A Large Input Voltage Range 1 MHz Full Converter with 95 % Peak Efficiency for Aircraft Applications

Conference: PCIM Asia 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/27/2017 - 06/29/2017 at Shanghai, China

Proceedings: PCIM Asia 2017

Pages: 7Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Quentin, Nicolas (University of Lyon / Ampere / Safran Group, France)
Perrin, Remi (INSA Lyon/Ampere, France)
Martin, Christian; Joubert, Charles (University of Lyon / Ampere, France)
Grimaud, Louis (Safran Group, France)

This paper presents a design methodology of a 50W isolated DC/DC converter serving as a power supply for aircraft equipment like a FADEC (Full Authority Digital Electronics Control). The particularity of this work is the design of a full converter regarding two antagonistic requirements which are a wide input voltage with an high efficiency. To fulfill those requirements an optimization regarding three different levels is done: 1- A suitable topology for wide input voltage range, 2- Proper technologies for high frequency operation and 3- A converter architecture to minimize the surface. A 50 W, 18 - 80 V input voltage, 1 MHz switching frequency converter is built using GaN transistors and a planar transformer. The proposed converter operates under optimized soft-switching conditions in order to minimize switching losses and reached a peak efficiency of 95 %. This converter is compared with 2 other converters: an hard-switching 400 kHz Flyback topology which is the industrial standard equipment and an 1 MHz soft-switching topology without the architecture optimization.