Analysis on current information of wound field synchronous motor for electric vehicle

Abstract

This paper deals with the effective analysis method of current information of wound field synchronous motor (WFSM) for electric vehicle in order to have high efficiency in driving range. Current information for inverter is divided into three parameters of field current as well as d-axis and q-axis currents of stator windings. First, the search method of current information is showed by separating control regions of constant torque and constant power with each operation point. Finally, efficiency map of whole driving range having high efficiency is proposed by using analyzed current information.