Brushless DC Motor Speed Control by Using a DSP Controller

The most important feature of Brushless DC motor is the mechanical commutation configuration constituted by commutator and brushes are replaced by electronic commutation circuitry. It solves drawbacks caused by mechanical commutation. BLDC motor has less maintenance due to absence of brushes, enables operation at all speeds with rated load. Provide high efficiency, reduced size, and reduced maintenance and gives higher speed range; hence BLDC motors are used for large number of applications such as in medical field, fans, drones, transportation field, Electric vehicles, Electric ship, Automobile, Automation. In specialized fields such as when in high temperature position sensors does not work, this system plays important role. Brushless DC motors such as fans are smaller in size and weight than AC fans using shaded pole or universal motors. BLDC motors can work with the low voltage sources such as 24V or 12V DC supply, due to which BLDC motors can use for small fans, in electronic equipment, spindle drives, mobile equipments, it has high efficiency and ability to reverse rapidly.