Comparative study of four BLDC motor configurations for a ventricular assist device with axial impeller without central axis

Abstract

In this work, the electromagnetic and mechanical behavior of four configurations for a brushless direct current motor (BLDC) was analyzed to determine which one represents the most suitable option for its implementation in a ventricular assist device with a central shaftless axial impeller. For this, a numerical simulation of computational electromagnetism based on the Finite Element Method is performed. From these simulations, the initial electrical angles where the torque is maximum, the distribution of the magnetic flux density, and the torque as a function of time for each configuration of the BLDC motor were obtained. Finally, it was found that for the physical and geometric parameters used, a 10-pole and 12-slot BLDC motor represents the most viable option for the ventricular assist device.