Progressive change of chaotic PWM patterns in DC-AC random PWM schemes using weighted switching decision

This paper shows that random PWM (RPWM) schemes are in fact chaotic in nature and that the degree of chaos can be manipulated in order to improve the spectral performance of the RPWM method for DC-AC power conversion. An improved RPWM method which involves a weighted switching decision process for controlling the degree of chaos in RPWM is described. With an appropriately added deterministic nature, progressive change of such chaotic behaviour in RPWM schemes caused by the weighted process is demonstrated in a qualitative manner