ISSUE 012 Winter 2021 Sigma Powertrain EMAX transmission dossier l In conversation: David Hudson l 48 V systems focus l 2021 Battery Show North America and Cenex-LCV reports l Everrati Porsche 911 digest l Switching insight l Motor laminations focus

ISSUE012 | WINTER2021 UK£15 USA$30 EUROPE€22 E-MOBILITY ENGINEERING THE COMMUNICATIONS HUB OF THE ELECTRIFIED POWERTRAIN Moving onup Returnofan icon Focuson the impactsof switching to48Vsystems HowEverraticarriedout its ‘resto-mod’ofaclassicPorsche911 Power couples SigmaPowertrain’sEMAX two-in- onemotorsolution forheavyEVs Up, up and away Publisher Nick Ancell Editorial Director Ian Bamsey Technology Editor Nick Flaherty Production Editor Guy Richards Contributors Peter Donaldson Rory Jackson Technical Consultants Ryan Maughan Danson Joseph Dr Nabeel Shirazee Design Joe Everley joe.everley@19-ninety.com Ad Sales Please direct all enquiries to Nick Ancell nick@highpowermedia.com Tel: +44 1934 713957 Subscriptions Please direct all enquiries to Frankie Robins frankie@highpowermedia.com Tel: +44 1934 713957 Publishing Director Simon Moss General Manager Chris Perry O ice Administrator Lisa Selley Volume Three | Issue FOUR Winter 2021 High Power Media Limited Whitfield House, Cheddar Road, Wedmore, Somerset, BS28 4EJ, England Tel: +44 1934 713957 www.highpowermedia.com ISSN 2631-4193 Printed in Great Britain ©High Power Media All rights reserved. Reproduction (in whole or in part) of any article or illustration without the written permission of the publisher is strictly prohibited. While care is taken to ensure the accuracy of information herein, the publisher can accept no liability for errors or omissions. Nor can responsibility be accepted for the content of any advertisement. SUBSCRIPTIONS Subscriptions are available from High Power Media at the address above or directly from our website www.highpowermedia.com . Overseas copies are sent via air mail. EDITORIAL OPPORTUNITIES Do you have a strong technical knowledge of one or more aspects of e-mobility systems? As we grow we are on the lookout for experts who can contribute to these pages. If that sounds an interesting challenge then don’t hesitate to explore the possibility of writing for us by emailing ian@highpowermedia.com ADVERTISING OPPORTUNITIES If you are looking to promote your company to engineers active in the electrification of vehicles, we have various advertising packages available to suit your needs. With a maximum of 25% of the publication allocated to advertising we offer a unique opportunity to become one of E-Mobility Engineering’s exclusive advertising partners, ensuring you are not lost in a crowded market. To discuss the opportunities and how we can work with you to promote your company please contact Nick Ancell. nick@highpowermedia.com +44 1934 713957 THE COMMUNICATIONS HUB OF THE ELECTRIFIED POWERTRAIN SUBSCRIBE TODAY visit www.highpowermedia.com ALSOFROMHPM T he COP26 conference in Glasgow, Scotland, in November highlighted the importance of zero-emissions transportation and the challenges that brings for aircraft. T he news in our Grid section (page 6) that Wright Electric has developed a 2 MW motor suitable for electric aircraft is a welcome advance to address these challenges. Coupled with aluminium-air batteries or a hydrogen fuel cell to provide power, the motor and inverter will be retrofitted into a 100-seater aircraft to demonstrate its use for large passenger aircraft. The laminations in the motor are a key element in achieving its performance, and we report on the technology of laminations in our focus on page 64, while the advances in switching topologies with wide-bandgap transistors to provide higher performance in the inverter are examined on page 56. The move to EVs is already well underway, and was clearly demonstrated at this year’s Cenex-LCV exhibition, as our coverage starting on page 46 shows. Part of that move has been to hybridise existing IC engine designs with 48 V technology, increasingly for heavy-duty trucks and construction equipment, as we show on page 32. The decisions at COP26 will see hybrids being gradually phased out and replaced by full battery EVs. But the legacy will be the move to 48 V power distribution networks that will help to improve the overall efficiency and reduce the weight of the vehicles. Nick Flaherty l Technology Editor The covers of this magazine have had a Cellomed antimicrobial coating applied. This coating is speci ically designed to stop the spread of bacteria on printed matter. It employs a silver-based formulation to protect against the survival of microorganisms on the print surface. Its anti- bacterial, anti-viral and anti-fungal properties will not diminish throughout the life of the magazine. 4 Winter 2021 | E-Mobility Engineering Intro | Winter 2021 Read a ll back issues online www.ust-media.com UST 40 :OCT/NOV 2021 UK £15,USA$30,EUROPE e 22 Self-control Focus on AI and machine learning Form and function Build tips for ground control stations Walking the walk Why the ANYbotics ANYmal D UGV has the legs for industrial inspections THE COMMUNICATIONS HUB OF THE RACING POWERTRAIN WORLD VALERIALORETI: ReimaginingFormulaOne fuel www.highpowermedia.com NOVEMBER/DECEMBER 2021 UK £15,US/CN$25,EUROPE e 22 PRO MOD PROGRESS Mike Moran redefines the drag racing pushrod V8 MONTE CARLO OR BUST What is the scope for all-electric rallying? VINCENT ON NITRO Exploring the amazing potential of a septuagenarian V2