SIMULACIÓN DE UN SISTEMA DE RECUPERACIÓN DE ENERGÍA BASADO EN SUPERCAPACITORES CON APLICACIÓN EN TRACCIÓN ELÉCTRICA

Abstract

This thesis addresses the simulation of an Energy Recovery System (ERS) based on batteries and supercapacitors (SC) with application in an electric vehicle. The batteries are used as energy source and the supercapacitors as power source. The ERS is comprised of battery and supercapacitor modules connected by means of a bidirectional half bridge DC/DC converter which may work as a boost or buck converter. The energy management in the ERS is carried out by means of a battery and SC current closed-loop control based on the fact that the input and output powers of the converter are the same (lossless converter). The Electric Traction System (ETS) is comprised of a Permanent Magnet Synchronous Machine (PMSM) with surface mounted magnets, a dq average model of a power inverter is used to drive the machine which is mechanically coupled to an electric vehicle. The dynamic model for an electric vehicle is developed, that model accounts for the forces interacting in an electric vehicle and theirs impacts on the power supply are assessed. The speed profile used is based on the UN/CE driving cycle. A Field Oriented Control (FOC) is developed to control the machine.