Bega - as a starter/generator with vector control

Abstract

The main objectives of the thesis are: • To present an overview of the automobile electrification trends. • To find an algorithm for battery internal resistance estimation. • To introduce a novel, on-line battery state-of-charge algorithm for valveregulated lead-acid batteries. • To develop a simulation model for the complete BEGA control system including the three-phase PWM inverter and dc-dc excitation converter • To implement a vector control strategy for BEGA. • To prove that BEGA has a very large constant power speed range at unity power factor operation. • To find a minimization strategy of the copper losses in BEGA. • To find a strategy for improvement of BEGA electromagnetic torque response • To develop a sensorless control strategy for BEGA operation in a wide speed range.