The application of chaotic PWM control for EMI suppression

Li, Hong; Lin, Fei; Li, Zhong; You, Xiajie; Zheng, Trillion Q.; Zhang, Bo

doi:10.1108/03321641311305728

Cited by 9 publications

(5 citation statements)

References 19 publications

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“…Future work will consider the near-field coupling effects to establish the conducted EMI and radiated EMI prediction model for the DC/DC converter (Yao et al , 2021), and verify the effectiveness of these EMI prediction models through an experimental prototype. In addition, active suppression methods, such as chaotic PWM (Li et al , 2013), will be used to suppress higher EMI caused by the high-frequency operation of GaN HEMTs.…”

Section: Discussionmentioning

confidence: 99%

Conducted EMI analysis and filters design for a high-low voltage DC/DC converter based on GaN HEMTs in electric vehicle

Qiao

Yang

Huo

et al. 2022

COMPEL

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Purpose The purpose of this paper is to study conducted electromagnetic interference (EMI) of the high-low voltage DC/DC converter based on GaN high-electron-mobility transistors (HEMTs) in electric vehicle, and design EMI filters to suppress the conducted EMI. Design/methodology/approach The conducted EMI propagation model is established through simulation and analysis studying the influences of parasitic parameters, operation mode, output power and near-field capacitive coupling effects on conducted EMI of the DC/DC converter and comparing the suppression effects of EMI filters with different topologies to select the best EMI filter. Findings It is shown that parasitic parameters, operation mode, output power and near-field capacitive coupling effects can affect the conducted EMI of the DC/DC converter, and EMI filters of the CLC topology can effectively suppress the conducted EMI below the limit of CISPR 25. Originality/value Analysis of conducted EMI and design of EMI filters greatly facilitate further explorations and studies on EMI problems of the high-low voltage DC/DC converter based on GaN HEMTs.

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Section: Discussionmentioning

confidence: 99%

Conducted EMI analysis and filters design for a high-low voltage DC/DC converter based on GaN HEMTs in electric vehicle

Qiao

Yang

Huo

et al. 2022

COMPEL

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“…Comparing (19), (25), and (26), it can be seen that the PSDs of sw 1 (t) and sw 2 (t) contain discrete harmonics at the multiples of switching frequency, while sw 3 (t) has a continuous spectrum with reduced spectral peaks. The standard PWM waveforms with different switching transients have similar low-frequency spectral components.…”

Section: Spectral Comparisonmentioning

confidence: 99%

“…Among these frequency modulation techniques, the chaotic frequency modulation technique is an emerging technology for EMI mitigation which enables the converters to generate switching waveforms with continuous spectra. The researches on switching power converters under chaotic frequency modulation have been settled on theory analysis [19,22,23], simulations, and experiments [24][25][26]. It has been presented that the chaotic frequency modulation technique can mitigate interference effectively.…”

Section: Introductionmentioning

confidence: 99%

EMI mitigation in switching power converters combining closed‐loop gate drive and chaotic frequency modulation technique

Cui

et al. 2019

IET Power Electronics

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All switching power converters are characterised by inevitable switching actions with relevant interference emissions. The voltage and current transients of power metal oxide semiconductor field effect transistor (MOSFET)/insulated-gate bipolar transistor are the main sources in switching power converters for both conducted and radiated emissions. In this study, a promising electromagnetic interference (EMI) mitigation method combining the closed-loop gate drive method and the chaotic switching frequency modulation technique is demonstrated for switching power converters. A chaotic pulse-width modulation waveform with Gaussian S-shape switching transients was proposed to achieve remarkable reduced EMI generation at all frequencies. Spectral characteristics of this new switching waveform were investigated by the power spectral density to verify the feasibility of reduced EMI generation. A closed-loop gate controller was presented to shape the switching transients of power MOSFET into the proposed switching waveform. Circuit tests were carried out in both simulations and experiments. The results validated that the proposed method could achieve remarkable EMI mitigation in switching power converters.

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“…These effects of PWM drives on the bearing and insulation of an electrical machine has attracted great attention in the recent decade [1,2]. Moreover, the chaotic PWM has been considered as a known solution to electro-magnetic interference (EMI) [3][4][5][6][7][8][9][10] in addition to other methods such as active filtering [11], reverse injection [12] or using a multi-level inverter with common mode reduction techniques [13]. Although the spectrum analysis of chaotic sine-wave PWM (CSPWM) has been studied in [8,14], its effects on the bearings of an electrical machine hitherto have not been studied.…”

Section: Introductionmentioning

confidence: 99%

“…So, if the chaotic and periodic waveforms are considered with identical root-mean-square (RMS) values, the peak values of the spectrum amplitude for the chaotic waveform are much lower than the periodic one. This property of choas is used to reduce EMI [3][4][5][6][7][8][9][10]. In addition, it has been shown that chaotic modulation is highly effective in reducing mechanical resonance and low-frequency noise [24].…”

Section: Introductionmentioning

confidence: 99%

Integral‐series Fourier analysis of chaotic PWM patterns for common mode voltage stresses

Asefi

Nazarzadeh

2018

IET Power Electronics

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In this study, the theory of pulse width modulation (PWM) is developed for both sine-wave PWM (SPWM) and chaotic sine-wave PWM (CSPWM). In SPWM, power spectra are analysed by an analytical method such as double Fourier series (DFS) technique, and the integral-series Fourier method is fully devised and analytically theorised for CSPWM. It is shown that the root-mean-square value of inverter's zero-sequence voltage does not rely on carrier and reference frequency in fixedfrequency SPWM, while in CSPWM, this depends on frequency modulating gain and chaotic sequence of numbers. Also, the computation time of purely numerical harmonic analysis can be much heavier than analytical ones. Furthermore, the DFS and integral-series Fourier methods are applied to SPWM and CSPWM with two different frame sizes of squirrel cage motors for the shaft voltage and the electromagnetic interference (EMI). The numerical and experimental results show that CSPWM can have positive effect on the shaft voltage while it definitely weakens the EMI problems.

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The application of chaotic PWM control for EMI suppression

Cited by 9 publications

References 19 publications

Conducted EMI analysis and filters design for a high-low voltage DC/DC converter based on GaN HEMTs in electric vehicle

Conducted EMI analysis and filters design for a high-low voltage DC/DC converter based on GaN HEMTs in electric vehicle

EMI mitigation in switching power converters combining closed‐loop gate drive and chaotic frequency modulation technique

Integral‐series Fourier analysis of chaotic PWM patterns for common mode voltage stresses

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