No abstract

During the design of permanent magnet synchronous machines (PMSM), the first step that engineers have to do, concern the choice of the topology, i.e. the slot/pole combination. Given that the performances of the machines are strongly related to this combination, the choice has to be fully justified. Fractionalslots (FS)-PMSM offers several advantages and have been focused by a lot of researches. However, depending on the topology, these machines could have major drawbacks as magnetic noises, high iron and eddy-current losses and low fault-tolerance. The aim of this paper is to give an overview of each machine considering the most common slot/pole combination in order to single out if a topology is suitable or not. A special focus is also done on the homopolar component which traduces the machine's fault tolerant capability required for embedded applications.

This paper deals with an original design methodology of Permanent Magnet Synchronous Machines (PMSM) using multistatic reluctance network modeling. Traditionally, models based on reluctance network use d-q axis components in order to calculate the fundamental values of the torque and the back-emf. In this study, the reluctance network permits an angular rotation between rotor and stator to thereby extract the magnitude of the harmonics which are necessary for better optimization results. Besides, three different methods of calculation of the air-gap reluctances are presented and applied to the reluctance network. Then, simulation results are compared to Finite Element Analysis (FEA) in order to finally determine the best method. Ultimately, the proposed model shows precise and very fast results making it suitable for geometry optimization and to help designers obtaining a better sense of machines behavior.