Spectral analysis of switch voltage for dual randomized PWM DC-DC converters operating in DCM

Boudouda, Aimad; Bouzida, Ahcene; Nafa, Fares

doi:10.1080/21681724.2020.1870717

Cited by 3 publications

(4 citation statements)

References 22 publications

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“…It allows spreading the output voltage harmonics over a continuous noise spectrum with small amplitudes without increasing the switching frequency. This provides several advantages, such as improved compliance with EMC restrictions [11,12,15]. The dual randomized discontinuous PWM technique, a new solution, is proposed to conserve the advantages of DPWM while adding those of the RPWM technique.…”

Section: Dual Randomized Discontinuous Pwmmentioning

confidence: 99%

“…It gives very satisfactory results compared to analytical and measurement ones [1,11,12,15]. Welch's method is the core function of most digital signal analyzers (DSA).…”

Section: Estimated Power Spectral Density Based On Welch Approximationmentioning

confidence: 99%

“…The existing simple random schemes that use only one random parameter are randomized carrier frequency modulation (RCFM) and randomized pulse position modulation (RPPM) [1][2][3][5][6][7][8]. However, for a maximum spreading of the voltage spectrum, the combination of the two schemes (RCFM-RPPM) has also been proposed [1,[9][10][11][12][13][14][15]. Most published works on random PWM techniques are based on continuous PWM.…”

Section: Introductionmentioning

confidence: 99%

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Power Spectral Density of Dual Randomized Discontinuous Pulse Width Modulation

Boudouda

2023

RRST-EE

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This paper addresses the spectral characteristics of a carrier-based dual randomized discontinuous pulse width modulation (DRDPWM) technique for reducing conducted EMI and switching losses in three-phase voltage source inverters. It combines two simple random schemes, random carrier frequency modulation (RCF-DPWM) and random pulse position modulation (RPP-DPWM). First, the modulating principle of the DRDPWM is presented. Then, the analytical expressions of power spectral density (PSD) that characterize the output voltage of the three-phase inverter are derived. Analytical and simulation results show the effectiveness of PSD spreading of the DRDPWM. Finally, experimental results verify the analytical and simulation results and prove the effectiveness of the DRDPWM scheme in spreading the spectrum compared to simple schemes (RPP-DPWM and RCF-DPWM) and conventional scheme DPWM.

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Section: Dual Randomized Discontinuous Pwmmentioning

confidence: 99%

“…It gives very satisfactory results compared to analytical and measurement ones [1,11,12,15]. Welch's method is the core function of most digital signal analyzers (DSA).…”

Section: Estimated Power Spectral Density Based On Welch Approximationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Power Spectral Density of Dual Randomized Discontinuous Pulse Width Modulation

Boudouda

2023

RRST-EE

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“…The converter under study is schematized in Figure 1; it requires one switching signal q. It can operate in CCM and DCM [3,[16][17][18][19].…”

Section: Modulating Principlementioning

confidence: 99%

Analysis of output voltage ripple for dual randomized PWM buck converter operating in continuous and discontinuous conduction modes

2022

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Dual Randomized Pulse Width Modulation (DRPWM) is renowned for its better effectiveness than Simple Randomized Pulse Width Modulation (SRPWM) in reducing conducted Electro-Magnetic Interferences (EMI) in power converters. However, the introduction of low-frequency ripples into the output voltage by dual randomization has not yet been addressed; this effect is investigated in this paper for a buck converter operating in both the continuous conduction mode (CCM) and the discontinuous conduction mode (DCM). First, the modulating principle is presented. Then, a general analytical expression for power spectral density (PSD) of the input current is derived and validated for the proposed DRPWM scheme for both the CCM and DCM. A comparison of the PSDs of the input current for all RPWM schemes in both the CCM and DCM shows the PSD spreading effectiveness of the dual scheme as compared to simple schemes. Finally, the low-frequency output ripple is analysed using the PSD of output voltage. The results reveal that the output voltage ripple is affected by all the randomized schemes in both the CCM and the DCM. Also, the dual scheme (RCFM-RPPM) introduces the highest low-frequency voltage ripple, especially in the CCM and for low duty cycles. In DCM, the RPPM scheme gives the lowest voltage ripple, while the RCFM scheme gives the lowest voltage ripple in the CCM. The results are confirmed by both theory and simulations.

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Dual randomized discontinuous pulse width modulation for three-phase inverter

Boudouda

2023

International Journal of Electronics

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Spectral analysis of switch voltage for dual randomized PWM DC-DC converters operating in DCM

Cited by 3 publications

References 22 publications

Power Spectral Density of Dual Randomized Discontinuous Pulse Width Modulation

Power Spectral Density of Dual Randomized Discontinuous Pulse Width Modulation

Analysis of output voltage ripple for dual randomized PWM buck converter operating in continuous and discontinuous conduction modes

Dual randomized discontinuous pulse width modulation for three-phase inverter

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