کنفرانس بین المللی ماشین و محرکه های الکتریکی

صفحه اصلی / The 3rd International Conference on Electrical Machines and Drives

Stator structural analysis of an in-wheel permanent magnet electric motor for sports utility vehicle (SUV) via multi-physics procedure

نویسندگان :

Saeed Rostami¹ Mohsen Nikfar²

1- MAPNA Pars company 2- MAPNA Pars company

کلمات کلیدی :

electric vehicle،in-wheel machine،permanent magnet machine،structural analysis،multi-physics analysis،finite element method

چکیده :

In this paper structural (strength) analysis of an in-wheel electric motor is investigated using multi-physics analysis. During analysis, stresses are evaluated for each component in any load step, and also safety factors are extracted, and critical stress resultants are compared with admissible yield strength for each body. In such electric motors, since the output torque significantly has not high value, and compactness is an important factor in design, the common method for binding up the core to the frame is the shrinkage process. Since the accuracy of machining tools usually has some uncertainties, the admissible shrinkage value is expressed as a range. In this work also mentioned range is introduced, and the shrinkage temperature is calculated. Also, the contact status (between the frame, and the core) is checked to remain as a stick contact (i.e., the core does not slide or roll relative to the frame). In this study a finite element model is established. Thermal contour and electromagnetic loads are calculated by the FE software in CFX, steady state thermal, and Maxwell 3D modules in the ANSYS workbench. Then these contours are mapped to structural analysis in FE software. Mechanical loads are computed in critical (for example turning around a square or a spiral road, while the automobile is under overturning threshold) states according to particle dynamics equations, and are combined with magnetic and thermal loads in various load steps. Then the integrity and safety of the structure is investigated in each load step.