Browsing by Author "Boudjerda, Nasserdine"

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Combined random space vector modulation for a variable speed drive using induction motor
(Springer, 2015) Boudouda, Aimad; Boudjerda, Nasserdine; El Khamlichi Drissi, Khalil; Kerroum, Kamal
and analyzed in steady-state characteristics of the motor B Aimad Boudouda aimad.boudouda@gmail.com Nasserdine Boudjerda n_boudjerda@yahoo.fr Khalil El Khamlichi Drissi drissi@lasmea.univ-bpclermont.fr Kamal Kerroum Kamal.KERROUM@lasmea.univ-bpclermont.fr 1 Department of Electrical Engineering, University Mohamed Seddik Ben Yahia, Jijel, Algeria 2 Pascal Institute, Blaise Pascal University, Clermont Ferrand, France in closed loop, which is advantageous in reducing acoustic noise
A randomized carrier-based discontinuous pulse width modulation strategy for neutral point clamped three-level inverter
(Publishing House of the Romanian Academy, 2024) Boudouda, Aimad; Aibeche, Abderrezak; Bouzida, Ahcene; Boudjerda, Nasserdine
This article introduces a novel approach called randomized carrier-based discontinuous pulse width modulation (RCDPWM) to address the challenge of mitigating both low-order and high-order harmonics concentrated at the switching frequency and its integer multiples in the output voltage and current of a three-level inverter. The proposed strategy reduces switching losses and a wide dispersion of voltage and current harmonics with significantly smaller amplitudes by integrating features from discontinuous and randomized PWM methods. This characteristic proves beneficial for enhancing efficiency and electromagnetic compatibility. The RCDPWM strategy involves three schemes: two simple schemes (one random parameter), randomized pulse position modulation (RPP-DPWM) and randomized carrier frequency modulation (RCF-DPWM), and a dual scheme combining the two previous ones (RPPRCF-DPWM). Power spectral density (PSD) is used to assess the effectiveness of the proposed strategy in quantitatively analyzing the harmonic dispersion degree. The results demonstrate that the proposed RCDPWM strategy significantly expands harmonic clusters around the switching frequency, reducing its intensity. The spectrum analysis revealed that the RPPRCF-DPWM scheme is the most effective in spreading the output voltage and current spectrum compared to simple schemes (RPP-DPWM and RCF-DPWM).
Spread spectrum in three-phase inverter by an optimised dual randomised PWM technique
(2014) Boudjerda, Nasserdine; Boudouda, Aimad; Melit, Mohammed; Nekhoul, Bachir; El Khamlichi Drissi, Khalil; Kerroum, Kamal
Randomised pulse width modulation (RPWM) technique has become a viable alternative to deterministic pulse width modulation (DPWM). By spreading the power spectrum in a continuous noise, this new technique better complies with electromagnetic compatibility (EMC) requirements for conducted electromagnetic interferences (EMI) and allows reducing the emitted acoustic noise in variable speed drives (VSDs). The most popular RPWM schemes are randomised pulse position modulation (RPPM) and randomised carrier frequency modulation (RCFM). The combination (RCFM-RPPM) or dual RPWM (DRPWM) has also been proposed. In this article, we propose an optimised DRPWM (ODRPWM) for the three-phase inverter. First, the modulating principle is proposed, and then, a mathematical model of power spectral density (PSD) of the output voltage is developed and validated for the three schemes, namely RPPM, RCFM and RCFM-RPPM. PSD analysis shows that the proposed scheme is more effective on spreading PSD. Moreover, this analysis reveals optimal parameters of randomisation for a maximum spread of the PSD. The optimisation problem is then modelled and solved using two powerful non-linear methods