Mohammadreza Ghazanchaei

  Simple construction with conventional three phase stator windings, solid rotor hysteresis ring and self starting torque are the main features of hysteresis motors. These advantages make the hysteresis motor suitable for applications, such as compressors, pumps, timing, and recording equipment. Hysteresis motor is a synchronous motor that uses the hysteresis characteristics of the magnetic materials. It is known that the magnetic characteristics of the motor could be easily affected by hysteresis material, structural dimensions and winding distributions. To consider those effects, it would be desirable to adopt the finite element method (FEM). In almost previous studies, 2D finite element (FEM) techniques for simulating of hysteresis motors have been developed. In this thesis the performance characteristics of conventional and hybrid hysteresis motor through a 3D finite element analysis (FEA) is provided. Meantime, In this study effect of different parameter variation on performance characteristics of a prototype motor is investigated and optimal parameter quantities are extracted through a 3D finite element method (FEM). Based on output results of sensitivity analysis and with consideration on objective functions and constrains a new motor is produced with optimal parameters. In this study, the application of complex permeability concept is implemented in order to model the hysteresis loop in the shape of inclined ellipse.

  Finally, in order to validate the simulation an experimental set up is provided and output characteristics of conventional hysteresis motor are measured.  

  Keywords : Conventional hysteresis motor , Finite Element Model, Complex Permeability, Sensitivity analysis

  Dissertation presentation: Wednesday 20 October 2010

  Place: Class 305, Electrical Engineering department