Abstract
A novel dual three-phase permanent-magnet linear synchronous machine (DTP-PMLSM) is proposed for the large capacity ropeless elevator, where two sets of windings have 30 electrical degrees phase shift in space. First, the topology of DTP-PMLSM with 12-slot/11-pole (12 s/11p) combination is introduced. Second, the influence of each main parameter on thrust force performance is investigated by single variable sweeping method, and then DTP-PMLSM is optimised by global optimisation method. Moreover, the electromagnetic performance is predicted and analysed by two-dimensional (2D) finite element method (FEM) in detail. Compared with conventional single three-phase PMLSM, the proposed DTP-PMLSM shows better force performance. Furthermore, the analysis results are compared with 3D FEM which includes the transverse end effect. Finally, a 12 s/11p prototyped machine is built and tested to validate the theoretical analyses.
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