CONTENTS


Power Supplement 2012 Meeting new challenges


As always the power electronics industry is still battling against the main challenges it always has done, whether that is facing pressure for greater reliability and efficiency, or being driven by the need to reduce costs and meet carbon reduction targets.


Increasingly there is a need for more intelligent ways of power control and of providing simpler but observable designs. The industry is also facing an on-going crisis as the number of power electronics design engineers falls so there is a growing need among engineers to move to a more intelligent way of working that helps to simplify the design process. In this supplement we look at how you can simplify multi-chemistry battery chargers and how by employing sufficient knowledge, due diligence and attention to detail you can design your power


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12 16 18


supply to have the optimum performance when it comes to managing electro magnetic interference. We also look at how, by taking the right design


approach, power supplies can easily achieve higher power factor levels. Other articles look at power factor correction and selecting the right IGBT. Finally we look at the role of distributors in the design process at a time when the changing dynamics of electronics design present a serious challenge to engineers who are becoming increasingly reliant on the distribution channel. I hope you find the articles of interest and they help you identify some possible solutions when it comes to designing an efficient power solution..


Neil Tyler, Editor


Simplifying multi-chemistry battery


chargers 4 Archana Yarlagada discusses a flexible battery charging system that can be applied to a range of voltages, battery chemistries and battery charger profiles


Meeting new challenges 8 With the right design approach, power supplies can easily achieve higher power factor levels, as Bernie Weir and Frazer Pruett explain


The sum of many smaller parts 10 Electro Magnetic Interference is often seen as a black art, but the truth of the matter is that with sufficient knowledge, due diligence and attention to detail you can design your power supply to have the optimimum performance


Power factor correction 12 Milan Marganovic & Matthias Ulmann look at how you can use a synchronous power rectifier with a microcontroller to effectively manage voltage fluctations


Selecting the appropriate IGBT 16 For many applications IGBTs are the power devices of choice, but with so many devices to choose from a rigorous process of selection is crucial


The growing role of distributors in


electronics design 18 The changing dynamics of electronics design have presented a serious challenge to engineers who are becoming increasingly reliant on the distribution channel


Editor: Neil Tyler


neil.tyler@cieonline.co.uk T) 0845 013 8429


M) 07985 607730


Sales Executive: Robert Baughan robert.baughan@cieonline.co.uk T) 0845 313 0211


Design: Eric Ridden F) 0845 337 4960


Published by Specialist Media Ltd 8-10 Dryden Street, Covent Garden, London, WC2E 9NA


© Copyright Specialist Media Ltd 2012. All rights reserved. No part of this publication may be reproduced or transmitted in any form by any means, electronic or mechanical, including recording, photocopying or any information storage or retrieval system, without written permission from the Publisher.


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CIE Power Supplement 2012 3


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