Embedded speed control of BLDC motors using LPC1549 microcontroller

Abstract

This paper presents a speed controller of a Brushless DC motor using root locus method. The control algorithm of the Brushless DC motor is implemented on LPC1549 microcontroller, using a hardware event driven state machine. This algorithm runs on a state configurable timer peripheral, without any intervention of the processor. The Hall sensors of the low cost motor are software calibrated in order reduce the output speed noise from the Brushless DC motor. The computational power of the microcontroller is used in order to achieve acceptable performances from a low cost Brushless DC motor.