Characteristic Analysis of BLDC Motor considering various rotor shapes

BLDC모터의 회전자 형상변화에 의한 특성해석

The rotor of the BLDC motor has permanent magnets on its surface, and is alike the structure of the rotor of synchronous motors. When designing the BLDC motor which has a limited volume in a specific environment, it is important to consider the geometry of the rotor and the length of the airgap. This paper describes a design procedure by analyzing the induced voltage and cogging torque with changing the width of magnets and length of the airgap. And we made a prototype of BLDC motor with this design procedure and our experiment result shows that the cogging torque can be reduced significantly. Also we find a good agreement between the result of experiment and simulation values using Finite Element Analysis.