This paper is divided into 7 chapters. Chapter 1 introduces the topic of brushless direct current (BLDC) motor drives and discussed the importance of such systems. It introduces the two main goals of my final project: to investigate a BLDC drive supplied for AC utility and to design a PCB board of BLDC motor.
Chapter 2 provides the theoretical background about power factor correction. It introduces basic DC-DC converter topologies, by pointing out the pros and contras for each, used in power factor correction converters with diode bridge rectifier.
Chapter 3 presents a novel bridgeless power factor correction converter topology used for BLDC motor drives. The parameter of the converters are designed for a 250 W BLDC drive used in low performance drive systems, like domestic applications or auxiliary industrial drives.
Chapter 4 is a short introduction to permanent magnet brushless direct current motors while Chapter 5 describes the operation of the whole drive system and presents simulation results carried out in Matlab/Simulink environment. Steady-state and dynamic performance are also evaluated. Comparative analysis is done with a conventional motor drive fed through a simple diode bridge rectifier to indicate power quality improvement.
A Printed Circuit Board of a VSI is designed in Chapter 6 for a given BLDC motor. It is used in a hybrid go-cart that is built by university students for an engineering competition.
Chapter 7 presents the concluded information and discussion of results.