The influence of the structure of the rotor on the BLDC motor parameters in the dynamic states

This paper presents an algorithm and computer code for analyzing of the dynamics of the outer rotor permanent magnet brushless DC motor. The mathematical model of the motor includes: the electromagnetic field equation, the electric circuit equations and the equation of mechanical motion. The finite element method (FEM) has been applied. The influence of the magnetic circuit geometry of the rotor on the BLDC motor parameters has been investigated. Two different rotor structures have been considered. Selected results of the analysis are presented and discussed.