Investigation of the effect of the gap at the zero-crossing point of PWMs creating the first level voltage in a multi-level inverter

Can E., Sayan H. H.

Journal of Engineering Research (Kuwait), cilt.11, sa.3, ss.157-168, 2023 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 11 Sayı: 3
  • Basım Tarihi: 2023
  • Doi Numarası: 10.36909/jer.15941
  • Dergi Adı: Journal of Engineering Research (Kuwait)
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Arab World Research Source, Directory of Open Access Journals
  • Sayfa Sayıları: ss.157-168
  • Anahtar Kelimeler: Different First-Level, PWM Operating, Zero-Point Grossing
  • Erzincan Binali Yıldırım Üniversitesi Adresli: Evet

Özet

The usage of multi-level inverters in converting direct current to alternating current is one of the most demanded and used methods. While creating multi-level voltage with inverters, the operating times of the switches that constitute the first step of the alternating voltage determine the gap of the step at the zero-crossing point. This situation can be preferred to create an extra level. Therefore, this article examines the effect of variation in operating times and frequencies of first-step PWMs on this zero-crossing point. First, the inverter structure providing load voltage is given in the study. Then, the transition of PWM run times is tried for different first-level voltages on the loads. The results obtained show the operation times of PWM at the transition point are quite effective on the load currents and voltages.