Prospects for the use of 3d printing brushless electric motorfor experimental electric drives

Abstract

The main steps for designing and building brushless direct current (BLDC) motor by using 3D printing technology is described in the paper. The main methods of creating 3D models and technologies that can be used for 3D printing of individual parts of a collectorless electric motor are described. The ways of creating the main parts of the electric motor, such as: rotor, stator, rotor mounting, etc. are presented. The properties of the materials from which the main parts of the 3D-printed electric motor were made are described. The ways of balancing the rotor and the scheme of stator winding are shown. Tests of the manufactured electric motor were performed on a specially created stand, which contained both electric and mechanical load in the form of groups of resistors with a resistance of 1 Ohm connected by a star and a commercial electric motor connected to the shaft obtained by 3D printing technology. Oscillograms of test modes: motor and generator are given. In the course of laboratory research the real parameters of the obtained product were established, namely: maximum and minimum power consumption, maximum possible generation power, maximum rotor speed and parameters of mechanical and thermal stability of the material from which the electric machine was made. Also, a finite element study was conducted, during which a physical model of the toroidal core was developed to determine the parameters required for inclusion in the mathematical model of the simulation of the magnetic flux distribution in the stator magnetic circuit. During the simulation of the distribution of the magnetic flux in the motor by the finite element method, the value of the magnetic permeability of the material used for the manufacture of the stator was determined. As a result, conclusions are made about the possibility of designing and creating a rotating electric machine and its use in experimental electrical installations.