Analysis of permanent magnet synchronous machine for integrated starter-alternator-booster applications

Abstract

In the last decade due to their high efficiency and reliability, permanent magnet synchronous machine are widely used in automotive applications. There are two main reasons for this trend: the reduction of the fuel consumption and the increase of the travel comfort. In this study we consider the approaches of electromagnetic design of a special topology of permanent synchronous machine (radial flux machine with outer rotor) suited for automotive applications. The study design requires some analytical analysis, followed by a numerical one in order to attain the performances of the proposed machine in all three cases (starter-alternator-booster). A thermal analysis is required in order to determine the thermal requirements for the automotive applications.