Electromagnetic models for slotless PM synchronous motor drives

A model defines the relationships amongst the parameters which govern the behavior of a system over the operating range of interest. This paper presents magnetic, electrical and electro-mechanical models to support the design of slotless, star-wound, permanent-magnet synchronous motor drives. Modeling assumptions and limitations are discussed. The validity of these models, under the given assumptions, is established by reverse engineering an existing motor and comparing its measured performance with the model predictions, and through comparison with the results of a two-dimensional finite-element analysis program