Soft Starting & Performance Evaluation of PI Speed Controller for Brushless DC Motor Using Three Phase Six Step Inverter

Along with the developments that occur on the use of DC brushless motor as a driver. Brushless DC motor (BLDC) has good performance, high speed, responsive, reliable and more efficient. Because of the advantages of the BLDC motor is often used in industries, electric vehicle propulsion and so forth. However, the use of BLDC motor has a problem that is the use of a very high starting current starting motor so as to cause energy stored in batteries or other energy storage is very quickly exhausted and reduced life time motor arena transient currents. It needs a control to make the starting BLDC motor to reduce the starting current spike by stepping step duty cycle inverter slowly until it reaches duty setting. In addition to the BLDC motor needs a control to set reach the set point rpm faster. Therefore, this paper describes the use of BLDC starting motor & BLDC motor speed setting with PI control. It will show the difference of starting current performance and BLDC speed when using the method.