چكيده به لاتين
The concept of magnetic gears (MGs) as a tool for matching speed and torque, have superior advantages than mechanical gears and get a great attention in recent years. In this thesis, a new structure of MG named arcuate double sided MG (ADSMG) is introduced and modelled. This structure is inspired by two axial flux and radial flux topologies. Thus, at first, the concept of axial flux and radial flux structures are introduced and then the operational specifications, especially torque of MG, will be extracted and analyzed. In order to validate the results of finite element method (FE) numerical analysis and introduce a model to process the static and dynamic studies, an analytical model based on Laplace and Poisson’s equations using sub-domain technique will be introduced. This model don’t have enough accuracy for decision-making in the design process due to the some simplifications. So a new method named improved quasi 3-D analytical method inspired by combination of numerical FEM and analytical method, is introduced. To demonstrate the power of the proposed method, skew methods are studied to reduce cogging torque. Results are compared with the 3-D FEM. Then in a case study, in order to improve the gear’s specifications, bulk superconductor is applied to modulate magnetic flux in air gaps and using it’s magnetic shield property.
Finally, with respect to the introduced relationships and models in previous chapters and their reliability, the ADSMG structure and its performances are presented in details. An IQAM model has been extracted for it. The results of this structure, clearly show its superiority compared to existing models. The model is applied and optimized for utilization in a typical wind power project. The effect of different magnetic materials as the most expensive material in MGs and corresponding losses are studied. Eventually, results of thesis are analyzed and compared. Ahead achievements and opportunities to continue the pass are stated.
Keywords: magnetic gear, finite element method, analytical method, quasi 3-D analytical method, arcuate double sided, axial flux, radial flux, torque, torque density, magnetic field.
