Spread spectrum in random PWM DC-DC converters by PSO&amp;GA optimized randomness levels

Marsala, Giuseppe; Ragusa, A.

doi:10.1109/emc-b.2017.8260363

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…This research aims to introduce a novel technique that utilizes spectral spreading to reduce or eliminate electromagnetic noise levels. This involves distributing harmonic energy across a wide frequency spectrum, as supported by references [11][12][13]. Pseudo-random modulation is the chosen method, involving the randomization of three key parameters: duty cycle, period, and delay time, known as random pulse width modulation (RPWM), random carrier frequency modulation (RCFM), and random pulse position modulation (RPPM) [14,15].…”

Section:  Issn: 2089-3272mentioning

confidence: 99%

Implementing Pseudo-Random Control in Boost Converter: An Effective Approach for Mitigating Conducted Electromagnetic Emissions

M'barki,

Mejdoub,

Rhazi

et al. 2023

IJEEI

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Currently, pulse width modulation (PWM) is a prevalent technique in the field of DC-DC converter control. Its primary objectives encompass maintaining the regulation of the converter's output voltage and improving the load's performance by mitigating the adverse effects caused by harmonic distortions. Unfortunately, the utilization of PWM is associated with significant levels of residual harmonics, characterized by notable amplitudes and frequencies, which have the potential to induce mechanical vibrations, acoustic disturbances, and electromagnetic interference (EMI).To address this challenge, a method known as pseudo-random modulation (PRM) has been developed. In comparison to traditional PWM, PRM offers ease of implementation and high efficacy in EMI mitigation. PRM achieves this by distributing harmonic power across a broader frequency range, thereby reducing the prominence of high-amplitude harmonics at specific frequencies. Within the context of Spread Spectrum Modulation (SSM), this study extensively explores diverse converter topologies and proposes an innovative hardware implementation using the cost-effective Atmega328p microcontroller. Furthermore, the study scrutinizes the consequences of implementing this randomized control strategy to reduce electromagnetic emissions from a Boost converter, a well-recognized source of significant interference in its operational environment. Ultimately, the aim is to evaluate the effectiveness of these applied methodologies in achieving the maximum dispersion of the power spectrum, thereby enhancing overall electromagnetic compatibility.

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Section:  Issn: 2089-3272mentioning

confidence: 99%

Implementing Pseudo-Random Control in Boost Converter: An Effective Approach for Mitigating Conducted Electromagnetic Emissions

M'barki,

Mejdoub,

Rhazi

et al. 2023

IJEEI

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“…The combination of any two fundamental schemes or the three schemes results in the hybrid random PWM scheme [33]. The particle swarm optimization algorithm and the genetic algorithm have also been used to optimize the random PWM scheme [34,35]. Based on harmonic characteristic analysis, the performance of the random scheme can be improved to satisfy special requirements through harmonic spectra shaping and customization [23,29,35,36].…”

Section: Introductionmentioning

confidence: 99%

Study on Harmonic Suppressing Performance of Random Space Vector PWM in Electric Vehicle

2023

IJOMAM

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The random SVPWM strategy can significantly suppress the clustering harmonic amplitudes of the traditional SVPWM strategy in the driving system of the electric vehicle (EV). Therefore, the principle of the random SVPWM strategy has been detailed. The expression for the signal randomization scheme is given, and then a comprehensive working time expression for the random switching frequency SVPWM, the random zero-vector distribution SVPWM, the random pulse position SVPWM and the hybrid random SVPWM schemes has been derived. An experimental validation has been carried out. The results show that the random SVPWM strategy has excellent performance on suppressing the harmonic amplitudes of the current and the electromagnetic torque.

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“…In the subject matter literature, some papers emphasize the necessity for assurance of reliable operation of complex energy systems and the need for EMC assurance [2][3][4][5][6][7][8]. Furthermore, some papers highlight how approaches concerning deterministic modulation (DetM) and random modulation (RanM), based on the parameters' control of fundamental switching frequency ( f sw ) and duty cycle (d), may contribute to achieving EMC requirements [9][10][11][12][13][14][15][16][17][18][19][20]. Indeed, the RanM has been widely used since the 1980s [21].…”

Section: Introductionmentioning

confidence: 99%

Aggregated Conducted Electromagnetic Interference Generated by DC/DC Converters with Deterministic and Random Modulation

et al. 2020

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The assessment of electromagnetic compatibility (EMC) is important for both technical and legal reasons. This manuscript addresses specific issues that should be taken into account for proper EMC assessment of energy systems that use power electronic interfaces. The standardized EMC measuring techniques have been used in a laboratory setup consisting in two identical DC/DC converters with deterministic and random modulations. Measuring difficulties caused by the low frequency envelopes, resulting from frequency beating accompanying aggregation of harmonic components of similar frequencies, were indicated as a phenomenon that might lead to significant problems during the EMC assessment using currently binding standards. The experimental results describing deterministic and random modulated converters might be useful for practitioners implementing power interfaces in microgrids and power systems as well as for researchers involved in EMC assurance of power systems consisting in multiple power electronic interfaces.

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Spread spectrum in random PWM DC-DC converters by PSO&GA optimized randomness levels

Cited by 10 publications

References 10 publications

Implementing Pseudo-Random Control in Boost Converter: An Effective Approach for Mitigating Conducted Electromagnetic Emissions

Implementing Pseudo-Random Control in Boost Converter: An Effective Approach for Mitigating Conducted Electromagnetic Emissions

Study on Harmonic Suppressing Performance of Random Space Vector PWM in Electric Vehicle

Aggregated Conducted Electromagnetic Interference Generated by DC/DC Converters with Deterministic and Random Modulation

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