Implementation of Different 2D Finite Element Modeling Approaches in Axial Flux Induction Motors

• Published in: Electric power components and systems 2023-11, Vol.51 (19), p.2385-2396
• Main Authors: Özsoy, Mustafa, Kaplan, Orhan, Akar, Mehmet
• Format: Article
• Language: English
• Subjects: 2D modeling; Axial flux; Axial stress; Design; Finite element method; finite element modeling; induction motor; Induction motors; inner rotor; linear; Mathematical models; Modelling; outer rotor; Rotors; Three dimensional models; Torque; Two dimensional analysis
• ISSN: 1532-5008; 1532-5016
• DOI: 10.1080/15325008.2023.2240806

Axial flux induction motors (AFIM) are gaining popularity due to their higher torque density than radial flux motors. However, axial flux motors have a more complex structure than radial flux motors due to their diameters expanding from the inside out. Before manufacturing, designers have two contradictory goals in the simulation phase. These are high accuracy and short analyses time. The finite element method is a commonly utilized technique for verifying designs. However, in the early stages of AFIM design, a 2D radial flux modeling approach can yield faster results. This approach is well-suited for radial motors, where 2D analysis is widely employed to achieve accurate designs within reasonable analysis times. However, for AFIM with a non-axisymmetric flux path, the application of 2D analysis poses some difficulties. This study compares three modeling approaches, linear, inner rotor and outer rotor modeling approaches to a 3D model and examines their steady-state performance. The results show compatibility in performance data, with some deviations in the torque-speed curve for inner rotor modeling and outer rotor modeling approach methods, which can be reduced by resizing the slots. Overall, acceptable errors and consistent results were achieved between the models.