GENERATION OF CHAOS-BASED SPWM AND ANALYSIS OF ITS SPECTRAL PROPERTY FOR SUPPRESSION OF HARMONICS

There exists cluster harmonics around the multiples of carrier frequency in conventional sinusoidal pulse width modulation (SPWM) output waves. A new strategy for generation of Chaos-based SPWM (CSPWM) is proposed with the aim of reduction harmonic. A one-dimensional tent map isused to vary the frequencies of the triangular carrier wave so that the harmonics can be distributed continuously and equablyover a wide frequency range. The new proposed CSPWM scheme is applied to a voltage source inverter. Research results show that it is effective on suppression of harmonics, moreover, it is easy to realize by microprocessor.