Brushless DC motors are best used for space saving, low power consumption, continuous duty applications where high torque is required from low to high speeds due to the flat speed-torque characteristics. BLDC motors have a compact, high-efficiency design which offers a wider speed range and high speed regulation when compared to AC speed control motors.
Brushless DC Motor vs. AC Motor vs. Brushed Motor
Brushless DC Motors vs. Servo Motors vs. Inverters