An Analytical Model for No-Load, Slotted, Axial Flux Surface-Mounted PM Machines: Air Gap Flux Density and Cogging Torque

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Abedini Mohamadi, Abdolmajid | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47437 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Oraee Mirzamani, Hashem; Taghipour Boroujeni, Samad
Abstract:
In the presented dissertation an analytical model is developed for the air gap flux density and the cogging torque in the axial flux surface-mounted PM machines. The slotting effect is taken into account in the magnetic flux distribution.The model is derived from solving the 2D Poisson' equation in the slotted air gap. To simplify the solution process, the concept of the uniqueness theorem is used to replace the slotted air gap by a slotless one and some surface current distribution. In addition, the separation of variables method is applied to the analytical solution of the Poisson equation. However, the proposed 2D analytical model is developed for the quasi 3D model by the well-known multi-slice modeling of AFPM machine. Maxwell’ stress tensor, as well the Lorenz equation is used to compute the machine cogging torque. The validity of the proposed procedure and the obtained results are verified by finite element analysis
Keywords:
Analytical Modeling ; Cogging Torque ; Uniqueness ; Lorentz Force ; Axial Flux Permanent Magnet Machine

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