Proportional Integral and Derivative Control of Brushless DC Motor
Brushless DC (BLDC) motors are one of the electrical drives that are rapidly
gaining popularity, due to their high efficiency, good dynamic response and low
maintenance. In this paper, the modeling and simulation of the BLDC motor was done
using the software package MATLAB/SIMULINK. A speed controller has been designed
successfully for closed loop operation of the BLDC motor so that the motor runs very
closed to the reference speed. The simulated system has a fast response with small
overshoot and zero steady state error.
Dynamic Model of the BLDC Motor
It is assumed that the BLDC motor is connected to the output of the inverter, while the inverter input terminals are connected to a constant supply voltage, as shown in Fig.1. Another assumption is that there are no power losses in the inverter and the 3-phase motor winding is connected in star.