Comparation of the slotless brushless DC motor (BLDC) and slotted BLDC using 2D modeling

The advantages and disadvantages of slotted brushless DC motor (BLDC) and slotless BLDC make the user confused when they want to choose BLDC motors. The objective of this research was to describe the characteristic of slotted BLDC and slotless BLDC using 2D finite element method. Result of this research showed that slotted BLDC has higher torque than slotless BLDC. The power produced by slotted and slotless BLDC were almost the same, while the speed of the slotless BLDC was 10 times higher than the speed of slotted BLDC. Slotted BLDC produced more ripple torque than slotless BLDC, thus it made slotted BLDC had higher vibration than slotless BLDC.