Development of a Switched Reluctance Motor for Automotive Traction Applications

This paper presents an advanced development of a switched reluctance motor/generator for automotive traction applications. The performance, efficiency and peak torque characteristics of switched reluctance machines, combined with its typical robust, low cost construction make this technology an attractive alternative to other motor types typically chosen for traction applications. In this research, a combined optimization was conducted on the design and control for a compact high torque assist motor/generator aimed at application in full hybrid vehicles. From the early design stage, known challenges related to switched reluctance motors such as torque ripple, vibrations and acoustic noise were addressed by a combined approach of innovative mechanical design features and state of the art control of the motor excitation. The motor was manufactured and characterized, with resulting characteristics covering the application requirements and matching simulated performance and efficiency. The motor was integrated into hybrid- and battery electric test vehicles where performance, NVH levels and durability are assessed while demonstrating the potential of this motor for automotive traction applications. Copyright 2010 EVS25.