Regular-sampled harmonic eliminationPWM control of single-phase two-level inverters

A new harmonic elimination/minimisation pulse width modulation strategy for single-phase inverters is presented. The two-level harmonic elimination pulse width modulation strategy operates online and in real-time and closely approximates the switching angles produced by the offline exact harmonic elimination pulse width modulation technique. The new technique, based on the well-known regular-sampled approach, is suitable for implementation using a low-cost digital signal processor. Theoretical and experimental results are presented to demonstrate and confirm the validity of the new technique.