Design topology and electromagnetic field analysis of Permanent Magnet Brushless DC motor for electric scooter application

This paper presents a Finite Element Method (FEM) based design and analysis of radial flux Permanent Magnet Brushless DC (PMBLDC) motor. The objective of this paper is to develop high power density and high efficiency PMBLDC motor for electric scooter application. The motor considered for FEM design is a 3-phase, 8 pole rectangular wave, which replaces the conventional Internal Combustion Engines (ICEs). The distinct features of this motor design are: (1) The magnetic yoke reduction, which will decrease the weight and size, (2) Coil span equal to one slot pitch which will result in saving of copper and (3) elimination of cogging torque because of fractional number of slots per pole. The outer rotor configuration of PMBLDC motor has been considered in this design. The spokes of the wheel is directly fitted into the outer rotor of the motor. The simulation has been carried out by Pre-flux software. The electromagnetic field analysis is used for the design and optimization of the motor which is based on FEM.