Application-optimal design of a permanent magnet synchronous machine with regard to different load profiles

Abstract:
Effective design and optimization has been the subject of research in the field of electric machines for years. There are various optimization approaches. In all methods, a trade-off must be made between the required optimization time and the accuracy of the results. However, due to the continuous increase in available computer capacity, computing times are becoming even shorter. Optimization with FEM is thus becoming increasingly attractive. Especially in the field of electric drive systems, it is increasingly necessary to consider load profiles instead of a single load point. Only this allows an exact definition of requirements and the subsequent design as well as optimization of electric machines. The aim of the paper is to develop a universal methodology for the automated design of electric machines of any power class with regard to a load profile. For this purpose, it is planned to consider a drive of an autonomously driving electric vehicle as an example. Due to the low speed of the vehicle, the biggest task is to overcome gradients in the driving profile. Therefore, the consideration of the elevation profile of the driving route is necessary for the design of the traction drive. The paper demonstrates the machine design based on two different elevation profiles.