Session 2: EMC Design for the Power & Electronics Applications
Dr Min Zhang
Chair: Dr Min Zhang – EMC consultant, Mach One Design ltd, an association of Cherry Clough Consultants
Session description: This session covers the design aspect of EMC engineering. Proper design of a product can make the difference between a product passing the EMC tests during the first cycle or not. Traditional EMC design practices have been simply rule-based, but the rules are difficult to implement for various reasons. Three speakers from three industries will talk about the EMC design challenges and considerations in this session.
Session 2, Speaker 1
Dr Yegi Bonyadi – Senior Power Electronics Engineer, Lyra Electronics Ltd
EMC Design Considerations for a High Power SiC MOSFET Based Converter
This talk addresses the electromagnetic compatibility issues of high power SiC MOSFET based Dual Active Bridge DC-DC converters for automotive application. The high switching frequency in combination with sudden changes in voltage “dv/dt” or current “di/dt” levels generate higher order harmonics, which cause Electro Magnetic Interference. Measures to improve the EMC capability, converter layout design considerations and suggestions to supress EMI noise to facilitate EMC compliant DAB converter will be discussed.
Dr Yegi Bonyadi
Dr Yegi Bonyadi received the Ph.D. degree in the field of Silicon Carbide power electronics from the University of Warwick in 2019. She currently works as a senior power electronics engineer at Lyra Electronics Ltd, where she focuses on design of automotive high power DC-DC converters, on-board chargers and cost effective EMC design. Her interests include power converter design, automotive power inverters, Hybrid/electric vehicles, power electronics modelling, and Wide-Bandgap semiconductor power devices.
Session 2, Speaker 2
Dr Rob Weller – Principal Consultant, Electrical Investigation Ltd
Power Frequency EMC considerations for Low Carbon Technologies (LCT)
The move towards net zero (decarbonisation) in the UK is gradually forcing more heat pumps, electric vehicles, low energy appliances and lighting, and renewable generation to connect to the electricity distribution network. Collectively these ‘Low Carbon Technologies’ produce mains borne harmonic currents, resulting in voltage distortion and other issues for Distribution Network Operators. The move away from ‘linear’ loads on ageing networks has also introduced constraints and, in some cases, prompted network reinforcement spend earlier than originally anticipated.
This presentation gives a general overview of issues and discusses some solutions, together with impacts for the wider EMC community.
Dr Rob Weller
Dr Rob Weller studied Electrical Engineering at Cambridge University, where he also completed his PhD (in Applications of Superconductivity) in 1999. He is a Chartered Electrical Engineer and has worked as a technical specialist for most of his career. He has worked for, and with UK Network Operators, Industry Bodies and Utility companies to provide technical consultancy and policy services. He has served as a forensic investigator and expert witness and has investigated over 300 electrical fires and/or shock incidents. He maintains links with academia and leading UK consultancies and organisations such as IET and ENA to carry out research and development work to improve electrical safety.
Session 2, Speaker 3
Paul Wolstenholme, Patryk Olesinski, EMC Technical Consultants, 3C Test Ltd
Automotive Electrification, the Associated Vehicle-Level EMC Challenges and Techniques to Resolve
This talk addresses the common EMC issues experienced with electrified vehicles, including those that often prevent compliance against the legal certification requirements (e.g., UNECE Regulation 10.06). It also highlights the various techniques that can be used to resolve these issues, with a particular focus on the integration of high voltage systems into the vehicle electrical architecture to assist with improving EMC performance.
Paul started in the industry in 2011 as an EMC Test Engineer, before developing through various roles within a test lab environment and more recently working for a UK based automotive OEM. Experienced in both component and vehicle-level automotive EMC test requirements, test methods and problem resolution techniques. Paul has worked with a number of global OEMs, and their suppliers, delivering EMC compliance for multiple vehicle programmes.
In January 2020, after 11 years of working in the automotive EMC sector, Paul launched and now leads the EMC Technical Consultancy department within Applus+ 3C Test.
Specialising in resolving the EMC issues associated with electrified vehicles and High Voltage components, Paul actively encourages and supports automotive manufacturer’s with ensuring greater EMC engagement in the early design phases of these components and new vehicle electrical architectures to ensure that EMC best practices are instilled into the design of both the components and vehicles.
Registered in the UK No 10505134