The Design of a High Power Factor Brushless DC Motor Drive

A high power factor brush less DC motor (BLDC) is designed and implemented in this paper. In order to increase the power factor of a BLDC drive, an active power factor controller is employed to improve the high input current harmonics created from the power diodes as well as the switching of the inverter. The detailed design of the power factor controller is analyzed and implemented. The BLDC drive is also described as well. The experimental results verify the feasibility of BLDC motor drive with designed APFC controller. In addition, the experimental results of a BLDC drive with and without APFC are compared and demonstrated that the former has the power factor correction capability much better than the latter does.