Comparison of Cage Secondary Topologies on Thrust Performance for Linear Doubly-Fed Machines

A comparative study of cage secondary topologies on thrust performance for linear doubly-fed machine (LDFM) are carried out in this paper. Firstly, the feature of different secondary topologies and the method of obtaining equivalent circuit parameters are introduced. Then, the thrust performance of different secondary topologies with the same primary are analyzed by both finite element method (FEM) and equivalent circuit model. Finally, the relationship of secondary topologies, equivalent circuit parameters and thrust performance is further illustrated.