3D Magnetic Field Model of a Permanent Magnet Ironless Axial Flux Motor with Additively Manufactured Non-Active Parts

Abstract

A simulation model of an ironless Axial-Flux Permanent-Magnet (AFPM) machines is presented. Indeed as accurate analytical methods do not yet exist for ironless AFPM, 3D Finite Element Analysis (FEA) is required at each time of an operating point. The purpose of this article is to show that for any operating point of the motor, the torque can be calculated from the distribution of the axial magnetic flux density obtained from only one 3D FEA. The proposed simulation model is validated by using a prototype of an AFPM ironless whose nonactive parts are additively manufactured. This first step through the 3D printing technology is simplified by the use of cylindrical magnets and plastic mechanical supports.

Model of an Ironless Axial Flux Permanent Magnet Motor Based on the Field Produced by a Single Magnet

“…Each rotor has 8 cylindrical magnets. The coils are trapezoidal in shape [4]. The magnetic field produced by the magnets in coils has been calculated by the proposed method.…”

“…In the case of ironless AFPM motor, the use of Lorentz law requires only the magnetic field produced by magnets. This is very useful when the geometry of the coils is very complex with no straightforward symmetry, as in [4] where a 3D Finite Element Analysis (FEA) is used to compute the magnetic field produced by magnets. The purpose of this article is to replace the 3D FEA by an appropriate model.…”

A systematic review on current research and developments on coreless axial‐flux permanent‐magnet machines

“…Some other articles discussed improving the efficiency of coreless SSDR topology through winding design [66,67], magnetic modelling [68][69][70][71], electromagnetic analysis [18,[72][73][74], structural analysis [75], rotor mechanical design analysis [76], torque analysis [77], comparative analysis of different topology [58,78], implementation of drive system [79,80], airgap magnetic flux design [81,82], material considerations [83] and so on.…”

“…[111]. Similarly, use of circular magnet with conventional arrangement was found in some articles, where discussions about developing efficient machine using magnetic modelling, optimisation winding design and magnet had been delineated [38, 77, 121, 124].…”

Ironless Axial Flux Wind Turbine Motor with Two Cylindrical Magnet Rings

“…The YASA topology is an interesting alternative [9] but remains difficult to manufacture locally in remote areas. Ironless motors are the simplest to manufacture because they do not require laminations or Soft Magnetic Composites (SMC) [10]. However, this motor has lower performances due to the non-canalization of the magnetic field.…”