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This paper compares several carrier-based PWM techniques to see their influence on the common-mode voltage (CMV) and common-mode current (CMC) of a six-phase full-bridge inverters. Fast Fourier Transform (FFT) analysis displays the dominant harmonics spectrum of the CMV and CMC of each carrier-based PWM techniques. The influence of dead-time on the CMV and CMC is also addressed.Simulation and experimental results are included to see which carrier-based PWM techniques induce the most rms value of common-mode current to the six-phase full-bridge inverters.

This paper compares several carrier-based PWM techniques to see their influence on the common-mode voltage (CMV) and common-mode current (CMC) of a six-phase full-bridge inverters. Fast Fourier Transform (FFT) analysis displays the dominant harmonics spectrum of the CMV and CMC of each carrier-based PWM techniques. The influence of dead-time on the CMV and CMC is also addressed. Simulation and experimental results are included to see which carrier-based PWM techniques induce the most rms value of common-mode current to the six-phase full-bridge inverters.

International audience; ElectroMagnetic Interference (EMI) simulation of power converters helps engineers in the design process. In this paper, we describe a frequency-domain simulation method based on the Multi-Topology Equivalent Sources (MTES) model. The aim is to reproduce the non-linear behavior of power switches for a fast evaluation of the conducted EMI. The method performance is validated on a DC-DC converter.

Wide band-gap semiconductors exhibit superior performance compared to their silicon counterparts, which has enabled converters to work at higher switching frequencies. However, a higher switching frequency means larger harmonics in the electromagnetic interference (EMI) range which may lead to the need for a larger EMI filter. This paper has essentially two main purposes: to find the impact of switching frequency (swept from 40 kHz to 300 kHz) on the size of EMI filter (especially the inductor part of it) and to evaluate the size using different modulation techniques. This paper shows that the effect of increasing the switching frequency on the size of EMI filter is not linear. The differential mode filter part of EMI filter results differently against the common mode filter part of it when the switching frequency and modulation technique changes. Therefore, depending on the application a suitable modulation and frequency can be picked to result an optimum filter. To support the method of the filter design, a filter is designed and built for a 5kW two-level power factor correction rectifier and the design is supported with EMI measurement on the unit.

In this study a 5kW power supply for aircraft applications has been designed. Boost type power factor correction topology Delta rectifier complies with military standards of conducted emissions and is selected as a front-end rectifier for 400 Hz mains power supply. For isolation and output Dc voltage regulation a full bridge Dc-Dc converter with 99% efficient high frequency transformer has been designed.

Parasitic coupling can play a significant role in the overall performance of overall multiple EMI filters. The filter attenuation can be degraded with inductive and capacitive couplings. This paper is to examine the parasitic coupling effects among the filter components and the physical orientations of the individual EMI chokes.

The frequency range 2 – 150 kHz, typically occupied by switching harmonics and communication signals, is still a gap in the IEC emission standards. The main difficulty in reaching a standardized measurement method is finding a suitable power source. The low-frequency and high-frequency content of the power supply is deterministic for the measured emission, as well as the source impedance. Measurements and analyses are done on both PV-inverters and compact fluorescent lamps to see the influence of the source on the emission.

Medium voltage 10 kV Silicon Carbide MOSFETs, introduce challenges regarding converter design. Very high rate of voltage change and capacitive couplings to for example cooling systems cause increased electromagnetic interference. The aim of this paper is to accurately model the capacitive coupling to a heat sink and experimentally validate the model. An analytic model of the heat sink is developed which is demonstrated to be in excellent agreement with experimental results. The experimental result validates the modelled heat sink network allowing engineers to choose a suitable grounding impedance to comply with the electromagnetic compatibility regulations.

This paper investigates gate driver design challenges encountered due to the fast switching transients in medium voltage half bridge silicon carbide MOSFET power modules. The paper presents, design of a reduced isolation capacitance regulated DC-DC power supply and a gate driver with an active Miller clamp circuit for a 10 kV half bridge SiC MOSFET power module. Designed power supply and the gate driver circuit are verified in a double pulse test setup and a continuous switching operation using the 10 kV half bridge silicon carbide MOSFET power module. An in-depth experimental verification and detailed test results are presented to validate the gate driver functionality. The designed gate driver circuit shows satisfactory performance with increased common mode noise immunity and protection against the Miller current induced unwanted turn on.

PFC converters are widely used in industrial drive systems. The modulation scheme and the topology of the converter have a considerable impact not only on the switching losses, but also on the volume of the passive components, i.e. the EMI filter (CM and DM) and the dC link capacitors. In order to evaluate this impact, different modulation schemes for 2L and 3L topologies are analysed in this paper based on comprehensive converter optimizations. In these optimizations also a model for the EMI filter is included and the optimal converter volume including the EMI filter is evaluated for the different topologies and modulation schemes. Thus, significant differences in the converter volume can be observed for the different modulation schemes. Also the impact of SiC semiconductors on the system performance is analysed. The 3L-NPB modulation scheme with a NPC topology offers the best compromise of heat sink, EMI filter and DC link capacitor volume., 2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe), ISBN:978-90-75815-27-6, ISBN:978-90-75815-26-9, ISBN:978-1-5386-0530-1

International audience; This paper presents a modelling approach to build a multiport ICIM-CI model describing the impact of RF disturbances injection through different pins of a micro-power bandgap reference. The component chosen for this study is a commercial one. It combines high accuracy and low drift with low supply current and small package.

A Wireless Power Transfer (WPT) system based on magnetic resonant coupling is applied to a small electrical Unmanned Aerial Vehicle (UAV) to recharge its battery. The transmitting coil is assumed to be on a terrestrial base station, while the receiving coil is onboard. The operation frequency is fixed to 150 kHz. Key aspects for this kind of application are the reduction of the weight of the onboard WPT system while maintaining high WPT efficiency and avoiding EMC/EMI problems on the drone electronic system. In this study, the feasibility of the WPT charging system applied to a demonstrative drone has been proved.

The application of the Wireless Power Transfer (WPT) technology to a pacemaker for recharging its battery requires the pacemaker to be equipped with a secondary WPT coil. This coil acts as a receiving loop antenna for external electromagnetic fields. Thus, the induced current and voltage can be a source of EMI for the pacemaker circuitry. Aim of this study is to investigate how to reduce these induced effects by choosing an adequate design of the WPT secondary coil.

Predicting and solving EMI emissions related to Common Mode (CM) ones in inverter (including pulse with modulation (PWM) inverter)-induction motor drive systems requires various frequency-dependent effects to be considered. Thus, the application of filter circuitry to improve the performance per size and prevent dependency on some parameters of the motor for Electro-Magnetic Interference (EMl) filter is considered. The major problems are power line frequency rejection and the compensation of the feedback loop, which is influenced by the wide-ranging utility impedance. Thus, the proposed method allows another way to determine Common Mode (CM) impedance components as a beginning way and sample on the application stage of EMI filter to prevent the EMI noise applying to the conducted electromagnetic emissions generally caused by power supply firstly, then secondly to Common Mode (CM) path of the motor drive system.

The Coupled Interleaved Multicellular Parallel (CIMP) topology is the subject of intense research because of its advantages in terms of systems integration, power density increase, low level of EMI emissions and dynamic performance. This paper evaluates the viability of application of switching frequency modulation techniques to CIMP topology.

This paper deals with a hybrid electric vehicle power supply system composed of a fuel cell as primary source and a supercapacitors module as an intermediate energy storage system. Due to low supercapacitors and Fuel Cell voltages and due to voltage level regulation, converters are necessary to interface the fuel cell and the supercapacitors module to the power-train of the electric vehicle. Three DC/DC converter topologies are considered in this paper: Conventional step-up DC/DC converter, Interleaved multi-channel step-up DC/DC converter and Full-Bridge step-up DC/DC converter. Simulations of three converters based on each topology are carried-out with 30 KW as maximum power. The aim of this work is to have a comparative study which takes into account the weight, volume, current and voltage ripples, electromagnetic interference (EMI) and the efficiency of each converter in order to select the most suitable topology for fuel cell electric vehicle application. It is shown that the interleaving technique has the advantage of lightweight and compact size, high efficiency, small voltage and current ripples which is very beneficial for fuel cells lifetime.

Fast switching of PWM-inverters cause a lot of electromagnetic interference (EMI). To lower the dv/dt, output filters are available. In this paper, the influence of the cable and the output filters on conducted emission is investigated. By combining impedance measurements and EMI-measurements particular dips in the spectrum can be explained. ispartof: pages:4997-5006 ispartof: The 13th European Conference on Power Electronics and Applications pages:4997-5006 ispartof: EPE2009 location:Barcelona date:8 Sep - 10 Sep 2009 status: published

State-space modeling of a single-phase four quadrant converter for traction application is presented. From the nonlinear switched state-space model a multi-frequency averaged linear timeinvariant model (LTI) is derived which is applicable for steady-state and small signal analysis. It is shown how to derive LTI models of arbitrary accuracy which can be used for fast simulation, direct steady-state calculations, and for small signal analysis. Applicability of the method for analysis of disturbance progression from the DC-link into the grid, and vice-versa is presented.

Pulse Width Modulation (PWM) drives have the ability to cause EMI. The impact of Modern Adjustable Speed Drive (ASD) on wireless communications is investigated. Electromagnetic (EM) field in ASD environments was measured. The measurements were focused on frequencies used for radioservices where radiated emission may produce problems (ie. AM broadcasting). The measuring results show that modern Adjustable Speed Drives may disturb wireless communications that operate at LF and MF frequencies (up to couple MHz). They may also cause health hazards to humans if the maintenance works are carried out during the ASD operation while the cabinet door is open.

International audience; The proposed method allows to calculate explicitly, using mathematical notions of barycenter and mixed product, the conduction duration switches of a n-leg 2-level Voltage Source Inverter (VSI) supplying a n-wire load. This method depends on a new geometrical and vectorial VSI characterization. Its geometrical feature enables optimization and graphic representation such as the Space Vector Method (SVM) for a 3-leg VSI. Its vectorial feature enables to generalize to n phase systems the properties found out with three phase systems.

This paper presents a low cost, modular, configurable and fully protected education tool based on a generic electronic converter to be used by students, providing them with skills regarding power electronics and converters, and enabling them to learn from experience the most important issues concerning DC and AC electric drives.

This paper compares several carrier-based PWM techniques to see their influence on the common-mode voltage (CMV) and common-mode current (CMC) of a six-phase full-bridge inverters. Fast Fourier Transform (FFT) analysis displays the dominant harmonics spectrum of the CMV and CMC of each carrier-based PWM techniques. The influence of dead-time on the CMV and CMC is also addressed. Simulation and experimental results are included to see which carrier-based PWM techniques induce the most rms value of common-mode current to the six-phase full-bridge inverters.

This paper presents the comparison of the common-mode (CM) noise in widely-used phase-shifted (PSFC) and hard-switched (HSFC) full-bridge forward converters. The CM noise voltages across the interleaved transformers' coupling capacitances-one of the significant parasitic coupling capacitances in the isolated converters-are analyzed for both types of switching schemes. Experimental prototypes are built for both switching techniques to verify the CM noise models and their analyses. In contrast to the state-of-the-art belief, the comparison reveals that PSFC generates far more CM noise than its counterpart for the same operating parameters.