Brushless DC motors are a type of motor drive that combines synchronous motors and electronic control technology. They control the frequency of the stator's rotating magnetic field through electronic control (driver, including power supply and control), and feed back the motor rotor's speed to the control center for repeated correction to achieve a method close to the characteristics of a DC motor. This type of motor can control the motor rotor to maintain a certain speed within the rated load range when the load changes. Brushless DC motors do not have traditional brushes and commutators, so they have higher energy efficiency and longer service life, and are widely used in fields that require high performance and high reliability.