EPE Association: EPE 2022 - DS2f: EMI/EMC in Power Electronics including HF Phenomena

EPE 2022 - DS2f: EMI/EMC in Power Electronics including HF Phenomena
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 03: Measurement and Control > EPE 2022 - DS2f: EMI/EMC in Power Electronics including HF Phenomena

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   Analysis and Discussion of Different Three-Phase dv/dt Filter Topologies and the Influences of Their Filter Parameters on Losses and EMC
By Eric FRITZE [View]
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Abstract: In this paper two modified three-phase dv/dt filter networks are analysed. They're investigated in a fastswitching SiC-MOSFET inverter system with the primary purpose of reducing the steep voltage slopescaused by the wide bandgap semiconductor devices at the output of the inverter. This should preservethe insulation system of a connected electrical load machine from partial discharges and deterioration.The necessity of damping down the voltage slopes outside of the inverter can arise from the possibilityof lower switching losses and more favourable temperatures within the inverter. An additional filter ofcourse will cause power losses depending on it's parameters. Hence, the influence of the passive filterparameters on those losses are an integral part of the analysis. In addition to the slope-damping of theinverter output voltage, the two discussed filter topologies should also challenge the conducted EMI ofthe system. Therefore, both of the circuits use special modifications to reduce the interference levelsintroduced by the fast switching inverter. Furthermore, a diode clamping of the filter output voltage tothe DC-link potentials is implemented and it's impact on the dv/dt reduction, filter losses and EMI isdiscussed. Generally, a higher filter inductance, meaning a lower necessary capacitance, will reducethe extra filter losses at the expense of a higher filter volume as well as additional oscillations of theoutput voltage. The diode clamping leads to a significantly less overshoot and ringing of the resultingvoltages, but to an increase of the measured losses. Finally, examining the influences of the differentfilter topologies, their parameters and the diode clamping on the conducted EMC behaviour, it will beshown that both of the modified topologies have the ability to reduce EMI levels in certain areas.

   Bidirectional Active EMC Filter for Industrial Power Converters
By Bernhard WUNSCH [View]
[Download]

Abstract: Size and cost of EMC filters of power converters can be reduced using active circuits. In this work wedemonstrate the filter performance of a bidirectional active EMC filter in an industrial 75kW powerconverter driving a motor. The active filter is bidirectional since it suppresses EMC noise on eitherside of the filter. The voltage noise source on the grid side stems from magnetic coupling betweeninput and output of the converter. For a purely passive EMC filter, grid side noise needs to be filteredby large inductors. We show that the active filter which is based on current sensing and currentinjection strongly reduces the magnetic filter components required.

   Design and experimental validation of a Voltage Sensing-Current Cancellation Common Mode Linear Actif Filter
By Bacar MOHAMED NASSURDINE [View]
[Download]

Abstract: In recent years, the study and design of linear active EMI filters (AEF) have been the subject of manyresearch papers. Different modeling approaches to study the performances of the AEF have beenproposed. The aim of this paper is to introduce a methodology to design a Common Mode (CM) AEFable to cancel the CM electromagnetic interference noise in a given frequency range. The active filter is analyzed based on the CM noise model of a boost converter. The first part of the study is devoted to the modeling of the electrical structure of the filter and the definition of component values. In this part, attenuation, design rules and stability of AEF are addressed in detail. The second part of the study is dedicated to the simulations and experiments to validate the proposed methodology. This step allows realizing a functional prototype that complies with the DO160 standard (aeronautics) up to 1 MHz

   Design Interactions of AC- and DC-Side Filters for Traction Drives with SiC Inverters
By Hedieh MOVAGHARNEJAD [View]
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Abstract: This paper proposes a straightforward comprehensive design methodology for selecting anddimensioning parameters of common AC- Side filters and investigates the interactions between AC- andDC-side filters to avoid any over dimensioning in a traction drive system. A test setup has been implemented to validate the simulative investigations.

   Investigations on the Active Reduction of Common Mode Noise with Opposing Noise Sources
By Philipp MARX [View]
[Download]

Abstract: Conventional filters needed for the electromagnetic compatibility lower the system power density by consuming additional space in power electronic setups. To increase the power density, alternatives for these filters are needed. If the power electronic setup offers the possibility to synchronize two opposing switching transitions, the common mode noise can be reduced without additional filters. In this case two opposing noise currents reduce one another by superimposition. For power electronic setups which do not offer the possibility to synchronize switching transitions, this paper presents an approach which uses additional half bridges as opposing noise sources connected to a replicated grounding impedance to create the opposing common mode noise. The main goal of the opposing noise source is to create similar potential changes as the power electronic setup over the replicated grounding impedance. The replicated grounding impedance emulates the grounding impedance of an ohmic inductive load with discrete elements. The achieved reduction of the common mode noise with this approach is evaluated with measurements.

   Modeling method for conducted noise flowing in power lines of DC / DC converter
By Takato HATTORI [View]
[Download]

Abstract: This paper presents the modeling method of the conducted noise flowing in the input and output side power lines of DC/DC converter. The noise evaluation of DC-DC converters for automotive is based on the leakage current flowing in the power lines. The equivalent circuit of the conducted noise is derived by measuring and frequency analysis the leakage current flowing in the power lines. The noise evaluation simulation is performed by using the equivalent circuit. The usefulness of this proposed method for noise evaluation simulation has been confirmed by comparing the noise reduction effect of EMI filters in simulation and experiment.

EPE 2022 - DS2f: EMI/EMC in Power Electronics including HF Phenomena
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 03: Measurement and Control > EPE 2022 - DS2f: EMI/EMC in Power Electronics including HF Phenomena
	[return to parent folder]

	Analysis and Discussion of Different Three-Phase dv/dt Filter Topologies and the Influences of Their Filter Parameters on Losses and EMC By Eric FRITZE	[View] [Download]
Abstract: In this paper two modified three-phase dv/dt filter networks are analysed. They're investigated in a fastswitching SiC-MOSFET inverter system with the primary purpose of reducing the steep voltage slopescaused by the wide bandgap semiconductor devices at the output of the inverter. This should preservethe insulation system of a connected electrical load machine from partial discharges and deterioration.The necessity of damping down the voltage slopes outside of the inverter can arise from the possibilityof lower switching losses and more favourable temperatures within the inverter. An additional filter ofcourse will cause power losses depending on it's parameters. Hence, the influence of the passive filterparameters on those losses are an integral part of the analysis. In addition to the slope-damping of theinverter output voltage, the two discussed filter topologies should also challenge the conducted EMI ofthe system. Therefore, both of the circuits use special modifications to reduce the interference levelsintroduced by the fast switching inverter. Furthermore, a diode clamping of the filter output voltage tothe DC-link potentials is implemented and it's impact on the dv/dt reduction, filter losses and EMI isdiscussed. Generally, a higher filter inductance, meaning a lower necessary capacitance, will reducethe extra filter losses at the expense of a higher filter volume as well as additional oscillations of theoutput voltage. The diode clamping leads to a significantly less overshoot and ringing of the resultingvoltages, but to an increase of the measured losses. Finally, examining the influences of the differentfilter topologies, their parameters and the diode clamping on the conducted EMC behaviour, it will beshown that both of the modified topologies have the ability to reduce EMI levels in certain areas.

	Bidirectional Active EMC Filter for Industrial Power Converters By Bernhard WUNSCH	[View] [Download]
Abstract: Size and cost of EMC filters of power converters can be reduced using active circuits. In this work wedemonstrate the filter performance of a bidirectional active EMC filter in an industrial 75kW powerconverter driving a motor. The active filter is bidirectional since it suppresses EMC noise on eitherside of the filter. The voltage noise source on the grid side stems from magnetic coupling betweeninput and output of the converter. For a purely passive EMC filter, grid side noise needs to be filteredby large inductors. We show that the active filter which is based on current sensing and currentinjection strongly reduces the magnetic filter components required.

	Design and experimental validation of a Voltage Sensing-Current Cancellation Common Mode Linear Actif Filter By Bacar MOHAMED NASSURDINE	[View] [Download]
Abstract: In recent years, the study and design of linear active EMI filters (AEF) have been the subject of manyresearch papers. Different modeling approaches to study the performances of the AEF have beenproposed. The aim of this paper is to introduce a methodology to design a Common Mode (CM) AEFable to cancel the CM electromagnetic interference noise in a given frequency range. The active filter is analyzed based on the CM noise model of a boost converter. The first part of the study is devoted to the modeling of the electrical structure of the filter and the definition of component values. In this part, attenuation, design rules and stability of AEF are addressed in detail. The second part of the study is dedicated to the simulations and experiments to validate the proposed methodology. This step allows realizing a functional prototype that complies with the DO160 standard (aeronautics) up to 1 MHz

	Design Interactions of AC- and DC-Side Filters for Traction Drives with SiC Inverters By Hedieh MOVAGHARNEJAD	[View] [Download]
Abstract: This paper proposes a straightforward comprehensive design methodology for selecting anddimensioning parameters of common AC- Side filters and investigates the interactions between AC- andDC-side filters to avoid any over dimensioning in a traction drive system. A test setup has been implemented to validate the simulative investigations.

	Investigations on the Active Reduction of Common Mode Noise with Opposing Noise Sources By Philipp MARX	[View] [Download]
Abstract: Conventional filters needed for the electromagnetic compatibility lower the system power density by consuming additional space in power electronic setups. To increase the power density, alternatives for these filters are needed. If the power electronic setup offers the possibility to synchronize two opposing switching transitions, the common mode noise can be reduced without additional filters. In this case two opposing noise currents reduce one another by superimposition. For power electronic setups which do not offer the possibility to synchronize switching transitions, this paper presents an approach which uses additional half bridges as opposing noise sources connected to a replicated grounding impedance to create the opposing common mode noise. The main goal of the opposing noise source is to create similar potential changes as the power electronic setup over the replicated grounding impedance. The replicated grounding impedance emulates the grounding impedance of an ohmic inductive load with discrete elements. The achieved reduction of the common mode noise with this approach is evaluated with measurements.

	Modeling method for conducted noise flowing in power lines of DC / DC converter By Takato HATTORI	[View] [Download]
Abstract: This paper presents the modeling method of the conducted noise flowing in the input and output side power lines of DC/DC converter. The noise evaluation of DC-DC converters for automotive is based on the leakage current flowing in the power lines. The equivalent circuit of the conducted noise is derived by measuring and frequency analysis the leakage current flowing in the power lines. The noise evaluation simulation is performed by using the equivalent circuit. The usefulness of this proposed method for noise evaluation simulation has been confirmed by comparing the noise reduction effect of EMI filters in simulation and experiment.