Power Electronics Europe February/March 2022

22 PCIM EUROPE 2022 www.pcim-europe.com Issue 1 2022 Power Electronics Europe www.power-mag.com design requires special attention to lowering total system losses as well as superior thermal management to be able to extract and remove the generated heat in a very limited area. Recently, a 1kW high efficiency high power density LLC converter was presented achieving a power density of 1.227 kW/in 3 peak efficiency of 97.5 % and a full load efficiency of 96.7 %. Analysis of various loss components along with the latest generation of GaN FETs, show promising performance improvement to further shrink the size of the converter presented in earlier work. Hence, this paper will present an ultra-high power-density converter with the full load power density of greater than 5 kW/in 3 . The paper will explain the steps taken to achieve the ultra-high power-density. The second paper describes a “500 kHz SiC- and GaN-Based Dual Active Bridge with Voltage Conversion Between 48 V and 650 V” by Patrick Lenzen, TU Dortmund University/Germany. Bidirectional DC/DC converters are used in many applications. The DC/DC converters should be compact, which can be achieved with high frequencies. This paper presents a 2 kW Dual Active Bridge converter operating at 500 kHz with a high conversion ratio of 15. A peak efficiency of 96 % is reached. The converter uses wide-bandgap semiconductors on the input and output side, which leads to a high dv/dt and reduces switching losses at hard- switching operation points. However, ringing occurs at low power which can be reduced with the presented asymmetric dead time between the low- and high-side switch. Both SiC and GaN devices are used to handle the high voltage on the DC bus as well as the low voltage of the supercapacitor. Moreover, the switches allow switching frequencies of 500 kHz. The two other papers are entitled “Clamped Topology Morphing of the Isolated Full- Bridge Converter for Reduced Rectifier Semiconductor Blocking Voltages and Transformer Volume” by Paderborn University/Germany, and “3-Level Switched Capacitor Resonant Converter-Based DCX” by Federal University of Santa Catarina/Brazil. More in our next issue. AS Name: Company Name: Address: Post Code: Tel: Total Number of Copies @ £ p+p Total £ Drives S & S Hyd H/B Pne H/B Ind Mot Comp H/B H/B Air QUANTITY QUANTITY Hydraulics & Pneumatics There are now 6 of these handy reference books from the publishers of the Drives & Controls and Hydraulics & Pneumatics magazines. Published in an easily readable style and designed to help answer basic questions and everyday problems without the need to refer to weighty textbooks. We believe you’ll find them invaluable items to have within arms reach. From the publishers of QUANTITY QUANTITY QUANTITY 2-5 copies £4.30, 6-20 copies £4.10, 20+ copies £3.75. QUANTITY PRACTICAL ENGINEER’S HANDBOOKS HYDRAULICS INDUSTRIAL MOTORS SERVOS AND STEPPERS PNEUMATICS COMPRESSED AIR INDUSTRIAL ELECTRIC DRIVES PLEASE ALLOW UPTO 28 DAYS FOR DELIVERY $&! -!.5&!#452).' -%$)! ,4$ 4HE (IGH 3TREET 4ONBRIDGE +ENT 4. "% Postage and Packaging: 1-3 copies: £2.99 4-6 copies: £4.99 7 or more copies: £6.99 If you would like to obtain additional copies of the handbooks, please email info@dfamedia.co.uk or call us on 01732 370340.Alternatively you can return the completed form below to: Engineers Handbook, DFA MANUFACTURING MEDIA LTD, 192 The High Street,Tonbridge, Kent TN9 1BE #HEQUES SHOULD BEMADE PAYABLE TO $&! -ANUFACTURING -EDIA ,TD AND CROSSED ! # 0AYEE #OPIES OF THE HANDBOOKS ARE AVAILABLE AT a PER COPY $ISCOUNTS ARE AVAILABLE FOR MULTIPLE COPIES