Abstract
A dq model representation of segmented secondary linear flux switching motors (SSLFSMs) is investigated. In these motors, the armature and field windings are both mounted in the primary slots and the secondary is only composed of simple laminated segments. This type of motors inherits both merits of high force density from linear synchronous motors and simple secondary structure from linear induction motors. Due to its simple and consequently low-cost secondary structure, it is applicable to transportation systems like Maglev. Position and speed control of this motor is essential for rail transportation applications. Therefore, derivation of an appropriate analytical model for control purposes is needed. An analytical method to represent the dq model of SSLFSMs is presented. Employing this method, the d- and q-axis inductances and the developed electromagnetic thrust and normal force are calculated. To verify the proposed model, three different finite-element method-based models are studied and one is chosen as the basis for comparison. All results obtained by the analytical model are verified by this finite-element method-based model. Moreover, a prototype of SSLFSMs is built to validate the study.
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