Title :
A new multilevel PWM method: a theoretical analysis
Author :
Carrara, Giuseppe ; Gardella, Simone ; Marchesoni, Mario ; Salutari, Raffaele ; Sciutto, Giuseppe
Author_Institution :
Dept. of Electr. Syst. & Autom., Pisa Univ., Italy
fDate :
7/1/1992 12:00:00 AM
Abstract :
Generalization of the pulsewidth modulation (PWM) subharmonic method to control single-phase or three-phase multilevel voltage source inverters (VSI) is considered. An analytical expression of the spectral components of the output waveforms covering all the operating conditions is derived. The analysis is based on an extension of Bennet´s method. The improvements in harmonic spectrum are pointed out, and several examples are presented, which prove the validity of the multilevel modulation
Keywords :
invertors; pulse width modulation; 3-phase multilevel voltage source invertors; Bennet´s method; harmonic spectrum; invertor control; multilevel PWM method; single-phase invertors; Electric variables control; Frequency; Interference; Magnetic losses; Power semiconductor switches; Power system harmonics; Pulse width modulation; Pulse width modulation inverters; Shape control; Voltage control;
Journal_Title :
Power Electronics, IEEE Transactions on
