Carregador veicular ultrarrápido baseado no conversor True Unit Power Factor

Abstract

The encouragement of several countries around the world to consume renewable energy has led to the increasing popularization of means of transport powered by electric traction, especially electric and hybrid vehicles. Thus, there are more and more challenges around the newest way of getting around in the world. Smaller plug-in electric and hybrid vehicles are fueled by batteries to power electric motors. Larger vehicles, such as buses, come up against the technological limitation of these batteries in terms of supported power and, therefore, other storage devices such as supercapacitors are being considered. Achieving high levels of efficiency, portability and robustness has been the focus of researchers from various entities around the world, so that electric and hybrid vehicles are consolidated once and for all as the most used form of transportation on the planet. Based on this, the objective of this work is to propose a solution for ultra-fast chargers for high power electric and hybrid vehicles that uses the True Unit Power Factor (TUPF) converter. The main advantage of TUPF is the absence of harmonics up to the 50th order, which makes it possible not to use filters a.a. capacitives, avoiding resonance points in the grid.

The work is developed through a design methodology of the TUPF controllers and the interleaved dc/dc converter based on the analysis of disturbance rejection, in addition to defining an adequate way to perform the ultrafast charging through the constant current and constant voltage method. During supercapacitor charging, a maximum TDD level of 0.54\% was obtained for the currents in the network and charging in 45 seconds with a 280 kW charger. Therefore, the validation of the TUPF as a rectifier for applications in ultra-fast recharges is observed, ensuring a good level of power quality in relation to harmonic distortions in the currents of the electrical network. The propositions presented here are supported by simulation results in simulation software and hardware-in-the-loop.