Design Of Wound Field Synchronous Machine As An In-Axis Motor For Electric Vehicle Traction System

This paper presents the design and performance analysis of a wound-field synchronous machine as an in-axis motor for electric vehicle traction system. The design target is that maximum output power is 60kW and the power density is more than 0.95 kW/kg. To improve power density without permanent magnet, the gear was used. Furthermore, to keep the inside of the vehicle structure, two motor was used for one traction system. Therefore 30kW-grade motor was designed. In the initial design process, equivalent magnetic circuit method was used. For the detail design to reduce torque ripple, response surface methodology was used.