Design And Stator Loss Calculation Of Double Rotor Axial Flux Permanent Magnet Motor For Electric Paraglide

In the 21 st century,with "green" and "environmental protection" as the theme of the era,clean energy as the power of transportation is more and more sought after by people and widely recognized by society.Paragliding,whether as a form of entertainment or a portable tool for disaster relief,has gradually entered people’s lives and has been promoted more frequently.However,the traditional paragliding is still driven by gas turbine,which has the disadvantages of high noise,heavy weight and high pollution.In recent years,with the promotion of electric paragliding,the above shortcomings of gas turbine paragliding have been made up However,most of the motors used in electric paragliders are mainly radial motors.Due to the high requirements for endurance of electric paragliders,there are strict requirements for the torque,weight and efficiency of the motor.In this paper,a double rotor axial flux permanent magnet motor for electric paragliders is designed,and the parameters and performance of the motor are optimized.The following aspects are discussed in this paper Research in this area:Firstly,the basic structure and characteristics of axial flux permanent magnet motor and dual rotor motor are introduced.The introduction of research on axial flux motor at home and abroad is consulted,and the related literature of design,optimization and loss calculation of axial flux motor is briefly described.Secondly,a double rotor axial flux permanent magnet motor is designed for the electric paraglider.The stator of the motor is yokeless and segmented arm,YASA structure,the performance of the motor with different pole slot coordination is compared and analyzed.The star vector principle is used in the phase separation design of the motor winding.At the same time,according to the structural characteristics of the motor without stator yoke,the stator bracket is used to connect the stator teeth,and its size is calculated.The rotor adopts the surface mounted magnetic pole structure,and the magnetic flux direction is compared and analyzed.The magnetic pole adopts the N-S structure.Then,the three-dimensional finite element model of the motor was established using ANSYS/Maxwell software,and the simulation under no-load and load conditions was carried out.The influence of the change of motor parameters on the performance of the motor is studied and analyzed.The influence of different shapes,different thicknesses,block division and different block directions of the permanent magnets on the motor performance has been studied,and the simulation results are compared.Permanent magnets with a trapezoidal shape and a thickness of 5mm,which are divided into blocks along the circumferential direction,are the best choice for the motor to achieve the best performance,and it also has the effect of optimizing the motor.Finally,the stator losses of the motor are calculated,that is,stator winding AC losses,stator core losses and stator support eddy current losses.Through research and analysis,the reasons for the loss of each part of the stator of the motor are explained.Then,the three-dimensional finite element software is used to simulate the motor under no-load and rated load conditions,and the losses of each part of the motor stator are solved.The stator iron loss and stator winding loss are relatively large,and the eddy current loss of the stator bracket is relatively smaller.