Conducted Emissions Suppression of Active Front End (AFE) Drive Based on Random Switching Frequency PWM

Zhang, Zhe; Wei, Lixiang; Yi, Peizhong; Cui, Yujia; Murthy, Puneeth Srikanta; Bazzi, Ali M.

doi:10.1109/tia.2020.3016629

Cited by 22 publications

(3 citation statements)

References 39 publications

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“…Modular multilevel converter-based AFE rectifier topology is studied in [11] under unbalanced power grid conditions to improve the steady-state performance of the system that feeds the variable-speed motor drive. Variable-speed motor drives are a massive part of the grid-connected loads in distribution networks that use either conventional diode bridge rectifiers along with inverters or AFE rectifiers to adjust the operating frequency [12]. Recently, modular power converters with AFE rectifiers have been extensively utilized by motor drives to improve their harmonic characteristics and raise the overall power quality.…”

Section: Introductionmentioning

confidence: 99%

Improved Dynamic Performance of Average-Value Modelled Active Front-End Rectifiers

Ebadpour

2024

Electronics

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Active front-end (AFE) rectifiers have become widely employed in power systems to achieve unity power factor and harmonic mitigations. The typical modeling approaches applied for AFE rectifiers in the literature mostly relied on two baselines: the detailed model and the time-average model. The former approach deals with the switching element model (SEM), which leads to significant harmonics in currents with distorted waveforms. The latter approach uses the average-value model (AVM) to overcome the currents’ harmonics as well as provide fast responses. However, even the AVM baseline has shown problems during the starting stage (lack of control signals) and over the dead-time periods, which causes serious issues in the implementation process. This paper presents an improved dynamic AVM for AFE rectifiers by precisely considering the issues mentioned above, along with the practical starting procedure and desirable initialization. The studied AFE rectifier is developed using the voltage-oriented control (VOC) technique based on the different modeling methodologies, including SEM, Conventional AVM, and the proposed AVM. The performance of all models is analyzed and compared using simulation results with MATLAB/Simulink R2023a Function blocks for all the algorithm parts and SimScape elements for the electrical circuit model. The simulation results illustrate that the performance of the proposed AVM approach can closely resemble the behavior of the SEM baseline with low harmonic distortion. To evaluate the performance of the proposed model, several case studies are investigated to verify the AFE rectifier operation, regarding mostly the total harmonic distortion (THD) wherein the THD percentages are improved to 4.78 and 2.5 from 5.14 and 2.78 for low- and high-power loads, respectively.

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Section: Introductionmentioning

confidence: 99%

Improved Dynamic Performance of Average-Value Modelled Active Front-End Rectifiers

Ebadpour

2024

Electronics

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“…It has several benefits, such as improving compliance with EMC standards for EMI and mitigating acoustic noise in ASDs [2][3][4]. 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].…”

Section: Introductionmentioning

confidence: 99%

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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“…This interference occurs at the fundamental frequency of the switching mechanism and harmonic frequencies [12]. For example, conducted EMI from DC-DC converters often causes power quality problems in microgrids and electric or hybrid vehicles [13].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of common code conducted emission of multi-boost converters

Sudrajat,

Nuvus,

Mandaris

2023

J. Mechatron. Electr. Power Veh. Technol.

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One of the primary challenges faced when utilizing power converters such as a DC boost converter is electromagnetic interference (EMI) issues, one of which is common-mode (CM) noise. In order to mitigate the unwanted EMI from converters and design proper EMI filters, it is imperative to possess comprehensive insight into the characteristics of CM noise generated from the converters. This study presents the investigation regarding the characteristic of CM noise emitted by multi-boost converters when operated under varying duty cycle conditions. The research was conducted by measuring and analyzing the CM noise generated by three identical boost converters arranged in a parallel configuration. The result shows that the amplitude of each harmonic of CM noise generated by the multi-boost converters is 5 dB to 10 dB higher than CM noise from a single-boost converter. This is due to each converter being configured in the same conditions, producing a constructive interaction of the generated CM noise. Moreover, the duty cycle of pulse-width modulation (PWM) has a strong influence on the characteristic of the amplitude of each harmonic frequency. It is proven by the amplitude pattern of each harmonic of CM noise. Under duty cycle variations, the converters generate similar peaks and valley amplitude patterns as the Fourier transformation of the trapezoidal waveform used in the PWM setting.

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Conducted Emissions Suppression of Active Front End (AFE) Drive Based on Random Switching Frequency PWM

Cited by 22 publications

References 39 publications

Improved Dynamic Performance of Average-Value Modelled Active Front-End Rectifiers

Improved Dynamic Performance of Average-Value Modelled Active Front-End Rectifiers

Power Spectral Density of Dual Randomized Discontinuous Pulse Width Modulation

Characteristics of common code conducted emission of multi-boost converters

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