Fig. 9 and Fig. 10, step change of the speed reference at no load and full load are tracking the reference signal with zero steady state error. It is also found from Fig. 11 that the fast rejection of the effect caused by step change of load torque at constant speed reference entering to the control system with PI controller designed by pole placement is achieved. Supply phase voltage, line current and DC bus waveforms of BLDC are measured by digital storage scope YOKOGAWA DL1540C. Where the ratio of a voltage sensor is 500mV/DIV and a current sensor is 0.5A/DIV respectively (see in Fig. 12 and Fig. 13).