We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Time-domain characterisation of multicarrier-based digital SPWM of multilevel VSI.
- Authors
Kumar, Mayank; Gupta, Rajesh
- Abstract
The effect of sampling frequency on digital sinusoidal pulse width modulated (SPWM) output of phase-shifted carrier-based multilevel voltage source inverter (VSI) and the characteristics of output voltage and load current has been discussed here. The generalised equation of digitally controlled phase-shifted carrier-based multilevel VSI output voltage is derived using double Fourier integral solution. The Jacobi–Anger expansion has been used to obtain the integral solution. Time-domain analysis has been used to establish the relation between sampling frequency, carrier frequency, and fundamental frequency, at different modulation indices for n-level VSI. The load current of VSI is stepped in nature due to stepped variation in the output of the digital SPWM. Therefore, the low-frequency harmonic components closer to the fundamental frequency appear in the frequency spectrum. The variation of total harmonic distortion with respect to multisampling factor (sampling to carrier frequency ratio) has been discussed at different modulation indices for multicarrier-based multilevel inverter. The analytical results are verified through simulation and laboratory experimental results.
- Subjects
ELECTRIC inverters; IDEAL sources (Electric circuits); ELECTRICAL load; FOURIER integrals; PULSE width modulation
- Publication
IET Power Electronics (Wiley-Blackwell), 2018, Vol 11, Issue 1, p100
- ISSN
1755-4535
- Publication type
Article
- DOI
10.1049/iet-pel.2017.0078