• Analysis of the mechanical strength of the axial-flux electric drive
  • Analysis of the mechanical strength of the axial-flux electric drive




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    Сборник докладов международной научно техической конференции 21

    Analysis of the mechanical strength of the axial-flux electric drive
    A preliminary analytical calculation of the mechanical stability of the design of the 
    designed axial motor with a permanent magnets rotor is carried out to identify areas of the 
    greatest dynamic load of the engine components, in particular the stator and rotor, which 
    makes it possible to optimize the design at the prototyping stage without manufacturing 
    an experimental sample. 
    In connection with the development of computing technologies, this problem can be 
    solved in software packages for three-dimensional analysis of structures using the finite 
    element method (FEM analysis). In this paper, the design of the studied AFPM engine is 
    evaluated using step-by-step time-based 3D FEM analysis in CAE SolidWorks 
    Simulation. 
    Although 3D modeling is more realistic among the calculations presented, it is 
    difficult require access to expensive software and take a lot of time. Analytical 
    calculations On the other hand, 2D modeling is much easier to perform and produces 
    results in good condition. 
    Performing a FEM analysis of an engine includes the stages of constructing a 
    geometric model of resonant frequencies in the object; creating a mesh surface with a 
    given step for analyzing temporal changes; selecting boundary conditions for modeling 
    (product materials, differentiation methods, etc.) and executing a program for solving 
    resonant frequency equations. The result of the analysis is a visualization of the 
    distribution of resonant frequencies on a spatial model of the engine, corresponding to the 
    dynamic load of each element. 
    Material properties, magnet and conductor sizes remain constant during the 
    simulation. However, as a result of performing FEM analysis, a change in the state and 
    dimensions of structures may occur due to their deformation under the influence of 
    resonant frequencies. The results of the frequency analysis of the power units of the 
    AFPM engine are presented in Figures 1 and 2. 


    МЕЖДУНАРОДНАЯ НАУЧНО-ТЕХНИЧЕСКАЯ КОНФЕРЕНЦИЯ 
    АКТУАЛЬНЫЕ ПРОБЛЕМЫ ЦИФРОВИЗАЦИИ ЭЛЕКТРОМЕХАНИЧЕСКИХ И
    ЭЛЕКТРОТЕХНОЛОГИЧЕСКИХ СИСТЕМ
    158
    Figure 1. FEM frequency analysis of power units of an axial motor with a permanent magnets 
    rotor at a resonant frequency of 5.2 kHz 
    Figure 2. FEM frequency analysis of power units of an axial motor with a permanent magnets 
    rotor at a resonant frequency of 21.146 kHz 
    Stress analysis showed that mechanical deformations that occur at resonant 
    frequencies above 3 kHz lead to significant deformations of the engine components. At 
    the resonant frequency of 11 kHz, the motor plates are subject to significant stress. 
    Mechanical stresses in the rotor are concentrated in the areas between the permanent 
    magnets and the steel core, reaching the greatest stress at the outer edge of the rotor plate. 
    The greatest oscillations on the rotor, reaching a value of 14.2 kHz, and deformations of 
    the plate, affecting its deviation from the axial location on the shaft, were noted. 
    A graph of the resonant frequencies of the engine depending on the number of FEM 
    analysis iterations performed is shown in Figure 3. 


    МЕЖДУНАРОДНАЯ НАУЧНО-ТЕХНИЧЕСКАЯ КОНФЕРЕНЦИЯ 
    АКТУАЛЬНЫЕ ПРОБЛЕМЫ ЦИФРОВИЗАЦИИ ЭЛЕКТРОМЕХАНИЧЕСКИХ И
    ЭЛЕКТРОТЕХНОЛОГИЧЕСКИХ СИСТЕМ
    159
    Figure 3. Graph of the resonant frequencies of the motor depending on the number of FEM 
    analysis iterations 

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    Analysis of the mechanical strength of the axial-flux electric drive

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