IEEE Power Electronics Society Live Webinar Series 

"GaN Transistors-Crushing Wireless Energy Transfer" by Alex Lidow and Michael A. de Rooij 

alex lidowAlex Lidow


Wednesday, June 4, 2014 10:30 am 
Eastern Daylight Time (New York, GMT-04:00) 

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 Abstract: In this seminar eGaN FETs are employed and compared in highly resonant wireless energy transfer where various topologies, such as the current mode class D, single ended class E, and a novel high efficiency voltage-mode class D. The comparisons will be based on efficiency and sensitivity to load and coil coupling variations. Each of the topologies has been experimentally tested based on using the same source and device coil set with the same device rectifier. The experimental units operate with loosely coupled coils at 6.78 MHz (ISM band) and deliver between 15 W and 30 W (depending on topology). The designs of the amplifiers demonstrate ways that the device parameters, such as COSS can be absorbed into the coil or matching network.

Alex Lidow is CEO of Efficient Power Conversion Corporation (EPC). Prior to founding EPC, Dr. Lidow was CEO of International Rectifier Corporation. A co-inventor of the HEXFET power MOSFET, Dr. Lidow holds many patents in power semiconductor technology and has authored numerous publications on related subjects. Lidow earned his Bachelor of Science degree from Caltech in 1975 and his Ph.D. from Stanford in 1977.

de Rooij
Michael A. de Rooij

Michael A. de Rooij is Executive Director of Applications Engineering at Efficient Power Conversion Corporation (EPC). He received his Ph.D. from the Rand Afrikaans University (now called The University of Johannesburg), South Africa in 1998. Prior to joining EPC he worked at Windspire Energy where he helped develop the next generation of small vertical-axis wind turbine inverters. From 2002 to 2008, Dr. de Rooij worked as a Senior Engineer at the GE Global Research Center, located in Niskayuna, NY. Dr. de Rooij’s research interests and activities include, solid-state high-frequency power converters and devices, utility applications of power electronics, uninterruptible power supplies, integration of power electronic converters, power electronic packaging, induction heating, photovoltaic converters, Magnetic Resonance Imaging (MRI) Systems and gate drivers with protection features. Dr. de Rooij is a Senior Member of the IEEE.