Brushless motors have an overall higher speed and torque, and produce less noise than traditional brushed motors. They also run more efficiently and have little or no power loss, which is a problem that can accompany brushed motors due to increased friction caused by the brushes.
There are no carbon brushes.
Brushless DC motor does not have any carbon brushes, which reduces frequent replacement requirements of brushes and maintenance costs.
They perform better and are more efficient.
Brushless DC motors have better performance and efficiency as compared to the brushed DC motors due to the involvement of electronic control enabling high-level control over the speed and position of the motor.
Brushless DC motors also have a lifespan approximately 6 times higher than the counter brushed DC motor.
They don't create sparks - which reduces lifespan.
Brushes can cause high sparks which may result in short life or complete burnout of brushed DC motor. However, in the case of brushless DC motor, due to no spark issue, there are fewer chances of burnout due to sparking issues.
They are compact but with high torque.
Brushless DC motors are available in small compact sizes and also provide high torque to weight ratio making it suitable for many robotics and medical applications involving robotic arms and robotic legs.
They have a low operating noise.
Brushless DC motor produces comparatively low operating noise as compared to other motors of the same ratings. As in other motors, there is continuous contact of brushes resulting in noise and sparking during contact. Therefore, brushless DC motors are given preference where electrical noise needs to be avoided.
They generate maximum torque continuously.
Brushless DC motors can provide maximum torque continuously during rotation, while brushed DC motor can provide maximum torque at an only specific point of the rotation. For the same torque rating, the brushed motor will require a much bigger magnet as compared to the brushless DC motor. This results in a very compact and small-sized brushless DC motor proving very high torque rating.
They aren't prone to electromagnet heat issues.
Brushed DC motors have an issue with not being able to dissipate heat and quickly cool due to the presence of an electromagnet in the centre of the motor. The electromagnet keeps the motor hotter for longer, meaning it is less safe and economical than brushless DC motors which do not have an electromagnet in the centre and aren't similarly affected by the heating issue.