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Unified motor drive and battery charger for electric vehicles

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Resumo:Nowadays, Electric Vehicles are emerging as the most sustainable alternative to support the expected rise in the number of vehicles in circulation around the world, and to reduce the impact of the transportation sector on the environment. However, this is a technology that still has some limitations that restrict its mainstream adoption. Typically, an Electric Vehicle has a motor drive system and an on-board battery charger that allows charging its battery pack almost anywhere, as long as there is an electrical outlet available. However, this is usually a low-power charger in order to optimize the space and weight on-board the vehicle. As a result, this type of charging typically takes a couple of hours. The purpose of this MSc. Thesis was the development of a unified power electronics converter, capable of performing the roles of drive the electrical machine of an Electric Vehicle and also charging its battery pack, so as to optimize the space and weight of the power electronics components on-board the vehicle while also providing a faster charging operation. The first part of this MSc. Thesis consisted in the study of the state of art of the unified hardware solutions proposed, based on the use of the power electronics components of the motor drive system during the battery charging operation, since both operation modes cannot be performed simultaneously, except for regenerative breaking. Also the respective control algorithms that allow perform each operation mode, according with the solution proposed, were studied. The second part consisted in simulating the proposed unified solution and implementing a proof-of-concept prototype. In the proposed solution the battery charger is based on the use of a three-phase Voltage Source Inverter and the windings of a Brushless DC machine. With respect to the control algorithms, for the motor drive mode the Field-Oriented Control was chosen, while for the battery charging mode two control algorithms were chosen (one for single-phase charging and the other for three-phase charging), based on the Model Predictive Control. The obtained results validate the proposed solution. However, in the case of the electrical machine used in this MSc. Thesis, the values of the inductances of its windings compromise its use as an input filter.
Autores principais:Gomes, Ricardo Vieites Salgado Alves
Assunto:Electric vehicles On-board battery charger Unified solution Field-oriented control Model predictive control Veículos elétricos Sistema de carregamento Sistema unificado Controlo por orientação de campo Controlo preditivo
Ano:2015
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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