Algoritmo para frenagem regenerativa de uma máquina síncrona de imã permanente / Algorithm for regenerative braking of a permanent magnet synchronous machine

AUTOR(ES)

Adriana Cáceres Delgado

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

02/08/2010

RESUMO

Environmental protection and optimal energy resources are great activity research areas. As a result of these researches, electric vehicles (EVs) and hybrid (HEV) developments have been accelerated. They have challenging problems such as low autonomy, power conversion, vehicle control, energy management and distribution within it, as well as the esthetic and mechanical design and also the economic issues. This set of problems inspired this master’s project which is aimed to study and elaborate an algorithm for regenerative braking (RB) in a synchronous permanent magnet brushless machine (BLDC). Motivated in the RB strategy characteristics that provides to the EV, such as, autonomy increased, mechanical and electronic performance improvement just when the RB is activated and part of the kinetic energy is recovered through the electric maquine as a generator. This work was developed in several stages: mainly cover the regenerative braking concepts; study the BLDC motor from its model, driver and outstanding features identification respect others electric motors. Followed by the mechanical design of the system, which includes the transmission and inertia, to be included in the simulated model. Just as the development of the algorithms for the motor drive, where will be monitored speed and rotor position, in order to control its acceleration and deceleration. Subsequently a management regenerative braking algorithm, which monitors the engine state, and excecute the logical decisions for redirecting the energy, and for braking control. As a result it was found that when the electrical machine operates as a generator part of the kinetic energy is recovered during deceleration. And also it was able to prove that the algorithm manages the whole process operation since the acceleration, constant velocity and deceleration step by step, while minimizing energy consumption in every downturn.

ASSUNTO(S)

veículos elétricos máquinas elétricas síncronas simulação por computador energia - fontes alternativas electric vehicles synchronous elctric machines computer simulation energy

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