Session 3: EMC Simulations
The modelling of electromagnetic systems has become both feasible and affordable in the last twenty years.
This has been enabled by the increasing availability of powerful computing in addition to a number of software systems which enable, not only the solution of the physics of the interaction of electromagnetic fields with the geometry of concern, but also the modelling of that geometry.
There are still a number of challenges in the use and acceptance of the modelling of electromagnetic interactions, including validation, visualisation and assimilation of results and the modelling of diffusive materials and non-linearities.
Session 3, Speaker 1
Jason Watkiss, Senior Principle EMC Specialist, Rolls-Royce
Modelling of power converter cable related conducted and radiated emissions
Modelling of RF Conducted & Radiated Emissions in a power converter can be simplified by using measurements of common mode impedance to ground of the electrical machine and its common mode voltages. The presentation aims to show these measurements, and how they can be imported into a computer model using 3D EMI tools to predict RF Conducted & Radiated Emissions. Focus will also be on the cabling modelling from the electrical machine to the converter. This methodology is consistent with EMI modelling approaches adopted in IEEE papers and other sources.
Jason Watkiss was born in 1970, in Leicester, England (UK). He received a BEng (Hons) degree in Electrical and Electronic engineering from Nottingham Trent University, U.K., in 1992 where he was a sponsored student at Hawker Siddeley Switchgear Ltd. Moving to Lucas Aerospace in 1998 provided experience on designing lightning strike protection for the NH90 composite helicopter application and then joined Rolls Royce in July 2005. During this period he has completed EMC and Power Electronic MSc modules at De-Montfort University (DMU) in Leicester and is now a Senior Principle EMC Specialist for Rolls Royce Control systems, working on a range of topics, from direct lightning effects to testing and modelling of electric generator and power converter technology. A chartered engineer and has written two patents on Flexible Printed Circuit (FPC) technology for Rolls Royce.
Session 3, Speaker 2
Dr Emma Kowalczuk,Jaguar Land Rover
Simulating Electromagnetic Compatibility of Modern Luxury Vehicles
Modern luxury vehicles are connected, autonomous and electrified - to enable these key features systems must coexist without high level of interference – the fast switching power electronics which enable electrification must act in harmony with the army of antennas required for connectivity. Understanding the best design and placement of antennas, cables and modules inside a car is a challenge – but Computational Electromagnetics (CEM) can be used to get the design right first time.
An overview of how EM simulation is applied to EMC applications at Jaguar Land Rover will be presented – with insight into issues related to electrified systems such as battery enclosure design and cable coupling approaches summarised. Lastly, the future challenges that can be addressed by EM Simulation will be highlighted.
Dr Emma Kowalczuk
Dr Emma Kowalczuk has been with Jaguar Land Rover (JLR) since 2015 and helps deliver Electromagnetic CAE capability development in the company. She has a strong background in installed antenna placement simulations on large platforms and has been involved with investigating cable simulation methods for in-vehicle EMC analysis.
Prior to JLR, she received her M.Eng and Ph.D in Electrical Engineering from Loughborough University and also worked as an electromagnetics application engineer for Computer Simulation Technology presenting and publishing the benefits of EM Simulation for a wide range of industrial and academic areas including lightning strike simulation techniques with respect to composite aircraft.
Session 3, Speaker 3
Graham Roberts, Senior Simulation Engineer, Turntide Technologies
Validated Simulation of Conducted Emissions from Transport Power Electronics
This talk will present work on reduction of development cost and time to market by simulation of electromagnetic compatibility using Ansys Electronics Desktop. Conducted emissions from a transport switch-mode power supply were simulated using a combination of lumped component and finite element analysis, mimicking a CISPR25 conducted emissions test. Results were compared with an equivalent test on a physical prototype. Changes to the PCB layout were made and re-simulated, indicating a significant improvement. A physical prototype was built using the improved PCB and tested. A comparison was made between the improvement seen in simulation and that seen during test.
Graham graduated from Warwick University in 2006 with a 1st Class Honours Degree in Electronic Engineering, and in 2011 with a PhD in power electronics. He has been a member of the IET since 2006, is a Chartered Engineer and a member of the IEEE.
After a very brief stint in academia, he worked as a power electronics engineer for General Electric, Dyson, Benchmark Electronics and BorgWarner on power electronics products handling powers of a few watts to several megawatts.
He now works for Turntide Technologies as a senior simulation engineer using Ansys software to model transport power converters and inverters, focussing on EMC.
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