Advantages of BLDC Motors

The BLDC motor has three coils on the stator, each with two wires, and a total of six lead wires. In fact, because it is internally wired, only three wires are usually required, but it is still one more than the DC motor (brush motor) mentioned earlier. It will not move just by connecting the positive and negative poles of the battery. As for how to operate the BLDC motor, we will explain in the second part of this series. This time we will focus on the advantages of the BLDC motor.
The first feature of the BLDC motor is "high efficiency". Its gyroscopic force (torque) can be controlled to always maintain the maximum value. In the case of a DC motor (brush motor), the maximum torque can only be maintained for a moment during the rotation process, and it cannot always maintain the maximum value. If a DC motor (brush motor) wants to get the same torque as a BLDC motor, it can only enlarge its magnet. This is why a small BLDC motor can also produce powerful power.
The second feature is "good controllability", which is related to the first one. BLDC motors can get the torque, rotation speed, etc. you want without any error. BLDC motors can accurately feedback the target rotation speed, torque, etc. The heat generation and power consumption of the motor can be suppressed through precise control. If it is battery-driven, the driving time can be extended through careful control.
In addition, it is durable and has low electrical noise. The above two points are the advantages brought by brushless. However, DC motors (brush motors) will wear out after long-term use due to the contact between the brush and the commutator. Sparks will also be generated at the contact part. In particular, huge sparks and noise will occur when the gap of the commutator touches the brush. If you do not want to generate noise during use, you will consider using a BLDC motor.