Eddy Current Losses Calculation in Rotor Back Iron and Magnet for Concentrated Winding Permanent Magnet Generator

The concentrated winding is proposed to replace the distributed winding due to the advantages in a manufacturing process. It is easily wounded by a machine in the former and the impregmentation process that can be carried out separately for each individual coil. These advantages can lead to the automation process in winding processes, reduced time and cost in generator manufacturing. One of the problems of the concentrated winding generator is eddy current losses due to the fact that air gap flux in the concentrated winding contains much more harmonics compared to the distributed winding. These losses should be kept in within the acceptable level of heat removing capability of the generator. Otherwise, higher temperature of magnet could influences the remanence flux of the permanent magnet. In this study, two methods of eddy current losses calculation, analytical and finite element (FE), are presented. Finite Element Method has some advantages due its capability to handle the geometric problem and non linear material which is difficult to incorporate in analytical calculationElectrical Power EngineeringElectrical Engineering, Mathematics and Computer Scienc