Generation of New Random PWM Pulse for Buck Boost Converter Using LabVIEW
This paper addresses random pulse width modulation (RPWM) and its applications to the power electronic converters. RPWM differentiate from conventional PWM, which produces switching functions that have non deterministic variables. This paper presents new RPWM scheme developed with the help of virtual Instrumentation (VI) software. The comparative investigations of proposed RPWM scheme against the normal PWM for the buck boost converter is presented. The effectiveness of randomization on spreading the dominating frequencies that normally exist in constant frequency PWM schemes is evaluated by the power spectral density (PSD) estimations in the low-frequency range.