Description

Due to their superior efficiency, excellent controllability, and higher speed capabilities, brushless DC motors (BLDC) are one of the most widely used DC motors. These characteristics make BLDC suitable for many kinds of applications in a large variety of industries. Nowadays, BLDC motors are nearly everywhere and have a solid role in manufacturing and industrial applications as actuators and in CNC machine tools. Similarly, its efficiency has made it a popular choice for white goods, computer hard drives, electric and hybrid vehicles, and even medical equipment. In the automotive industry, its presence is expected to increase due to the growing number of electromechanical in-vehicle systems, including HVAC systems, fuel and water pumps, anti-lock braking systems (ABS), and power steering systems. This application note explains the main features of brushless DC motors, their control methodology, and how different aspects between BLDC and BDC motors compare.