The brushless DC motor is developed on the basis of the brushed DC motor. It has the advantages of stepless speed regulation, wide speed regulation, strong overload capacity, good linearity, long life, small size, light weight and large output. It solves a series of problems existing in brushed motors, and is widely used in various fields such as industrial equipment, instrumentation, household appliances, robots, and medical equipment. Because brushless motors do not have brushes for active commutation, an electronic commutator is required for commutation. What the brushless DC motor driver accomplishes is the function of this electronic commutator.