Symmetric 270V DC Power Supply of a Universal Power Converter for Airborne Applications
Tutor / director / evaluatorCharzcobsky, Marius
Document typeMaster thesis
Rights accessOpen Access
The trend of the last years in the aeronautic industry is to reduce the weight of the commercial aircrafts. This weight reduction implies the need for more electrical power on board, since the heavy hydraulic drive system is replaced by and an electromechanical system. In order to supply this amount of extra electrical power, a Symmetric 270V DC Power Supply as a part of a Universal Power Converter is presented in this thesis. The Universal Power Converter generates the di erent airborne voltages - 32VDC, 270V DC and 230V AC- using as Fuel Cell Stack as raw energy supply. The thesis focus on the the power conditioning system includes three DC-DC converters, generating regulated 270V DC output. The rst stage, a 3-phase interleaved full-bridge soft-switching converter, so called V6, boosts the Fuel cell voltages to a non regulated DC-Link bus with a voltage between the 320 and 580 Volts. The following stage, composed of a SEPIC converter and C uk converter parallel connected and in interleaving operation provide the regulated output. The three converters of the proposed conditioning system has been studied obtaining the design equations, sized the components and then veri ed with computer simulations using Matlab Simulink. The simulation results show regulation in the entire range of load with and excellent result within the Continuous Conduction Mode of the converter, a high performance of 93% at full load and a small current ripple at the Fuel Cell input, less than 17% peak-to-peak of the drawn current at full load. Furthermore, this thesis presents the Universal Power Converter at system level, to place the reader in context. The system supplied with a 16kW Proton Membrane Fuel Cell is designed to generate di erent outputs: 32Vdc at 5kW, 270Vdc at 16kW and 230Vac at 16kW; supplying at a time three, two or one voltage. Furthermore, the selected Fuel Cell is introduced and a Simulink model is build to perform simulations of th econverters.
Tesina final de máster feta en col.laboració amb Polytechnic Institute of New York University