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Automotive (Part 1)
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| Presentations | ||
Influence of HV-AN and Cage Filter in Emissions Measurements According to CISPR25 1VALEO, France; 2UTAC; 3AMPERE Emissions measurements in Automotive industry are classically performed according to CISPR25. In the last edition, specificities related to HV product were included. We identified that the influence of the cage filter and HV-AN structure on conducted and radiated emissions measurements between 100 kHz and 500 kHz was a critical issue. Evidence through experiments and analysis with simulation allowed to understand the root cause and to propose some countermeasures. These proposals and justifications will be proposed for the CISPR/D standardization committee. HV eDrive System Impedance Analysis for Insertion Loss Characterization of Active EMI Filters 1Valeo eAutomotive Germany GmbH, Germany; 2Brandenburgische Technische Universitat Cottbus-Senftenberg, Germany; 3Rimac Technology d.o.o., Sveta Nedelja, Croatia Active EMI Filter (AEF) design for high voltage applications pose several challenges. Theoretical models related to AEFs in literature are comprehensive and well-documented, however the influence of system parameters for practical high power applications has not been exhaustively researched yet. For effective filter design, practical technicalities and challenges should be explored extensively. To correctly predict the insertion loss characteristics of a given application, the investigation of system parameters is mandatory. This paper aims at thoroughly investigating the real impedances of the eDrive system, to predict the performance behavior of various AEF topologies. To assess the implications of load and source impedances, the frequency dependent impedances extracted from high power eDrive system are utilized to quantify the insertion loss characterization of AEF. Electric Vehicle HV-DC EMC Filter Loss due to Variations in AC-Load Configuration 1Institut für Theoretische Elektrotechnik, Hamburg University of Technology (TUHH), Hamburg, Germany; 2EMC Architecture Valeo Power Division, Valeo eAutomotive Germany GmbH, Erlangen, Germany; 3Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy The motor of an electric vehicle is connected to the inverter either by cables or busbars if the inverter and motor are integrated in the same housing. Instead of a motor, an equivalent lumped load may be used during EMC pre-compliance testing. Utilizing a SPICE-based simulation model, the conducted emissions of an electric vehicle powertrain are investigated with different AC-load configurations. Shielded AC-cables lead to increased parasitic inductance and capacitance on the AC side of the powertrain. On the HV-DC side of the inverter, EMC filters are required to comply with conducted emissions limits. The filter components, especially those filtering the common mode, are exposed to power loss due to the noise currents on the powertrain. Simulation results for AC-cable lengths 0-3 m show that the power loss in the EMC filter components shows a strong dependency on cable length. Evaluating Conducted Emissions up to 150 kHz from DC Electric Vehicle Charging Stations 1University of Twente, Netherlands, The; 2ElaadNL, Netherlands, The; 3VSL, Netherlands, THe Electric vehicle charging stations (EVCSs), which are known EMI sources, are expected to face upcoming standardized limits in the frequency range up to 150 kHz (also known as the supraharmonic spectrum). However, the adequacy of existing compliance tests for this range has received little attention thus far. This work examines the emissions of three high-power EVCSs under varying loads to examine whether existing compliance tests accurately assess their EMI levels. The results show significant differences between EVCSs, but existing compliance tests underestimated the EMI of all of them. Therefore, this study concludes that existing compliance test procedures are insufficient for low-frequency conducted emissions and thus need updating. | ||