Speed Control of BLDC Motors Using MRAC

Abstract—

BLDC motors are widely used in various
industrial and household applications due to its higher
efficiency, reliability and better performance compared to
Brushed motor. A speed estimation algorithm based on
model reference adaptive control (MRAC) was proposed to
correct the speed error. When the parameter of the plant
changes with respect to time then the constant gain PI
controller action is not effective. In case of MRAC based
design the adjustable PI gain parameters corresponding to
changes in the plant will be determined by referring to
reference model specifying the property of desired control
system. This paper presents the method to design MRAC
based PI controller for speed control of BLDC motor using
Matlab.