Closed loop speed control of a laboratory fabricated brush-less DC motor drive prototype using position sensor

This paper presents steps and procedures of designing a closed loop speed controller for a surface mounted permanent magnet(SM-PM) brush-less DC machine(BLDC). The closed-loop speed control technique has been implemented using Hall-effect position sensor. The BLDC motor control algorithm has been modelled and simulated first. The same has been thereafter practically implemented on a 0.75 hp, 1500 r.p.m BLDC motor that was designed and developed as a lab prototype. Both the simulation and the experimental results are in excellent in agreements.