Open Circuit Tooth Ripple Eddy Current loss in Smooth Laminated Poles

This paper reports onaresearchofphenomenaassociated with core loss due to tooth ripple flux in smooth laminated poles for the open circuit condition in ac machines. A model for investigation of the phenomena is described, incorporating a calorimetric technique for determination of loss location. There is also described a method for evaluating losses by utililizing a mathematical model which encompasses materials characteristics of the lamination material. Loss prediction and experimental results are in excellent agreement.