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Axial field flux-switching magnetic gear composite motor (AFFSMGCM) combines the advantages of axial field flux-switching permanent magnet machine (AFFSPMM) and magnetic gear (MG). In order to reduce the time and cost of design and optimization due to the complicated structure of AFFSMGCM, the nonlinear varying-network magnetic circuit (VNMC) is researched and developed for the machine. First, the topology of AFFSMGCM is introduced in details. Then, the accurate VNMC model is established with consideration of magnetic saturation and leakage flux. Finally, multi-objective optimization of AFFSMGCM based on VNMC is carried out to obtain large torque and low torque ripple. Meanwhile, the finite element analysis (FEA) method is used to validate the VNMC model. It is shown that the calculation results based on VNMC model are similar to those of FEA. The proposed VNMC improves the efficiency and accuracy of the design and optimization of the machine.

This paper presents the optimal structure design and magnetic force analysis of a ropeless elevator model that employs permanent magnet linear synchronous motors (PMLSMs) with the structure of a double-sided long-stator. To obtain the optimal structure, the combination of response surface methodology and 2-D finite element analysis, which can solve the problem effectively without consuming much time, is utilized to estimate the design parameters of PMLSM. The numerical calculations and the experimental results are reported to validate the applicability of this double-sided long-stator type PMLSM for a ropeless elevator system. [ABSTRACT FROM PUBLISHER]