Compliance and Safety Requirements of Wireless Electric Vehicle Charging systems and computer based design methods
Dr. Daniel Kuerschner
Qualcomm Halo Technology, Germany
Daniel Kuerschner received Diploma and Ph.D degrees in electrical engineering from the Otto-von-Guericke-University of Magdeburg in 2005 and 2009, respectively. He worked in the field of wireless power transfer at the Institut f. Automation und Kommunikation (Magdeburg) from 2004-2011 and at Paul Vahle GmbH (Kamen) from 2011-2013. There, he was responsible for the design and the development of power electronics, passive components and the overall system for a wide range of applications, from milliwatt up to 100 kW power transfer. In 2013, he joined Qualcomm Halo (Munich) and is responsible for simulation, design and EMC/EMF of wireless electric vehicle charging (WEVC) systems. Daniel Kuerschner has more than 14 years of experience with inductive power transfer technology, particularly with power electronics, magnetics, electromagnetic compatibility and simulation methods. In these fields he has published more than 30 scientific papers and he gave more than 40 lectures at workshops, seminars and conferences. For more than 10 years he is member of several scientific and industrial panels and standardization bodies, such as IEEE, SAE, CISPR and German VDE, ZVEI and DKE.
Abstract
-- Chair: Dr Michal Kosik (Czech Technical University in Prague, Czech Republic) -- The tutorial starts with introducing the Qualcomm Halo design process of wireless electric vehicle charging (WEVC) systems. It is presented,... [ view full abstract ]
-- Chair: Dr Michal Kosik (Czech Technical University in Prague, Czech Republic) --
The tutorial starts with introducing the Qualcomm Halo design process of wireless electric vehicle charging (WEVC) systems. It is presented, which sequential and also iterative steps are needed and included in the process and how those steps can be automatized by using a workflow combining ANSYS FEM simulation, MATLAB scripts and circuit simulation. For the design process the user defines several parameters, objectives and restrictions. Based on those, an algorithm seeks for target design candidates, which do meet a set of performance, compliance and safety requirements. For WEVC systems, such compliance and safety requirements for example are meeting a maximum magnetic leakage field (EMC/EMF) at a defined distance and also meeting a maximum magnetic flux density on the base pad surface (thermal safety). In the tutorial, reasonable assessment approaches and limits for the listed requirements are derived and proposed. Specifically, in the area of EMC it is explained why existing approaches for a compliance evaluation cannot be used for WEVC systems. Because of the working principle and the specific operation conditions of WEVC systems (e. g. required magnetic field in the air gap, resonance operation) it is concluded and suggested that the existing assessment methods must be adjusted, that the test setup and environment require further specification and that an additional limit margin might need to be introduced. In the tutorial, it is provided how these challenges are addressed in international WEVC and EMC standardization bodies. In the end, the presented methods for WEVC system design and compliance assessment are illustrated based on an example dynamic wireless charging system.
Session
TU-2 » Tutorial 2 (16:15 - Sunday, 3rd June, M-2203 (Lassonde Building))
