programmable Gate Array (FPGA)

for 5-level single-phase Neutral Point Multilevel Inverter (NPC-MLI) is described. In the study, the

analysis and simulation of the NPC-MLI topology was carried out in the MATLAB/Simulink

environment. The control algorithm for the switching components in the NPC-MLI topology is created

with XSG block sets in the MATLAB/Simulink environment. The SPWM technique, which is common in

literature, was used as the control algorithm and the basic principles of the SPWM technique were

mentioned in detail. In the experimental study, the control algorithm created in the MATLAB/Simulink

environment was automatically converted to HDL code, run in VIVADO software and embedded in the

FPGA environment. Both simulation and experimental measurements of the signals used to drive the

switching components in the NPC-MLI topology are shown. In the simulation study, a load is connected

to the output voltage of the NPC-MLI topology and analyzed both with filter and without filter. While the

Total Harmonic Distortion (THD) value was 27.06% without filter, it was observed that the THD value

was 1.24% with filter. As a result of the simulation and experimental studies, it has been seen that the

SPWM method has been successfully implemented in the FPGA environment for the 5-level single-phase

NPC-MLI topology. In conclusion, this study shows that the FPGA-based SPWM method can be used

effectively for the generation of fast switching signals of multilevel inverters, which is an important

application in the field of power electronics.