Abstract: Randomized modulation is of increasing interest in power

electronics and also holds promise for reducing filtering requirements

in ac/ac, dc/dc converter application and reducing acoustic noise in

motor drive applications. This paper deals with the power spectrum

density (PSD) estimation methods of the random controlled pulse

width modulation (RPWM) single-phase structured boost rectifier.

Estimated PSD is also experimentally verified. The switch-mode

operation of the converter results in Electromagnetic Interference

(EMI) which is produced due to large di/dt and dv/dt. In addition to

all steps to minimize the generation of EM1 (i.e. introduction of

RPWM), improvement of power spectra will also be considered.