scholarly journals Electromagnetic interference prediction of power converter including nonlinear behavior of inductive component

2014 ◽  
Author(s):  
Yitao Liu
Keyword(s):  
Electromagnetic Interference ◽  
Nonlinear Behavior ◽  
Power Converter ◽  
Inductive Component

scholarly journals A Survey of Electromagnetic Influence on UAVs from an EHV Power Converter Stations and Possible Countermeasures

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 701
Author(s):  
Yanchu Li ◽  
Qingqing Ding ◽  
Keyue Li ◽  
Stanimir Valtchev ◽  
Shufang Li ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Wide Spectrum ◽  
Electromagnetic Emission ◽  
Power Converter ◽  
Electromagnetic Environment ◽  
Communication Circuits ◽  
Electromagnetic Emissions ◽  
Surrounding Space ◽  
Extra High Voltage ◽  
The Impact

It is inevitable that high-intensity, wide-spectrum electromagnetic emissions are generated by the power electronic equipment of the Extra High Voltage (EHV) power converter station. The surveillance flight of Unmanned Aerial Vehicles (UAVs) is thus, situated in a complex electromagnetic environment. The ubiquitous electromagnetic interference demands higher electromagnetic protection requirements from the UAV construction and operation. This article is related to the UAVs patrol inspections of the power line in the vicinity of the EHV converter station. The article analyzes the electromagnetic interference characteristics of the converter station equipment in the surrounding space and the impact of the electromagnetic emission on the communication circuits of the UAV. The anti-electromagnetic interference countermeasures strive to eliminate or reduce the threats of electromagnetic emissions on the UAV’s hardware and its communication network.

scholarly journals Reliability of Boost PFC Converters with Improved EMI Filters

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 413 ◽  
Author(s):  
Haoqi Zhu ◽  
Dongliang Liu ◽  
Xu Zhang ◽  
Feng Qu
Keyword(s):  
Electromagnetic Interference ◽  
High Frequency ◽  
Power Converter ◽  
Differential Mode ◽  
Conduction Path ◽  
Common Mode ◽  
Class B ◽  
The Common ◽  
Emi Filter ◽  
Stability Issues

The switching device in a power converter can produce very serious electromagnetic interference (EMI). In order to solve this problem and the associated reliability and stability issues, this article aimed to analyze and model the boost power factor correction (PFC) converter according to the EMI conduction path. The sources of common-mode (CM) and differential-mode (DM) noise of the boost PFC converter were analyzed, and the DM and CM equivalent circuits were deduced. Furthermore, high-frequency modeling of the common-mode inductor was developed using a precise model, and the EMI filter was designed. According to the Class B standard for EMI testing, it is better to restrain the EMI noise in the frequency range (150 kHz to 30 MHz) of the EMI conducted disturbance test. Using this method, a 2.4-kW PFC motor driving supply was designed, and the experimental results validate the analysis.

Frequency Characterization of Ferrite Beads in the Microwave Range for Nonlinear Applications

2014 ◽  
Vol 802 ◽  
pp. 552-557
Author(s):  
Lauro Paulo Silva Neto ◽  
J.O. Rossi ◽  
P.A.G. Dias ◽  
J.J. Barroso
Keyword(s):  
Transmission Lines ◽  
Electromagnetic Interference ◽  
Nonlinear Behavior ◽  
Complex Permeability ◽  
Microwave Range ◽  
Limited Information ◽  
Low Frequencies ◽  
High Power Microwave ◽  
Low Pass ◽  
Low Pass Filters

Ferrite beads are ferromagnetic materials that exhibit a small inductance at low frequencies, becoming resistive at high frequencies. These devices are used as low pass filters for reducing electromagnetic interference (EMI) in communications and power electronics because the resistive losses attenuate the undesired frequencies. As ferrite beads have a nonlinear behavior with current and frequency they have been used in nonlinear transmission lines (NLTLs) for high power microwave generation in space and defense applications. In this work, high frequency ferrite beads are characterized in the frequency range up to 1 GHz by measuring S11 reflection parameter in order to calculate their complex permeability and losses, key parameters in the design of NLTLs. In addition, X-ray diffraction (XRD) is used to identify their chemical element composition. Finally, the motivation for this work is basically due to the limited information on ferrite materials provided by the manufacturers.

Converter-Level Integration for Wide Band-Gap Automotive Power Electronics

2018 ◽  
Vol 2018 (1) ◽  
pp. 000069-000074
Author(s):  
C Mark Johnson ◽  
Jordi Espina ◽  
Behzad Ahmadi ◽  
Jingru Dai ◽  
Bassem Mouawad ◽  
...  
Keyword(s):  
Band Gap ◽  
Electromagnetic Interference ◽  
Wide Band ◽  
Power Converter ◽  
Passive Component ◽  
Wide Band Gap ◽  
Efficient Operation ◽  
Switching Losses ◽  
Potential Benefits ◽  
Current Transition

Abstract Wide band-gap (WBG) semiconductors offer many potential benefits to designers of power electronic systems. Lower switching losses allow operation at higher switching frequencies, which in principle allows a reduction in passive component values in many converter applications. However, efficient operation at higher switching frequencies requires increased voltage and current transition rates. With conventional packaging and circuit construction, parasitic inductance and capacitance can deteriorate converter performance, reducing efficiency and adding to the electromagnetic interference (EMI) emitted from the system. Outside the commutation cell, fast voltage transitions may lead to unacceptably high levels of conducted and radiated EMI, so approaches involving the local filtering of converter outputs are attractive. To mitigate these effects in conventional modules, switching speeds are often deliberately limited and the potential benefits of using WBG technologies cannot be fully realized. Here we examine the design and realization of Converter-in-Package (CiP) modular blocks for system power levels from 100s W to 100s kW, incorporating individual commutation cells with close-coupled gate drives, input/output filtering and reduced EMI. The concept is illustrated through the realization of a modular, segmented power converter for an integrated drive.

Research on Conducted EMI in Power Converter

2012 ◽  
Vol 516-517 ◽  
pp. 1808-1811
Author(s):  
Bin Liang
Keyword(s):  
Electromagnetic Interference ◽  
High Frequency ◽  
Low Frequency ◽  
Power Converter ◽  
Power Electronic ◽  
Frequency Bandwidth ◽  
Differential Mode ◽  
Three Phase ◽  
Electronic Switches ◽  
Conducted Emi

This paper researches differential mode (DM) conducted electromagnetic interference (EMI) in rectifier. The DM interference source generated by power electronic switches is given. Based on experimental and theoretical analysis, the conducted EMI of a three-phase rectifier is studied systematically. The study shows that it changes with resistance loads in low frequency ranges, while in high frequency bandwidth, the effect of change of the resistance load on the DM EMI is not obvious. The validity of the models is confirmed by the measurements.

Nonlinear Behavior in Current Mode Research of Z-Source DC/DC Converter

2010 ◽  
Vol 44-47 ◽  
pp. 1677-1681
Author(s):  
Ke Guo ◽  
Yan Chen ◽  
Lin Zhou ◽  
Lu Dai
Keyword(s):  
Theoretical Basis ◽  
Nonlinear Behavior ◽  
Current Mode ◽  
Power Converter ◽  
Current Control ◽  
Nonlinear Characteristic ◽  
Characteristic Analysis ◽  
Mapping Model ◽  
And Control ◽  
Conduction Mode

Z-source converter as a kind of power converter will be responsible for the energy transmission, the paper focuses on the nonlinear characteristic analysis of Z-source DC/DC converter, in the continuous conduction mode (CCM), take Z-source converter with peak current control as the research object, establish stroboscopic mapping model for analyzing its nonlinear characteristic. the experiment result proves that Z-source converter stroboscopic mapping model is correct for analyzing its nonlinear behavior, which provides a theoretical basis for optimal design and control.

scholarly journals Investigations on the Use of the Power Transistor Source Inductance to Mitigate the Electromagnetic Emission of Switching Power Circuits

Signals ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 586-603
Author(s):  
Erica Raviola ◽  
Franco Fiori
Keyword(s):  
Electromagnetic Interference ◽  
Power Efficiency ◽  
Electromagnetic Emission ◽  
Optimization Method ◽  
Power Converter ◽  
Primary Concern ◽  
Power Transistor ◽  
Power Transistors ◽  
Power Switches ◽  
Oscillation Damping

With power designers always demanding for faster power switches, electromagnetic interference has become an issue of primary concern. As known, the commutation of power transistors is the main cause of the electromagnetic noise, which can be worsened by the presence of unwanted oscillations superimposed onto the switching waveforms. This work proposes a solution to mitigate the oscillations caused by the turn-on of a power transistor by exploiting its source inductance plus an external one. In this context, an optimization method is proposed to find the optimal value of the source inductance as a trade-off between oscillation damping and power dissipation. The experimental results performed on a prototyped power converter assess the proposed technique as the spectrum of the conducted emission is attenuated by 20 dB at the oscillation frequency. With respect to traditional solution based on snubbers, the proposed solution results in a similar oscillation damping, but with a 0.5% higher power efficiency.

scholarly journals Radiated EMI from power converters

2005 ◽  
Vol 2 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Vesna Arnautovski-Toseva ◽  
Yanis Rousset ◽  
El Drissi ◽  
Leonid Grcev
Keyword(s):  
Electromagnetic Interference ◽  
Power Converters ◽  
Local System ◽  
Power Converter ◽  
Switching Frequency ◽  
Electronic Systems ◽  
Continuous Increase ◽  
Safe Level ◽  
Full Wave ◽  
Layout Geometry

With the continuous increase of switching frequency together with the ongoing trend to higher complexity and functionality, power converters as a part of electronic systems have raised more and more electromagnetic energy pollution to the local system environment. In the same time, stringent demands are imposed on the designers of new circuits that electromagnetic interference (EMI) has to be suppressed at its source before it is allowed to propagate into other circuits and systems. In this paper, the authors present a full-wave numerical method for calculation and simulation of electromagnetic field radiated by power converter circuitry. The main objective is to analyze the layout geometry in order to obtain competitive PCB layout that will enable suitably attenuated level of the radiated electric field to safe level. By this it would be possible to ensure reliable operation of the sensitive electronic components in the proximity.

Energy-Harvesting Shock Absorbers With Ride Comfort Controller on Vehicle

2016 ◽  
Author(s):  
Chien-An Chen ◽  
Khai D. T. Ngo ◽  
Lei Zuo
Keyword(s):  
Ride Comfort ◽  
Controller Design ◽  
Circuit Simulation ◽  
Fuel Efficiency ◽  
Nonlinear Behavior ◽  
Power Converter ◽  
Input Current ◽  
Vehicle Body ◽  
Shock Absorbers ◽  
Force Tracking

In order to achieve higher fuel efficiency and better ride comfort, this paper introduces a shock absorber system including Mechanical-Motion-Rectifier (MMR), power converter and its current/force tracking (ICFT) controller. MMR based shock absorbers has the benefit of higher efficiency and better mechanical reliability than conventional regenerative shock absorbers. However, the one-way clutches and inertia in MMR induce disengagement between input shaft and generator. This nonlinear behavior makes the input current/force of MMR uncontrollable with conventional feedback controller design. To solve this problem, this paper presents an input current/force tracking (ICFT) controller for MMR based suspension system. By adding additional control laws to the conventional controller, ICFT controller successfully solves the nonlinearity problem during MMR control. This ICFT controller is tested by tracking the reference force from skyhook control to improve ride comfort. The vehicle body displacement is simulated under specified speedbump. By using this ICFT controller, the simulation result show displacement error between skyhook and ICFT-MMR is within 5% and its total harvested energy is 56 joules, as 56 W of average input power. Equivalent circuits used for circuit simulation are proved to have identical performances as mechanical models.

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